SimpleArrow.cpp

#include "SimpleArrow.h"

SimpleArrow::SimpleArrow (double s)
{
        size = s;
}

SimpleArrow::~SimpleArrow ()
{
        // nothing to do
}

void SimpleArrow::Draw ()
{
        glBegin (GL_TRIANGLES);

                glColor4fv (color);

                glNormal3f (1.0f, 0.0f, 0.0f);
                glVertex3f (0.0f, 0.0f, 0.0f);
                glNormal3f (-0.707f, -0.707f, 0.0f);
                glVertex3f (-size, -size/2, 0.0f);
                glNormal3f (-0.707f, 0.707f, 0.0f);
                glVertex3f (-size, size/2, 0.0f);

                glColor4f (1.0f, 0.0f, 0.0f, 1.0f);

                glNormal3f (1.0f, 0.0f, 0.0f);
                glVertex3f (0.0f, 0.0f, 0.0f);
                glNormal3f (-0.707f, 0.0f, -0.707f);
                glVertex3f (-size, 0, -size/2);
                glNormal3f (-0.707f, 0.0f, 0.707f);
                glVertex3f (-size, 0, size/2);

                glColor4fv (color);

                glNormal3f (1.0f, 0.0f, 0.0f);
                glVertex3f (0.0f, 0.0f, 0.0f);
                glNormal3f (-0.707f, -0.707f, 0.0f);
                glVertex3f (-size, -size/2, -size/2);
                glNormal3f (-0.707f, 0.707f, 0.0f);
                glVertex3f (-size, size/2, size/2);

                glNormal3f (1.0f, 0.0f, 0.0f);
                glVertex3f (0.0f, 0.0f, 0.0f);
                glNormal3f (-0.707f, -0.707, 0.0f);
                glVertex3f (-size, -size/2, size/2);
                glNormal3f (-0.707f, 0.707, 0.0f);
                glVertex3f (-size, size/2, -size/2);
                
        glEnd ();
}

double SimpleArrow::GetBoundingRadius ()
{
        return size * 1.415;
}

BoundingBox SimpleArrow::GetBoundingBox ()
{
        BoundingBox result;

        result.xmin = -size;
        result.xmax = 0;
        result.ymin = -size / 2;
        result.ymax = size / 2;
        result.zmin = -size / 2;
        result.zmax = size / 2;

        return result;
}

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