我正在实现一个仿真层。除了模板的东西(我的阴影重叠)之外,其他一切都有效。
我只是想知道我是否在逻辑上做事 - 如果我正在做出正确的结论/假设:
case D3DRS_STENCILENABLE:
glAble(GL_STENCIL_TEST, value);
break;
case D3DRS_STENCILFAIL:
sStencilFail = glFromD3DSTENCILOP((D3DSTENCILOP)value);
AssertGL(glStencilOp(sStencilFail, sStencilPassDepthFail, sStencilPassDepthPass));
break;
case D3DRS_STENCILZFAIL:
sStencilPassDepthFail = glFromD3DSTENCILOP((D3DSTENCILOP)value);
AssertGL(glStencilOp(sStencilFail, sStencilPassDepthFail, sStencilPassDepthPass));
break;
case D3DRS_STENCILPASS:
sStencilPassDepthPass = glFromD3DSTENCILOP((D3DSTENCILOP)value);
AssertGL(glStencilOp(sStencilFail, sStencilPassDepthFail, sStencilPassDepthPass));
break;
case D3DRS_STENCILFUNC:
sStencilFunc = glFromD3DCMPFUNC((D3DCMPFUNC)value);
AssertGL(glStencilFunc(sStencilFunc, sStencilRef, sStencilValueMask));
break;
case D3DRS_STENCILREF:
sStencilRef = value;
AssertGL(glStencilFunc(sStencilFunc, sStencilRef, sStencilValueMask));
break;
case D3DRS_STENCILMASK:
sStencilValueMask = value;
AssertGL(glStencilFunc(sStencilFunc, sStencilRef, sStencilValueMask));
break;
case D3DRS_STENCILWRITEMASK:
AssertGL(glStencilMask(value));
break;
以下是上面使用的。glAble() 只是 glEnable/glDisable 的包装器。
static GLenum glFromD3DCMPFUNC(D3DCMPFUNC value) {
return(GL_NEVER + value - 1);
}
static GLenum glFromD3DSTENCILOP(D3DSTENCILOP value) {
switch (value) {
case D3DSTENCILOP_KEEP: return(GL_KEEP);
case D3DSTENCILOP_ZERO: return(GL_ZERO);
case D3DSTENCILOP_REPLACE: return(GL_REPLACE);
case D3DSTENCILOP_INVERT: return(GL_INVERT);
case D3DSTENCILOP_INCRSAT:
case D3DSTENCILOP_INCR:
return(GL_INCR);
case D3DSTENCILOP_DECRSAT:
case D3DSTENCILOP_DECR:
return(GL_DECR);
default: Assert(!"Unsupported!"); return(0);
}
}