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此代码创建一个非零的alpha通道的纹理。XNA。的Texture2D。 SetData的。错误的Alpha香奈尔
Texture2D result = new Texture2D(Program.MainThread.GraphicsDevice, (Int32)texture_size, (Int32)texture_size);
Color[ ] colorData = new Color[result.Width * result.Height];
for (UInt32 x = 0; x < result.Width; x++) {
for (UInt32 y = 0; y < result.Height; y++) {
UInt32 index = (UInt32)(x * result.Width + y);
colorData[index] = new Color(1f, 0f, 0f, 0f);
}
}
result.SetData(colorData);
颜色变得稍微透明。但是,大约为0.5f的值。这是为什么发生?
P.S. Color.Transparent正常工作,但我必须通过编程计算的alpha通道,例如:
colorData[index] = new Color(1f, 0f, 0f, 1f - temp);