ccolin/mod_geo-tp
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beginning to believe

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This commit is contained in:
papush!
2021-10-22 14:28:54 +02:00
parent a965e6a58e
commit d76d891fca
120 changed files with 193475 additions and 23546 deletions
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34
src/util.h
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@ -1,6 +1,11 @@
#ifndef UTIL_H
#define UTIL_H
#include "my_mesh.h"
#include <QVector3D>
#include <QtMath>
template <typename Mesh>
class HalfedgeLoopRange {
@ -36,4 +41,33 @@ class ConstHalfedgeLoopRange {
};
QDebug operator<<(QDebug dbg, const Point &p);
/* Returns the angle between the vector from p2 to p1 and the vector
* from p2 to p3. */
template <typename Point>
qreal angle_between(Point p1,
Point p2,
Point p3) {
Point vec_a = p1 - p2;
Point vec_b = p3 - p2;
QVector3D a(vec_a[0], vec_a[1], vec_a[2]);
QVector3D b(vec_b[0], vec_b[1], vec_b[2]);
return qAcos(QVector3D::dotProduct(a.normalized(), b.normalized()));
}
template <typename Point>
qreal triangle_area(Point p1,
Point p2,
Point p3) {
Point vec_a = p1 - p2;
Point vec_b = p3 - p2;
QVector3D a(vec_a[0], vec_a[1], vec_a[2]);
QVector3D b(vec_b[0], vec_b[1], vec_b[2]);
return QVector3D::crossProduct(a, b).length() / 2.;
}
#endif