// Copyright (C) 2002-2012 Nikolaus Gebhardt // This file is part of the "Irrlicht Engine". // For conditions of distribution and use, see copyright notice in irrlicht.h #ifndef IRR_MATRIX_H_INCLUDED #define IRR_MATRIX_H_INCLUDED #include "irrMath.h" #include "vector3d.h" #include "vector2d.h" #include "plane3d.h" #include "aabbox3d.h" #include "rect.h" #include "irrString.h" // enable this to keep track of changes to the matrix // and make simpler identity check for seldom changing matrices // otherwise identity check will always compare the elements //#define USE_MATRIX_TEST // this is only for debugging purposes //#define USE_MATRIX_TEST_DEBUG #if defined( USE_MATRIX_TEST_DEBUG ) struct MatrixTest { MatrixTest () : ID(0), Calls(0) {} char buf[256]; int Calls; int ID; }; static MatrixTest MTest; #endif namespace irr { namespace core { //! 4x4 matrix. Mostly used as transformation matrix for 3d calculations. /** The matrix is a D3D style matrix, row major with translations in the 4th row. */ template class CMatrix4 { public: //! Constructor Flags enum eConstructor { EM4CONST_NOTHING = 0, EM4CONST_COPY, EM4CONST_IDENTITY, EM4CONST_TRANSPOSED, EM4CONST_INVERSE, EM4CONST_INVERSE_TRANSPOSED }; //! Default constructor /** \param constructor Choose the initialization style */ CMatrix4( eConstructor constructor = EM4CONST_IDENTITY ); //! Constructor with value initialization CMatrix4(const T& r0c0, const T& r0c1, const T& r0c2, const T& r0c3, const T& r1c0, const T& r1c1, const T& r1c2, const T& r1c3, const T& r2c0, const T& r2c1, const T& r2c2, const T& r2c3, const T& r3c0, const T& r3c1, const T& r3c2, const T& r3c3) { M[0] = r0c0; M[1] = r0c1; M[2] = r0c2; M[3] = r0c3; M[4] = r1c0; M[5] = r1c1; M[6] = r1c2; M[7] = r1c3; M[8] = r2c0; M[9] = r2c1; M[10] = r2c2; M[11] = r2c3; M[12] = r3c0; M[13] = r3c1; M[14] = r3c2; M[15] = r3c3; } //! Copy constructor /** \param other Other matrix to copy from \param constructor Choose the initialization style */ CMatrix4(const CMatrix4& other, eConstructor constructor = EM4CONST_COPY); //! Simple operator for directly accessing every element of the matrix. T& operator()(const s32 row, const s32 col) { #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=false; #endif return M[ row * 4 + col ]; } //! Simple operator for directly accessing every element of the matrix. const T& operator()(const s32 row, const s32 col) const { return M[row * 4 + col]; } //! Simple operator for linearly accessing every element of the matrix. T& operator[](u32 index) { #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=false; #endif return M[index]; } //! Simple operator for linearly accessing every element of the matrix. const T& operator[](u32 index) const { return M[index]; } //! Sets this matrix equal to the other matrix. inline CMatrix4& operator=(const CMatrix4 &other); //! Sets all elements of this matrix to the value. inline CMatrix4& operator=(const T& scalar); //! Returns pointer to internal array const T* pointer() const { return M; } T* pointer() { #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=false; #endif return M; } //! Returns true if other matrix is equal to this matrix. bool operator==(const CMatrix4 &other) const; //! Returns true if other matrix is not equal to this matrix. bool operator!=(const CMatrix4 &other) const; //! Add another matrix. CMatrix4 operator+(const CMatrix4& other) const; //! Add another matrix. CMatrix4& operator+=(const CMatrix4& other); //! Subtract another matrix. CMatrix4 operator-(const CMatrix4& other) const; //! Subtract another matrix. CMatrix4& operator-=(const CMatrix4& other); //! set this matrix to the product of two matrices /** Calculate b*a */ inline CMatrix4& setbyproduct(const CMatrix4& other_a,const CMatrix4& other_b ); //! Set this matrix to the product of two matrices /** Calculate b*a, no optimization used, use it if you know you never have an identity matrix */ CMatrix4& setbyproduct_nocheck(const CMatrix4& other_a,const CMatrix4& other_b ); //! Multiply by another matrix. /** Calculate other*this */ CMatrix4 operator*(const CMatrix4& other) const; //! Multiply by another matrix. /** Like calling: (*this) = (*this) * other */ CMatrix4& operator*=(const CMatrix4& other); //! Multiply by scalar. CMatrix4 operator*(const T& scalar) const; //! Multiply by scalar. CMatrix4& operator*=(const T& scalar); //! Set matrix to identity. inline CMatrix4& makeIdentity(); //! Returns true if the matrix is the identity matrix inline bool isIdentity() const; //! Returns true if the matrix is orthogonal inline bool isOrthogonal() const; //! Returns true if the matrix is the identity matrix bool isIdentity_integer_base () const; //! Set the translation of the current matrix. Will erase any previous values. CMatrix4& setTranslation( const vector3d& translation ); //! Gets the current translation vector3d getTranslation() const; //! Set the inverse translation of the current matrix. Will erase any previous values. CMatrix4& setInverseTranslation( const vector3d& translation ); //! Make a rotation matrix from Euler angles. The 4th row and column are unmodified. inline CMatrix4& setRotationRadians( const vector3d& rotation ); //! Make a rotation matrix from Euler angles. The 4th row and column are unmodified. CMatrix4& setRotationDegrees( const vector3d& rotation ); //! Get the rotation, as set by setRotation() when you already know the scale used to create the matrix /** NOTE: The scale needs to be the correct one used to create this matrix. You can _not_ use the result of getScale(), but have to save your scale variable in another place (like ISceneNode does). NOTE: No scale value can be 0 or the result is undefined. NOTE: It does not necessarily return the *same* Euler angles as those set by setRotationDegrees(), but the rotation will be equivalent, i.e. will have the same result when used to rotate a vector or node. NOTE: It will (usually) give wrong results when further transformations have been added in the matrix (like shear). WARNING: There have been troubles with this function over the years and we may still have missed some corner cases. It's generally safer to keep the rotation and scale you used to create the matrix around and work with those. */ core::vector3d getRotationDegrees(const vector3d& scale) const; //! Returns the rotation, as set by setRotation(). /** NOTE: You will have the same end-rotation as used in setRotation, but it might not use the same axis values. NOTE: This only works correct if no other matrix operations have been done on the inner 3x3 matrix besides setting rotation (so no scale/shear). Thought it (probably) works as long as scale doesn't flip handedness. NOTE: It does not necessarily return the *same* Euler angles as those set by setRotationDegrees(), but the rotation will be equivalent, i.e. will have the same result when used to rotate a vector or node. */ core::vector3d getRotationDegrees() const; //! Make an inverted rotation matrix from Euler angles. /** The 4th row and column are unmodified. */ inline CMatrix4& setInverseRotationRadians( const vector3d& rotation ); //! Make an inverted rotation matrix from Euler angles. /** The 4th row and column are unmodified. */ inline CMatrix4& setInverseRotationDegrees( const vector3d& rotation ); //! Make a rotation matrix from angle and axis, assuming left handed rotation. /** The 4th row and column are unmodified. */ inline CMatrix4& setRotationAxisRadians(const T& angle, const vector3d& axis); //! Set Scale CMatrix4& setScale( const vector3d& scale ); //! Set Scale CMatrix4& setScale( const T scale ) { return setScale(core::vector3d(scale,scale,scale)); } //! Get Scale core::vector3d getScale() const; //! Translate a vector by the