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Implements COLLADA -1 vertex weight support, using simpler initial solution. Fixes #1012.

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This was SVN commit r11242.
This commit is contained in:
historic_bruno
2012-03-05 00:42:34 +00:00
parent f3a52dd440
commit 07ab38cdcb
3 changed files with 95 additions and 32 deletions
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source/graphics/Model.cpp
+11 -2
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@@ -1,4 +1,4 @@
/* Copyright (C) 2011 Wildfire Games.
/* Copyright (C) 2012 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. is free software: you can redistribute it and/or modify
@@ -84,7 +84,8 @@ bool CModel::InitModel(const CModelDefPtr& modeldef)
size_t numBlends = modeldef->GetNumBlends();
// allocate matrices for bone transformations
m_BoneMatrices = (CMatrix3D*)rtl_AllocateAligned(sizeof(CMatrix3D) * (numBones + numBlends), 16);
// (one extra matrix is used for the special case of bind-shape relative weighting)
m_BoneMatrices = (CMatrix3D*)rtl_AllocateAligned(sizeof(CMatrix3D) * (numBones + 1 + numBlends), 16);
for (size_t i = 0; i < numBones + numBlends; ++i)
{
m_BoneMatrices[i].SetIdentity();
@@ -398,6 +399,14 @@ void CModel::ValidatePosition()
m_BoneMatrices[i] = m_BoneMatrices[i] * m_InverseBindBoneMatrices[i];
}
// Note: there is a special case of joint influence, in which the vertex
// is influenced by the bind-shape transform instead of a particular bone,
// which we indicate with the blending bone ID set to the total number
// of bones. But since we're skinning in world space, we use the model's
// world space transform and store that matrix in this special index.
// (see http://trac.wildfiregames.com/ticket/1012)
m_BoneMatrices[m_pModelDef->GetNumBones()] = m_Transform;
m_pModelDef->BlendBoneMatrices(m_BoneMatrices);
}
}