/// <summary>
/// Refraction RenderTexture
/// </summary>
private void DrawRefractionRenderTexture(Camera cam)
{
CreateRenderTexAndCam(cam, ref _refractionRenderTex, ref _refractionCamera);
WaterHelper.CloneCameraModes(cam, _refractionCamera);
Vector3 pos = transform.position;
Vector3 normal = transform.up;
Matrix4x4 projection = cam.worldToCameraMatrix;
projection *= Matrix4x4.Scale(new Vector3(1, Mathf.Clamp(1 - RefractionAngle, 0.001f, 1), 1));
_refractionCamera.worldToCameraMatrix = projection;
Vector4 clipPlane = WaterHelper.CameraSpacePlane(_refractionCamera, pos, normal, -1.0f, 0);
projection = cam.projectionMatrix;
/*projection[2] = clipPlane.x + projection[3];//x
* projection[6] = clipPlane.y + projection[7];//y
* projection[10] = clipPlane.z + projection[11];//z
* projection[14] = clipPlane.w + projection[15];//w*
* _refractionCamera.projectionMatrix = projection;*/
_refractionCamera.projectionMatrix = WaterHelper.CalculateObliqueMatrix(projection, clipPlane);
_refractionCamera.cullingMask = ~(1 << 4) & Layers.value; // never render water layer
_refractionCamera.targetTexture = _refractionRenderTex;
_refractionCamera.transform.position = cam.transform.position;
_refractionCamera.transform.eulerAngles = cam.transform.eulerAngles;
_refractionCamera.Render();
}
private void DrawReflectionRenderTexture(Camera cam)
{
Vector3 pos = transform.position;
Vector3 normal = transform.up;
CreateRenderTexAndCam(cam, ref _reflectionRenderTex, ref _reflectionCamera);
WaterHelper.CloneCameraModes(cam, _reflectionCamera);
float d = -Vector3.Dot(normal, pos) - reflectClipPlaneOffset;
Vector4 reflectionPlane = new Vector4(normal.x, normal.y, normal.z, d);
Matrix4x4 reflection = WaterHelper.CalculateReflectionMatrix(Matrix4x4.zero, reflectionPlane);
Vector3 oldpos = cam.transform.position;
Vector3 newpos = reflection.MultiplyPoint(oldpos);
_reflectionCamera.worldToCameraMatrix = cam.worldToCameraMatrix * reflection;
// Setup oblique projection matrix so that near plane is our reflection
// plane. This way we clip everything below/above it for free.
Vector4 clipPlane = WaterHelper.CameraSpacePlane(_reflectionCamera, pos, normal, 1.0f, reflectClipPlaneOffset);
Matrix4x4 projection = cam.projectionMatrix;
projection = WaterHelper.CalculateObliqueMatrix(projection, clipPlane);
//Matrix4x4 projection = cam.CalculateObliqueMatrix(clipPlane);
_reflectionCamera.projectionMatrix = projection;
_reflectionCamera.cullingMask = ~(1 << 4) & Layers.value; // never render water layer
_reflectionCamera.targetTexture = _reflectionRenderTex;
GL.invertCulling = true;
_reflectionCamera.transform.position = newpos;
Vector3 euler = cam.transform.eulerAngles;
_reflectionCamera.transform.eulerAngles = new Vector3(0, euler.y, euler.z);
_reflectionCamera.Render();
_reflectionCamera.transform.position = oldpos;
GL.invertCulling = false;
}