inverse of the translation part of this matrix. void inverseTranslateVect( vector3df& vect ) const; //! Transform (rotate/scale) a vector by the inverse of the rotation part this matrix void inverseRotateVect( vector3df& vect ) const; //! Transform (rotate/scale) a vector by the rotation part of this matrix. void rotateVect( vector3df& vect ) const; //! An alternate transform vector method, writing into a second vector void rotateVect(core::vector3df& out, const core::vector3df& in) const; //! An alternate transform vector method, writing into an array of 3 floats void rotateVect(T *out,const core::vector3df &in) const; //! Transforms the vector by this matrix /** This operation is performed as if the vector was 4d with the 4th component =1 */ void transformVect( vector3df& vect) const; //! Transforms input vector by this matrix and stores result in output vector /** This operation is performed as if the vector was 4d with the 4th component =1 */ void transformVect( vector3df& out, const vector3df& in ) const; //! An alternate transform vector method, writing into an array of 4 floats /** This operation is performed as if the vector was 4d with the 4th component =1. NOTE: out[3] will be written to (4th vector component)*/ void transformVect(T *out,const core::vector3df &in) const; //! An alternate transform vector method, reading from and writing to an array of 3 floats /** This operation is performed as if the vector was 4d with the 4th component =1 NOTE: out[3] will be written to (4th vector component)*/ void transformVec3(T *out, const T * in) const; //! An alternate transform vector method, reading from and writing to an array of 4 floats void transformVec4(T *out, const T * in) const; //! Translate a vector by the translation part of this matrix. /** This operation is performed as if the vector was 4d with the 4th component =1 */ void translateVect( vector3df& vect ) const; //! Transforms a plane by this matrix void transformPlane( core::plane3d &plane) const; //! Transforms a plane by this matrix void transformPlane( const core::plane3d &in, core::plane3d &out) const; //! Transforms a axis aligned bounding box /** The result box of this operation may not be accurate at all. For correct results, use transformBoxEx() */ void transformBox(core::aabbox3d& box) const; //! Transforms a axis aligned bounding box /** The result box of this operation should be accurate, but this operation is slower than transformBox(). */ void transformBoxEx(core::aabbox3d& box) const; //! Multiplies this matrix by a 1x4 matrix void multiplyWith1x4Matrix(T* matrix) const; //! Calculates inverse of matrix. Slow. /** \return Returns false if there is no inverse matrix.*/ bool makeInverse(); //! Inverts a primitive matrix which only contains a translation and a rotation /** \param out: where result matrix is written to. */ bool getInversePrimitive ( CMatrix4& out ) const; //! Gets the inverse matrix of this one /** \param out: where result matrix is written to. \return Returns false if there is no inverse matrix. */ bool getInverse(CMatrix4& out) const; //! Tool function to build a perspective projection matrix /** Mainly for use of the other perspective projection build functions. But can also be used by users (can be useful if you don't work with matrices with T=f32). \param sx: x scale factor (depth/half_width from clipped frustum planes parallel to the camera) \param sy: y scale factor (depth/half_height from clipped frustum planes parallel to the camera) \param zNear: Distance to near plane \param zFar: Distance to far plane param zClipFromZero: Clipping of z can be projected from 0 to w when true (D3D style) and from -w to w when false (OGL style) \param zSign: 1 for left-handed projection matrix, -1 for right-handed projection matrix */ CMatrix4& buildProjectionMatrixPerspectiveFov(T sx, T sy, T zNear, T zFar, bool zClipFromZero, T zSign); //! Builds a right-handed perspective projection matrix based on a field of view //\param zClipFromZero: Clipping of z can be projected from 0 to w when true (D3D style) and from -w to w when false (OGL style). CMatrix4& buildProjectionMatrixPerspectiveFovRH(f32 fieldOfViewRadiansY, f32 aspectRatio, f32 zNear, f32 zFar, bool zClipFromZero=true); //! Builds a left-handed perspective projection matrix based on a field of view CMatrix4& buildProjectionMatrixPerspectiveFovLH(f32 fieldOfViewRadiansY, f32 aspectRatio, f32 zNear, f32 zFar, bool zClipFromZero=true); //! Builds a left-handed perspective projection matrix based on a field of view, with far plane at infinity CMatrix4& buildProjectionMatrixPerspectiveFovInfinityLH(f32 fieldOfViewRadiansY, f32 aspectRatio, f32 zNear, f32 epsilon=0); //! Builds a right-handed perspective projection matrix. CMatrix4& buildProjectionMatrixPerspectiveRH(f32 widthOfViewVolume, f32 heightOfViewVolume, f32 zNear, f32 zFar, bool zClipFromZero=true); //! Builds a left-handed perspective projection matrix. //\param widthOfViewVolume: width of clipped near frustum plane //\param heightOfViewVolume: height of clipped near frustum plane CMatrix4& buildProjectionMatrixPerspectiveLH(f32 widthOfViewVolume, f32 heightOfViewVolume, f32 zNear, f32 zFar, bool zClipFromZero=true); //! Builds a left-handed orthogonal projection matrix. //\param zClipFromZero: Clipping of z can be projected from 0 to 1 when true (D3D style) and from -1 to 1 when false (OGL style). CMatrix4& buildProjectionMatrixOrthoLH(f32 widthOfViewVolume, f32 heightOfViewVolume, f32 zNear, f32 zFar, bool zClipFromZero=true); //! Builds a right-handed orthogonal projection matrix. CMatrix4& buildProjectionMatrixOrthoRH(f32 widthOfViewVolume, f32 heightOfViewVolume, f32 zNear, f32 zFar, bool zClipFromZero=true); //! Builds a left-handed look-at matrix. CMatrix4& buildCameraLookAtMatrixLH( const vector3df& position, const vector3df& target, const vector3df& upVector); //! Builds a right-handed look-at matrix. CMatrix4& buildCameraLookAtMatrixRH( const vector3df& position, const vector3df& target, const vector3df& upVector); //! Builds a matrix that flattens geometry into a plane. /** \param light: light source \param plane: plane into which the geometry if flattened into \param point: value between 0 and 1, describing the light source. If this is 1, it is a point light, if it is 0, it is a directional light. */ CMatrix4& buildShadowMatrix(const core::vector3df& light, core::plane3df plane, f32 point=1.0f); //! Builds a matrix which transforms a normalized Device Coordinate to Device Coordinates. /** Used to scale <-1,-1><1,1> to viewport, for example from <-1,-1> <1,1> to the viewport <0,0><0,640> */ CMatrix4& buildNDCToDCMatrix( const core::rect& area, f32 zScale); //! Creates a new matrix as interpolated matrix from two other ones. /** \param b: other matrix to interpolate with \param time: Must be a value between 0 and 1. */ CMatrix4 interpolate(const core::CMatrix4& b, f32 time) const; //! Gets transposed matrix CMatrix4 getTransposed() const; //! Gets transposed matrix inline void getTransposed( CMatrix4& dest ) const; //! Builds a matrix that rotates from one vector to another /** \param from: vector to rotate from \param to: vector to rotate to */ CMatrix4& buildRotateFromTo(const core::vector3df& from, const core::vector3df& to); //! Builds a combined matrix which translates to a center before rotation and translates from origin afterwards /** \param center Position to rotate around \param translate Translation applied after the rotation */ void setRotationCenter(const core::vector3df& center, const core::vector3df& translate); //! Builds a matrix which rotates a source vector to a look vector over an arbitrary axis /** \param camPos: viewer position in world coo \param center: