//重绘像素点
private void UpdatePixel(int x, int y, float mapValue)
{
//单格采样宽度upsample * upsample
for (int gy = 0; gy < m_UpSample; gy++)
{
for (int gx = 0; gx < m_UpSample; gx++)
{
FogMaskTexture.SetPixel(x * m_UpSample + gx, y * m_UpSample + gy, (mapValue / 255) * m_FogBaseMask);
}
}
}
//获得该点最终模糊值，由自身的外围矩阵依次运算并合成，例如4*4 依次对任一点进行该点的插值运算
private float GaussianBlur(int px, int py, int blurLength)//给定当前纹理坐标点
{
float v = 0;
for (int hDis = -blurLength; hDis <= blurLength; hDis++) //左下开始，上移
{
for (int wDis = -blurLength; wDis <= blurLength; wDis++) //右移
{
//获得距离x+w,y+h的点对x,y值的影响
v += FastGetWeight(wDis, hDis, blurLength)
* FogMaskTexture.GetPixel(Mathf.Clamp(px + wDis, 0, m_TexWidth - 1), Mathf.Clamp(py + hDis, 0, m_TexHeight - 1)).r;
}
}
return(v);
}
//应用纹理修改，模糊处理并发布到公共着色器通道
private void ApplyTextureAndSendToGlobal()
{
FogMaskTexture.Apply(false);
PostProcessingTexture();
SetGlobalFogMap();
}
