59 lines
2.0 KiB
C++
59 lines
2.0 KiB
C++
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#include <set>
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#include "monochrome_mesh.h"
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MonochromeMesh::MonochromeMesh(const MonochromeMesh &mesh)
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{
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m_lineVertices = mesh.m_lineVertices;
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}
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MonochromeMesh::MonochromeMesh(MonochromeMesh &&mesh)
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{
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m_lineVertices = std::move(mesh.m_lineVertices);
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}
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MonochromeMesh::MonochromeMesh(const dust3d::Object &object)
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{
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std::set<std::pair<size_t, size_t>> halfEdges;
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for (const auto &face: object.triangleAndQuads) {
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if (3 == face.size()) {
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halfEdges.insert({face[0], face[1]});
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halfEdges.insert({face[1], face[0]});
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halfEdges.insert({face[1], face[2]});
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halfEdges.insert({face[2], face[1]});
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halfEdges.insert({face[2], face[0]});
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halfEdges.insert({face[0], face[2]});
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continue;
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}
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halfEdges.insert({face[0], face[1]});
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halfEdges.insert({face[1], face[0]});
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halfEdges.insert({face[1], face[2]});
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halfEdges.insert({face[2], face[1]});
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halfEdges.insert({face[2], face[3]});
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halfEdges.insert({face[3], face[2]});
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halfEdges.insert({face[3], face[0]});
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halfEdges.insert({face[0], face[3]});
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}
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m_lineVertices.reserve(halfEdges.size() * 2);
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for (const auto &halfEdge: halfEdges) {
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// For two halfedges shared one edge, only output one line
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if (halfEdge.first > halfEdge.second)
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continue;
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const auto &from = object.vertices[halfEdge.first];
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const auto &to = object.vertices[halfEdge.second];
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m_lineVertices.emplace_back(MonochromeOpenGLVertex {(GLfloat)from.x(), (GLfloat)from.y(), (GLfloat)from.z()});
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m_lineVertices.emplace_back(MonochromeOpenGLVertex {(GLfloat)to.x(), (GLfloat)to.y(), (GLfloat)to.z()});
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}
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}
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const MonochromeOpenGLVertex *MonochromeMesh::lineVertices()
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{
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if (m_lineVertices.empty())
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return nullptr;
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return &m_lineVertices[0];
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}
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int MonochromeMesh::lineVertexCount()
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{
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return (int)m_lineVertices.size();
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}
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