我的古董顯卡很操蛋，好端端的shader，傳骨骼矩陣進(jìn)去，硬是沒反應(yīng)。。
尋尋覓覓，找到了 NVIDIA SDK 的example，終于解決了。
難道我的顯卡不支持
BLENDINDICES和BLENDWEIGHT?
把
BLENDINDICES和BLENDWEIGHT用TEXCOORD[n]表示才正常。。
不說廢話，直接上代碼。
matrix?ViewProjMatrix;
float4x3????bones[70]?:?WORLDMATRIXARRAY;
struct?VS_INPUT
{
float3?Position??:?POSITION;
float3?Normal????:?NORMAL0;
float2?TexCoord0?:?TEXCOORD0;
float4?Weights:TEXCOORD1;
float4?Indices:TEXCOORD2;
};
struct?VS_OUTPUT
{
float4??Pos?????:?POSITION;
float3??Diffuse?:?COLOR;
float2??Tex0????:?TEXCOORD0;
};
VS_OUTPUT?main(VS_INPUT?input)
{
VS_OUTPUT?output?=?(VS_OUTPUT)0;
float3??????Normal?=?0.0f;????
float?i;????????//?Index?into?matrix?palette
float4?inPos;
inPos.xyz?=?input.Position;
inPos.w?=?1;
float3?tempPos,?tempNormal;
/////////////////////////////////////////////////////////////////////
????//?FIRST?BONE
//?We?don't?worry?about?the?ELSE?condition?because?we?defined?the?
//?initial?conditions.
//?grab?first?bone?matrix
????i?=?input.Indices.x;
//?First?transformed?position?and?normal
????tempPos?=?mul(inPos,?bones[i])?*?input.Weights.x;
tempNormal?=?mul(input.Normal,?(float3x3)bones[i])?*?input.Weights.x;
/////////////////////////////////////////////////////////////////////
????//?SECOND?BONE
//?Next?bone.
i?=?input.Indices.y;
//?Add?second?transformed?position?and?normal
????tempPos?+=?mul(inPos,?bones[i])?*?input.Weights.y;
tempNormal?+=?mul(input.Normal,?(float3x3)bones[i])?*?input.Weights.y;
/////////////////////////////////////////////////////////////////////
????//?THIRD?BONE
//?Note?we?only?skin?the?normal?by?the?first?two?bones,?these?are?by?
//?far?the?most?significant.
i?=?input.Indices.z;
//?Add?third?transformed?position?only
????tempPos?+=?mul(inPos,?bones[i])?*?input.Weights.z;
/////////////////////////////////////////////////////////////////////
????//?FOURTH?BONE
i?=?input.Indices.w;
//?Add?fourth?transformed?position?only
????tempPos?+=?mul(inPos,?bones[i])?*?input.Weights.w;
//?normalize?normals
????Normal?=?normalize(tempNormal);
//OUT.Diffuse.xyz?=?max(dot(Normal,?lhtDir),?0).xxx;
????output.Diffuse.x=1;
output.Diffuse.y=1;
output.Diffuse.z=1;
//?copy?the?input?texture?coordinate?through
????output.Tex0??=?input.TexCoord0.xy;
float4?finalPos;
finalPos.xyz?=?tempPos;
finalPos.w?=?1;
//?Transform?the?final?skinned?position
????output.Pos?=?mul(finalPos,?ViewProjMatrix);
return?output;
}