private void init()
{
if (cam == null)
{
cam = GetComponent <Camera> ();
}
if (fog == null)
{
fog = GetComponent <UnderWaterFog> ();
}
if (cam.transform.position.y >= fog.height)
{
fog.fogColor.a = 0f;
}
}
private void OnRenderImage(RenderTexture source, RenderTexture destination)
{
if (!this.CheckResources())
{
Graphics.Blit(source, destination);
return;
}
Camera component = base.GetComponent <Camera>();
Transform transform = component.transform;
float nearClipPlane = component.nearClipPlane;
float farClipPlane = component.farClipPlane;
float fieldOfView = component.fieldOfView;
float aspect = component.aspect;
Matrix4x4 identity = Matrix4x4.identity;
float num = fieldOfView * 0.5f;
Vector3 b = transform.right * nearClipPlane * Mathf.Tan(num * 0.017453292f) * aspect;
Vector3 b2 = transform.up * nearClipPlane * Mathf.Tan(num * 0.017453292f);
Vector3 vector = transform.forward * nearClipPlane - b + b2;
float d = vector.magnitude * farClipPlane / nearClipPlane;
vector.Normalize();
vector *= d;
Vector3 vector2 = transform.forward * nearClipPlane + b + b2;
vector2.Normalize();
vector2 *= d;
Vector3 vector3 = transform.forward * nearClipPlane + b - b2;
vector3.Normalize();
vector3 *= d;
Vector3 vector4 = transform.forward * nearClipPlane - b - b2;
vector4.Normalize();
vector4 *= d;
identity.SetRow(0, vector);
identity.SetRow(1, vector2);
identity.SetRow(2, vector3);
identity.SetRow(3, vector4);
Vector3 position = transform.position;
float num2 = position.y - this.height;
float z = (num2 <= 0f) ? 1f : 0f;
this.fogMaterial.SetColor("_Color", this.fogColor);
this.fogMaterial.SetMatrix("_FrustumCornersWS", identity);
this.fogMaterial.SetVector("_CameraWS", position);
this.fogMaterial.SetVector("_HeightParams", new Vector4(this.height, num2, z, this.heightDensity * 0.5f));
this.fogMaterial.SetVector("_DistanceParams", new Vector4(-Mathf.Max(this.startDistance, 0f), 1f, 0f, 0f));
FogMode fogMode = RenderSettings.fogMode;
float num3 = this.heightDensity;
float fogStartDistance = RenderSettings.fogStartDistance;
float fogEndDistance = RenderSettings.fogEndDistance;
bool flag = fogMode == FogMode.Linear;
float num4 = flag ? (fogEndDistance - fogStartDistance) : 0f;
float num5 = (Mathf.Abs(num4) > 0.0001f) ? (1f / num4) : 0f;
Vector4 value;
value.x = num3 * 1.2011224f;
value.y = num3 * 1.442695f;
value.z = (flag ? (-num5) : 0f);
value.w = (flag ? (fogEndDistance * num5) : 0f);
this.fogMaterial.SetVector("_SceneFogParams", value);
this.fogMaterial.SetVector("_SceneFogMode", new Vector4((float)fogMode, 0f, 0f, 0f));
UnderWaterFog.CustomGraphicsBlit(source, destination, this.fogMaterial, 0);
}