TriangleSet.h

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#ifndef TRIANGLESET_H
#define TRIANGLESET_H

#include "Triangle.h"

#include <vector>
#include <math.h>

#ifndef BUILDING_DOX
struct Triangle;
#endif

class TriangleSet {
public:
    static float distance(Vertex a, Vertex b) {
      const float dx = a.x - b.x;
      const float dy = a.y - b.y;
      const float dz = a.z - b.z;
      
      return sqrtf(dx*dx + dy*dy + dz*dz);
    }

    static Vertex centre(Vertex a, Vertex b) {
      return Vertex(
          (a.x + b.x)/2,
          (a.y + b.y)/2,
          (a.z + b.z)/2); 
    }

    void add(Triangle *triangle);
    
    void add(TriangleSet* tset);

    size_t count();

    Triangle& operator[] (unsigned index);

    template <int QUALITY> static float size (Triangle* triangle);

    static TriangleSet* divide(Triangle *triangle);

  private:
    typedef std::vector<Triangle> TContainer;
    TContainer container_;

};

template <> inline float TriangleSet::size<0> (Triangle *t) {
  Vertex *v = t->vertex;
  float size = 0.0;
  for(int i=0; i<3; i++)
    size+= distance(v[i], v[(i+1)%3]);
  
  return size;
}

template <> inline float TriangleSet::size<1> (Triangle *t) {
  Vertex *v = t->vertex;
  float length[3];
  float sum = 0.0;
  for(int i=0; i<3; i++)
    sum+= length[i]= distance(v[i], v[(i+1)%3]);
  
  float size = (sum/=2);
  for(int i=0; i<3; i++)
    size*= sum-length[i];
  
  return sqrtf(size);
}


#endif // TRIANGLESET_H

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