#ifndef _TRIANGLE_H_
#define _TRIANGLE_H_

#include "gl.h"
#include <vmmlib/vector.hpp>
#include <vmmlib/matrix.hpp>

class Triangle
{
  public:
    Triangle() : c(vmml::vec4f::ONE) {
      v[0] = v[1] = v[2] = vmml::vec3f::ZERO;
    }

    Triangle(const vmml::vec3f &v1, const vmml::vec3f &v2, const vmml::vec3f &v3, const vmml::vec4f &c0) : c(c0)
    {
      v[0] = v1;
      v[1] = v2;
      v[2] = v3;
    }
    
    const vmml::vec3f& getVertex(int i) const {return v[i];}
    const vmml::vec4f& getColor() const {return c;}
    
    vmml::vec3f getNormal() const {
      return v[0].compute_normal(v[1], v[2]);
    }

    void render() const {
      glColor4fv(c.array);
      glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, c.array);
      glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, (c/2).array);
      
      glNormal3fv(getNormal().array);

      for(int i = 0; i < 3; ++i)
      {
        glVertex3fv(v[i].array);
      }
    }
    
    void transform(const vmml::mat4f &m) {
      for(int i = 0; i < 3; ++i)
      {
        v[i] = m*v[i];
      }
    }
    
    vmml::vec3f getCenter() const {
      return (v[0]+v[1]+v[2])/3;
    }

  private:
    vmml::vec3f v[3];
    vmml::vec4f c;
};

#endif /*_TRIANGLE_H_*/