object position in world-coo and rotation pivot \param translation: object final translation from center \param axis: axis to rotate about \param from: source vector to rotate from */ void buildAxisAlignedBillboard(const core::vector3df& camPos, const core::vector3df& center, const core::vector3df& translation, const core::vector3df& axis, const core::vector3df& from); /* construct 2D Texture transformations rotate about center, scale, and transform. */ //! Set to a texture transformation matrix with the given parameters. CMatrix4& buildTextureTransform( f32 rotateRad, const core::vector2df &rotatecenter, const core::vector2df &translate, const core::vector2df &scale); //! Set texture transformation rotation /** Rotate about z axis, recenter at (0.5,0.5). Doesn't clear other elements than those affected \param radAngle Angle in radians \return Altered matrix */ CMatrix4& setTextureRotationCenter( f32 radAngle ); //! Set texture transformation translation /** Doesn't clear other elements than those affected. \param x Offset on x axis \param y Offset on y axis \return Altered matrix */ CMatrix4& setTextureTranslate( f32 x, f32 y ); //! Get texture transformation translation /** \param x returns offset on x axis \param y returns offset on y axis */ void getTextureTranslate( f32& x, f32& y ) const; //! Set texture transformation translation, using a transposed representation /** Doesn't clear other elements than those affected. \param x Offset on x axis \param y Offset on y axis \return Altered matrix */ CMatrix4& setTextureTranslateTransposed( f32 x, f32 y ); //! Set texture transformation scale /** Doesn't clear other elements than those affected. \param sx Scale factor on x axis \param sy Scale factor on y axis \return Altered matrix. */ CMatrix4& setTextureScale( f32 sx, f32 sy ); //! Get texture transformation scale /** \param sx Returns x axis scale factor \param sy Returns y axis scale factor */ void getTextureScale( f32& sx, f32& sy ) const; //! Set texture transformation scale, and recenter at (0.5,0.5) /** Doesn't clear other elements than those affected. \param sx Scale factor on x axis \param sy Scale factor on y axis \return Altered matrix. */ CMatrix4& setTextureScaleCenter( f32 sx, f32 sy ); //! Sets all matrix data members at once CMatrix4& setM(const T* data); //! Sets if the matrix is definitely identity matrix void setDefinitelyIdentityMatrix( bool isDefinitelyIdentityMatrix); //! Gets if the matrix is definitely identity matrix bool getDefinitelyIdentityMatrix() const; //! Compare two matrices using the equal method bool equals(const core::CMatrix4& other, const T tolerance=(T)ROUNDING_ERROR_f64) const; private: //! Matrix data, stored in row-major order T M[16]; #if defined ( USE_MATRIX_TEST ) //! Flag is this matrix is identity matrix mutable u32 definitelyIdentityMatrix; #endif #if defined ( USE_MATRIX_TEST_DEBUG ) u32 id; mutable u32 calls; #endif }; // Default constructor template inline CMatrix4::CMatrix4( eConstructor constructor ) #if defined ( USE_MATRIX_TEST ) : definitelyIdentityMatrix(BIT_UNTESTED) #endif #if defined ( USE_MATRIX_TEST_DEBUG ) ,id ( MTest.ID++), calls ( 0 ) #endif { switch ( constructor ) { case EM4CONST_NOTHING: case EM4CONST_COPY: break; case EM4CONST_IDENTITY: case EM4CONST_INVERSE: default: makeIdentity(); break; } } // Copy constructor template inline CMatrix4::CMatrix4( const CMatrix4& other, eConstructor constructor) #if defined ( USE_MATRIX_TEST ) : definitelyIdentityMatrix(BIT_UNTESTED) #endif #if defined ( USE_MATRIX_TEST_DEBUG ) ,id ( MTest.ID++), calls ( 0 ) #endif { switch ( constructor ) { case EM4CONST_IDENTITY: makeIdentity(); break; case EM4CONST_NOTHING: break; case EM4CONST_COPY: *this = other; break; case EM4CONST_TRANSPOSED: other.getTransposed(*this); break; case EM4CONST_INVERSE: if (!other.getInverse(*this)) memset(M, 0, 16*sizeof(T)); break; case EM4CONST_INVERSE_TRANSPOSED: if (!other.getInverse(*this)) memset(M, 0, 16*sizeof(T)); else *this=getTransposed(); break; } } //! Add another matrix. template inline CMatrix4 CMatrix4::operator+(const CMatrix4& other) const { CMatrix4 temp ( EM4CONST_NOTHING ); temp[0] = M[0]+other[0]; temp[1] = M[1]+other[1]; temp[2] = M[2]+other[2]; temp[3] = M[3]+other[3]; temp[4] = M[4]+other[4]; temp[5] = M[5]+other[5]; temp[6] = M[6]+other[6]; temp[7] = M[7]+other[7]; temp[8] = M[8]+other[8]; temp[9] = M[9]+other[9]; temp[10] = M[10]+other[10]; temp[11] = M[11]+other[11]; temp[12] = M[12]+other[12]; temp[13] = M[13]+other[13]; temp[14] = M[14]+other[14]; temp[15] = M[15]+other[15]; return temp; } //! Add another matrix. template inline CMatrix4& CMatrix4::operator+=(const CMatrix4& other) { M[0]+=other[0]; M[1]+=other[1]; M[2]+=other[2]; M[3]+=other[3]; M[4]+=other[4]; M[5]+=other[5]; M[6]+=other[6]; M[7]+=other[7]; M[8]+=other[8]; M[9]+=other[9]; M[10]+=other[10]; M[11]+=other[11]; M[12]+=other[12]; M[13]+=other[13]; M[14]+=other[14]; M[15]+=other[15]; return *this; } //! Subtract another matrix. template inline CMatrix4 CMatrix4::operator-(const CMatrix4& other) const { CMatrix4 temp ( EM4CONST_NOTHING ); temp[0] = M[0]-other[0]; temp[1] = M[1]-other[1]; temp[2] = M[2]-other[2]; temp[3] = M[3]-other[3]; temp[4] = M[4]-other[4]; temp[5] = M[5]-other[5]; temp[6] = M[6]-other[6]; temp[7] = M[7]-other[7]; temp[8] = M[8]-other[8]; temp[9] = M[9]-other[9]; temp[10] = M[10]-other[10]; temp[11] = M[11]-other[11]; temp[12] = M[12]-other[12]; temp[13] = M[13]-other[13]; temp[14] = M[14]-other[14]; temp[15] = M[15]-other[15]; return temp; } //! Subtract another matrix. template inline CMatrix4& CMatrix4::operator-=(const CMatrix4& other) { M[0]-=other[0]; M[1]-=other[1]; M[2]-=other[2]; M[3]-=other[3]; M[4]-=other[4]; M[5]-=other[5]; M[6]-=other[6]; M[7]-=other[7]; M[8]-=other[8]; M[9]-=other[9]; M[10]-=other[10]; M[11]-=other[11]; M[12]-=other[12]; M[13]-=other[13]; M[14]-=other[14]; M[15]-=other[15]; return *this; } //! Multiply by scalar. template inline CMatrix4 CMatrix4::operator*(const T& scalar) const { CMatrix4 temp ( EM4CONST_NOTHING ); temp[0] = M[0]*scalar; temp[1] = M[1]*scalar; temp[2] = M[2]*scalar; temp[3] = M[3]*scalar; temp[4] = M[4]*scalar; temp[5] = M[5]*scalar; temp[6] = M[6]*scalar; temp[7] = M[7]*scalar; temp[8] = M[8]*scalar; temp[9] = M[9]*scalar; temp[10] = M[10]*scalar; temp[11] = M[11]*scalar; temp[12] = M[12]*scalar; temp[13] = M[13]*scalar; temp[14] = M[14]*scalar; temp[15] = M[15]*scalar; return temp; } //! Multiply by scalar. template inline CMatrix4& CMatrix4::operator*=(const T& scalar) { M[0]*=scalar; M[1]*=scalar; M[2]*=scalar; M[3]*=scalar; M[4]*=scalar; M[5]*=scalar; M[6]*=scalar; M[7]*=scalar; M[8]*=scalar; M[9]*=scalar; M[10]*=scalar; M[11]*=scalar; M[12]*=scalar; M[13]*=scalar; M[14]*=scalar; M[15]*=scalar; return *this; } //! Multiply by another matrix. template inline CMatrix4& CMatrix4::operator*=(const CMatrix4& other) { #if defined ( USE_MATRIX_TEST ) // do checks on your own in order to avoid copy creation if ( !other.isIdentity() ) { if ( this->isIdentity() ) { return (*this = other); } else { CMatrix4 temp ( *this ); return setbyproduct_nocheck( temp, other ); } } return *this; #else CMatrix4 temp ( *this ); return setbyproduct_nocheck( temp, other ); #endif } //! multiply by another matrix // set this matrix to the product of two other matrices // goal is to reduce stack use and copy template inline CMatrix4& CMatrix4::setbyproduct_nocheck(const CMatrix4& other_a,const CMatrix4& other_b ) { const T *m1 = other_a.M; const T *m2 = other_b.M; M[0] = m1[0]*m2[0] + m1[4]*m2[1] + m1[8]*m2[2] + m1[12]*m2[3]; M[1] = m1[1]*m2[0] + m1[5]*m2[1] + m1[9]*m2[2] + m1[13]*m2[3]; M[2] = m1[2]*m2[0] + m1[6]*m2[1] + m1[10]*m2[2] + m1[14]*m2[3]; M[3] = m1[3]*m2[0] + m1[7]*m2[1] + m1[11]*m2[2] + m1[15]*m2[3]; M[4] = m1[0]*m2[4] + m1[4]*m2[5] + m1[8]*m2[6] + m1[12]*m2[7]; M[5] = m1[1]*m2[4] + m1[5]*m2[5] + m1[9]*m2[6] + m1[13]*m2[7]; M[6] = m1[2]*m2[4] + m1[6]*m2[5] + m1[10]*m2[6] + m1[14]*m2[7]; M[7] = m1[3]*m2[4] + m1[7]*m2[5] + m1[11]*m2[6] + m1[15]*m2[7]; M[8] = m1[0]*m2[8] + m1[4]*m2[9] + m1[8]*m2[10] + m1[12]*m2[11]; M[9] = m1[1]*m2[8] + m1[5]*m2[9] + m1[9]*m2[10] + m1[13]*m2[11]; M[10] = m1[2]*m2[8] + m1[6]*m2[9] + m1[10]*m2[10] + m1[14]*m2[11]; M[11] = m1[3]*m2[8] + m1[7]*m2[9] + m1[11]*m2[10] + m1[15]*m2[11]; M[12] = m1[0]*m2[12] + m1[4]*m2[13] + m1[8]*m2[14] + m1[12]*m2[15]; M[13] = m1[1]*m2[12] + m1[5]*m2[13] + m1[9]*m2[14] + m1[13]*m2[15]; M[14] = m1[2]*m2[12] + m1[6]*m2[13] + m1[10]*m2[14] + m1[14]*m2[15]; M[15] = m1[3]*m2[12] + m1[7]*m2[13] + m1[11]*m2[14] + m1[15]*m2[15]; #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=false; #endif return *this; } //! multiply by another matrix // set this matrix to the product of two other matrices // goal is to reduce stack use and copy template inline CMatrix4& CMatrix4::setbyproduct(const CMatrix4& other_a, const CMatrix4& other_b ) { #if defined ( USE_MATRIX_TEST ) if ( other_a.isIdentity () ) return (*this = other_b); else if ( other_b.isIdentity () ) return (*this = other_a); else return setbyproduct_nocheck(other_a,other_b); #else return setbyproduct_nocheck(other_a,other_b); #endif } //! multiply by another matrix template inline CMatrix4 CMatrix4::operator*(const CMatrix4& m2) const { #if defined ( USE_MATRIX_TEST ) // Testing purpose.. if ( this->isIdentity() ) return m2; if ( m2.isIdentity() ) return *this; #endif CMatrix4 m3 ( EM4CONST_NOTHING ); const T *m1 = M; m3[0] = m1[0]*m2[0] + m1[4]*m2[1] + m1[8]*m2[2] + m1[12]*m2[3]; m3[1] = m1[1]*m2[0] + m1[5]*m2[1] + m1[9]*m2[2] + m1[13]*m2[3]; m3[2] = m1[2]*m2[0] + m1[6]*m2[1] + m1[10]*m2[2] + m1[14]*m2[3]; m3[3] = m1[3]*m2[0] + m1[7]*m2[1] + m1[11]*m2[2] + m1[15]*m2[3]; m3[4] = m1[0]*m2[4] + m1[4]*m2[5] + m1[8]*m2[6] + m1[12]*m2[7]; m3[5] = m1[1]*m2[4] + m1[5]*m2[5] + m1[9]*m2[6] + m1[13]*m2[7]; m3[6] = m1[2]*m2[4] + m1[6]*m2[5] + m1[10]*m2[6] + m1[14]*m2[7]; m3[7] = m1[3]*m2[4] + m1[7]*m2[5] + m1[11]*m2[6] + m1[15]*m2[7]; m3[8] = m1[0]*m2[8] + m1[4]*m2[9] + m1[8]*m2[10] + m1[12]*m2[11]; m3[9] = m1[1]*m2[8] + m1[5]*m2[9] + m1[9]*m2[10] + m1[13]*m2[11]; m3[10] = m1[2]*m2[8] + m1[6]*m2[9] + m1[10]*m2[10] + m1[14]*m2[11]; m3[11] = m1[3]*m2[8] + m1[7]*m2[9] + m1[11]*m2[10] + m1[15]*m2[11]; m3[12] = m1[0]*m2[12] + m1[4]*m2[13] + m1[8]*m2[14] + m1[12]*m2[15]; m3[13] = m1[1]*m2[12] + m1[5]*m2[13] + m1[9]*m2[14] + m1[13]*m2[15]; m3[14] = m1[2]*m2[12] + m1[6]*m2[13] + m1[10]*m2[14] + m1[14]*m2[15]; m3[15] = m1[3]*m2[12] + m1[7]*m2[13] + m1[11]*m2[14] + m1[15]*m2[15]; return m3; } template inline vector3d CMatrix4::getTranslation() const { return vector3d(M[12], M[13], M[14]); } template inline CMatrix4& CMatrix4::setTranslation( const vector3d& translation ) { M[12] = translation.X; M[13] = translation.Y; M[14] = translation.Z; #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=false; #endif return *this; } template inline CMatrix4& CMatrix4::setInverseTranslation( const vector3d& translation ) { M[12] = -translation.X; M[13] = -translation.Y; M[14] = -translation.Z; #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=false; #endif return *this; } template inline CMatrix4& CMatrix4::setScale( const vector3d& scale ) { M[0] = scale.X; M[5] = scale.Y; M[10] = scale.Z; #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=false; #endif return *this; } //! Returns the absolute values of the scales of the matrix. /** Note: You only get back original values if the matrix only set the scale. Otherwise the result is a scale you can use to normalize the matrix axes, but it's usually no longer what you did set with setScale. */ template inline vector3d CMatrix4::getScale() const { // See http://www.robertblum.com/articles/2005/02/14/decomposing-matrices // Deal with the 0 rotation case first // Prior to Irrlicht 1.6, we always returned this value. if(core::iszero(M[1]) && core::iszero(M[2]) && core::iszero(M[4]) && core::iszero(M[6]) && core::iszero(M[8]) && core::iszero(M[9])) return vector3d(M[0], M[5], M[10]); // We have to do the full calculation. return vector3d(sqrtf(M[0] * M[0] + M[1] * M[1] + M[2] * M[2]), sqrtf(M[4] * M[4] + M[5] * M[5] + M[6] * M[6]), sqrtf(M[8] * M[8] + M[9] * M[9] + M[10] * M[10])); } template inline CMatrix4& CMatrix4::setRotationDegrees( const vector3d& rotation ) { return setRotationRadians( rotation * core::DEGTORAD ); } template inline CMatrix4& CMatrix4::setInverseRotationDegrees( const vector3d& rotation ) { return setInverseRotationRadians( rotation * core::DEGTORAD ); } template inline CMatrix4& CMatrix4::setRotationRadians( const vector3d& rotation ) { const f64 cr = cos( rotation.X ); const f64 sr = sin( rotation.X ); const f64 cp = cos( rotation.Y ); const f64 sp = sin( rotation.Y ); const f64 cy = cos( rotation.Z ); const f64 sy = sin( rotation.Z ); M[0] = (T)( cp*cy ); M[1] = (T)( cp*sy ); M[2] = (T)( -sp ); const f64 srsp = sr*sp; const f64 crsp = cr*sp; M[4] = (T)( srsp*cy-cr*sy ); M[5] = (T)( srsp*sy+cr*cy ); M[6] = (T)( sr*cp ); M[8] = (T)( crsp*cy+sr*sy ); M[9] = (T)( crsp*sy-sr*cy ); M[10] = (T)( cr*cp ); #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=false; #endif return *this; } //! Returns a rotation which (mostly) works in combination with the given scale /** This code was originally written by by Chev (assuming no scaling back then, we can be blamed for all problems added by regarding scale) */ template inline core::vector3d CMatrix4::getRotationDegrees(const vector3d& scale_) const { const CMatrix4 &mat = *this; const core::vector3d scale(core::iszero(scale_.X) ? FLT_MAX : scale_.X , core::iszero(scale_.Y) ? FLT_MAX : scale_.Y, core::iszero(scale_.Z) ? FLT_MAX : scale_.Z); const core::vector3d invScale(core::reciprocal(scale.X),core::reciprocal(scale.Y),core::reciprocal(scale.Z)); f64 Y = -asin(core::clamp(mat[2]*invScale.X, -1.0, 1.0)); const f64 C = cos(Y); Y *= RADTODEG64; f64 rotx, roty, X, Z; if (!core::iszero((T)C)) { const f64 invC = core::reciprocal(C); rotx = mat[10] * invC * invScale.Z; roty = mat[6] * invC * invScale.Y; X = atan2( roty, rotx ) * RADTODEG64; rotx = mat[0] * invC * invScale.X; roty = mat[1] * invC * invScale.X; Z = atan2( roty, rotx ) * RADTODEG64; } else { X = 0.0; rotx = mat[5] * invScale.Y; roty = -mat[4] * invScale.Y; Z = atan2( roty, rotx ) * RADTODEG64; } // fix values that get below zero if (X < 0.0) X += 360.0; if (Y < 0.0) Y += 360.0; if (Z < 0.0) Z += 360.0; return vector3d((T)X,(T)Y,(T)Z); } //! Returns a rotation that is equivalent to that set by setRotationDegrees(). template inline core::vector3d CMatrix4::getRotationDegrees() const { // Note: Using getScale() here make it look like it could do matrix decomposition. // It can't! It works (or should work) as long as rotation doesn't flip the handedness // aka scale swapping 1 or 3 axes. (I think we could catch that as well by comparing // cross product of first 2 axes to direction of third axis, but TODO) // And maybe it should also offer the solution for the simple calculation // without regarding scaling as Irrlicht did before 1.7 core::vector3d scale(getScale()); // We assume the matrix uses rotations instead of negative scaling 2 axes. // Otherwise it fails even for some simple cases, like rotating around // 2 axes by 180° which getScale thinks is a negative scaling. if (scale.Y<0 && scale.Z<0) { scale.Y =-scale.Y; scale.Z =-scale.Z; } else if (scale.X<0 && scale.Z<0) { scale.X =-scale.X; scale.Z =-scale.Z; } else if (scale.X<0 && scale.Y<0) { scale.X =-scale.X; scale.Y =-scale.Y; } return