--- /dev/null
+/* $Id: multiwindow.c,v 1.1 2001/08/21 14:25:31 brianp Exp $ */
+
+/*
+ * A skeleton/template GLUT program
+ *
+ * Written by Brian Paul and in the public domain.
+ */
+
+
+/*
+ * $Log: multiwindow.c,v $
+ * Revision 1.1 2001/08/21 14:25:31 brianp
+ * simple multi-window GLUT test prog
+ *
+ * Revision 1.1.1.1 1999/08/19 00:55:42 jtg
+ * Imported sources
+ *
+ * Revision 1.2 1998/11/07 14:20:14 brianp
+ * added simple rotation, animation of cube
+ *
+ * Revision 1.1 1998/11/07 14:14:37 brianp
+ * Initial revision
+ *
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/glut.h>
+
+
+static GLint Window[2];
+
+static GLfloat Xrot = 0, Yrot = 0, Zrot = 0;
+static GLboolean Anim = GL_TRUE;
+
+
+static void Idle( void )
+{
+ Xrot += 3.0;
+ Yrot += 4.0;
+ Zrot += 2.0;
+
+ glutSetWindow(Window[0]);
+ glutPostRedisplay();
+ glutSetWindow(Window[1]);
+ glutPostRedisplay();
+}
+
+
+static void Display0( void )
+{
+ glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+ glEnable(GL_LIGHTING);
+ glEnable(GL_LIGHT0);
+ glEnable(GL_DEPTH_TEST);
+
+ glPushMatrix();
+ glRotatef(Xrot, 1, 0, 0);
+ glRotatef(Yrot, 0, 1, 0);
+ glRotatef(Zrot, 0, 0, 1);
+
+ glColor3f(0, 1, 0);
+ glutSolidCube(2.0);
+
+ glPopMatrix();
+
+ glutSwapBuffers();
+}
+
+
+static void Display1( void )
+{
+ glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+ glPushMatrix();
+ glRotatef(Xrot, 1, 0, 0);
+ glRotatef(Yrot, 0, 1, 0);
+ glRotatef(Zrot, 0, 0, 1);
+
+ glShadeModel(GL_FLAT);
+
+ glBegin(GL_TRIANGLE_STRIP);
+ glColor3f(1, 0, 0);
+ glVertex2f(-1, -1);
+ glVertex2f( 1, -1);
+ glColor3f(1, 0, 0);
+ glVertex2f( -1, 1);
+ glColor3f(0, 0, 1);
+ glVertex2f( 1, 1);
+ glEnd();
+
+ glPopMatrix();
+
+ glutSwapBuffers();
+}
+
+
+static void Reshape( int width, int height )
+{
+ glViewport( 0, 0, width, height );
+ glMatrixMode( GL_PROJECTION );
+ glLoadIdentity();
+ glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 );
+ glMatrixMode( GL_MODELVIEW );
+ glLoadIdentity();
+ glTranslatef( 0.0, 0.0, -15.0 );
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+ const GLfloat step = 3.0;
+ (void) x;
+ (void) y;
+ switch (key) {
+ case 'a':
+ Anim = !Anim;
+ if (Anim)
+ glutIdleFunc(Idle);
+ else
+ glutIdleFunc(NULL);
+ break;
+ case 'z':
+ Zrot -= step;
+ break;
+ case 'Z':
+ Zrot += step;
+ break;
+ case 27:
+ exit(0);
+ break;
+ }
+ glutPostRedisplay();
+}
+
+
+
+
+int main( int argc, char *argv[] )
+{
+ glutInit( &argc, argv );
+
+ glutInitWindowPosition( 0, 0 );
+ glutInitWindowSize( 400, 400 );
+ glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
+ Window[0] = glutCreateWindow(argv[0]);
+ glutReshapeFunc( Reshape );
+ glutKeyboardFunc( Key );
+ glutDisplayFunc( Display0 );
+ glutIdleFunc(Idle);
+ printf("GL_RENDERER[0] = %s\n", (char *) glGetString(GL_RENDERER));
+
+ glutInitWindowPosition( 500, 0 );
+ glutInitWindowSize( 400, 400 );
+ glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
+ Window[1] = glutCreateWindow(argv[0]);
+ glutReshapeFunc( Reshape );
+ glutKeyboardFunc( Key );
+ glutDisplayFunc( Display1 );
+ glutIdleFunc(Idle);
+ printf("GL_RENDERER[1] = %s\n", (char *) glGetString(GL_RENDERER));
+
+ glutMainLoop();
+
+ return 0;
+}