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Inline common vector/matrix operations, for performance.

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Remove some redundant vector methods.
Compute skinning for positions and normals simultaneously.
(These changes reduce skinning cost by >50%.)

This was SVN commit r8170.
This commit is contained in:
Ykkrosh
2010-09-24 16:54:20 +00:00
parent 46b79f8a6d
commit ede71ea791
9 changed files with 157 additions and 158 deletions
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source/graphics/ModelDef.cpp
+41 -1
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@@ -1,4 +1,4 @@
/* Copyright (C) 2009 Wildfire Games.
/* Copyright (C) 2010 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. is free software: you can redistribute it and/or modify
@@ -89,6 +89,46 @@ CVector3D CModelDef::SkinNormal(const SModelVertex& vtx,
return result;
}
void CModelDef::SkinPointsAndNormals(
size_t numVertices,
const VertexArrayIterator<CVector3D>& Position,
const VertexArrayIterator<CVector3D>& Normal,
const SModelVertex* vertices,
const CMatrix3D newPoseMatrices[],
const CMatrix3D inverseBindMatrices[])
{
for (size_t j = 0; j < numVertices; ++j)
{
const SModelVertex vtx = vertices[j];
CVector3D pos(0, 0, 0);
CVector3D normal(0, 0, 0);
for (int i = 0; i < SVertexBlend::SIZE && vtx.m_Blend.m_Bone[i] != 0xff; ++i)
{
CVector3D posBindSpace = inverseBindMatrices[vtx.m_Blend.m_Bone[i]].Transform(vtx.m_Coords);
CVector3D normBindSpace = inverseBindMatrices[vtx.m_Blend.m_Bone[i]].Rotate(vtx.m_Norm);
CVector3D posWorldSpace = newPoseMatrices[vtx.m_Blend.m_Bone[i]].Transform(posBindSpace);
CVector3D normWorldSpace = newPoseMatrices[vtx.m_Blend.m_Bone[i]].Rotate(normBindSpace);
pos += posWorldSpace * vtx.m_Blend.m_Weight[i];
normal += normWorldSpace * vtx.m_Blend.m_Weight[i];
}
// If there was more than one influence, the result is probably not going
// to be of unit length (since it's a weighted sum of several independent
// unit vectors), so we need to normalise it.
// (It's fairly common to only have one influence, so it seems sensible to
// optimise that case a bit.)
if (vtx.m_Blend.m_Bone[1] != 0xff) // if more than one influence
normal.Normalize();
Position[j] = pos;
Normal[j] = normal;
}
}
// CModelDef Constructor
CModelDef::CModelDef()
: m_NumVertices(0), m_pVertices(0), m_NumFaces(0), m_pFaces(0), m_NumBones(0), m_Bones(0),