void
MeshGeometry::render(RenderContext& rc,
double /* clock */) const
{
if (!m_hwBuffersCurrent)
{
realize();
}
// Track the last used material in order to avoid redundant
// material bindings.
unsigned int lastMaterialIndex = Submesh::DefaultMaterialIndex;
rc.pushModelView();
rc.scaleModelView(m_meshScale);
// Render all submeshes
GLVertexBuffer* boundVertexBuffer = NULL;
for (unsigned int i = 0; i < m_submeshes.size(); ++i)
{
const Submesh& submesh = *m_submeshes[i];
if (i < m_submeshBuffers.size() && m_submeshBuffers[i])
{
boundVertexBuffer = m_submeshBuffers[i];
rc.bindVertexBuffer(submesh.vertices()->vertexSpec(), m_submeshBuffers[i], submesh.vertices()->stride());
}
else
{
if (boundVertexBuffer)
{
boundVertexBuffer->unbind();
boundVertexBuffer = false;
}
rc.bindVertexArray(submesh.vertices());
}
const vector<PrimitiveBatch*>& batches = submesh.primitiveBatches();
const vector<unsigned int>& materials = submesh.materials();
assert(batches.size() == materials.size());
// Render all batches in the submesh
for (unsigned int j = 0; j < batches.size(); j++)
{
// If we have a new material, bind it
unsigned int materialIndex = materials[j];
if (materialIndex != lastMaterialIndex)
{
if (materialIndex < m_materials.size())
{
rc.bindMaterial(m_materials[materialIndex].ptr());
}
lastMaterialIndex = materialIndex;
}
rc.drawPrimitives(*batches[j]);
}
}
if (boundVertexBuffer)
{
boundVertexBuffer->unbind();
}
rc.popModelView();
}
void
MeshGeometry::renderShadow(RenderContext& rc,
double /* clock */) const
{
if (!m_hwBuffersCurrent)
{
realize();
}
// Use an extremely basic material to avoid wasting time
// with pixel shader calculations when we're just interested
// in depth values.
Material simpleMaterial;
rc.bindMaterial(&simpleMaterial);
rc.pushModelView();
rc.scaleModelView(m_meshScale);
// Render all submeshes
GLVertexBuffer* boundVertexBuffer = NULL;
for (unsigned int i = 0; i < m_submeshes.size(); ++i)
{
const Submesh& submesh = *m_submeshes[i];
if (i < m_submeshBuffers.size() && m_submeshBuffers[i])
{
boundVertexBuffer = m_submeshBuffers[i];
rc.bindVertexBuffer(submesh.vertices()->vertexSpec(), m_submeshBuffers[i], submesh.vertices()->stride());
}
else
{
if (boundVertexBuffer)
{
boundVertexBuffer->unbind();
boundVertexBuffer = false;
}
rc.bindVertexArray(submesh.vertices());
}
const vector<PrimitiveBatch*>& batches = submesh.primitiveBatches();
const vector<unsigned int>& materials = submesh.materials();
assert(batches.size() == materials.size());
// Render all batches in the submesh
for (unsigned int j = 0; j < batches.size(); j++)
{
// Skip mostly transparent items when drawing into the shadow
// buffer.
// TODO: Textures with transparent parts aren't handled here
unsigned int materialIndex = materials[j];
if (materialIndex >= m_materials.size() || m_materials[materialIndex]->opacity() > 0.5f)
{
rc.drawPrimitives(*batches[j]);
}
}
}
if (boundVertexBuffer)
{
boundVertexBuffer->unbind();
}
rc.popModelView();
}
