AColor mrTwoSidedShader::EvalColor(ShadeContext& sc) {
// Provide a good default for this (for the material editor peview)...
// Use the front color for the top half of the screen the the back color
// for the bottom half.
if(m_mainPB != NULL) {
Point2 screenUV;
Point2 screenDUV;
sc.ScreenUV(screenUV, screenDUV);
// Front map is used for top part of the image
bool useFront = (screenUV.y > 0.5f);
TimeValue t = sc.CurTime();
BOOL mapOn = m_mainPB->GetInt(useFront ? kMainPID_FrontMapOn : kMainPID_BackMapOn, t);
if(mapOn) {
Texmap* map = m_mainPB->GetTexmap(useFront ? kMainPID_FrontMap : kMainPID_BackMap, t);
if(map != NULL) {
return map->EvalColor(sc);
}
}
// Return the color only
AColor col = m_mainPB->GetAColor(useFront ? kMainPID_FrontColor : kMainPID_BackColor, t);
return col;
}
return AColor(0,0,0);
}
AColor UVtex::EvalColor(ShadeContext& sc) {
if (gbufID) sc.SetGBufferID(gbufID);
#if MAX_RELEASE > 3100
Point3 uvw;
if (uvChannel < 0)
{
if (sc.InMtlEditor())
{
Point2 a, b;
sc.ScreenUV(a, b);
uvw = Point3(a.x, a.y, 0.0f);
} else if (sc.globContext != NULL && sc.NodeID() >= 0)
{
RenderInstance* ri = sc.globContext->GetRenderInstance(sc.NodeID());
Mesh* m = ri->mesh;
if (m->mapSupport(uvChannel))
{
Point3 bc = sc.BarycentricCoords();
int i = sc.FaceNumber();
UVVert* v = m->mapVerts(uvChannel);
TVFace* f = m->mapFaces(uvChannel);
uvw = v[f[i].t[0]] * bc.x +
v[f[i].t[1]] * bc.y +
v[f[i].t[2]] * bc.z;
} else {
uvw = Point3(0.0,0.0,0.0);
}
} else {
uvw = Point3(0.0,0.0,0.0);
}
} else {
uvw = sc.UVW(uvChannel);
}
#else
Point3 uvw = sc.UVW(uvChannel);
#endif
if (clampUVW) {
uvw.x = Clamp(uvw.x);
uvw.y = Clamp(uvw.y);
uvw.z = Clamp(uvw.z);
} else {
uvw.x = mod(uvw.x, 1.0000001f);
uvw.y = mod(uvw.y, 1.0000001f);
uvw.z = mod(uvw.z, 1.0000001f);
}
return EvalUVtex(uvw);
}