/
trimeshutil.h
executable file
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/
trimeshutil.h
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#ifndef TRIMESHUTIL_H
#define TRIMESHUTIL_H
#include "TriMesh.h"
#include "array.h"
#include "octree.h"
#include "tribox.h"
#include "boxbox.h"
template <class T>
static inline
T FindFaceAreas(TriMesh *m, Array<T> &faceareas)
{
m->need_faces();
m->need_normals();
int nf = m->faces.size();
faceareas.resize(nf);
T s = 0;
for (int i = 0; i < nf; i++) {
const TriMesh::Face &f = m->faces[i];
vec v0 = m->vertices[f[0]];
vec v1 = m->vertices[f[1]];
vec v2 = m->vertices[f[2]];
vec facenormal = (v1-v0) CROSS (v2-v0);
s += (faceareas[i] = 0.5f * len(facenormal));
}
return s;
}
static inline
void Normalize(TriMesh *m)
{
vec c(0, 0, 0);
int nv = m->vertices.size();
for (int i = 0; i < nv; i++)
c += m->vertices[i];
c /= nv;
float s = 0;
for (int i = 0; i < nv; i++) {
m->vertices[i] -= c;
s += len2(m->vertices[i]);
}
s /= nv;
for (int i = 0; i < nv; i++)
m->vertices[i] /= s;
}
#endif