/// <summary>
/// Updates the command buffer.
/// </summary>
private void UpdateCommandBuffer()
{
// Determine which cameras are omnidirectional.
List <float> sourceCamAreOmnidirectional = new List <float>();
foreach (CameraModel cameraModel in cameraSetup.cameraModels)
{
sourceCamAreOmnidirectional.Add(cameraModel.isOmnidirectional ? 1 : 0);
}
// Determine camera parameters to pass to the material as properties.
List <float> sourceCamIndices;
List <Vector4> sourceCamPositions;
List <Matrix4x4> meshTransformationMatrices;
_helperDiskBlending.UpdateBlendingParameters(ref blendingMaterial, cameraSetup.cameraModels, PMPerViewMeshesFS.meshTransforms, out sourceCamIndices, out sourceCamPositions, out meshTransformationMatrices);
// Update the blending material with the current focal length.
_helperFocalSurfaces.SendFocalLengthToBlendingMaterial(ref blendingMaterial);
// Indicate the cameras' indices and positions.
MaterialPropertyBlock properties = new MaterialPropertyBlock();
properties.SetFloatArray(_shaderNameSourceCamIndex, sourceCamIndices);
properties.SetVectorArray(_shaderNameSourceCamPosXYZ, sourceCamPositions);
properties.SetFloatArray(_shaderNameSourceCamIsOmnidirectional, sourceCamAreOmnidirectional);
// Clear the instructions in the command buffer.
_helperCommandBuffer.commandBuffer.Clear();
// Copy the camera target to a temporary render texture, e.g. to copy the skybox in the scene view.
int tempID = Shader.PropertyToID("TempCopyColorBuffer");
_helperCommandBuffer.commandBuffer.GetTemporaryRT(tempID, -1, -1, 0, FilterMode.Bilinear);
_helperCommandBuffer.commandBuffer.SetRenderTarget(tempID);
_helperCommandBuffer.commandBuffer.ClearRenderTarget(true, true, Color.clear);
_helperCommandBuffer.commandBuffer.Blit(BuiltinRenderTextureType.CameraTarget, tempID);
// Clear the camera target's color and depth buffers.
_helperCommandBuffer.commandBuffer.SetRenderTarget(BuiltinRenderTextureType.CameraTarget);
_helperCommandBuffer.commandBuffer.ClearRenderTarget(true, true, Color.clear);
// Render the focal surfaces to the depth and color buffer using GPU instancing.
_helperCommandBuffer.commandBuffer.DrawMeshInstanced(PMPerViewMeshesFS.meshTransforms[0].GetComponent <MeshFilter>().sharedMesh, 0, blendingMaterial, 0, meshTransformationMatrices.ToArray(), PMPerViewMeshesFS.meshTransforms.Length, properties);
// Normalize the RGB channels of the color buffer by the alpha channel, by copying into a temporary render texture.
// Note: Be sure to use ZWrite Off. Blit renders a quad, and thus - if ZWrite On - provides the target with the quad's depth, not the render texture's depth.
_helperCommandBuffer.commandBuffer.Blit(BuiltinRenderTextureType.CameraTarget, tempID, blendingMaterial, 1);
_helperCommandBuffer.commandBuffer.Blit(tempID, BuiltinRenderTextureType.CameraTarget);
_helperCommandBuffer.commandBuffer.ReleaseTemporaryRT(tempID);
}
/// <summary>
/// Updates the command buffer.
/// </summary>
private void UpdateCommandBuffer()
{
// Clear the instructions in the command buffer.
_helperCommandBuffer.commandBuffer.Clear();
// Clear the target textures.
_helperCommandBuffer.commandBuffer.SetRenderTarget(_targetColorTexture);
_helperCommandBuffer.commandBuffer.ClearRenderTarget(true, true, Color.clear);
_helperCommandBuffer.commandBuffer.SetRenderTarget(_targetDepthTexture);
_helperCommandBuffer.commandBuffer.ClearRenderTarget(true, true, Color.clear);
// Copy the camera target's color (i.e. the rendered background) into the target color texture.
renderingCaller.mainCamera.Render();
_helperCommandBuffer.commandBuffer.Blit(BuiltinRenderTextureType.CameraTarget, _targetColorTexture);
// Clear the camera target's color and depth buffers.
_helperCommandBuffer.commandBuffer.SetRenderTarget(BuiltinRenderTextureType.CameraTarget);
_helperCommandBuffer.commandBuffer.ClearRenderTarget(true, true, Color.clear);
// Copy the target color and depth textures to the stored ones, effectively clearing the latter.
_helperCommandBuffer.commandBuffer.Blit(_targetColorTexture, _storedColorTexture);
_helperCommandBuffer.commandBuffer.Blit(_targetDepthTexture, _storedDepthTexture);
// Determine additional camera parameters to pass to the material as properties.
List <float> sourceCamIndices;
List <Vector4> sourceCamPositions;
List <Matrix4x4> meshTransformationMatrices;
_helperDiskBlending.UpdateBlendingParameters(ref blendingMaterial, cameraSetup.cameraModels, PMPerViewMeshesQSTR.perViewMeshTransforms, out sourceCamIndices, out sourceCamPositions, out meshTransformationMatrices);
// Perform a soft z-test for each source camera and blend them together, storing the result in the stored depth and color textures.
MaterialPropertyBlock properties = new MaterialPropertyBlock();
for (int i = 0; i < PMPerViewMeshesQSTR.perViewMeshTransforms.Length; i++)
{
// Indicate the camera's index and position.
properties.SetFloat(_shaderNameSourceCamIndex, sourceCamIndices[i]);
properties.SetVector(_shaderNameSourceCamPosXYZ, sourceCamPositions[i]);
properties.SetFloat(_shaderNameSourceCamIsOmnidirectional, cameraSetup.cameraModels[i].isOmnidirectional ? 1 : 0);
// Draw the mesh into the target textures' color and depth buffers.
_helperCommandBuffer.commandBuffer.SetRenderTarget(color: _targetColorTexture, depth: _targetDepthTexture);
_helperCommandBuffer.commandBuffer.DrawMesh(PMPerViewMeshesQSTR.perViewMeshes[i], meshTransformationMatrices[i], blendingMaterial, 0, 0, properties);
// Copy the target textures into the stored textures.
_helperCommandBuffer.commandBuffer.Blit(_targetColorTexture, _storedColorTexture);
_helperCommandBuffer.commandBuffer.Blit(_targetDepthTexture, _storedDepthTexture);
}
// Normalize the stored color texture's RGB channels by its alpha channel, and copy the stored depth and color textures to the camera target.
_helperCommandBuffer.commandBuffer.Blit(null, BuiltinRenderTextureType.CameraTarget, blendingMaterial, 1);
}