import org.lwjgl.opengl.GL11;

public class Legs
{
	Vector3D pos;
	Vector3D dir;
		
	
	Legs(Vector3D pos_)
	{
		pos=new Vector3D();
			pos.setXYZ(pos_);
		dir=new Vector3D();		
	}
	
	void initialize()
	{
		pos=new Vector3D();
		dir=new Vector3D();
	}
	
	void setpos(Vector3D pos_)
	{ pos.setXYZ(pos_);}
	
	void setdir(Vector3D front, Vector3D rear)
	{
		crossProduct(front, rear, dir);
		dir.normalize();
		//Now shrink the vector;
		dir.mult(.3f);
	}
	
	void render()
	{
		Vector3D L, R;
			L=new Vector3D(); R=new Vector3D();
		
		L.setXYZ(pos);
		L.sub(dir);
		R.setXYZ(pos);
		R.add(dir);
		
		GL11.glColor3f(.5f, .5f, .5f);
        GL11.glLineWidth(1);
        GL11.glBegin(GL11.GL_LINE_STRIP); 
	    	GL11.glVertex3f(L.x(), L.y(), L.z());
	    	GL11.glVertex3f( R.x(), R.y(), R.z());
    	GL11.glEnd(); 		
	}
	
	void crossProduct(Vector3D a, Vector3D b, Vector3D target)
    {
        target.setXYZ(a.y()*b.z() - a.z()*b.y(),  a.z()*b.x() - a.x()*b.z(),  a.x()*b.y() - a.y()*b.x());
    }
	
	
}//END Legs