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Implement LINE primitives in glb exporter #864

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This commit is contained in:
Thomas Krijnen
2020-06-07 16:39:23 +02:00
parent 91bfd116e8
commit 603cf011c3
1 changed files with 23 additions and 8 deletions
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src/serializers/GltfSerializer.cpp
+23 -8
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@@ -189,8 +189,21 @@ void GltfSerializer::write(const IfcGeom::TriangulationElement<real_t>* o) {
auto mid1 = o->geometry().material_ids().begin();
auto mid0 = mid1;
auto fid0 = o->geometry().faces().begin();
std::vector<int>::const_iterator fid0;
int stride;
int primitive_type;
if (!o->geometry().faces().empty()) {
stride = 3;
fid0 = o->geometry().faces().begin();
primitive_type = PRIM_TRIANGLES;
} else {
stride = 2;
fid0 = o->geometry().edges().begin();
primitive_type = PRIM_LINES;
}
json mesh;
mesh["name"] = o->geometry().id();
@@ -206,14 +219,14 @@ void GltfSerializer::write(const IfcGeom::TriangulationElement<real_t>* o) {
if ((mid1 == o->geometry().material_ids().end()) || (*mid1 != *mid0)) {
auto n = std::distance(mid0, mid1);
auto fid1 = fid0 + n * 3;
auto fid1 = fid0 + n * stride;
auto idx_range = std::minmax_element(fid0, fid1);
const auto& idx_begin = *idx_range.first;
const auto& idx_end = *idx_range.second + 1;
std::vector<int> idx_transformed;
idx_transformed.reserve((n * 3));
idx_transformed.reserve((n * stride));
std::transform(fid0, fid1, std::back_inserter(idx_transformed), [idx_begin](int i) {
return i - idx_begin;
});
@@ -226,12 +239,14 @@ void GltfSerializer::write(const IfcGeom::TriangulationElement<real_t>* o) {
std::vector<float> vf(vbegin + idx_begin * 3, vbegin + idx_end * 3);
primitive["attributes"]["POSITION"] = write_accessor<3U>(json_, tmp_fstream2_, vf.begin(), vf.end());
auto nbegin = o->geometry().normals().begin();
std::vector<float> nf(nbegin + idx_begin * 3, nbegin + idx_end * 3);
primitive["attributes"]["NORMAL"] = write_accessor<3U>(json_, tmp_fstream2_, nf.begin(), nf.end());
if (o->geometry().normals().size()) {
auto nbegin = o->geometry().normals().begin();
std::vector<float> nf(nbegin + idx_begin * 3, nbegin + idx_end * 3);
primitive["attributes"]["NORMAL"] = write_accessor<3U>(json_, tmp_fstream2_, nf.begin(), nf.end());
}
primitive["material"] = writeMaterial(o->geometry().materials()[*mid0]);
primitive["mode"] = PRIM_TRIANGLES;
primitive["mode"] = primitive_type;
mesh["primitives"].push_back(primitive);