private void UpdateComputeShader()
{
m_cachedCameraData.Set(m_mainCamera.nearClipPlane, m_mainCamera.farClipPlane,
m_mainCamera.fieldOfView * Mathf.Deg2Rad, m_mainCamera.aspect);
InstancingUtilities.GetFrustumPlanes(m_frustumPlanes, m_mainCamera);
InstancingUtilities.UnrollFloats(m_frustumPlanes, m_frustumPlanesUnrolled);
InstancingUtilities.UnrollFloats(m_mainCamera.transform.localToWorldMatrix, m_cameraToWorldMatrixUnrolled);
//Used to linearize Z buffer values. x is (1 - far / near), y is (far / near), z is (x / far) and w is (y / far).
float farOverNear = m_mainCamera.farClipPlane / m_mainCamera.nearClipPlane;
Vector4 _ZBufferParams = new Vector4(1f - farOverNear, farOverNear, 1, 1);
m_computeShader.SetTextureFromGlobal(m_cachedComputeMaxDepthKernel, "_DepthTexture", "_CameraDepthTexture");
m_computeShader.SetVector("_ZBufferParams", _ZBufferParams);
m_computeShader.SetFloat("maxShadowRange", m_maxShadowRange);
m_computeShader.SetInt("yAxisDownsample", m_yAxisDownsample);
m_computeShader.SetFloats("frustumPlanes", m_frustumPlanesUnrolled);
m_computeShader.SetVector("camData", m_cachedCameraData);
m_computeShader.SetFloats("cameraToWorldMatrix", m_cameraToWorldMatrixUnrolled);
m_computeShader.SetVector("lightDir", m_directionalLight.transform.forward);
}
private void UpdateComputeShader()
{
if (m_debugAppendCount)
{
m_argsBuffersArray[0][0].GetData(m_argsArray[0][0]);
m_argsBuffersArray[1][0].GetData(m_argsArray[1][0]);
m_argsBuffersArray[2][0].GetData(m_argsArray[2][0]);
Debug.Log("Previous frame append count: " + m_argsArray[0][0][1].ToString("f3") + " and lod1: " + m_argsArray[1][0][1].ToString("f3")
+ " and lod2: " + m_argsArray[2][0][1].ToString("f3"));
}
#if UNITY_EDITOR
if (m_dirtyPositionInstances.Count > 0 || m_dirtyRotationInstances.Count > 0 || m_dirtyScaleInstances.Count > 0)
{
if (m_dirtyPositionInstances.Count > 0 || m_dirtyScaleInstances.Count > 0)
{
m_positionBuffer.SetData(m_instanceData.m_positions);
m_dirtyPositionInstances.Clear();
m_dirtyScaleInstances.Clear();
}
if (m_dirtyRotationInstances.Count > 0)
{
m_rotationBuffer.SetData(m_instanceData.m_rotations);
m_dirtyRotationInstances.Clear();
}
}
#endif
InstancingUtilities.GetFrustumPlanes(m_frustumPlanes, m_mainCamera);
Vector4 screenSpaceLODSize = Vector4.zero;
for (int i = 0; i < m_cachedNumLods; i++)
{
screenSpaceLODSize[i] = Mathf.Pow((m_LodSettings[i].screenSize * 0.5f), 2);
}
Vector4 frustumBoundingSphere = InstancingUtilities.GenerateFrustumBoundingSphere(m_mainCamera, m_coarseCullFarDistance);
int[] shadowSettingsArray = new int[m_cachedNumLods];
for (int i = 0; i < m_cachedNumLods; i++)
{
shadowSettingsArray[i] = (int)m_LodSettings[i].shadowSetting;
}
InstancingUtilities.UnrollFloats(m_frustumPlanes, m_frustumPlanesUnrolled);
InstancingUtilities.UnrollFloats(m_shadowRegionPlanes, m_shadowRegionPlanesUnrolled);
InstancingUtilities.UnrollFloats(m_mainCamera.projectionMatrix, m_cameraProjectionMatrixUnrolled);
m_computeShader.SetVector("cameraData", m_mainCamera.transform.position);
m_computeShader.SetFloats("cameraProjectionMatrix", m_cameraProjectionMatrixUnrolled);
m_computeShader.SetFloats("frustumPlanes", m_frustumPlanesUnrolled);
m_computeShader.SetFloats("shadowRegionPlanes", m_shadowRegionPlanesUnrolled);
m_computeShader.SetVector("screenSpaceLODSize", screenSpaceLODSize); //should not occur every update
m_computeShader.SetFloat("Time", Time.time);
m_computeShader.SetInts("castShadowsLOD", shadowSettingsArray); //should not occur every update
m_computeShader.SetVector("frustumBoundingSphere", frustumBoundingSphere);
for (int i = 0; i < m_cachedNumLods; i++)
{
m_appendBuffers[i].SetCounterValue(0);
}
m_computeShader.Dispatch(m_cachedComputeKernel, Mathf.CeilToInt(m_instanceCount / 256f), 1, 1);
for (int i = 0; i < m_cachedNumLods; i++)
{
for (int j = 0; j < m_LodSettings[i].mesh.subMeshCount; j++)
{
ComputeBuffer.CopyCount(m_appendBuffers[i], m_argsBuffersArray[i][j], 1 * sizeof(uint));
}
}
}