Initial revision

progs/demos/glutfx.c

@@ -0,0 +1,207 @@
+/* $Id: glutfx.c,v 1.1 1999/08/19 00:55:40 jtg Exp $ */
+
+/*
+ * Example of how one might use GLUT with the 3Dfx driver in full-screen mode.
+ * Note: this only works with X since we're using Mesa's GLX "hack" for
+ * using Glide.
+ *
+ * Goals:
+ *   easy setup and input event handling with GLUT
+ *   use 3Dfx hardware
+ *   automatically set MESA environment variables
+ *   don't lose mouse input focus
+ *
+ * Brian Paul   This file is in the public domain.
+ */
+
+/*
+ * $Log: glutfx.c,v $
+ * Revision 1.1  1999/08/19 00:55:40  jtg
+ * Initial revision
+ *
+ * Revision 3.2  1999/03/28 18:18:33  brianp
+ * minor clean-up
+ *
+ * Revision 3.1  1998/06/29 02:37:30  brianp
+ * minor changes for Windows (Ted Jump)
+ *
+ * Revision 3.0  1998/02/14 18:42:29  brianp
+ * initial rev
+ *
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/glut.h>
+
+
+#define WIDTH 640
+#define HEIGHT 480
+
+
+static int Window = 0;
+static int ScreenWidth, ScreenHeight;
+static GLuint Torus = 0;
+static GLfloat Xrot = 0.0, Yrot = 0.0;
+
+
+
+static void Display( void )
+{
+   static GLfloat blue[4] = {0.2, 0.2, 1.0, 1.0};
+   static GLfloat red[4] = {1.0, 0.2, 0.2, 1.0};
+   static GLfloat green[4] = {0.2, 1.0, 0.2, 1.0};
+
+   glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+   glPushMatrix();
+   glRotatef(Xrot, 1, 0, 0);
+   glRotatef(Yrot, 0, 1, 0);
+
+   glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, blue);
+   glCallList(Torus);
+
+   glRotatef(90.0, 1, 0, 0);
+   glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, red);
+   glCallList(Torus);
+
+   glRotatef(90.0, 0, 1, 0);
+   glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, green);
+   glCallList(Torus);
+
+   glPopMatrix();
+
+   glutSwapBuffers();
+}
+
+
+static void Reshape( int width, int height )
+{
+   float ratio = (float) width / (float) height;
+
+   ScreenWidth = width;
+   ScreenHeight = height;
+
+   /*
+    * The 3Dfx driver is limited to 640 x 480 but the X window may be larger.
+    * Enforce that here.
+    */
+   if (width > WIDTH)
+      width = WIDTH;
+   if (height > HEIGHT)
+      height = HEIGHT;
+
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glFrustum( -ratio, ratio, -1.0, 1.0, 5.0, 30.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -20.0 );
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 27:
+         glutDestroyWindow(Window);
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void SpecialKey( int key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case GLUT_KEY_UP:
+         break;
+      case GLUT_KEY_DOWN:
+         break;
+      case GLUT_KEY_LEFT:
+         break;
+      case GLUT_KEY_RIGHT:
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void MouseMove( int x, int y )
+{
+   Xrot = y - ScreenWidth / 2;
+   Yrot = x - ScreenHeight / 2;
+   glutPostRedisplay();
+}
+
+
+static void Init( void )
+{
+   Torus = glGenLists(1);
+   glNewList(Torus, GL_COMPILE);
+   glutSolidTorus(0.5, 2.0, 10, 20);
+   glEndList();
+
+   glEnable(GL_LIGHTING);
+   glEnable(GL_LIGHT0);
+
+   glEnable(GL_DEPTH_TEST);
+   glEnable(GL_CULL_FACE);
+}
+
+
+int main( int argc, char *argv[] )
+{
+#ifndef _WIN32
+   printf("NOTE: if you've got 3Dfx VooDoo hardware you must run this");
+   printf(" program as root.\n\n");
+   printf("Move the mouse.  Press ESC to exit.\n\n");
+   sleep(2);
+#endif
+
+   /* Tell Mesa GLX to use 3Dfx driver in fullscreen mode. */
+   putenv("MESA_GLX_FX=fullscreen");
+
+   /* Disable 3Dfx Glide splash screen */
+   putenv("FX_GLIDE_NO_SPLASH=");
+
+   /* Give an initial size and position so user doesn't have to place window */
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(WIDTH, HEIGHT);
+   glutInit( &argc, argv );
+
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
+
+   Window = glutCreateWindow(argv[0]);
+   if (!Window) {
+      printf("Error, couldn't open window\n");
+      exit(1);
+   }
+
+   /*
+    * Want the X window to fill the screen so that we don't have to
+    * worry about losing the mouse input focus.
+    * Note that we won't actually see the X window since we never draw
+    * to it, hence, the original X screen's contents aren't disturbed.
+    */
+   glutFullScreen();
+
+   Init();
+
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutSpecialFunc( SpecialKey );
+   glutDisplayFunc( Display );
+   glutPassiveMotionFunc( MouseMove );
+
+   glutMainLoop();
+   return 0;
+}