void OnRenderImage(RenderTexture src, RenderTexture dest)
{
if (TargetMaterial != null)
{
Matrix4x4 frustumCorners = Matrix4x4.identity;
float fov = TargetCamera.fieldOfView;
float near = TargetCamera.nearClipPlane;
float aspect = TargetCamera.aspect;
float halfHeight = near * Mathf.Tan(fov * 0.5f * Mathf.Deg2Rad);
Vector3 toRight = CameraTransform.right * halfHeight * aspect;
Vector3 toTop = CameraTransform.up * halfHeight;
Vector3 topLeft = CameraTransform.forward * near + toTop - toRight;
float scale = topLeft.magnitude / near;
topLeft.Normalize();
topLeft *= scale;
Vector3 topRight = CameraTransform.forward * near + toRight + toTop;
topRight.Normalize();
topRight *= scale;
Vector3 bottomLeft = CameraTransform.forward * near - toTop - toRight;
bottomLeft.Normalize();
bottomLeft *= scale;
Vector3 bottomRight = CameraTransform.forward * near + toRight - toTop;
bottomRight.Normalize();
bottomRight *= scale;
frustumCorners.SetRow(0, bottomLeft);
frustumCorners.SetRow(1, bottomRight);
frustumCorners.SetRow(2, topRight);
frustumCorners.SetRow(3, topLeft);
TargetMaterial.SetMatrix("_FrustumCornersRay", frustumCorners);
TargetMaterial.SetFloat("_FogDensity", fogDensity);
TargetMaterial.SetColor("_FogColor", fogColor);
TargetMaterial.SetFloat("_FogStart", fogStart);
TargetMaterial.SetFloat("_FogEnd", fogEnd);
TargetMaterial.SetTexture("_NoiseTex", noiseTexture);
TargetMaterial.SetFloat("_FogXSpeed", fogXSpeed);
TargetMaterial.SetFloat("_FogYSpeed", fogYSpeed);
TargetMaterial.SetFloat("_NoiseAmount", noiseAmount);
Graphics.Blit(src, dest, TargetMaterial);
}
else
{
Graphics.Blit(src, dest);
}
}
void OnRenderImage(RenderTexture src, RenderTexture dest)
{
if (TargetMaterial != null)
{
TargetMaterial.SetFloat("_BlurSize", blurSize);
// 上一帧的矩阵
TargetMaterial.SetMatrix("_PreviousViewProjectionMatrix", previousViewProjectionMatrix);
// 投影矩阵 * 视角矩阵 ，用于给下一帧计算该帧时的位置
Matrix4x4 currentViewProjectionMatrix = TargetCamera.projectionMatrix * TargetCamera.worldToCameraMatrix;
// 矩阵取逆，用于计算该帧的位置
Matrix4x4 currentViewProjectionInverseMatrix = currentViewProjectionMatrix.inverse;
TargetMaterial.SetMatrix("_CurrentViewProjectionInverseMatrix", currentViewProjectionInverseMatrix);
previousViewProjectionMatrix = currentViewProjectionMatrix;
Graphics.Blit(src, dest, TargetMaterial);
}
else
{
Graphics.Blit(src, dest);
}
}
void Update()
{
var pInfos = shaderValues.GetType().GetFields();
foreach (var p in pInfos)
{
if (Attribute.IsDefined(p, typeof(ShaderValue)))
{
if (p.FieldType == typeof(Color))
{
foreach (Material TargetMaterial in TargetMaterials)
{
TargetMaterial.SetColor(p.Name, (Color)p.GetValue(shaderValues));
}
}
else if (p.FieldType == typeof(Color[]))
{
foreach (Material TargetMaterial in TargetMaterials)
{
TargetMaterial.SetColorArray(p.Name, (Color[])p.GetValue(shaderValues));
}
}
else if (p.FieldType == typeof(List <Color>))
{
foreach (Material TargetMaterial in TargetMaterials)
{
TargetMaterial.SetColorArray(p.Name, (List <Color>)p.GetValue(shaderValues));
}
}
else if (p.FieldType == typeof(float))
{
foreach (Material TargetMaterial in TargetMaterials)
{
