D:/VC++/Info. Vis/infovis/infovis/Triangle.h

#ifndef TRIANGLE_H
#define TRIANGLE_H
#include <math.h>
#include "Vertex.h"
#include "geoshape.h"

class Triangle : public GeoShape
{
public:

        Triangle( float x, float y, float radius ): GeoShape( GeoShape::TRIANGLE,x,y,radius ) // Radius is the distance from the center to one of the vertex
        {    
                mVertices[0] = Vertex(x, radius+y);   // Upper vertex
                mVertices[1] = Vertex(x+radius*sqrt(3.0)/2, y-radius/2); // Lower right
                mVertices[2] = Vertex(x-radius*sqrt(3.0)/2, y-radius/2); // Lower left

                GeoShape::mVertices = mVertices;
                GeoShape::mNumVertices = 3;
        }

        Triangle(Vertex v1, Vertex v2, Vertex v3) 
        {
            mVertices[0] = v1;
                mVertices[1] = v2;
                mVertices[2] = v3;
        }

        ~Triangle( void ) {}

    Vertex mVertices[3];
};

#endif