// Helper function to copy object-space position and normal vectors into arrays.
void ModelRenderer::CopyPositionAndNormals(
const CModelDefPtr& mdef,
const VertexArrayIterator<CVector3D>& Position,
const VertexArrayIterator<CVector3D>& Normal)
{
size_t numVertices = mdef->GetNumVertices();
SModelVertex* vertices = mdef->GetVertices();
for(size_t j = 0; j < numVertices; ++j)
{
Position[j] = vertices[j].m_Coords;
Normal[j] = vertices[j].m_Norm;
}
}
// Copy UV coordinates
void ModelRenderer::BuildUV(
const CModelDefPtr& mdef,
const VertexArrayIterator<float[2]>& UV,
int UVset)
{
size_t numVertices = mdef->GetNumVertices();
SModelVertex* vertices = mdef->GetVertices();
for (size_t j=0; j < numVertices; ++j)
{
UV[j][0] = vertices[j].m_UVs[UVset * 2];
UV[j][1] = 1.0-vertices[j].m_UVs[UVset * 2 + 1];
}
}
// Helper function to transform position and normal vectors into world-space.
void ModelRenderer::BuildPositionAndNormals(
CModel* model,
const VertexArrayIterator<CVector3D>& Position,
const VertexArrayIterator<CVector3D>& Normal)
{
CModelDefPtr mdef = model->GetModelDef();
size_t numVertices = mdef->GetNumVertices();
SModelVertex* vertices=mdef->GetVertices();
if (model->IsSkinned())
{
// boned model - calculate skinned vertex positions/normals
// Avoid the noisy warnings that occur inside SkinPoint/SkinNormal in
// some broken situations
if (numVertices && vertices[0].m_Blend.m_Bone[0] == 0xff)
{
LOGERROR("Model %s is boned with unboned animation", mdef->GetName().string8());
return;
}
#if HAVE_SSE
if (g_EnableSSE)
{
CModelDef::SkinPointsAndNormals_SSE(numVertices, Position, Normal, vertices, mdef->GetBlendIndices(), model->GetAnimatedBoneMatrices());
}
else
#endif
{
CModelDef::SkinPointsAndNormals(numVertices, Position, Normal, vertices, mdef->GetBlendIndices(), model->GetAnimatedBoneMatrices());
}
}
else
{
PROFILE( "software transform" );
// just copy regular positions, transform normals to world space
const CMatrix3D& transform = model->GetTransform();
const CMatrix3D& invtransform = model->GetInvTransform();
for (size_t j=0; j<numVertices; j++)
{
transform.Transform(vertices[j].m_Coords,Position[j]);
invtransform.RotateTransposed(vertices[j].m_Norm,Normal[j]);
}
}
}
IModelDef::IModelDef(const CModelDefPtr& mdef, bool gpuSkinning, bool calculateTangents)
: m_IndexArray(GL_STATIC_DRAW), m_Array(GL_STATIC_DRAW)
{
size_t numVertices = mdef->GetNumVertices();
m_Position.type = GL_FLOAT;
m_Position.elems = 3;
m_Array.AddAttribute(&m_Position);
m_Normal.type = GL_FLOAT;
m_Normal.elems = 3;
m_Array.AddAttribute(&m_Normal);
m_UVs.resize(mdef->GetNumUVsPerVertex());
for (size_t i = 0; i < mdef->GetNumUVsPerVertex(); i++)
{
m_UVs[i].type = GL_FLOAT;
m_UVs[i].elems = 2;
m_Array.AddAttribute(&m_UVs[i]);
}
if (gpuSkinning)
{
m_BlendJoints.type = GL_UNSIGNED_BYTE;
m_BlendJoints.elems = 4;
m_Array.AddAttribute(&m_BlendJoints);
m_BlendWeights.type = GL_UNSIGNED_BYTE;
m_BlendWeights.elems = 4;
m_Array.AddAttribute(&m_BlendWeights);
}
if (calculateTangents)
{
// Generate tangents for the geometry:-
m_Tangent.type = GL_FLOAT;
m_Tangent.elems = 4;
m_Array.AddAttribute(&m_Tangent);
// floats per vertex; position + normal + tangent + UV*sets [+ GPUskinning]
int numVertexAttrs = 3 + 3 + 4 + 2 * mdef->GetNumUVsPerVertex();
if (gpuSkinning)
{
numVertexAttrs += 8;
}
// the tangent generation can increase the number of vertices temporarily
// so reserve a bit more memory to avoid reallocations in GenTangents (in most cases)
std::vector<float> newVertices;
newVertices.reserve(numVertexAttrs * numVertices * 2);
// Generate the tangents
ModelRenderer::GenTangents(mdef, newVertices, gpuSkinning);
// how many vertices do we have after generating tangents?
