我们有一个 GLSL 片段着色器:但问题出在这段代码中
vec4 TFSelection(StrVolumeColorMap volumeColorMap , vec4 textureCoordinate)
{
vec4 finalColor = vec4(0.0);
if(volumeColorMap.TransferFunctions[0].numberOfBits == 0)
{
return texture(volumeColorMap.TransferFunctions[0].TransferFunctionID,textureCoordinate.x);
}
if(textureCoordinate.x == 0)
return finalColor;
float deNormalize = textureCoordinate.x *65535/*255*/;
for(int i = 0; i < volumeColorMap.TransferFunctions.length(); i++)
{
int NormFactor = volumeColorMap.TransferFunctions[i].startBit + volumeColorMap.TransferFunctions[i].numberOfBits;
float minval = CalculatePower(2, volumeColorMap.TransferFunctions[i].startBit);
if(deNormalize >= minval)
{
float maxval = CalculatePower(2, NormFactor);
if(deNormalize <maxval)
{
//float tempPower = CalculatePower(2 , NormFactor);
float coord = deNormalize /maxval/*tempPower*/;
return texture(volumeColorMap.TransferFunctions[i].TransferFunctionID,coord);
}
}
}
return finalColor;
}
当我们编译和链接着色器时,此消息记录:
Sampler 需要是统一的(全局或参数到 main),需要内联函数或解析条件表达式
进行简单的更改,例如着色器链接可能成功更改
float `coord = deNormalize /maxval
至
float coord = deNormalize .`
驱动程序:nvidia 320.49