TargetMaterial.SetFloat(p.Name, (float)p.GetValue(shaderValues));
}
}
else if (p.FieldType == typeof(float[]))
{
foreach (Material TargetMaterial in TargetMaterials)
{
TargetMaterial.SetFloatArray(p.Name, (float[])p.GetValue(shaderValues));
}
}
else if (p.FieldType == typeof(List <float>))
{
foreach (Material TargetMaterial in TargetMaterials)
{
TargetMaterial.SetFloatArray(p.Name, (List <float>)p.GetValue(shaderValues));
}
}
else if (p.FieldType == typeof(int))
{
foreach (Material TargetMaterial in TargetMaterials)
{
TargetMaterial.SetInt(p.Name, (int)p.GetValue(shaderValues));
}
}
else if (p.FieldType == typeof(bool))
{
foreach (Material TargetMaterial in TargetMaterials)
{
TargetMaterial.SetInt(p.Name, (bool)p.GetValue(shaderValues) ? 1 : 0);
}
}
else if (p.FieldType == typeof(Matrix4x4))
{
foreach (Material TargetMaterial in TargetMaterials)
{
TargetMaterial.SetMatrix(p.Name, (Matrix4x4)p.GetValue(shaderValues));
}
}
else if (p.FieldType == typeof(Matrix4x4[]))
{
foreach (Material TargetMaterial in TargetMaterials)
{
TargetMaterial.SetMatrixArray(p.Name, (Matrix4x4[])p.GetValue(shaderValues));
}
}
else if (p.FieldType == typeof(List <Matrix4x4>))
{
foreach (Material TargetMaterial in TargetMaterials)
{
TargetMaterial.SetMatrixArray(p.Name, (List <Matrix4x4>)p.GetValue(shaderValues));
}
}
else if (p.FieldType == typeof(string))
{
foreach (Material TargetMaterial in TargetMaterials)
{
TargetMaterial.SetOverrideTag(p.Name, (string)p.GetValue(shaderValues));
}
}
else if (p.FieldType == typeof(Texture2D))
{
foreach (Material TargetMaterial in TargetMaterials)
{
TargetMaterial.SetTexture(p.Name, (Texture2D)p.GetValue(shaderValues));
}
//a vector2 can be a vector, or a material offset or scale
//TODO: test this!
}
else if (p.FieldType == typeof(Vector2))
{
if (Attribute.IsDefined(p, typeof(TextureOffset)))
{
foreach (Material TargetMaterial in TargetMaterials)
{
TargetMaterial.SetTextureOffset(((TextureOffset)Attribute.GetCustomAttribute(p, typeof(TextureOffset))).Name, (Vector2)p.GetValue(shaderValues));
}
}
else if (Attribute.IsDefined(p, typeof(TextureScale)))
{
foreach (Material TargetMaterial in TargetMaterials)
{
TargetMaterial.SetTextureOffset(((TextureScale)Attribute.GetCustomAttribute(p, typeof(TextureScale))).Name, (Vector2)p.GetValue(shaderValues));
}
}
else
{
foreach (Material TargetMaterial in TargetMaterials)
{
TargetMaterial.SetVector(p.Name, (Vector2)p.GetValue(shaderValues));
}
}
}
else if (p.FieldType == typeof(Vector3))
{
foreach (Material TargetMaterial in TargetMaterials)
{
TargetMaterial.SetVector(p.Name, (Vector3)p.GetValue(shaderValues));
}
}
else if (p.FieldType == typeof(Vector4))
{
foreach (Material TargetMaterial in TargetMaterials)
{
TargetMaterial.SetVector(p.Name, (Vector4)p.GetValue(shaderValues));
}
}
else if (p.FieldType == typeof(Vector4[]))
{
foreach (Material TargetMaterial in TargetMaterials)
{
TargetMaterial.SetVectorArray(p.Name, (Vector4[])p.GetValue(shaderValues));
}
}
else if (p.FieldType == typeof(List <Vector4>))
{
foreach (Material TargetMaterial in TargetMaterials)
{
TargetMaterial.SetVectorArray(p.Name, (List <Vector4>)p.GetValue(shaderValues));
}
}
}
}
}
