private void OnPostRender()
{
Camera cam = Camera.current;
// rt设置为当前的渲染目标
Graphics.SetRenderTarget(rt);
// 将手动创建的rt执行clear操作，使其变成一个白色的贴图
GL.Clear(true, true, Color.white);
// start drawcall
pureColorMaterial.color = new Color(0, 0.5f, 0.8f);
pureColorMaterial.SetPass(0);
// 使用同一个材质，绘制多个模型
foreach (Transform transform in cubeTransforms)
{
Graphics.DrawMeshNow(cubeMesh, transform.localToWorldMatrix);
}
// end drawcall
skyboxDraw.DrawSkybox(cam, rt.colorBuffer, depthTexture.depthBuffer);
// 将rt绘制到cam.targetTexture，cam.targetTexture如果为null，则绘制到屏幕上
Graphics.Blit(rt, cam.targetTexture);
}
private void OnPostRender()
{
Camera cam = Camera.current;
if (screenHeight != cam.pixelHeight * superSample || screenWidth != cam.pixelWidth * superSample)
{
screenHeight = (int)(cam.pixelHeight * superSample);
screenWidth = (int)(cam.pixelWidth * superSample);
ReSize(cameraTarget, screenWidth, screenHeight);
ReSize(depthTexture, screenWidth, screenHeight);
foreach (var i in GBufferTextures)
{
ReSize(i, screenWidth, screenHeight);
}
for (int i = 0; i < GBuffers.Length; ++i)
{
GBuffers[i] = GBufferTextures[i].colorBuffer;
}
}
Shader.SetGlobalTexture(_DepthTexture, depthTexture);
Matrix4x4 proj = GL.GetGPUProjectionMatrix(cam.projectionMatrix, false);
Matrix4x4 vp = proj * cam.worldToCameraMatrix;
Matrix4x4 invvp = vp.inverse;
Shader.SetGlobalMatrix(_InvVP, invvp);
CullMesh.UpdateFrame(cam, ref invvp, transform.position);
SortMesh.UpdateFrame();
JobHandle cullhandle = CullMesh.Schedule();
JobHandle sortHandle = SortMesh.Schedule(cullhandle);
JobHandle.ScheduleBatchedJobs();
for (int i = 0; i < gbufferIDs.Length; ++i)
{
Shader.SetGlobalTexture(gbufferIDs[i], GBufferTextures[i]);
}
Graphics.SetRenderTarget(GBuffers, depthTexture.depthBuffer);
GL.Clear(true, true, Color.black);
//Start Draw Mesh
deferredMaterial.SetPass(0);
sortHandle.Complete();
for (int i = 0; i < SortMesh.sorts.Length; ++i)
{
DrawElements(ref SortMesh.sorts[i]);
}
lighting.DrawLight(GBufferTextures, gbufferIDs, cameraTarget, cam);
//End Deferred Lighting
skyDraw.DrawSkybox(cam, cameraTarget.colorBuffer, depthTexture.depthBuffer);
Graphics.Blit(cameraTarget, cam.targetTexture);
}