mirror of https://github.com/fltk/fltk
174 lines
4.2 KiB
C++
174 lines
4.2 KiB
C++
//
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// "$Id$"
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//
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// CubeView class implementation for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2010 by Bill Spitzak and others.
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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// USA.
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//
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// Please report all bugs and problems on the following page:
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//
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// http://www.fltk.org/str.php
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//
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#include "CubeView.h"
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#include <math.h>
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#if HAVE_GL
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CubeView::CubeView(int x,int y,int w,int h,const char *l)
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: Fl_Gl_Window(x,y,w,h,l)
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#else
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CubeView::CubeView(int x,int y,int w,int h,const char *l)
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: Fl_Box(x,y,w,h,l)
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#endif /* HAVE_GL */
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{
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vAng = 0.0;
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hAng=0.0;
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size=10.0;
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xshift=0.0;
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yshift=0.0;
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/* The cube definition. These are the vertices of a unit cube
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* centered on the origin.*/
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boxv0[0] = -0.5; boxv0[1] = -0.5; boxv0[2] = -0.5;
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boxv1[0] = 0.5; boxv1[1] = -0.5; boxv1[2] = -0.5;
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boxv2[0] = 0.5; boxv2[1] = 0.5; boxv2[2] = -0.5;
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boxv3[0] = -0.5; boxv3[1] = 0.5; boxv3[2] = -0.5;
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boxv4[0] = -0.5; boxv4[1] = -0.5; boxv4[2] = 0.5;
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boxv5[0] = 0.5; boxv5[1] = -0.5; boxv5[2] = 0.5;
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boxv6[0] = 0.5; boxv6[1] = 0.5; boxv6[2] = 0.5;
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boxv7[0] = -0.5; boxv7[1] = 0.5; boxv7[2] = 0.5;
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#if !HAVE_GL
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label("OpenGL is required for this demo to operate.");
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align(FL_ALIGN_WRAP | FL_ALIGN_INSIDE);
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#endif /* !HAVE_GL */
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}
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#if HAVE_GL
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void CubeView::drawCube() {
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/* Draw a colored cube */
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#define ALPHA 0.5
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glShadeModel(GL_FLAT);
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glBegin(GL_QUADS);
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glColor4f(0.0, 0.0, 1.0, ALPHA);
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glVertex3fv(boxv0);
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glVertex3fv(boxv1);
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glVertex3fv(boxv2);
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glVertex3fv(boxv3);
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glColor4f(1.0, 1.0, 0.0, ALPHA);
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glVertex3fv(boxv0);
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glVertex3fv(boxv4);
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glVertex3fv(boxv5);
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glVertex3fv(boxv1);
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glColor4f(0.0, 1.0, 1.0, ALPHA);
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glVertex3fv(boxv2);
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glVertex3fv(boxv6);
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glVertex3fv(boxv7);
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glVertex3fv(boxv3);
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glColor4f(1.0, 0.0, 0.0, ALPHA);
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glVertex3fv(boxv4);
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glVertex3fv(boxv5);
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glVertex3fv(boxv6);
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glVertex3fv(boxv7);
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glColor4f(1.0, 0.0, 1.0, ALPHA);
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glVertex3fv(boxv0);
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glVertex3fv(boxv3);
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glVertex3fv(boxv7);
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glVertex3fv(boxv4);
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glColor4f(0.0, 1.0, 0.0, ALPHA);
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glVertex3fv(boxv1);
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glVertex3fv(boxv5);
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glVertex3fv(boxv6);
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glVertex3fv(boxv2);
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glEnd();
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glColor3f(1.0, 1.0, 1.0);
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glBegin(GL_LINES);
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glVertex3fv(boxv0);
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glVertex3fv(boxv1);
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glVertex3fv(boxv1);
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glVertex3fv(boxv2);
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glVertex3fv(boxv2);
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glVertex3fv(boxv3);
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glVertex3fv(boxv3);
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glVertex3fv(boxv0);
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glVertex3fv(boxv4);
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glVertex3fv(boxv5);
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glVertex3fv(boxv5);
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glVertex3fv(boxv6);
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glVertex3fv(boxv6);
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glVertex3fv(boxv7);
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glVertex3fv(boxv7);
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glVertex3fv(boxv4);
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glVertex3fv(boxv0);
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glVertex3fv(boxv4);
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glVertex3fv(boxv1);
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glVertex3fv(boxv5);
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glVertex3fv(boxv2);
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glVertex3fv(boxv6);
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glVertex3fv(boxv3);
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glVertex3fv(boxv7);
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glEnd();
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}//drawCube
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void CubeView::draw() {
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if (!valid()) {
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glLoadIdentity();
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glViewport(0,0,w(),h());
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glOrtho(-10,10,-10,10,-20050,10000);
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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}
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glPushMatrix();
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glTranslatef(xshift, yshift, 0);
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glRotatef(hAng,0,1,0); glRotatef(vAng,1,0,0);
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glScalef(float(size),float(size),float(size));
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drawCube();
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glPopMatrix();
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}
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#endif /* HAVE_GL */
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//
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// End of "$Id$".
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//
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