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extend texture mapping to meshes

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wmayer
2019-09-24 17:19:15 +02:00
parent c8be77f893
commit bd6da5699e
2 changed files with 82 additions and 4 deletions
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71
src/Mod/Mesh/App/MeshTexture.cpp
View File

@@ -46,6 +46,77 @@ MeshTexture::MeshTexture(const Mesh::MeshObject& mesh, const MeshCore::Material
}
}
void MeshTexture::apply(const Mesh::MeshObject& mesh, const App::Color& defaultColor, MeshCore::Material &material)
{
// copy the color values because the passed material could be the same instance as 'materialRefMesh'
std::vector<App::Color> textureColor = materialRefMesh.diffuseColor;
material.diffuseColor.clear();
material.binding = MeshCore::MeshIO::OVERALL;
if (kdTree.get()) {
// the points of the current mesh
std::vector<App::Color> diffuseColor;
const MeshCore::MeshPointArray& points = mesh.getKernel().GetPoints();
const MeshCore::MeshFacetArray& facets = mesh.getKernel().GetFacets();
if (binding == MeshCore::MeshIO::PER_VERTEX) {
diffuseColor.reserve(points.size());
for (size_t index=0; index<points.size(); index++) {
unsigned long pos = kdTree->FindExact(points[index]);
if (pos < countPointsRefMesh) {
diffuseColor.push_back(textureColor[pos]);
}
else {
diffuseColor.push_back(defaultColor);
}
}
if (diffuseColor.size() == points.size()) {
material.diffuseColor.swap(diffuseColor);
material.binding = MeshCore::MeshIO::PER_VERTEX;
}
}
else if (binding == MeshCore::MeshIO::PER_FACE) {
// the values of the map give the point indices of the original mesh
std::vector<unsigned long> pointMap;
pointMap.reserve(points.size());
for (size_t index=0; index<points.size(); index++) {
unsigned long pos = kdTree->FindExact(points[index]);
if (pos < countPointsRefMesh) {
pointMap.push_back(pos);
}
else {
pointMap.push_back(ULONG_MAX);
}
}
// now determine the facet indices of the original mesh
if (pointMap.size() == points.size()) {
diffuseColor.reserve(facets.size());
for (auto it : facets) {
unsigned long index1 = pointMap[it._aulPoints[0]];
unsigned long index2 = pointMap[it._aulPoints[1]];
unsigned long index3 = pointMap[it._aulPoints[2]];
if (index1 != ULONG_MAX && index2 != ULONG_MAX && index3 != ULONG_MAX) {
std::vector<unsigned long> found = refPnt2Fac->GetIndices(index1, index2, index3);
if (found.size() == 1) {
diffuseColor.push_back(textureColor[found.front()]);
}
}
else {
diffuseColor.push_back(defaultColor);
}
}
}
if (diffuseColor.size() == facets.size()) {
material.diffuseColor.swap(diffuseColor);
material.binding = MeshCore::MeshIO::PER_FACE;
}
}
}
}
void MeshTexture::apply(const Mesh::MeshObject& mesh, MeshCore::Material &material)
{
// copy the color values because the passed material could be the same instance as 'materialRefMesh'

15
src/Mod/Mesh/App/MeshTexture.h
View File

@@ -36,8 +36,8 @@ namespace Mesh
/*! The MeshTexture class.
This algorithm is useful to update the material after a mesh has been modified
by removing points or facets. It can't be used if the coordinates of points have
changed or if new points have been added.
by removing points or facets. If the coordinates of points have changed or if
new points have been added then a pre-defined color will be set.
@author Werner Mayer
*/
class MeshExport MeshTexture
@@ -48,8 +48,15 @@ public:
*/
MeshTexture(const Mesh::MeshObject& mesh, const MeshCore::Material &material);
/*!
The \a mesh must be a sub-set of the mesh passed to the constructor. This means
that points or facets can be removed but neither changed nor new points added.
Find common points or facets of this to the original mesh. For points or facets
that don't match \a defaultColor will be used instead, otherwise the color of the
original material is used.
*/
void apply(const Mesh::MeshObject& mesh, const App::Color& defaultColor, MeshCore::Material &material);
/*!
Find common points or facets of this to the original mesh and use the color of the original material.
If for a point of \a mesh no matching point of the original mesh can be found the texture mapping will
fail.
*/
void apply(const Mesh::MeshObject& mesh, MeshCore::Material &material);