getRotationDegrees(scale); } //! Sets matrix to rotation matrix of inverse angles given as parameters template inline CMatrix4& CMatrix4::setInverseRotationRadians( const vector3d& rotation ) { f64 cr = cos( rotation.X ); f64 sr = sin( rotation.X ); f64 cp = cos( rotation.Y ); f64 sp = sin( rotation.Y ); f64 cy = cos( rotation.Z ); f64 sy = sin( rotation.Z ); M[0] = (T)( cp*cy ); M[4] = (T)( cp*sy ); M[8] = (T)( -sp ); f64 srsp = sr*sp; f64 crsp = cr*sp; M[1] = (T)( srsp*cy-cr*sy ); M[5] = (T)( srsp*sy+cr*cy ); M[9] = (T)( sr*cp ); M[2] = (T)( crsp*cy+sr*sy ); M[6] = (T)( crsp*sy-sr*cy ); M[10] = (T)( cr*cp ); #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=false; #endif return *this; } //! Sets matrix to rotation matrix defined by axis and angle, assuming LH rotation template inline CMatrix4& CMatrix4::setRotationAxisRadians( const T& angle, const vector3d& axis ) { const f64 c = cos(angle); const f64 s = sin(angle); const f64 t = 1.0 - c; const f64 tx = t * axis.X; const f64 ty = t * axis.Y; const f64 tz = t * axis.Z; const f64 sx = s * axis.X; const f64 sy = s * axis.Y; const f64 sz = s * axis.Z; M[0] = (T)(tx * axis.X + c); M[1] = (T)(tx * axis.Y + sz); M[2] = (T)(tx * axis.Z - sy); M[4] = (T)(ty * axis.X - sz); M[5] = (T)(ty * axis.Y + c); M[6] = (T)(ty * axis.Z + sx); M[8] = (T)(tz * axis.X + sy); M[9] = (T)(tz * axis.Y - sx); M[10] = (T)(tz * axis.Z + c); #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=false; #endif return *this; } /*! */ template inline CMatrix4& CMatrix4::makeIdentity() { memset(M, 0, 16*sizeof(T)); M[0] = M[5] = M[10] = M[15] = (T)1; #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=true; #endif return *this; } /* check identity with epsilon solve floating range problems.. */ template inline bool CMatrix4::isIdentity() const { #if defined ( USE_MATRIX_TEST ) if (definitelyIdentityMatrix) return true; #endif if (!core::equals( M[12], (T)0 ) || !core::equals( M[13], (T)0 ) || !core::equals( M[14], (T)0 ) || !core::equals( M[15], (T)1 )) return false; if (!core::equals( M[ 0], (T)1 ) || !core::equals( M[ 1], (T)0 ) || !core::equals( M[ 2], (T)0 ) || !core::equals( M[ 3], (T)0 )) return false; if (!core::equals( M[ 4], (T)0 ) || !core::equals( M[ 5], (T)1 ) || !core::equals( M[ 6], (T)0 ) || !core::equals( M[ 7], (T)0 )) return false; if (!core::equals( M[ 8], (T)0 ) || !core::equals( M[ 9], (T)0 ) || !core::equals( M[10], (T)1 ) || !core::equals( M[11], (T)0 )) return false; /* if (!core::equals( M[ 0], (T)1 ) || !core::equals( M[ 5], (T)1 ) || !core::equals( M[10], (T)1 ) || !core::equals( M[15], (T)1 )) return false; for (s32 i=0; i<4; ++i) for (s32 j=0; j<4; ++j) if ((j != i) && (!iszero((*this)(i,j)))) return false; */ #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=true; #endif return true; } /* Check orthogonality of matrix. */ template inline bool CMatrix4::isOrthogonal() const { T dp=M[0] * M[4 ] + M[1] * M[5 ] + M[2 ] * M[6 ] + M[3 ] * M[7 ]; if (!iszero(dp)) return false; dp = M[0] * M[8 ] + M[1] * M[9 ] + M[2 ] * M[10] + M[3 ] * M[11]; if (!iszero(dp)) return false; dp = M[0] * M[12] + M[1] * M[13] + M[2 ] * M[14] + M[3 ] * M[15]; if (!iszero(dp)) return false; dp = M[4] * M[8 ] + M[5] * M[9 ] + M[6 ] * M[10] + M[7 ] * M[11]; if (!iszero(dp)) return false; dp = M[4] * M[12] + M[5] * M[13] + M[6 ] * M[14] + M[7 ] * M[15]; if (!iszero(dp)) return false; dp = M[8] * M[12] + M[9] * M[13] + M[10] * M[14] + M[11] * M[15]; return (iszero(dp)); } /* doesn't solve floating range problems.. but takes care on +/- 0 on translation because we are changing it.. reducing floating point branches but it needs the floats in memory.. */ template inline bool CMatrix4::isIdentity_integer_base() const { #if defined ( USE_MATRIX_TEST ) if (definitelyIdentityMatrix) return true; #endif if(IR(M[0])!=F32_VALUE_1) return false; if(IR(M[1])!=0) return false; if(IR(M[2])!=0) return false; if(IR(M[3])!=0) return false; if(IR(M[4])!=0) return false; if(IR(M[5])!=F32_VALUE_1) return false; if(IR(M[6])!=0) return false; if(IR(M[7])!=0) return false; if(IR(M[8])!=0) return false; if(IR(M[9])!=0) return false; if(IR(M[10])!=F32_VALUE_1) return false; if(IR(M[11])!=0) return false; if(IR(M[12])!=0) return false; if(IR(M[13])!=0) return false; if(IR(M[13])!=0) return false; if(IR(M[15])!=F32_VALUE_1) return false; #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=true; #endif return true; } template inline void CMatrix4::rotateVect( vector3df& vect ) const { vector3d tmp(static_cast(vect.X), static_cast(vect.Y), static_cast(vect.Z)); vect.X = static_cast(tmp.X*M[0] + tmp.Y*M[4] + tmp.Z*M[8]); vect.Y = static_cast(tmp.X*M[1] + tmp.Y*M[5] + tmp.Z*M[9]); vect.Z = static_cast(tmp.X*M[2] + tmp.Y*M[6] + tmp.Z*M[10]); } //! An alternate transform vector method, writing into a second vector template inline void CMatrix4::rotateVect(core::vector3df& out, const core::vector3df& in) const { out.X = in.X*M[0] + in.Y*M[4] + in.Z*M[8]; out.Y = in.X*M[1] + in.Y*M[5] + in.Z*M[9]; out.Z = in.X*M[2] + in.Y*M[6] + in.Z*M[10]; } //! An alternate transform vector method, writing into an array of 3 floats template inline void CMatrix4::rotateVect(T *out, const core::vector3df& in) const { out[0] = in.X*M[0] + in.Y*M[4] + in.Z*M[8]; out[1] = in.X*M[1] + in.Y*M[5] + in.Z*M[9]; out[2] = in.X*M[2] + in.Y*M[6] + in.Z*M[10]; } template inline void CMatrix4::inverseRotateVect( vector3df& vect ) const { vector3d tmp(static_cast(vect.X), static_cast(vect.Y), static_cast(vect.Z)); vect.X = static_cast(tmp.X*M[0] + tmp.Y*M[1] + tmp.Z*M[2]); vect.Y = static_cast(tmp.X*M[4] + tmp.Y*M[5] + tmp.Z*M[6]); vect.Z = static_cast(tmp.X*M[8] + tmp.Y*M[9] + tmp.Z*M[10]); } template inline void CMatrix4::transformVect( vector3df& vect) const { T vector[3]; vector[0] = vect.X*M[0] + vect.Y*M[4] + vect.Z*M[8] + M[12]; vector[1] = vect.X*M[1] + vect.Y*M[5] + vect.Z*M[9] + M[13]; vector[2] = vect.X*M[2] + vect.Y*M[6] + vect.Z*M[10] + M[14]; vect.X = static_cast(vector[0]); vect.Y = static_cast(vector[1]); vect.Z = static_cast(vector[2]); } template inline void CMatrix4::transformVect( vector3df& out, const vector3df& in) const { out.X = in.X*M[0] + in.Y*M[4] + in.Z*M[8] + M[12]; out.Y = in.X*M[1] + in.Y*M[5] + in.Z*M[9] + M[13]; out.Z = in.X*M[2] + in.Y*M[6] + in.Z*M[10] + M[14]; } template inline void CMatrix4::transformVect(T *out, const core::vector3df &in) const { out[0] = in.X*M[0] + in.Y*M[4] + in.Z*M[8] + M[12]; out[1] = in.X*M[1] + in.Y*M[5] + in.Z*M[9] + M[13]; out[2] = in.X*M[2] + in.Y*M[6] + in.Z*M[10] + M[14]; out[3] = in.X*M[3] + in.Y*M[7] + in.Z*M[11] + M[15]; } template inline void CMatrix4::transformVec3(T *out, const T * in) const { out[0] = in[0]*M[0] + in[1]*M[4] + in[2]*M[8] + M[12]; out[1] = in[0]*M[1] + in[1]*M[5] + in[2]*M[9] + M[13]; out[2] = in[0]*M[2] + in[1]*M[6] + in[2]*M[10] + M[14]; } template inline void CMatrix4::transformVec4(T *out, const T * in) const { out[0] = in[0]*M[0] + in[1]*M[4] + in[2]*M[8] + in[3]*M[12]; out[1] = in[0]*M[1] + in[1]*M[5] + in[2]*M[9] + in[3]*M[13]; out[2] = in[0]*M[2] + in[1]*M[6] + in[2]*M[10] + in[3]*M[14]; out[3] = in[0]*M[3] + in[1]*M[7] + in[2]*M[11] + in[3]*M[15]; } //! Transforms a plane by this matrix template inline void CMatrix4::transformPlane( core::plane3d &plane) const { vector3df member; // Transform the plane member point, i.e. rotate, translate and scale it. transformVect(member, plane.getMemberPoint()); // Transform the normal by the transposed inverse of the matrix CMatrix4 transposedInverse(*this, EM4CONST_INVERSE_TRANSPOSED); vector3df normal = plane.Normal; transposedInverse.rotateVect(normal); plane.setPlane(member, normal.normalize()); } //! Transforms a plane by this matrix template inline void