public DXScene(SharpDX.Direct3D11.Device device)
{
RenderGroups = new Dictionary<DXShader, RenderGroup>();
_transformBuffer = new Buffer(device, new BufferDescription()
{
Usage = ResourceUsage.Dynamic,
SizeInBytes = System.Runtime.InteropServices.Marshal.SizeOf<Matrix>(),
BindFlags = BindFlags.ConstantBuffer,
CpuAccessFlags = CpuAccessFlags.Write,
OptionFlags = ResourceOptionFlags.None,
StructureByteStride = 0
});
_globalLightsBuffer = new Buffer(device, new BufferDescription()
{
Usage = ResourceUsage.Dynamic,
SizeInBytes = System.Runtime.InteropServices.Marshal.SizeOf<GlobalLightsData>(),
BindFlags = BindFlags.ConstantBuffer,
CpuAccessFlags = CpuAccessFlags.Write,
OptionFlags = ResourceOptionFlags.None,
StructureByteStride = 0
});
WorldMatrix = Matrix.Identity;
_rootNode = new DXSceneNode()
{
Position = new Vector3(),
Orientation = Quaternion.Identity,
Scale = new Vector3(1.0f)
};
_rootNode.UpdateTransfromMatrix();
_globalLights = new GlobalLightsData()
{
Ambient = new Color4(0.5f, 0.5f, 0.5f, 1.0f),
Direction = new Vector3(0.0f, -1.0f, 0.0f),
Directional = new Color4(0.5f, 0.5f, 0.5f, 1.0f)
};
}
public DXSceneNode CreateChildNode()
{
DXSceneNode node = new DXSceneNode();
node.Parent = this;
node.Scale = new Vector3(1.0f);
node.Orientation = Quaternion.Identity;
node.Position = new Vector3(0.0f);
node.TransformationMatrix = Matrix.Identity;
Children.Add(node);
return node;
}
void RenderNode(DeviceContext device, DXSceneNode node, Matrix derivedTrnasform)
{
Matrix transform = node.TransformationMatrix * derivedTrnasform;
if(node.AttachedObjects.Count > 0)
{
transform.Transpose();
DataStream stream;
var dataBox = device.MapSubresource(_transformBuffer, 0, MapMode.WriteDiscard, MapFlags.None);
stream = new DataStream(dataBox.DataPointer, _transformBuffer.Description.SizeInBytes, true, true);
stream.Write(transform);
device.UnmapSubresource(_transformBuffer, 0); //to update the data on GPU
stream.Dispose();
transform.Transpose();
device.VertexShader.SetConstantBuffer((int)ConstantBufferSlots.WorldViewProjMatrix, _transformBuffer);
foreach(var model in node.AttachedObjects)
{
model.Shader.RenderFirstPass(device);
model.Render(device);
for(int i = 1; i < model.Shader.Passes.Count; ++i)
{
model.Shader.RenderPass(device, i);
model.Render(device);
}
}
}
foreach(var childNode in node.Children)
{
RenderNode(device, childNode, transform);
}
}
