出于某种原因,以下HLSL代码在输出窗口中返回：

error X8000 : D3D11 Internal Compiler error : Invalid Bytecode: Invalid operand type for operand #1 of opcode #86 (counts are 1-based).

这是导致问题的HLSL中的函数：

// Projects a sphere diameter large in screen space to calculate desired tesselation factor
float SphereToScreenSpaceTessellation(float3 p0,float3 p1,float diameter)
{
float3 centerPoint = (p0 + p1) * 0.5f;

float4 point0 = mul( float4(centerPoint,1.0f),gTileWorldView);

float4 point1 = point0;
point1.x += diameter;

float4 point0ClipSpace = mul(point0,gTileProj);
float4 point1ClipSpace = mul(point1,gTileProj);

point0ClipSpace /= point0ClipSpace.w;
point1ClipSpace /= point1ClipSpace.w;

point0ClipSpace.xy *= gScreenSize;
point1ClipSpace.xy *= gScreenSize;

float projSizeOfEdge = distance(point0ClipSpace,point1ClipSpace);

float result = projSizeOfEdge / gTessellatedTriWidth;

return clamp(result,64);
}

我把它缩小到可能是“mul”内在的地步.我们已经从代码中取出所有内容并试图返回一个像这样的临时变量,它工作正常：

float SphereToScreenSpaceTessellation(float3 p0,float diameter)
{

float temp = 0;

float3 centerPoint = (p0 + p1) * 0.5f;

float4 point0 = mul( float4(centerPoint,point1ClipSpace);

float result = projSizeOfEdge / gTessellatedTriWidth;

return temp;
//return clamp(result,64);
}

如果有人想知道：

gTileWorldView,gTileProj are float4x4's in a .hlsli file
gScreenSize is a float2 in a .hlsli file.
gTessellatedTriWidth is a float in a .hlsli file.

以下函数与2011 NVidia着色器中的状态一样：http://dx11-xpr.googlecode.com/svn/trunk/XPR/Media/Effects/TerrainTessellation.fx

我尝试复制并粘贴他们的解决方案,用上面的变量替换他们的变量,并且列出了相同的错误.

我绝对难过,我需要帮助才能完成这项任务,请帮忙.