CMatrix4::transformPlane( const core::plane3d &in, core::plane3d &out) const { out = in; transformPlane( out ); } //! Transforms the edge-points of a bounding box //! Deprecated as it's usually not what people need (regards only 2 corners, but other corners might be outside the box after transformation) //! Use transformBoxEx instead. template IRR_DEPRECATED inline void CMatrix4::transformBox(core::aabbox3d& box) const { #if defined ( USE_MATRIX_TEST ) if (isIdentity()) return; #endif transformVect(box.MinEdge); transformVect(box.MaxEdge); box.repair(); } //! Transforms a axis aligned bounding box more accurately than transformBox() template inline void CMatrix4::transformBoxEx(core::aabbox3d& box) const { #if defined ( USE_MATRIX_TEST ) if (isIdentity()) return; #endif const f32 Amin[3] = {box.MinEdge.X, box.MinEdge.Y, box.MinEdge.Z}; const f32 Amax[3] = {box.MaxEdge.X, box.MaxEdge.Y, box.MaxEdge.Z}; f32 Bmin[3]; f32 Bmax[3]; Bmin[0] = Bmax[0] = M[12]; Bmin[1] = Bmax[1] = M[13]; Bmin[2] = Bmax[2] = M[14]; const CMatrix4 &m = *this; for (u32 i = 0; i < 3; ++i) { for (u32 j = 0; j < 3; ++j) { const f32 a = m(j,i) * Amin[j]; const f32 b = m(j,i) * Amax[j]; if (a < b) { Bmin[i] += a; Bmax[i] += b; } else { Bmin[i] += b; Bmax[i] += a; } } } box.MinEdge.X = Bmin[0]; box.MinEdge.Y = Bmin[1]; box.MinEdge.Z = Bmin[2]; box.MaxEdge.X = Bmax[0]; box.MaxEdge.Y = Bmax[1]; box.MaxEdge.Z = Bmax[2]; } //! Multiplies this matrix by a 1x4 matrix template inline void CMatrix4::multiplyWith1x4Matrix(T* matrix) const { /* 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 */ T mat[4]; mat[0] = matrix[0]; mat[1] = matrix[1]; mat[2] = matrix[2]; mat[3] = matrix[3]; matrix[0] = M[0]*mat[0] + M[4]*mat[1] + M[8]*mat[2] + M[12]*mat[3]; matrix[1] = M[1]*mat[0] + M[5]*mat[1] + M[9]*mat[2] + M[13]*mat[3]; matrix[2] = M[2]*mat[0] + M[6]*mat[1] + M[10]*mat[2] + M[14]*mat[3]; matrix[3] = M[3]*mat[0] + M[7]*mat[1] + M[11]*mat[2] + M[15]*mat[3]; } template inline void CMatrix4::inverseTranslateVect( vector3df& vect ) const { vect.X = vect.X-M[12]; vect.Y = vect.Y-M[13]; vect.Z = vect.Z-M[14]; } template inline void CMatrix4::translateVect( vector3df& vect ) const { vect.X = vect.X+M[12]; vect.Y = vect.Y+M[13]; vect.Z = vect.Z+M[14]; } template inline bool CMatrix4::getInverse(CMatrix4& out) const { /// Calculates the inverse of this Matrix /// The inverse is calculated using Cramers rule. /// If no inverse exists then 'false' is returned. #if defined ( USE_MATRIX_TEST ) if ( this->isIdentity() ) { out=*this; return true; } #endif const CMatrix4 &m = *this; f32 d = (m[0] * m[5] - m[1] * m[4]) * (m[10] * m[15] - m[11] * m[14]) - (m[0] * m[6] - m[2] * m[4]) * (m[9] * m[15] - m[11] * m[13]) + (m[0] * m[7] - m[3] * m[4]) * (m[9] * m[14] - m[10] * m[13]) + (m[1] * m[6] - m[2] * m[5]) * (m[8] * m[15] - m[11] * m[12]) - (m[1] * m[7] - m[3] * m[5]) * (m[8] * m[14] - m[10] * m[12]) + (m[2] * m[7] - m[3] * m[6]) * (m[8] * m[13] - m[9] * m[12]); if( core::iszero ( d, FLT_MIN ) ) return false; d = core::reciprocal ( d ); out[0] = d * (m[5] * (m[10] * m[15] - m[11] * m[14]) + m[6] * (m[11] * m[13] - m[9] * m[15]) + m[7] * (m[9] * m[14] - m[10] * m[13])); out[1] = d * (m[9] * (m[2] * m[15] - m[3] * m[14]) + m[10] * (m[3] * m[13] - m[1] * m[15]) + m[11] * (m[1] * m[14] - m[2] * m[13])); out[2] = d * (m[13] * (m[2] * m[7] - m[3] * m[6]) + m[14] * (m[3] * m[5] - m[1] * m[7]) + m[15] * (m[1] * m[6] - m[2] * m[5])); out[3] = d * (m[1] * (m[7] * m[10] - m[6] * m[11]) + m[2] * (m[5] * m[11] - m[7] * m[9]) + m[3] * (m[6] * m[9] - m[5] * m[10])); out[4] = d * (m[6] * (m[8] * m[15] - m[11] * m[12]) + m[7] * (m[10] * m[12] - m[8] * m[14]) + m[4] * (m[11] * m[14] - m[10] * m[15])); out[5] = d * (m[10] * (m[0] * m[15] - m[3] * m[12]) + m[11] * (m[2] * m[12] - m[0] * m[14]) + m[8] * (m[3] * m[14] - m[2] * m[15])); out[6] = d * (m[14] * (m[0] * m[7] - m[3] * m[4]) + m[15] * (m[2] * m[4] - m[0] * m[6]) + m[12] * (m[3] * m[6] - m[2] * m[7])); out[7] = d * (m[2] * (m[7] * m[8] - m[4] * m[11]) + m[3] * (m[4] * m[10] - m[6] * m[8]) + m[0] * (m[6] * m[11] - m[7] * m[10])); out[8] = d * (m[7] * (m[8] * m[13] - m[9] * m[12]) + m[4] * (m[9] * m[15] - m[11] * m[13]) + m[5] * (m[11] * m[12] - m[8] * m[15])); out[9] = d * (m[11] * (m[0] * m[13] - m[1] * m[12]) + m[8] * (m[1] * m[15] - m[3] * m[13]) + m[9] * (m[3] * m[12] - m[0] * m[15])); out[10] = d * (m[15] * (m[0] * m[5] - m[1] * m[4]) + m[12] * (m[1] * m[7] - m[3] * m[5]) + m[13] * (m[3] * m[4] - m[0] * m[7])); out[11] = d * (m[3] * (m[5] * m[8] - m[4] * m[9]) + m[0] * (m[7] * m[9] - m[5] * m[11]) + m[1] * (m[4] * m[11] - m[7] * m[8])); out[12] = d * (m[4] * (m[10] * m[13] - m[9] * m[14]) + m[5] * (m[8] * m[14] - m[10] * m[12]) + m[6] * (m[9] * m[12] - m[8] * m[13])); out[13] = d * (m[8] * (m[2] * m[13] - m[1] * m[14]) + m[9] * (m[0] * m[14] - m[2] * m[12]) + m[10] * (m[1] * m[12] - m[0] * m[13])); out[14] = d * (m[12] * (m[2] * m[5] - m[1] * m[6]) + m[13] * (m[0] * m[6] - m[2] * m[4]) + m[14] * (m[1] * m[4] - m[0] * m[5])); out[15] = d * (m[0] * (m[5] * m[10] - m[6] * m[9]) + m[1] * (m[6] * m[8] - m[4] * m[10]) + m[2] * (m[4] * m[9] - m[5] * m[8])); #if defined ( USE_MATRIX_TEST ) out.definitelyIdentityMatrix = definitelyIdentityMatrix; #endif return true; } //! Inverts a primitive matrix which only contains a translation and a rotation //! \param out: where result matrix is written to. template inline bool CMatrix4::getInversePrimitive ( CMatrix4& out ) const { out.M[0 ] = M[0]; out.M[1 ] = M[4]; out.M[2 ] = M[8]; out.M[3 ] = 0; out.M[4 ] = M[1]; out.M[5 ] = M[5]; out.M[6 ] = M[9]; out.M[7 ] = 0; out.M[8 ] = M[2]; out.M[9 ] = M[6]; out.M[10] = M[10]; out.M[11] = 0; out.M[12] = (T)-(M[12]*M[0] + M[13]*M[1] + M[14]*M[2]); out.M[13] = (T)-(M[12]*M[4] + M[13]*M[5] + M[14]*M[6]); out.M[14] = (T)-(M[12]*M[8] + M[13]*M[9] + M[14]*M[10]); out.M[15] = 1; #if defined ( USE_MATRIX_TEST ) out.definitelyIdentityMatrix = definitelyIdentityMatrix; #endif return true; } /*! */ template inline bool CMatrix4::makeInverse() { #if defined ( USE_MATRIX_TEST ) if (definitelyIdentityMatrix) return true; #endif CMatrix4 temp ( EM4CONST_NOTHING ); if (getInverse(temp)) { *this = temp; return true; } return false; } template inline CMatrix4& CMatrix4::operator=(const CMatrix4 &other) { if (this==&other) return *this; memcpy(M, other.M, 16*sizeof(T)); #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=other.definitelyIdentityMatrix; #endif return *this; } template inline CMatrix4& CMatrix4::operator=(const T& scalar) { for (s32 i = 0; i < 16; ++i) M[i]=scalar; #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=false; #endif return *this; } template inline bool CMatrix4::operator==(const CMatrix4 &other) const { #if defined ( USE_MATRIX_TEST ) if (definitelyIdentityMatrix && other.definitelyIdentityMatrix) return true; #endif for (s32 i = 0; i < 16; ++i) if (M[i] != other.M[i]) return false; return true; } template inline bool CMatrix4::operator!=(const CMatrix4 &other) const { return !