//// "$Id: CubeView.cxx,v 1.1.1.1 2003/08/07 21:18:42 jasonk Exp $"//// CubeView class implementation for the Fast Light Tool Kit (FLTK).//// Copyright 1998-1999 by Bill Spitzak and others.//// This library is free software; you can redistribute it and/or// modify it under the terms of the GNU Library General Public// License as published by the Free Software Foundation; either// version 2 of the License, or (at your option) any later version.//// This library is distributed in the hope that it will be useful,// but WITHOUT ANY WARRANTY; without even the implied warranty of// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU// Library General Public License for more details.//// You should have received a copy of the GNU Library General Public// License along with this library; if not, write to the Free Software// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307// USA.//// Please report all bugs and problems to "fltk-bugs@easysw.com".//#include "CubeView.h"#include <math.h>#if HAVE_GLCubeView::CubeView(int x,int y,int w,int h,const char *l)            : Fl_Gl_Window(x,y,w,h,l)#elseCubeView::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;        /* 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_GLvoid 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();};//drawCubevoid CubeView::draw() {    if (!valid()) {        glLoadIdentity();        glViewport(0,0,w(),h());        glOrtho(-10,10,-10,10,-20000,10000);        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: CubeView.cxx,v 1.1.1.1 2003/08/07 21:18:42 jasonk Exp $".//