VRML: add support for transparency.
nabijaczleweli
whitequark
parent
837628ea3e
commit
d9081b0b08
178
src/export.cpp
178
src/export.cpp
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@ -1174,6 +1174,14 @@ void SolveSpaceUI::ExportMeshAsThreeJsTo(FILE *f, const Platform::Path &filename
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// Export the mesh as a VRML text file / WRL.
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//-----------------------------------------------------------------------------
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void SolveSpaceUI::ExportMeshAsVrmlTo(FILE *f, const Platform::Path &filename, SMesh *sm) {
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struct STriangleSpan {
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STriangle *first, *past_last;
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STriangle *begin() const { return first; }
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STriangle *end() const { return past_last; }
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};
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std::string basename = filename.FileStem();
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for(auto & c : basename) {
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if(!(isalnum(c) || ((unsigned)c >= 0x80))) {
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@ -1185,88 +1193,114 @@ void SolveSpaceUI::ExportMeshAsVrmlTo(FILE *f, const Platform::Path &filename, S
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"#Exported from SolveSpace %s\n"
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"\n"
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"DEF %s Transform {\n"
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" children [\n"
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" Shape {\n"
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" appearance Appearance {\n"
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" material DEF %s_material Material {\n"
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" diffuseColor %f %f %f\n"
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" ambientIntensity %f\n"
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" transparency 0.0\n"
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" }\n"
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" }\n"
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" geometry IndexedFaceSet {\n"
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" colorPerVertex TRUE\n"
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" coord Coordinate { point [\n",
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" children [",
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PACKAGE_VERSION,
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basename.c_str(),
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basename.c_str(),
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SS.ambientIntensity,
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SS.ambientIntensity,
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SS.ambientIntensity,
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SS.ambientIntensity);
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basename.c_str());
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SPointList spl = {};
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for(const auto & tr : sm->l) {
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spl.IncrementTagFor(tr.a);
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spl.IncrementTagFor(tr.b);
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spl.IncrementTagFor(tr.c);
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}
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// Output all the vertices.
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for(auto sp : spl.l) {
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fprintf(f, " %f %f %f,\n",
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sp.p.x / SS.exportScale,
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sp.p.y / SS.exportScale,
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sp.p.z / SS.exportScale);
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}
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fputs(" ] }\n"
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" coordIndex [\n", f);
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// And now all the triangular faces, in terms of those vertices.
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for(const auto & tr : sm->l) {
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fprintf(f, " %d, %d, %d, -1,\n",
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spl.IndexForPoint(tr.a),
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spl.IndexForPoint(tr.b),
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spl.IndexForPoint(tr.c));
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}
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fputs(" ]\n"
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" color Color { color [\n", f);
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// Output triangle colors.
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std::vector<int> triangle_colour_ids;
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std::vector<RgbaColor> colours_present;
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for(const auto & tr : sm->l) {
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const auto colour_itr = std::find_if(colours_present.begin(), colours_present.end(),
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[&](const RgbaColor & c) {
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return c.Equals(tr.meta.color);
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});
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if(colour_itr == colours_present.end()) {
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fprintf(f, " %.10f %.10f %.10f,\n",
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tr.meta.color.redF(),
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tr.meta.color.greenF(),
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tr.meta.color.blueF());
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triangle_colour_ids.push_back(colours_present.size());
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colours_present.insert(colours_present.end(), tr.meta.color);
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} else {
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triangle_colour_ids.push_back(colour_itr - colours_present.begin());
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std::map<std::uint8_t, std::vector<STriangleSpan>> opacities;
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STriangle *start = sm->l.begin();
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std::uint8_t last_opacity = start->meta.color.alpha;
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for(auto & tr : sm->l) {
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if(tr.meta.color.alpha != last_opacity) {
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opacities[last_opacity].push_back(STriangleSpan{start, &tr});
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start = &tr;
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last_opacity = start->meta.color.alpha;
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}
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}
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opacities[last_opacity].push_back(STriangleSpan{start, sm->l.end()});
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fputs(" ] }\n"
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" colorIndex [\n", f);
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for(auto && op : opacities) {
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fprintf(f, "\n"
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" Shape {\n"
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" appearance Appearance {\n"
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" material DEF %s_material_%u Material {\n"
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" diffuseColor %f %f %f\n"
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" ambientIntensity %f\n"
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" transparency %f\n"
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" }\n"
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" }\n"
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" geometry IndexedFaceSet {\n"
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" colorPerVertex TRUE\n"
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" coord Coordinate { point [\n",
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basename.c_str(),
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(unsigned)op.first,
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SS.ambientIntensity,
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SS.ambientIntensity,
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SS.ambientIntensity,
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SS.ambientIntensity,
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1.f - ((float)op.first / 255.0f));
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for(auto colour_idx : triangle_colour_ids) {
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fprintf(f, " %d, %d, %d, -1,\n", colour_idx, colour_idx, colour_idx);
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SPointList spl = {};
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for(const auto & sp : op.second) {
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for(const auto & tr : sp) {
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spl.IncrementTagFor(tr.a);
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spl.IncrementTagFor(tr.b);
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spl.IncrementTagFor(tr.c);
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}
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}
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// Output all the vertices.
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for(auto sp : spl.l) {
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fprintf(f, " %f %f %f,\n",
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sp.p.x / SS.exportScale,
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sp.p.y / SS.exportScale,
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sp.p.z / SS.exportScale);
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}
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fputs(" ] }\n"
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" coordIndex [\n", f);
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// And now all the triangular faces, in terms of those vertices.
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for(const auto & sp : op.second) {
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for(const auto & tr : sp) {
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fprintf(f, " %d, %d, %d, -1,\n",
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spl.IndexForPoint(tr.a),
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spl.IndexForPoint(tr.b),
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spl.IndexForPoint(tr.c));
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}
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}
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fputs(" ]\n"
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" color Color { color [\n", f);
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// Output triangle colors.
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std::vector<int> triangle_colour_ids;
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std::vector<RgbaColor> colours_present;
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for(const auto & sp : op.second) {
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for(const auto & tr : sp) {
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const auto colour_itr = std::find_if(colours_present.begin(), colours_present.end(),
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[&](const RgbaColor & c) {
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return c.Equals(tr.meta.color);
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});
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if(colour_itr == colours_present.end()) {
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fprintf(f, " %.10f %.10f %.10f,\n",
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tr.meta.color.redF(),
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tr.meta.color.greenF(),
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tr.meta.color.blueF());
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triangle_colour_ids.push_back(colours_present.size());
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colours_present.insert(colours_present.end(), tr.meta.color);
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} else {
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triangle_colour_ids.push_back(colour_itr - colours_present.begin());
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}
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}
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}
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fputs(" ] }\n"
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" colorIndex [\n", f);
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for(auto colour_idx : triangle_colour_ids) {
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fprintf(f, " %d, %d, %d, -1,\n", colour_idx, colour_idx, colour_idx);
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}
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fputs(" ]\n"
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" }\n"
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" }\n", f);
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spl.Clear();
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}
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fputs(" ]\n"
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" }\n"
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" }\n"
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" ]\n"
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fputs(" ]\n"
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"}\n", f);
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spl.Clear();
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}
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//-----------------------------------------------------------------------------
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