57 lines
1.1 KiB
C++
57 lines
1.1 KiB
C++
// This code is in the public domain -- castanyo@yahoo.es
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#include "nvmesh.h" // pch
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#include "Edge.h"
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#include "Vertex.h"
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#include "nvmath/Vector.inl"
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using namespace nv;
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using namespace HalfEdge;
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Vector3 Edge::midPoint() const
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{
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return (to()->pos + from()->pos) * 0.5f;
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}
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float Edge::length() const
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{
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return ::length(to()->pos - from()->pos);
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}
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// Return angle between this edge and the previous one.
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float Edge::angle() const {
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Vector3 p = vertex->pos;
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Vector3 a = prev->vertex->pos;
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Vector3 b = next->vertex->pos;
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Vector3 v0 = a - p;
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Vector3 v1 = b - p;
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return acosf(dot(v0, v1) / (nv::length(v0) * nv::length(v1)));
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}
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bool Edge::isValid() const
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{
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// null face is OK.
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if (next == NULL || prev == NULL || pair == NULL || vertex == NULL) return false;
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if (next->prev != this) return false;
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if (prev->next != this) return false;
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if (pair->pair != this) return false;
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return true;
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}
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/*
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Edge * Edge::nextBoundary() {
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nvDebugCheck(this->m_pair == NULL);
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}
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Edge * Edge::prevBoundary() {
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nvDebugCheck(this->m_pair == NULL);
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}
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*/
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