具有多摄像头Unity3D的OnPostRender

Question

我正在尝试使用GL & OnPostRender在Unity3D中渲染线条。如果我只有一个相机就可以了，但是如果我有多个相机( oculus裂缝需要)，不管我试了什么，我都不能在两个相机视口中渲染线条。我已经尝试将脚本附加到两个相机-设置视口等，但没有工作。如果我将脚本附加到两个相机，则会为每个相机调用一次OnPostRender，但只绘制最后一个。如果我只将脚本附加到一个相机，并将视口设置为第二个相机，我无法让liones在第二个相机中绘制。以下是我认为应该有效的方法：

Rect[] viewports;

            Camera[] cameras = null;
            if (Params.riftEnabled)
            {
                viewports = new Rect[2];
                viewports[0] = new Rect(0, 0, Screen.width / 2, Screen.height);
                viewports[1] = viewports[0]; // new Rect(Screen.width / 2, 0, Screen.width / 2, Screen.height);
                GameObject ovrCameraController = (GameObject)GameObject.FindGameObjectWithTag("ovrcamera");
                cameras = (Camera[])ovrCameraController.GetComponentsInChildren<Camera>();

            }
            else
            {
                viewports = new Rect[1];
                viewports[0] = new Rect(0, 0, Screen.width, Screen.height);
                cameras = new Camera[1];
                cameras[0] = GameObject.FindObjectOfType<Camera>();
            }

            for (int i = 0; i < viewports.Length; i++)
            {
                SteeringManager.PrintVector("Cam " + i, cameras[i].transform.position);
                GL.PushMatrix();
                lineMaterial.SetPass(0);                                        
                GL.modelview = cameras[i].worldToCameraMatrix;
                GL.LoadProjectionMatrix(cameras[i].projectionMatrix);
                GL.Viewport(viewports[i]);
                lineMaterial.SetPass(0);
                GL.Begin(GL.LINES);
                foreach (Line line in lines)
                {
                     GL.Color(line.color);
                     GL.Vertex3(line.start.x, line.start.y, line.start.z);
                     GL.Vertex3(line.end.x, line.end.y, line.end.z);
                }
                GL.End();
                GL.PopMatrix();
            }

Answer 1

只需在OnPostRender函数中添加your ()；即可。

function OnPostRenderer() {
    yield WaitForEndOfFrame();

    for (var i : int = 0; i < viewports.Length; i++)
    {
    GL.PushMatrix();
    lineMaterial.SetPass(0);                                    
    GL.modelview = cameras[i].worldToCameraMatrix;
    GL.LoadProjectionMatrix(cameras[i].projectionMatrix);
    GL.Viewport(viewports[i]);

    GL.Color(Color.white);
    GL.Begin(GL.LINES);
    for (var p : Vector3 in points) {
         GL.Vertex3(...);
         GL.Vertex3(...);
        }
    GL.End();
    GL.PopMatrix();
    }
}

然后将这个脚本附加到两个摄像头，它应该可以工作。