(*this == other); } // Builds a perspective projection matrix template inline CMatrix4& CMatrix4::buildProjectionMatrixPerspectiveFov(T sx, T sy, T zNear, T zFar, bool zClipFromZero, T zSign) { IRR_DEBUG_BREAK_IF(zNear==zFar); //divide by zero M[0] = sx; M[1] = 0; M[2] = 0; M[3] = 0; M[4] = 0; M[5] = sy; M[6] = 0; M[7] = 0; M[8] = 0; M[9] = 0; //M[10] below M[11] = zSign; M[12] = 0; M[13] = 0; //M[14] below M[15] = 0; if ( zClipFromZero ) // DirectX version { M[10] = zSign*zFar/(zFar-zNear); M[14] = (T)(zNear*zFar/(zNear-zFar)); } else // OpenGL version { M[10] = zSign*(zFar+zNear)/(zFar-zNear); M[14] = (T)(2.0f*zNear*zFar/(zNear-zFar)); } #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=false; #endif return *this; } // Builds a right-handed perspective projection matrix based on a field of view template inline CMatrix4& CMatrix4::buildProjectionMatrixPerspectiveFovRH( f32 fieldOfViewRadians, f32 aspectRatio, f32 zNear, f32 zFar, bool zClipFromZero) { const f64 sy = reciprocal(tan(fieldOfViewRadians*0.5)); IRR_DEBUG_BREAK_IF(aspectRatio==0.f); //divide by zero const T sx = static_cast(sy / aspectRatio); return buildProjectionMatrixPerspectiveFov(sx, static_cast(sy), zNear, zFar, zClipFromZero, (T)-1); } // Builds a left-handed perspective projection matrix based on a field of view template inline CMatrix4& CMatrix4::buildProjectionMatrixPerspectiveFovLH( f32 fieldOfViewRadians, f32 aspectRatio, f32 zNear, f32 zFar, bool zClipFromZero) { const f64 sy = reciprocal(tan(fieldOfViewRadians*0.5)); IRR_DEBUG_BREAK_IF(aspectRatio==0.f); //divide by zero const T sx = static_cast(sy / aspectRatio); return buildProjectionMatrixPerspectiveFov(sx, static_cast(sy), zNear, zFar, zClipFromZero, (T)1); } // Builds a left-handed perspective projection matrix based on a field of view, with far plane culling at infinity template inline CMatrix4& CMatrix4::buildProjectionMatrixPerspectiveFovInfinityLH( f32 fieldOfViewRadians, f32 aspectRatio, f32 zNear, f32 epsilon) { const f64 h = reciprocal(tan(fieldOfViewRadians*0.5)); IRR_DEBUG_BREAK_IF(aspectRatio==0.f); //divide by zero const T w = static_cast(h / aspectRatio); M[0] = w; M[1] = 0; M[2] = 0; M[3] = 0; M[4] = 0; M[5] = (T)h; M[6] = 0; M[7] = 0; M[8] = 0; M[9] = 0; M[10] = (T)(1.f-epsilon); M[11] = 1; M[12] = 0; M[13] = 0; M[14] = (T)(zNear*(epsilon-1.f)); M[15] = 0; #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=false; #endif return *this; } // Builds a left-handed orthogonal projection matrix. template inline CMatrix4& CMatrix4::buildProjectionMatrixOrthoLH( f32 widthOfViewVolume, f32 heightOfViewVolume, f32 zNear, f32 zFar, bool zClipFromZero) { IRR_DEBUG_BREAK_IF(widthOfViewVolume==0.f); //divide by zero IRR_DEBUG_BREAK_IF(heightOfViewVolume==0.f); //divide by zero IRR_DEBUG_BREAK_IF(zNear==zFar); //divide by zero M[0] = (T)(2/widthOfViewVolume); M[1] = 0; M[2] = 0; M[3] = 0; M[4] = 0; M[5] = (T)(2/heightOfViewVolume); M[6] = 0; M[7] = 0; M[8] = 0; M[9] = 0; // M[10] M[11] = 0; M[12] = 0; M[13] = 0; // M[14] M[15] = 1; if ( zClipFromZero ) { M[10] = (T)(1/(zFar-zNear)); M[14] = (T)(zNear/(zNear-zFar)); } else { M[10] = (T)(2/(zFar-zNear)); M[14] = (T)-(zFar+zNear)/(zFar-zNear); } #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=false; #endif return *this; } // Builds a right-handed orthogonal projection matrix. template inline CMatrix4& CMatrix4::buildProjectionMatrixOrthoRH( f32 widthOfViewVolume, f32 heightOfViewVolume, f32 zNear, f32 zFar, bool zClipFromZero) { IRR_DEBUG_BREAK_IF(widthOfViewVolume==0.f); //divide by zero IRR_DEBUG_BREAK_IF(heightOfViewVolume==0.f); //divide by zero IRR_DEBUG_BREAK_IF(zNear==zFar); //divide by zero M[0] = (T)(2/widthOfViewVolume); M[1] = 0; M[2] = 0; M[3] = 0; M[4] = 0; M[5] = (T)(2/heightOfViewVolume); M[6] = 0; M[7] = 0; M[8] = 0; M[9] = 0; // M[10] M[11] = 0; M[12] = 0; M[13] = 0; // M[14] M[15] = 1; if ( zClipFromZero ) { M[10] = (T)(1/(zNear-zFar)); M[14] = (T)(zNear/(zNear-zFar)); } else { M[10] = (T)(2/(zNear-zFar)); M[14] = (T)-(zFar+zNear)/(zFar-zNear); } #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=false; #endif return *this; } // Builds a right-handed perspective projection matrix. template inline CMatrix4& CMatrix4::buildProjectionMatrixPerspectiveRH( f32 widthOfViewVolume, f32 heightOfViewVolume, f32 zNear, f32 zFar, bool zClipFromZero) { IRR_DEBUG_BREAK_IF(widthOfViewVolume==0.f); //divide by zero IRR_DEBUG_BREAK_IF(heightOfViewVolume==0.f); //divide by zero const T sx = (T)(2*zNear/widthOfViewVolume); const T sy = (T)(2*zNear/heightOfViewVolume); return buildProjectionMatrixPerspectiveFov(sx, sy, zNear, zFar, zClipFromZero, (T)-1); } // Builds a left-handed perspective projection matrix. template inline CMatrix4& CMatrix4::buildProjectionMatrixPerspectiveLH( f32 widthOfViewVolume, f32 heightOfViewVolume, f32 zNear, f32 zFar, bool zClipFromZero) { IRR_DEBUG_BREAK_IF(widthOfViewVolume==0.f); //divide by zero IRR_DEBUG_BREAK_IF(heightOfViewVolume==0.f); //divide by zero const T sx = (T)(2*zNear/widthOfViewVolume); const T sy = (T)(2*zNear/heightOfViewVolume); return buildProjectionMatrixPerspectiveFov(sx, sy, zNear, zFar, zClipFromZero, (T)1); } // Builds a matrix that flattens geometry into a plane. template inline CMatrix4& CMatrix4::buildShadowMatrix(const core::vector3df& light, core::plane3df plane, f32 point) { plane.Normal.normalize(); const f32 d = plane.Normal.dotProduct(light); M[ 0] = (T)(-plane.Normal.X * light.X + d); M[ 1] = (T)(-plane.Normal.X * light.Y); M[ 2] = (T)(-plane.Normal.X * light.Z); M[ 3] = (T)(-plane.Normal.X * point); M[ 4] = (T)(-plane.Normal.Y * light.X); M[ 5] = (T)(-plane.Normal.Y * light.Y + d); M[ 6] = (T)(-plane.Normal.Y * light.Z); M[ 7] = (T)(-plane.Normal.Y * point); M[ 8] = (T)(-plane.Normal.Z * light.X); M[ 9] = (T)(-plane.Normal.Z * light.Y); M[10] = (T)(-plane.Normal.Z * light.Z + d); M[11] = (T)(-plane.Normal.Z * point); M[12] = (T)(-plane.D * light.X); M[13] = (T)(-plane.D * light.Y); M[14] = (T)(-plane.D * light.Z); M[15] = (T)(-plane.D * point + d); #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=false; #endif return *this; } // Builds a left-handed look-at matrix. template inline CMatrix4& CMatrix4::buildCameraLookAtMatrixLH( const vector3df& position, const vector3df& target, const vector3df& upVector) { vector3df zaxis = target - position; zaxis.normalize_z(); vector3df xaxis = normalize_y(upVector).crossProduct(zaxis); xaxis.normalize_x(); vector3df yaxis = zaxis.crossProduct(xaxis); M[0] = (T)xaxis.X; M[1] = (T)yaxis.X; M[2] = (T)zaxis.X; M[3] = 0; M[4] = (T)xaxis.Y; M[5] = (T)yaxis.Y; M[6] = (T)zaxis.Y; M[7] = 0; M[8] = (T)xaxis.Z; M[9] = (T)yaxis.Z; M[10] = (T)zaxis.Z; M[11] = 0; M[12] = (T)-xaxis.dotProduct(position); M[13] = (T)-yaxis.dotProduct(position); M[14] = (T)-zaxis.dotProduct(position); M[15] = 1; #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=false; #endif return *this; } // Builds a right-handed look-at matrix. template inline CMatrix4& CMatrix4::buildCameraLookAtMatrixRH( const vector3df& position, const vector3df& target, const vector3df& upVector) { vector3df zaxis = position - target; zaxis.normalize(); vector3df xaxis = upVector.crossProduct(zaxis); xaxis.normalize(); vector3df yaxis = zaxis.crossProduct(xaxis); M[0] = (T)xaxis.X; M[1] = (T)yaxis.X; M[2] = (T)zaxis.X; M[3] = 0; M[4] = (T)xaxis.Y; M[5] = (T)yaxis.Y; M[6] = (T)zaxis.Y; M[7] = 0; M[8] = (T)xaxis.Z; M[9] = (T)yaxis.Z; M[10] = (T)zaxis.Z; M[11] = 0; M[12] = (T)-xaxis.dotProduct(position); M[13] = (T)-yaxis.dotProduct(position); M[14] = (T)-zaxis.dotProduct(position); M[15] = 1; #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=false; #endif return *this; } // creates a new matrix as interpolated matrix from this and the passed one. template inline CMatrix4 CMatrix4::interpolate(const core::CMatrix4& b, f32 time) const { CMatrix4 mat ( EM4CONST_NOTHING ); for (u32 i=0; i < 16; i += 4) { mat.M[i+0] = (T)(M[i+0] + ( b.M[i+0] - M[i+0] ) * time); mat.M[i+1] = (T)(M[i+1] + ( b.M[i+1] - M[i+1] ) * time); mat.M[i+2] = (T)(M[i+2] + ( b.M[i+2] - M[i+2] ) * time); mat.M[i+3] = (T)(M[i+3] + ( b.M[i+3] - M[i+3] ) * time); } return mat; } // returns transposed matrix template inline CMatrix4 CMatrix4::getTransposed() const { CMatrix4 t ( EM4CONST_NOTHING ); getTransposed ( t ); return t; } // returns transposed matrix template inline void CMatrix4::getTransposed( CMatrix4& o ) const { o[ 0] = M[ 0]; o[ 1] = M[ 4]; o[ 2] = M[ 8]; o[ 3] = M[12]; o[ 4] = M[ 1]; o[ 5] = M[ 5]; o[ 