int newNumVert = newVertices.size() / numVertexAttrs;
std::vector<int> remapTable(newNumVert);
std::vector<float> vertexDataOut(newNumVert * numVertexAttrs);
// re-weld the mesh to remove duplicated vertices
int numVertices2 = WeldMesh(&remapTable[0], &vertexDataOut[0],
&newVertices[0], newNumVert, numVertexAttrs);
// Copy the model data to graphics memory:-
m_Array.SetNumVertices(numVertices2);
m_Array.Layout();
VertexArrayIterator<CVector3D> Position = m_Position.GetIterator<CVector3D>();
VertexArrayIterator<CVector3D> Normal = m_Normal.GetIterator<CVector3D>();
VertexArrayIterator<CVector4D> Tangent = m_Tangent.GetIterator<CVector4D>();
VertexArrayIterator<u8[4]> BlendJoints;
VertexArrayIterator<u8[4]> BlendWeights;
if (gpuSkinning)
{
BlendJoints = m_BlendJoints.GetIterator<u8[4]>();
BlendWeights = m_BlendWeights.GetIterator<u8[4]>();
}
// copy everything into the vertex array
for (int i = 0; i < numVertices2; i++)
{
int q = numVertexAttrs * i;
Position[i] = CVector3D(vertexDataOut[q + 0], vertexDataOut[q + 1], vertexDataOut[q + 2]);
q += 3;
Normal[i] = CVector3D(vertexDataOut[q + 0], vertexDataOut[q + 1], vertexDataOut[q + 2]);
q += 3;
Tangent[i] = CVector4D(vertexDataOut[q + 0], vertexDataOut[q + 1], vertexDataOut[q + 2],
vertexDataOut[q + 3]);
q += 4;
if (gpuSkinning)
{
for (size_t j = 0; j < 4; ++j)
{
BlendJoints[i][j] = (u8)vertexDataOut[q + 0 + 2 * j];
BlendWeights[i][j] = (u8)vertexDataOut[q + 1 + 2 * j];
}
q += 8;
}
for (size_t j = 0; j < mdef->GetNumUVsPerVertex(); j++)
{
VertexArrayIterator<float[2]> UVit = m_UVs[j].GetIterator<float[2]>();
UVit[i][0] = vertexDataOut[q + 0 + 2 * j];
UVit[i][1] = vertexDataOut[q + 1 + 2 * j];
}
}
// upload vertex data
m_Array.Upload();
m_Array.FreeBackingStore();
m_IndexArray.SetNumVertices(mdef->GetNumFaces() * 3);
m_IndexArray.Layout();
VertexArrayIterator<u16> Indices = m_IndexArray.GetIterator();
size_t idxidx = 0;
// reindex geometry and upload index
for (size_t j = 0; j < mdef->GetNumFaces(); ++j)
{
Indices[idxidx++] = remapTable[j * 3 + 0];
Indices[idxidx++] = remapTable[j * 3 + 1];
Indices[idxidx++] = remapTable[j * 3 + 2];
}
m_IndexArray.Upload();
m_IndexArray.FreeBackingStore();
}
else
{
// Upload model without calculating tangents:-
m_Array.SetNumVertices(numVertices);
m_Array.Layout();
VertexArrayIterator<CVector3D> Position = m_Position.GetIterator<CVector3D>();
VertexArrayIterator<CVector3D> Normal = m_Normal.GetIterator<CVector3D>();
ModelRenderer::CopyPositionAndNormals(mdef, Position, Normal);
for (size_t i = 0; i < mdef->GetNumUVsPerVertex(); i++)
{
VertexArrayIterator<float[2]> UVit = m_UVs[i].GetIterator<float[2]>();
ModelRenderer::BuildUV(mdef, UVit, i);
}
if (gpuSkinning)
{
VertexArrayIterator<u8[4]> BlendJoints = m_BlendJoints.GetIterator<u8[4]>();
VertexArrayIterator<u8[4]> BlendWeights = m_BlendWeights.GetIterator<u8[4]>();
for (size_t i = 0; i < numVertices; ++i)
{
const SModelVertex& vtx = mdef->GetVertices()[i];
for (size_t j = 0; j < 4; ++j)
{
BlendJoints[i][j] = vtx.m_Blend.m_Bone[j];
BlendWeights[i][j] = (u8)(255.f * vtx.m_Blend.m_Weight[j]);
}
}
}
m_Array.Upload();
m_Array.FreeBackingStore();
m_IndexArray.SetNumVertices(mdef->GetNumFaces()*3);
m_IndexArray.Layout();
ModelRenderer::BuildIndices(mdef, m_IndexArray.GetIterator());
m_IndexArray.Upload();
m_IndexArray.FreeBackingStore();
}
}