internal RenderStateBlock GetDefaultRenderStateBlock(bool stencilTest, StencilTestOptions stencilTestOptions)
{
RenderStateBlock renderStateBlock = new RenderStateBlock();
if (stencilTest && m_stencilTestState != StencilTestState.None)
{
int stencilMask = StencilMaskAllocator.GetCurrentBit();
renderStateBlock.mask = RenderStateMask.Stencil;
renderStateBlock.stencilReference = stencilMask;
if (m_stencilTestState == StencilTestState.BothSide)
{
if ((stencilTestOptions & StencilTestOptions.PreventOverwriting) == 0)
{
renderStateBlock.stencilState = new StencilState(true, (byte)stencilMask, 0, CompareFunction.Equal, StencilOp.Keep, StencilOp.Keep, StencilOp.Keep);
}
else
{
renderStateBlock.stencilState = new StencilState(true, (byte)stencilMask, (byte)stencilMask, CompareFunction.Equal, StencilOp.Zero, StencilOp.Keep, StencilOp.Keep);
}
}
else
{
if ((stencilTestOptions & StencilTestOptions.PreventOverwriting) == 0)
{
renderStateBlock.stencilState = new StencilState(true, (byte)stencilMask, 0, CompareFunction.NotEqual, StencilOp.Keep, StencilOp.Keep, StencilOp.Keep);
}
else
{
renderStateBlock.stencilState = new StencilState(true, (byte)stencilMask, (byte)stencilMask, CompareFunction.NotEqual, StencilOp.Replace, StencilOp.Keep, StencilOp.Keep);
}
}
}
return(renderStateBlock);
}
protected void GetDefaultDrawSettings(ref RenderingData renderingData, Material material, out DrawingSettings drawingSettings, out FilteringSettings filteringSettings, out RenderStateBlock renderStateBlock)
{
base.GetDefaultDrawSettings(renderingData.cameraData.camera, material, out drawingSettings, out filteringSettings);
drawingSettings.enableDynamicBatching = renderingData.supportsDynamicBatching;
drawingSettings.perObjectData = perObjectData;
renderStateBlock = new RenderStateBlock();
if (useStencilTest && m_stencilTestState != StencilTestState.None)
{
int stencilMask = StencilMaskAllocator.GetCurrentBit();
renderStateBlock.mask = RenderStateMask.Stencil;
renderStateBlock.stencilReference = stencilMask;
if (m_stencilTestState == StencilTestState.BothSide)
{
if ((m_stencilTestOptions & StencilTestOptions.PreventOverwriting) == 0)
{
renderStateBlock.stencilState = new StencilState(true, (byte)stencilMask, 0, CompareFunction.Equal, StencilOp.Keep, StencilOp.Keep, StencilOp.Keep);
}
else
{
renderStateBlock.stencilState = new StencilState(true, (byte)stencilMask, (byte)stencilMask, CompareFunction.Equal, StencilOp.Zero, StencilOp.Keep, StencilOp.Keep);
}
}
else
{
if ((m_stencilTestOptions & StencilTestOptions.PreventOverwriting) == 0)
{
renderStateBlock.stencilState = new StencilState(true, (byte)stencilMask, 0, CompareFunction.NotEqual, StencilOp.Keep, StencilOp.Keep, StencilOp.Keep);
}
else
{
renderStateBlock.stencilState = new StencilState(true, (byte)stencilMask, (byte)stencilMask, CompareFunction.NotEqual, StencilOp.Replace, StencilOp.Keep, StencilOp.Keep);
}
}
}
}
internal void WriteFrustumStencil(ScriptableRenderContext context, Camera camera, Material nonSharedStencilMaterial)
{
int stencilMask = StencilMaskAllocator.GetCurrentBit();
if (stencilMask == 0)
{
m_stencilTestState = StencilTestState.None;
Debug.LogError("Couldn't use stencil test. No stencil bits available. Please change Stencil Mask value in Projector Renderer Feature.");
return;
}
// check if the frustum intersect with camera near plane.
Vector3 cameraLocalPos = transform.InverseTransformPoint(camera.transform.position);
Vector3 nearClipRect = camera.nearClipPlane * 2.0f * Mathf.Tan(Mathf.Deg2Rad * camera.fieldOfView) * new Vector3(camera.aspect, 1.0f, 0.0f);
nearClipRect.z = camera.nearClipPlane;
Matrix4x4 localToCamera = camera.worldToCameraMatrix * transform.localToWorldMatrix;
bool clipped = true;
for (int i = 0; i < 6; ++i)
{
int face = i >> 1;
int n = i & 1;
int axis1 = (face + 1 + n) % 3;
int axis2 = (face + 2 - n) % 3;
int vtx1 = n * (1 << face);
int vtx2 = vtx1 + (1 << axis1);
int vtx3 = vtx1 + (1 << axis2);
Plane frustumPlane = new Plane(GetProjectorFrustumVertex(vtx1), GetProjectorFrustumVertex(vtx2), GetProjectorFrustumVertex(vtx3));
Vector3 offset = Vector3.Scale(nearClipRect, localToCamera.MultiplyVector(frustumPlane.normal));
if (Mathf.Abs(offset.x) + Mathf.Abs(offset.y) + Mathf.Max(0, offset.z) < frustumPlane.GetDistanceToPoint(cameraLocalPos))
{
clipped = false;
break;
}
}
CommandBuffer commandBuffer = CommandBufferPool.Get();
if (StencilMaskAllocator.loopFlag)
{
StencilMaskAllocator.ClearLoopFlag();
ClearFullscreenStencil(commandBuffer);
}
nonSharedStencilMaterial.SetFloat(s_shaderPropIdStencilRef, stencilMask);
nonSharedStencilMaterial.SetFloat(s_shaderPropIdStencilMask, stencilMask);
Mesh frustumMesh = GetFrustumMesh();
if (clipped)
{
m_stencilTestState = StencilTestState.BackfaceOnly;
commandBuffer.DrawMesh(frustumMesh, transform.localToWorldMatrix, nonSharedStencilMaterial, 0, 2);
}
else
{
m_stencilTestState = StencilTestState.BothSide;
commandBuffer.DrawMesh(frustumMesh, transform.localToWorldMatrix, nonSharedStencilMaterial, 0, 0);
commandBuffer.DrawMesh(frustumMesh, transform.localToWorldMatrix, nonSharedStencilMaterial, 0, 1);
}
context.ExecuteCommandBuffer(commandBuffer);
CommandBufferPool.Release(commandBuffer);
}