Add SMaterialLayer::hasSetTextureMatrix and SMaterialLayer::resetTextureMatrix

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@6479 dfc29bdd-3216-0410-991c-e03cc46cb475

changes.txt

@@ -1,6 +1,7 @@
 --------------------------
 Changes in 1.9 (not yet released)
 
+- Add SMaterialLayer::hasSetTextureMatrix and SMaterialLayer::resetTextureMatrix
 - Add IShaderConstantSetCallBack::OnCreate to allow earlier access to IMaterialRendererServices
 - CIrrDeviceWin32::yield() now uses Sleep(0) instead of Sleep(1). 
   We had Sleep(1) to allow yielding to all processes back in Windows XP time.

include/SMaterialLayer.h

@@ -45,7 +45,7 @@ namespace video
 			"texture_clamp_mirror_clamp_to_border", 0};
 
 	//! Struct for holding material parameters which exist per texture layer
-	// Note for implementors: Serialization is in CNullDriver
+	// Note for implementers: Serialization is in CNullDriver
 	class SMaterialLayer
 	{
 	public:
@@ -153,6 +153,25 @@ namespace video
 				*TextureMatrix = mat;
 		}
 
+		//! Check if we have set a custom texture matrix
+		//! Note that otherwise we get an IdentityMatrix as default
+		inline bool hasSetTextureMatrix() const
+		{
+			return TextureMatrix != 0;
+		}
+
+		//! Reset texture matrix to identity matrix
+		//! Releases memory, which is expensive, but ver rarely useful for optimizations
+		void resetTextureMatrix()
+		{
+			if ( TextureMatrix )
+			{
+				MatrixAllocator.destruct(TextureMatrix);
+				MatrixAllocator.deallocate(TextureMatrix);
+				TextureMatrix = 0;
+			}
+		}
+
 		//! Inequality operator
 		/** \param b Layer to compare to.
 		\return True if layers are different, else false. */

tests/tests-last-passed-at.txt

@@ -1,4 +1,4 @@
 Tests finished. 72 tests of 72 passed.
 Compiled as DEBUG
-Test suite pass at GMT Fri Apr 21 14:37:22 2023
+Test suite pass at GMT Fri Apr 28 17:44:32 2023