6] = M[ 9]; o[ 7] = M[13]; o[ 8] = M[ 2]; o[ 9] = M[ 6]; o[10] = M[10]; o[11] = M[14]; o[12] = M[ 3]; o[13] = M[ 7]; o[14] = M[11]; o[15] = M[15]; #if defined ( USE_MATRIX_TEST ) o.definitelyIdentityMatrix=definitelyIdentityMatrix; #endif } // used to scale <-1,-1><1,1> to viewport template inline CMatrix4& CMatrix4::buildNDCToDCMatrix( const core::rect& viewport, f32 zScale) { const f32 scaleX = (viewport.getWidth() - 0.75f ) * 0.5f; const f32 scaleY = -(viewport.getHeight() - 0.75f ) * 0.5f; const f32 dx = -0.5f + ( (viewport.UpperLeftCorner.X + viewport.LowerRightCorner.X ) * 0.5f ); const f32 dy = -0.5f + ( (viewport.UpperLeftCorner.Y + viewport.LowerRightCorner.Y ) * 0.5f ); makeIdentity(); M[12] = (T)dx; M[13] = (T)dy; return setScale(core::vector3d((T)scaleX, (T)scaleY, (T)zScale)); } //! Builds a matrix that rotates from one vector to another /** \param from: vector to rotate from \param to: vector to rotate to http://www.euclideanspace.com/maths/geometry/rotations/conversions/angleToMatrix/index.htm */ template inline CMatrix4& CMatrix4::buildRotateFromTo(const core::vector3df& from, const core::vector3df& to) { // unit vectors core::vector3df f(from); core::vector3df t(to); f.normalize(); t.normalize(); // axis multiplication by sin core::vector3df vs(t.crossProduct(f)); // axis of rotation core::vector3df v(vs); v.normalize(); // cosine angle T ca = f.dotProduct(t); core::vector3df vt(v * (1 - ca)); M[0] = vt.X * v.X + ca; M[5] = vt.Y * v.Y + ca; M[10] = vt.Z * v.Z + ca; vt.X *= v.Y; vt.Z *= v.X; vt.Y *= v.Z; M[1] = vt.X - vs.Z; M[2] = vt.Z + vs.Y; M[3] = 0; M[4] = vt.X + vs.Z; M[6] = vt.Y - vs.X; M[7] = 0; M[8] = vt.Z - vs.Y; M[9] = vt.Y + vs.X; M[11] = 0; M[12] = 0; M[13] = 0; M[14] = 0; M[15] = 1; return *this; } //! Builds a matrix which rotates a source vector to a look vector over an arbitrary axis /** \param camPos: viewer position in world coord \param center: object position in world-coord, rotation pivot \param translation: object final translation from center \param axis: axis to rotate about \param from: source vector to rotate from */ template inline void CMatrix4::buildAxisAlignedBillboard( const core::vector3df& camPos, const core::vector3df& center, const core::vector3df& translation, const core::vector3df& axis, const core::vector3df& from) { // axis of rotation core::vector3df up = axis; up.normalize(); const core::vector3df forward = (camPos - center).normalize(); const core::vector3df right = up.crossProduct(forward).normalize(); // correct look vector const core::vector3df look = right.crossProduct(up); // rotate from to // axis multiplication by sin const core::vector3df vs = look.crossProduct(from); // cosine angle const f32 ca = from.dotProduct(look); core::vector3df vt(up * (1.f - ca)); M[0] = static_cast(vt.X * up.X + ca); M[5] = static_cast(vt.Y * up.Y + ca); M[10] = static_cast(vt.Z * up.Z + ca); vt.X *= up.Y; vt.Z *= up.X; vt.Y *= up.Z; M[1] = static_cast(vt.X - vs.Z); M[2] = static_cast(vt.Z + vs.Y); M[3] = 0; M[4] = static_cast(vt.X + vs.Z); M[6] = static_cast(vt.Y - vs.X); M[7] = 0; M[8] = static_cast(vt.Z - vs.Y); M[9] = static_cast(vt.Y + vs.X); M[11] = 0; setRotationCenter(center, translation); } //! Builds a combined matrix which translate to a center before rotation and translate afterward template inline void CMatrix4::setRotationCenter(const core::vector3df& center, const core::vector3df& translation) { M[12] = -M[0]*center.X - M[4]*center.Y - M[8]*center.Z + (center.X - translation.X ); M[13] = -M[1]*center.X - M[5]*center.Y - M[9]*center.Z + (center.Y - translation.Y ); M[14] = -M[2]*center.X - M[6]*center.Y - M[10]*center.Z + (center.Z - translation.Z ); M[15] = (T) 1.0; #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=false; #endif } /*! Generate texture coordinates as linear functions so that: u = Ux*x + Uy*y + Uz*z + Uw v = Vx*x + Vy*y + Vz*z + Vw The matrix M for this case is: Ux Vx 0 0 Uy Vy 0 0 Uz Vz 0 0 Uw Vw 0 0 */ template inline CMatrix4& CMatrix4::buildTextureTransform( f32 rotateRad, const core::vector2df &rotatecenter, const core::vector2df &translate, const core::vector2df &scale) { const f32 c = cosf(rotateRad); const f32 s = sinf(rotateRad); M[0] = (T)(c * scale.X); M[1] = (T)(s * scale.Y); M[2] = 0; M[3] = 0; M[4] = (T)(-s * scale.X); M[5] = (T)(c * scale.Y); M[6] = 0; M[7] = 0; M[8] = (T)(c * scale.X * rotatecenter.X + -s * rotatecenter.Y + translate.X); M[9] = (T)(s * scale.Y * rotatecenter.X + c * rotatecenter.Y + translate.Y); M[10] = 1; M[11] = 0; M[12] = 0; M[13] = 0; M[14] = 0; M[15] = 1; #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=false; #endif return *this; } // rotate about z axis, center ( 0.5, 0.5 ) template inline CMatrix4& CMatrix4::setTextureRotationCenter( f32 rotateRad ) { const f32 c = cosf(rotateRad); const f32 s = sinf(rotateRad); M[0] = (T)c; M[1] = (T)s; M[4] = (T)-s; M[5] = (T)c; M[8] = (T)(0.5f * ( s - c) + 0.5f); M[9] = (T)(-0.5f * ( s + c) + 0.5f); #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix = definitelyIdentityMatrix && (rotateRad==0.0f); #endif return *this; } template inline CMatrix4& CMatrix4::setTextureTranslate ( f32 x, f32 y ) { M[8] = (T)x; M[9] = (T)y; #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix = definitelyIdentityMatrix && (x==0.0f) && (y==0.0f); #endif return *this; } template inline void CMatrix4::getTextureTranslate(f32& x, f32& y) const { x = (f32)M[8]; y = (f32)M[9]; } template inline CMatrix4& CMatrix4::setTextureTranslateTransposed ( f32 x, f32 y ) { M[2] = (T)x; M[6] = (T)y; #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix = definitelyIdentityMatrix && (x==0.0f) && (y==0.0f); #endif return *this; } template inline CMatrix4& CMatrix4::setTextureScale ( f32 sx, f32 sy ) { M[0] = (T)sx; M[5] = (T)sy; #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix = definitelyIdentityMatrix && (sx==1.0f) && (sy==1.0f); #endif return *this; } template inline void CMatrix4::getTextureScale ( f32& sx, f32& sy ) const { sx = (f32)M[0]; sy = (f32)M[5]; } template inline CMatrix4& CMatrix4::setTextureScaleCenter( f32 sx, f32 sy ) { M[0] = (T)sx; M[5] = (T)sy; M[8] = (T)(0.5f - 0.5f * sx); M[9] = (T)(0.5f - 0.5f * sy); #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix = definitelyIdentityMatrix && (sx==1.0f) && (sy==1.0f); #endif return *this; } // sets all matrix data members at once template inline CMatrix4& CMatrix4::setM(const T* data) { memcpy(M,data, 16*sizeof(T)); #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix=false; #endif return *this; } // sets if the matrix is definitely identity matrix template inline void CMatrix4::setDefinitelyIdentityMatrix( bool isDefinitelyIdentityMatrix) { #if defined ( USE_MATRIX_TEST ) definitelyIdentityMatrix = isDefinitelyIdentityMatrix; #else (void)isDefinitelyIdentityMatrix; // prevent compiler warning #endif } // gets if the matrix is definitely identity matrix template inline bool CMatrix4::getDefinitelyIdentityMatrix() const { #if defined ( USE_MATRIX_TEST ) return definitelyIdentityMatrix; #else return false; #endif } //! Compare two matrices using the equal method template inline bool CMatrix4::equals(const core::CMatrix4& other, const T tolerance) const { #if defined ( USE_MATRIX_TEST ) if (definitelyIdentityMatrix && other.definitelyIdentityMatrix) return true; #endif for (s32 i = 0; i < 16; ++i) if (!core::equals(M[i],other.M[i], tolerance)) return false; return true; } // Multiply by scalar. template inline CMatrix4 operator*(const T scalar, const CMatrix4& mat) { return mat*scalar; } //! Typedef for f32 matrix typedef CMatrix4 matrix4; //! global const identity matrix IRRLICHT_API extern const matrix4 IdentityMatrix; } // end namespace core } // end namespace irr #endif