// Use this for initialization
void Start()
{
m_VRWorks = GetComponent <Camera>().GetComponent <NVIDIA.VRWorks>();
}
void OnRenderImage(RenderTexture source, RenderTexture destination)
{
if (CheckResources() == false || (!distanceFog && !heightFog))
{
Graphics.Blit(source, destination);
return;
}
CAMERA_NEAR = GetComponent <Camera>().nearClipPlane;
CAMERA_FAR = GetComponent <Camera>().farClipPlane;
CAMERA_FOV = GetComponent <Camera>().fieldOfView;
CAMERA_ASPECT_RATIO = GetComponent <Camera>().aspect;
Matrix4x4 frustumCorners = Matrix4x4.identity;
float fovWHalf = CAMERA_FOV * 0.5f;
Vector3 toRight = GetComponent <Camera>().transform.right *CAMERA_NEAR *Mathf.Tan(fovWHalf * Mathf.Deg2Rad) * CAMERA_ASPECT_RATIO;
Vector3 toTop = GetComponent <Camera>().transform.up *CAMERA_NEAR *Mathf.Tan(fovWHalf * Mathf.Deg2Rad);
Vector3 topLeft = (GetComponent <Camera>().transform.forward *CAMERA_NEAR - toRight + toTop);
float CAMERA_SCALE = topLeft.magnitude * CAMERA_FAR / CAMERA_NEAR;
topLeft.Normalize();
topLeft *= CAMERA_SCALE;
Vector3 topRight = (GetComponent <Camera>().transform.forward *CAMERA_NEAR + toRight + toTop);
topRight.Normalize();
topRight *= CAMERA_SCALE;
Vector3 bottomRight = (GetComponent <Camera>().transform.forward *CAMERA_NEAR + toRight - toTop);
bottomRight.Normalize();
bottomRight *= CAMERA_SCALE;
Vector3 bottomLeft = (GetComponent <Camera>().transform.forward *CAMERA_NEAR - toRight - toTop);
bottomLeft.Normalize();
bottomLeft *= CAMERA_SCALE;
frustumCorners.SetRow(0, topLeft);
frustumCorners.SetRow(1, topRight);
frustumCorners.SetRow(2, bottomRight);
frustumCorners.SetRow(3, bottomLeft);
var camPos = GetComponent <Camera>().transform.position;
float FdotC = camPos.y - height;
float paramK = (FdotC <= 0.0f ? 1.0f : 0.0f);
fogMaterial.SetMatrix("_FrustumCornersWS", frustumCorners);
fogMaterial.SetVector("_CameraWS", camPos);
fogMaterial.SetVector("_HeightParams", new Vector4(height, FdotC, paramK, heightDensity * 0.5f));
fogMaterial.SetVector("_DistanceParams", new Vector4(-Mathf.Max(startDistance, 0.0f), 0, 0, 0));
if (m_VRWorks == null)
{
m_VRWorks = GetComponent <Camera>().GetComponent <NVIDIA.VRWorks>();
}
NVIDIA.VRWorks.SetKeywords(fogMaterial);
var sceneMode = RenderSettings.fogMode;
var sceneDensity = RenderSettings.fogDensity;
var sceneStart = RenderSettings.fogStartDistance;
var sceneEnd = RenderSettings.fogEndDistance;
Vector4 sceneParams;
bool linear = (sceneMode == UnityEngine.FogMode.Linear);
float diff = linear ? sceneEnd - sceneStart : 0.0f;
float invDiff = Mathf.Abs(diff) > 0.0001f ? 1.0f / diff : 0.0f;
sceneParams.x = sceneDensity * 1.2011224087f; // density / sqrt(ln(2)), used by Exp2 fog mode
sceneParams.y = sceneDensity * 1.4426950408f; // density / ln(2), used by Exp fog mode
sceneParams.z = linear ? -invDiff : 0.0f;
sceneParams.w = linear ? sceneEnd * invDiff : 0.0f;
fogMaterial.SetVector("_SceneFogParams", sceneParams);
fogMaterial.SetInt("_SceneFogMode", (int)sceneMode);
int pass = 0;
if (distanceFog && heightFog)
{
pass = 0; // distance + height
}
else if (distanceFog)
{
pass = 1; // distance only
}
else
{
pass = 2; // height only
}
CustomGraphicsBlit(source, destination, fogMaterial, pass);
}
