// Prepare UV coordinates for this modeldef
void InstancingModelRenderer::PrepareModelDef(const CShaderProgramPtr& shader, int streamflags, const CModelDef& def)
{
	m->imodeldef = (IModelDef*)def.GetRenderData(m);

	ENSURE(m->imodeldef);

	u8* base = m->imodeldef->m_Array.Bind();
	GLsizei stride = (GLsizei)m->imodeldef->m_Array.GetStride();

	m->imodeldefIndexBase = m->imodeldef->m_IndexArray.Bind();

	if (streamflags & STREAM_POS)
		shader->VertexPointer(3, GL_FLOAT, stride, base + m->imodeldef->m_Position.offset);

	if (streamflags & STREAM_NORMAL)
		shader->NormalPointer(GL_FLOAT, stride, base + m->imodeldef->m_Normal.offset);
	
	if (m->calculateTangents)
		shader->VertexAttribPointer(str_a_tangent, 4, GL_FLOAT, GL_TRUE, stride, base + m->imodeldef->m_Tangent.offset);

	if (streamflags & STREAM_UV0)
		shader->TexCoordPointer(GL_TEXTURE0, 2, GL_FLOAT, stride, base + m->imodeldef->m_UVs[0].offset);
	
	if ((streamflags & STREAM_UV1) && def.GetNumUVsPerVertex() >= 2)
		shader->TexCoordPointer(GL_TEXTURE1, 2, GL_FLOAT, stride, base + m->imodeldef->m_UVs[1].offset);

	// GPU skinning requires extra attributes to compute positions/normals
	if (m->gpuSkinning)
	{
		shader->VertexAttribPointer(str_a_skinJoints, 4, GL_UNSIGNED_BYTE, GL_FALSE, stride, base + m->imodeldef->m_BlendJoints.offset);
		shader->VertexAttribPointer(str_a_skinWeights, 4, GL_UNSIGNED_BYTE, GL_TRUE, stride, base + m->imodeldef->m_BlendWeights.offset);
	}

	shader->AssertPointersBound();
}
// Prepare UV coordinates for this modeldef
void InstancingModelRenderer::PrepareModelDef(CShaderProgramPtr& shader, int streamflags, const CModelDefPtr& def)
{
	m->imodeldef = (IModelDef*)def->GetRenderData(m);

	ENSURE(m->imodeldef);

	u8* base = m->imodeldef->m_Array.Bind();
	GLsizei stride = (GLsizei)m->imodeldef->m_Array.GetStride();

	m->imodeldefIndexBase = m->imodeldef->m_IndexArray.Bind();

	if (streamflags & STREAM_POS)
		shader->VertexPointer(3, GL_FLOAT, stride, base + m->imodeldef->m_Position.offset);

	if (streamflags & STREAM_NORMAL)
		shader->NormalPointer(GL_FLOAT, stride, base + m->imodeldef->m_Normal.offset);

	if (streamflags & STREAM_UV0)
		shader->TexCoordPointer(GL_TEXTURE0, 2, GL_FLOAT, stride, base + m->imodeldef->m_UV.offset);

	shader->AssertPointersBound();
}