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//
// "$Id$"
//
// CubeView class implementation for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2010 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// http://www.fltk.org/COPYING.php
//
// Please report all bugs and problems on the following page:
//
// http://www.fltk.org/str.php
//
#include "CubeView.h"
#include <math.h>
#if HAVE_GL
CubeView::CubeView(int x,int y,int w,int h,const char *l)
: Fl_Gl_Window(x,y,w,h,l)
#else
CubeView::CubeView(int x,int y,int w,int h,const char *l)
: Fl_Box(x,y,w,h,l)
#endif /* HAVE_GL */
{
vAng = 0.0;
hAng=0.0;
size=10.0;
xshift=0.0;
yshift=0.0;
/* The cube definition. These are the vertices of a unit cube
* centered on the origin.*/
boxv0[0] = -0.5; boxv0[1] = -0.5; boxv0[2] = -0.5;
boxv1[0] = 0.5; boxv1[1] = -0.5; boxv1[2] = -0.5;
boxv2[0] = 0.5; boxv2[1] = 0.5; boxv2[2] = -0.5;
boxv3[0] = -0.5; boxv3[1] = 0.5; boxv3[2] = -0.5;
boxv4[0] = -0.5; boxv4[1] = -0.5; boxv4[2] = 0.5;
boxv5[0] = 0.5; boxv5[1] = -0.5; boxv5[2] = 0.5;
boxv6[0] = 0.5; boxv6[1] = 0.5; boxv6[2] = 0.5;
boxv7[0] = -0.5; boxv7[1] = 0.5; boxv7[2] = 0.5;
#if !HAVE_GL
label("OpenGL is required for this demo to operate.");
align(FL_ALIGN_WRAP | FL_ALIGN_INSIDE);
#endif /* !HAVE_GL */
}
#if HAVE_GL
void CubeView::drawCube() {
/* Draw a colored cube */
#define ALPHA 0.5
glShadeModel(GL_FLAT);
glBegin(GL_QUADS);
glColor4f(0.0, 0.0, 1.0, ALPHA);
glVertex3fv(boxv0);
glVertex3fv(boxv1);
glVertex3fv(boxv2);
glVertex3fv(boxv3);
glColor4f(1.0, 1.0, 0.0, ALPHA);
glVertex3fv(boxv0);
glVertex3fv(boxv4);
glVertex3fv(boxv5);
glVertex3fv(boxv1);
glColor4f(0.0, 1.0, 1.0, ALPHA);
glVertex3fv(boxv2);
glVertex3fv(boxv6);
glVertex3fv(boxv7);
glVertex3fv(boxv3);
glColor4f(1.0, 0.0, 0.0, ALPHA);
glVertex3fv(boxv4);
glVertex3fv(boxv5);
glVertex3fv(boxv6);
glVertex3fv(boxv7);
glColor4f(1.0, 0.0, 1.0, ALPHA);
glVertex3fv(boxv0);
glVertex3fv(boxv3);
glVertex3fv(boxv7);
glVertex3fv(boxv4);
glColor4f(0.0, 1.0, 0.0, ALPHA);
glVertex3fv(boxv1);
glVertex3fv(boxv5);
glVertex3fv(boxv6);
glVertex3fv(boxv2);
glEnd();
glColor3f(1.0, 1.0, 1.0);
glBegin(GL_LINES);
glVertex3fv(boxv0);
glVertex3fv(boxv1);
glVertex3fv(boxv1);
glVertex3fv(boxv2);
glVertex3fv(boxv2);
glVertex3fv(boxv3);
glVertex3fv(boxv3);
glVertex3fv(boxv0);
glVertex3fv(boxv4);
glVertex3fv(boxv5);
glVertex3fv(boxv5);
glVertex3fv(boxv6);
glVertex3fv(boxv6);
glVertex3fv(boxv7);
glVertex3fv(boxv7);
glVertex3fv(boxv4);
glVertex3fv(boxv0);
glVertex3fv(boxv4);
glVertex3fv(boxv1);
glVertex3fv(boxv5);
glVertex3fv(boxv2);
glVertex3fv(boxv6);
glVertex3fv(boxv3);
glVertex3fv(boxv7);
glEnd();
}//drawCube
void CubeView::draw() {
if (!valid()) {
glLoadIdentity();
glViewport(0,0,w(),h());
glOrtho(-10,10,-10,10,-20050,10000);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glTranslatef(xshift, yshift, 0);
glRotatef(hAng,0,1,0); glRotatef(vAng,1,0,0);
glScalef(float(size),float(size),float(size));
drawCube();
glPopMatrix();
}
#endif /* HAVE_GL */
//
// End of "$Id$".
//
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