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Allow nodes ignoring parent transformations with ESNUA_RELATIVE

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New AbsPosUpdateBehavior which makes updateAbsolutePosition calls behave as if a node had no parent.
Allows for micro optimizations in cases where we have non-moving root node (all scenenodes are always added to the SceneManager which is generally not moved but it's transformation is still multiplied each frame for each node)
As a side-effect this also allows abusing the SceneManager to group objects without affecting transformations.
No real extra cost since I added ESNUA_TRANSFORM_POSITION already.
Thought turns out those matrix transformations are so fast that I also didn't noticed any difference in tests with > 20.000 nodes.


git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@6481 dfc29bdd-3216-0410-991c-e03cc46cb475
This commit is contained in:
cutealien 2023-05-02 16:05:22 +00:00
parent 1b4912fcc4
commit 04d814ee31
3 changed files with 19 additions and 6 deletions
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7
include/ESceneNodeUpdateAbs.h
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@ -17,7 +17,11 @@ namespace scene
//! Only transform the position of the node transformation matrix //! Only transform the position of the node transformation matrix
//! by the parent transformation matrix. //! by the parent transformation matrix.
//! Parent will not affect the rotation/scale of the node transformation. //! Parent will not affect the rotation/scale of the node transformation.
ESNUA_TRANSFORM_POSITION ESNUA_TRANSFORM_POSITION,
//! Use the relative matrix as absolute transformation matrix
//! Parent node transformation is ignored just like when the parent is set to 0
ESNUA_RELATIVE
}; };
//! Names for culling type //! Names for culling type
@ -25,6 +29,7 @@ namespace scene
{ {
"matrix", "matrix",
"pos", "pos",
"relative",
0 0
}; };

16
include/ISceneNode.h
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@ -79,7 +79,7 @@ namespace scene
//! This method is called just before the rendering process of the whole scene. //! This method is called just before the rendering process of the whole scene.
/** Nodes may register themselves in the render pipeline during this call, /** Nodes may register themselves in the render pipeline during this call,
precalculate the geometry which should be rendered, and prevent their pre-calculate the geometry which should be rendered, and prevent their
children from being able to register themselves if they are clipped by simply children from being able to register themselves if they are clipped by simply
not calling their OnRegisterSceneNode method. not calling their OnRegisterSceneNode method.
If you are implementing your own scene node, you should overwrite this method If you are implementing your own scene node, you should overwrite this method
@ -543,7 +543,7 @@ namespace scene
//! Set a culling style or disable culling completely. //! Set a culling style or disable culling completely.
/** Box cullling (EAC_BOX) is set by default. Note that not /** Box culling (EAC_BOX) is set by default. Note that not
all SceneNodes support culling and that some nodes always cull all SceneNodes support culling and that some nodes always cull
their geometry because it is their only reason for existence, their geometry because it is their only reason for existence,
for example the OctreeSceneNode. for example the OctreeSceneNode.
@ -682,16 +682,24 @@ namespace scene
{ {
if (Parent) if (Parent)
{ {
if ( AbsPosUpdateBehavior == ESNUA_TRANSFORM_MATRIX ) switch ( AbsPosUpdateBehavior )
{
case ESNUA_TRANSFORM_MATRIX:
{ {
AbsoluteTransformation = AbsoluteTransformation =
Parent->getAbsoluteTransformation() * getRelativeTransformation(); Parent->getAbsoluteTransformation() * getRelativeTransformation();
} }
else if ( AbsPosUpdateBehavior == ESNUA_TRANSFORM_POSITION ) break;
case ESNUA_TRANSFORM_POSITION:
{ {
AbsoluteTransformation = getRelativeTransformation(); AbsoluteTransformation = getRelativeTransformation();
Parent->getAbsoluteTransformation().transformVect(reinterpret_cast<irr::core::vector3df&>(AbsoluteTransformation[12])); Parent->getAbsoluteTransformation().transformVect(reinterpret_cast<irr::core::vector3df&>(AbsoluteTransformation[12]));
} }
break;
case ESNUA_RELATIVE:
AbsoluteTransformation = getRelativeTransformation();
break;
}
} }
else else
AbsoluteTransformation = getRelativeTransformation(); AbsoluteTransformation = getRelativeTransformation();

2
tests/tests-last-passed-at.txt
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@ -1,4 +1,4 @@
Tests finished. 72 tests of 72 passed. Tests finished. 72 tests of 72 passed.
Compiled as DEBUG Compiled as DEBUG
Test suite pass at GMT Fri Apr 28 17:44:32 2023 Test suite pass at GMT Tue May 02 15:59:37 2023