void plPassMtl::GetInterpVtxValue(int channel, ShadeContext &sc, Point3 &val)
{
Mesh *mesh = sc.globContext->GetRenderInstance(sc.NodeID())->mesh;
if (mesh != nil)
{
Face *maxFace = &mesh->faces[ sc.FaceNumber() ];
UVVert *map = mesh->mapVerts(channel);
if (map != nil)
{
Point3 p0 = map[maxFace->getVert( 0 )];
Point3 p1 = map[maxFace->getVert( 1 )];
Point3 p2 = map[maxFace->getVert( 2 )];
Point3 interp = sc.BarycentricCoords();
val.x = interp.x * p0.x + interp.y * p1.x + interp.z * p2.x;
val.y = interp.x * p0.y + interp.y * p1.y + interp.z * p2.y;
val.z = interp.x * p0.z + interp.y * p1.z + interp.z * p2.z;
return;
}
}
// No value defined... set default.
if (channel == MAP_SHADING)
val.x = val.y = val.z = 0.0f;
else
val.x = val.y = val.z = 1.0f;
}
// Seed random number generator
void BerconGradient::seedRandomGen(ShadeContext& sc) {
int seed = 1;
if (previewMatIDMode) {
seed = sc.mtlNum;
} else {
if (p_randMat) {
seed += sc.mtlNum;
}
if (p_randObj) {
int hand = (int)sc.Node()->GetHandle();
seed += hand*(hand*hand*15731 + 789221);
}
if (p_randPar) {
Object *ob = sc.GetEvalObject();
if (ob && ob->IsParticleSystem()) {
ParticleObject *obj = (ParticleObject*)ob;
IChkMtlAPI* chkMtlAPI = static_cast<IChkMtlAPI*>(obj->GetInterface(I_NEWMTLINTERFACE));
if ((chkMtlAPI && chkMtlAPI->SupportsParticleIDbyFace())) {
int id = chkMtlAPI->GetParticleFromFace(sc.FaceNumber());
seed += id*(id*id*571 + 789221);
}
}
}
if (p_randTile) {
seed += (int)(sc.UVW(99).z);
}
}
seed *= p_seed;
srand(seed*(seed*seed*15731 + 789221));
}
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);
}
AColor CrackVisualizer::EvalColor(ShadeContext& sc)
{
if (gbufID) sc.SetGBufferID(gbufID);
float dist = pblock->GetFloat( pb_spin, sc.CurTime() )*0.1f;
float distSquared = dist*dist;
float minDist = 9999999999999999999.0f;
// we must be sure that minDist is a value greater than dist
// ...
//AColor edgeColor = AColor (1.0f,0.0f,0.0f,1.0f);
AColor edgeColor = pblock->GetAColor( pb_color, sc.CurTime() );
edgeColor.a = 1.0f;
int nodeID = sc.NodeID();
if( !sc.globContext )
return AColor (0.0f,0.0f,0.0f,0.0f);
RenderInstance* inst = sc.globContext->GetRenderInstance(nodeID);
if( (inst==NULL) || (inst->mesh==NULL) || NULL == inst->mesh->faces || inst->mesh->getNumFaces() <= sc.FaceNumber() )
{
return AColor (0.0f,0.0f,0.0f,0.0f);
}
// if an entry for the current nodeID doesnt exist
if( adjBoundaryEdges.find( nodeID ) == adjBoundaryEdges.end() )
// build the table
findAdjBoundaryEdges( nodeID, inst );
int faceIndex = sc.FaceNumber();
Face& f = inst->mesh->faces[faceIndex];
// compute Position of p
Point3 bary = sc.BarycentricCoords();
Point3 p = bary[0]*inst->mesh->getVert(f.getVert(0)) + bary[1]*inst->mesh->getVert(f.getVert(1)) + bary[2]*inst->mesh->getVert(f.getVert(2));
// p is not close to any boundary edge
// check if p close to any vertex which neighbours a boundaryedge from another triangle
for( int i=0; i<3; ++i )
{
// if wireframe
if(0)
{
DWORD edgeIdx = f.GetEdgeIndex( f.getVert(i), f.getVert((i+1)%3) );
// get vertex positions
Point3 v0 = inst->mesh->getVert(f.getVert(i));
Point3 v1 = inst->mesh->getVert(f.getVert(i+1)%3);
// compute distance p <-> edge v0, v1
//float edgeDistance = distancePointLine( p, v0, v1 );
float edgeDistance = Dist3DPtToLine( &p, &v0, &v1 );
edgeDistance = edgeDistance*edgeDistance;
// if distance of p is closer then 1/10 of the distance of v2 to that edge
if( edgeDistance < minDist )
minDist = edgeDistance;
}
// if there is any incident boundary edge to the current vertex, than we know that it is a
// boundary vertex
if( !adjBoundaryEdges[nodeID][f.getVert(i)].empty() )
{
// current vertex is a boundary vertex
// comute distance of p to that vertex
float vertexDistance = (inst->mesh->getVert( f.getVert(i) ) - p).LengthSquared();
if( vertexDistance < minDist )
minDist = vertexDistance;
// check all boundary edges which are adjacent to the vertex and may
// come from other faces
for( int j = 0; j<adjBoundaryEdges[nodeID][f.getVert(i)].size(); ++j )
{
// compute distance to that edge
Point3 v0 = inst->mesh->getVert( adjBoundaryEdges[nodeID][f.getVert(i)][j].first );
Point3 v1 = inst->mesh->getVert( adjBoundaryEdges[nodeID][f.getVert(i)][j].second );
// compute dotproduct
Point3 vec = p - v0;
Point3 direction = Normalize( v1 - v0 );
float maxLength = Length( v1 - v0 );
float dp = DotProd( vec, direction );
if( (dp<0.0f)||(dp>maxLength) )
continue;
float edgeDistance = LengthSquared( vec - dp*direction );
if( edgeDistance < minDist )
minDist = edgeDistance;
}
}
}
if( minDist < distSquared )
return edgeColor;
return AColor (0.0f,0.0f,0.0f,0.0f);}