void BatchGroup::Draw(View* view, Camera* camera, bool allowDepthWrite) const
{
Graphics* graphics = view->GetGraphics();
Renderer* renderer = view->GetRenderer();
if (instances_.Size() && !geometry_->IsEmpty())
{
// Draw as individual objects if instancing not supported or could not fill the instancing buffer
VertexBuffer* instanceBuffer = renderer->GetInstancingBuffer();
if (!instanceBuffer || geometryType_ != GEOM_INSTANCED || startIndex_ == M_MAX_UNSIGNED)
{
Batch::Prepare(view, camera, false, allowDepthWrite);
graphics->SetIndexBuffer(geometry_->GetIndexBuffer());
graphics->SetVertexBuffers(geometry_->GetVertexBuffers());
for (unsigned i = 0; i < instances_.Size(); ++i)
{
if (graphics->NeedParameterUpdate(SP_OBJECT, instances_[i].worldTransform_))
graphics->SetShaderParameter(VSP_MODEL, *instances_[i].worldTransform_);
graphics->Draw(geometry_->GetPrimitiveType(), geometry_->GetIndexStart(), geometry_->GetIndexCount(),
geometry_->GetVertexStart(), geometry_->GetVertexCount());
}
}
else
{
Batch::Prepare(view, camera, false, allowDepthWrite);
// Get the geometry vertex buffers, then add the instancing stream buffer
// Hack: use a const_cast to avoid dynamic allocation of new temp vectors
Vector<SharedPtr<VertexBuffer> >& vertexBuffers = const_cast<Vector<SharedPtr<VertexBuffer> >&>(
geometry_->GetVertexBuffers());
vertexBuffers.Push(SharedPtr<VertexBuffer>(instanceBuffer));
graphics->SetIndexBuffer(geometry_->GetIndexBuffer());
graphics->SetVertexBuffers(vertexBuffers, startIndex_);
graphics->DrawInstanced(geometry_->GetPrimitiveType(), geometry_->GetIndexStart(), geometry_->GetIndexCount(),
geometry_->GetVertexStart(), geometry_->GetVertexCount(), instances_.Size());
// Remove the instancing buffer & element mask now
vertexBuffers.Pop();
}
}
}
void BatchGroup::Draw(View* view) const
{
Graphics* graphics = view->GetGraphics();
Renderer* renderer = view->GetRenderer();
if (instances_.Size() && !geometry_->IsEmpty())
{
// Draw as individual objects if instancing not supported
VertexBuffer* instanceBuffer = renderer->GetInstancingBuffer();
if (!instanceBuffer || geometryType_ != GEOM_INSTANCED)
{
Batch::Prepare(view, false);
graphics->SetIndexBuffer(geometry_->GetIndexBuffer());
graphics->SetVertexBuffers(geometry_->GetVertexBuffers(), geometry_->GetVertexElementMasks());
for (unsigned i = 0; i < instances_.Size(); ++i)
{
if (graphics->NeedParameterUpdate(SP_OBJECTTRANSFORM, instances_[i].worldTransform_))
graphics->SetShaderParameter(VSP_MODEL, *instances_[i].worldTransform_);
graphics->Draw(geometry_->GetPrimitiveType(), geometry_->GetIndexStart(), geometry_->GetIndexCount(),
geometry_->GetVertexStart(), geometry_->GetVertexCount());
}
}
else
{
Batch::Prepare(view, false);
// Get the geometry vertex buffers, then add the instancing stream buffer
// Hack: use a const_cast to avoid dynamic allocation of new temp vectors
Vector<SharedPtr<VertexBuffer> >& vertexBuffers = const_cast<Vector<SharedPtr<VertexBuffer> >&>
(geometry_->GetVertexBuffers());
PODVector<unsigned>& elementMasks = const_cast<PODVector<unsigned>&>(geometry_->GetVertexElementMasks());
vertexBuffers.Push(SharedPtr<VertexBuffer>(instanceBuffer));
elementMasks.Push(instanceBuffer->GetElementMask());
// No stream offset support, instancing buffer not pre-filled with transforms: have to fill now
if (startIndex_ == M_MAX_UNSIGNED)
{
unsigned startIndex = 0;
while (startIndex < instances_.Size())
{
unsigned instances = instances_.Size() - startIndex;
if (instances > instanceBuffer->GetVertexCount())
instances = instanceBuffer->GetVertexCount();
// Copy the transforms
Matrix3x4* dest = (Matrix3x4*)instanceBuffer->Lock(0, instances, true);
if (dest)
{
for (unsigned i = 0; i < instances; ++i)
dest[i] = *instances_[i + startIndex].worldTransform_;
instanceBuffer->Unlock();
graphics->SetIndexBuffer(geometry_->GetIndexBuffer());
graphics->SetVertexBuffers(vertexBuffers, elementMasks);
graphics->DrawInstanced(geometry_->GetPrimitiveType(), geometry_->GetIndexStart(),
geometry_->GetIndexCount(), geometry_->GetVertexStart(), geometry_->GetVertexCount(), instances);
}
startIndex += instances;
}
}
// Stream offset supported and instancing buffer has been already filled, so just draw
else
{
graphics->SetIndexBuffer(geometry_->GetIndexBuffer());
graphics->SetVertexBuffers(vertexBuffers, elementMasks, startIndex_);
graphics->DrawInstanced(geometry_->GetPrimitiveType(), geometry_->GetIndexStart(), geometry_->GetIndexCount(),
geometry_->GetVertexStart(), geometry_->GetVertexCount(), instances_.Size());
}
// Remove the instancing buffer & element mask now
vertexBuffers.Pop();
elementMasks.Pop();
}
}
}
