progs/tests/multiwindow.c

   1
   2 /*
   3  * A skeleton/template GLUT program
   4  *
   5  * Written by Brian Paul and in the public domain.
   6  */
   7
   8
   9 /*
  10  * Revision 1.1  2001/08/21 14:25:31  brianp
  11  * simple multi-window GLUT test prog
  12  *
  13  * Revision 1.1.1.1  1999/08/19 00:55:42  jtg
  14  * Imported sources
  15  *
  16  * Revision 1.2  1998/11/07 14:20:14  brianp
  17  * added simple rotation, animation of cube
  18  *
  19  * Revision 1.1  1998/11/07 14:14:37  brianp
  20  * Initial revision
  21  *
  22  */
  23
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <math.h>
  28 #include <GL/glut.h>
  29
  30
  31 static GLint Window[2];
  32
  33 static GLfloat Xrot = 0, Yrot = 0, Zrot = 0;
  34 static GLboolean Anim = GL_TRUE;
  35
  36
  37 static void Idle( void )
  38 {
  39    Xrot += 3.0;
  40    Yrot += 4.0;
  41    Zrot += 2.0;
  42
  43    glutSetWindow(Window[0]);
  44    glutPostRedisplay();
  45    glutSetWindow(Window[1]);
  46    glutPostRedisplay();
  47 }
  48
  49
  50 static void Display0( void )
  51 {
  52    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
  53
  54    glEnable(GL_LIGHTING);
  55    glEnable(GL_LIGHT0);
  56    glEnable(GL_DEPTH_TEST);
  57
  58    glPushMatrix();
  59    glRotatef(Xrot, 1, 0, 0);
  60    glRotatef(Yrot, 0, 1, 0);
  61    glRotatef(Zrot, 0, 0, 1);
  62
  63    glColor3f(0, 1, 0);
  64    glutSolidCube(2.0);
  65
  66    glPopMatrix();
  67
  68    glutSwapBuffers();
  69 }
  70
  71
  72 static void Display1( void )
  73 {
  74    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
  75
  76    glPushMatrix();
  77    glRotatef(Xrot, 1, 0, 0);
  78    glRotatef(Yrot, 0, 1, 0);
  79    glRotatef(Zrot, 0, 0, 1);
  80
  81    glShadeModel(GL_FLAT);
  82
  83    glBegin(GL_TRIANGLE_STRIP);
  84    glColor3f(1, 0, 0);
  85    glVertex2f(-1, -1);
  86    glVertex2f( 1, -1);
  87    glColor3f(1, 0, 0);
  88    glVertex2f( -1, 1);
  89    glColor3f(0, 0, 1);
  90    glVertex2f( 1, 1);
  91    glEnd();
  92
  93    glPopMatrix();
  94
  95    glutSwapBuffers();
  96 }
  97
  98
  99 static void Reshape( int width, int height )
 100 {
 101    glViewport( 0, 0, width, height );
 102    glMatrixMode( GL_PROJECTION );
 103    glLoadIdentity();
 104    glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 );
 105    glMatrixMode( GL_MODELVIEW );
 106    glLoadIdentity();
 107    glTranslatef( 0.0, 0.0, -15.0 );
 108 }
 109
 110
 111 static void Key( unsigned char key, int x, int y )
 112 {
 113    const GLfloat step = 3.0;
 114    (void) x;
 115    (void) y;
 116    switch (key) {
 117       case 'a':
 118          Anim = !Anim;
 119          if (Anim)
 120             glutIdleFunc(Idle);
 121          else
 122             glutIdleFunc(NULL);
 123          break;
 124       case 'z':
 125          Zrot -= step;
 126          break;
 127       case 'Z':
 128          Zrot += step;
 129          break;
 130       case 27:
 131          exit(0);
 132          break;
 133    }
 134    glutPostRedisplay();
 135 }
 136
 137
 138
 139
 140 int main( int argc, char *argv[] )
 141 {
 142    glutInit( &argc, argv );
 143
 144    glutInitWindowPosition( 0, 0 );
 145    glutInitWindowSize( 400, 400 );
 146    glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
 147    Window[0] = glutCreateWindow(argv[0]);
 148    glutReshapeFunc( Reshape );
 149    glutKeyboardFunc( Key );
 150    glutDisplayFunc( Display0 );
 151    glutIdleFunc(Idle);
 152    printf("GL_RENDERER[0] = %s\n", (char *) glGetString(GL_RENDERER));
 153
 154    glutInitWindowPosition( 500, 0 );
 155    glutInitWindowSize( 400, 400 );
 156    glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
 157    Window[1] = glutCreateWindow(argv[0]);
 158    glutReshapeFunc( Reshape );
 159    glutKeyboardFunc( Key );
 160    glutDisplayFunc( Display1 );
 161    glutIdleFunc(Idle);
 162    printf("GL_RENDERER[1] = %s\n", (char *) glGetString(GL_RENDERER));
 163
 164    glutMainLoop();
 165
 166    return 0;
 167 }