1 files changed, 0 insertions, 269 deletions
diff --git a/progs/demos/singlebuffer.c b/progs/demos/singlebuffer.c
deleted file mode 100644
index 9899c245b2a..00000000000
--- a/progs/demos/singlebuffer.c
+++ /dev/null
@@ -1,269 +0,0 @@
-/*
- * Demo of (nearly) flicker-free drawing with a single color buffer.
- *
- * Basically, draw the scene into the Z buffer first, then draw the
- * scene into the color buffer.  Finally, "clear" the background by
- * setting the fragments we didn't hit earlier.
- *
- * This won't work if you need blending.  The technique works best
- * when the scene is relatively simple and can be rendered quickly
- * (i.e. with hardware), and when the objects don't move too much from
- * one frame to the next.
- *
- * Brian Paul
- * 25 August 2005
- *
- * See Mesa license for terms.
- */
-
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <GL/glut.h>
-
-
-#define FLICKER 0
-#define NO_FLICKER 1
-
-static GLint Mode = NO_FLICKER;
-static GLfloat Xrot = 0, Yrot = 0, Zrot = 0;
-static GLboolean Anim = GL_TRUE;
-static GLfloat ClearColor[4] = {0.2, 0.2, 0.9, 0.0};
-static GLfloat NearClip = 5.0, FarClip = 25.0, ViewDist = 7.0;
-static double PrevTime = -1;
-
-struct box {
-   float tx, ty, tz;
-   float rx, ry, rz, ra;
-   float sx, sy, sz;
-   float color[4];
-};
-
-#define NUM_BOXES 25
-
-struct box Boxes[NUM_BOXES];
-
-
-/* Return random float in [0,1] */
-static float
-Random(void)
-{
-   int i = rand();
-   return (float) (i % 1000) / 1000.0;
-}
-
-
-static void
-MakeBoxes(void)
-{
-   int i;
-   for (i = 0; i < NUM_BOXES; i++) {
-      Boxes[i].tx = -1.0 + 2.0 * Random();
-      Boxes[i].ty = -1.0 + 2.0 * Random();
-      Boxes[i].tz = -1.0 + 2.0 * Random();
-      Boxes[i].sx = 0.1 + Random() * 0.4;
-      Boxes[i].sy = 0.1 + Random() * 0.4;
-      Boxes[i].sz = 0.1 + Random() * 0.4;
-      Boxes[i].rx = Random();
-      Boxes[i].ry = Random();
-      Boxes[i].rz = Random();
-      Boxes[i].ra = Random() * 360.0;
-      Boxes[i].color[0] = Random();
-      Boxes[i].color[1] = Random();
-      Boxes[i].color[2] = Random();
-      Boxes[i].color[3] = 1.0;
-   }
-}
-
-
-static void
-DrawBoxes(void)
-{
-   int i;
-   for (i = 0; i < NUM_BOXES; i++) {
-      glPushMatrix();
-      glTranslatef(Boxes[i].tx, Boxes[i].ty, Boxes[i].tz);
-      glRotatef(Boxes[i].ra, Boxes[i].rx, Boxes[i].ry, Boxes[i].rz);
-      glScalef(Boxes[i].sx, Boxes[i].sy, Boxes[i].sz);
-      glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, Boxes[i].color);
-      glutSolidCube(1.0);
-      glPopMatrix();
-   }
-}
-
-
-static void
-Idle(void)
-{
-   double dt, t = glutGet(GLUT_ELAPSED_TIME) * 0.001;
-   if (PrevTime < 0.0)
-      PrevTime = t;
-   dt = t - PrevTime;
-   PrevTime = t;
-   Xrot += 16.0 * dt;
-   Yrot += 12.0 * dt;
-   Zrot += 8.0 * dt;
-   glutPostRedisplay();
-}
-
-
-static void
-Draw(void)
-{
-   if (Mode == FLICKER) {
-      glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-   }
-   else {
-      /* don't clear color buffer */
-      glClear(GL_DEPTH_BUFFER_BIT);
-      /* update Z buffer only */
-      glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
-   }
-
-   glPushMatrix();
-   glRotatef(Xrot, 1, 0, 0);
-   glRotatef(Yrot, 0, 1, 0);
-   glRotatef(Zrot, 0, 0, 1);
-
-   DrawBoxes();
-
-   if (Mode == NO_FLICKER) {
-      /* update color buffer now */
-      glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
-      glDepthFunc(GL_EQUAL);
-      DrawBoxes();
-      glDepthFunc(GL_LESS);
-   }
-
-   glPopMatrix();
-
-   if (Mode == NO_FLICKER) {
-      /* "clear" the untouched pixels now.
-       * Note: if you comment-out this code you'll see something interesting.
-       */
-      GLfloat x = FarClip / NearClip;
-      GLfloat z = -(FarClip - ViewDist - 1.0);
-      glDisable(GL_LIGHTING);
-      glColor4fv(ClearColor);
-      glBegin(GL_POLYGON);
-      glVertex3f(-x, -x, z);
-      glVertex3f( x, -x, z);
-      glVertex3f( x,  x, z);
-      glVertex3f(-x,  x, z);
-      glEnd();
-      glEnable(GL_LIGHTING);
-   }
-
-   /* This is where you'd normally do SwapBuffers */
-   glFinish();
-}
-
-
-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, NearClip, FarClip);
-   glMatrixMode(GL_MODELVIEW);
-   glLoadIdentity();
-   glTranslatef(0.0, 0.0, -ViewDist);
-}
-
-
-static void
-Key(unsigned char key, int x, int y)
-{
-   (void) x;
-   (void) y;
-   switch (key) {
-      case 'a':
-         Anim = !Anim;
-         if (Anim)
-            glutIdleFunc(Idle);
-         else
-            glutIdleFunc(NULL);
-         PrevTime = -1;
-         break;
-      case 'm':
-         Mode = !Mode;
-         break;
-      case 'b':
-         MakeBoxes();
-         break;
-      case 27:
-         exit(0);
-         break;
-   }
-   glutPostRedisplay();
-}
-
-
-static void
-SpecialKey(int key, int x, int y)
-{
-   const GLfloat step = 3.0;
-   (void) x;
-   (void) y;
-   switch (key) {
-      case GLUT_KEY_UP:
-         Xrot -= step;
-         break;
-      case GLUT_KEY_DOWN:
-         Xrot += step;
-         break;
-      case GLUT_KEY_LEFT:
-         Yrot -= step;
-         break;
-      case GLUT_KEY_RIGHT:
-         Yrot += step;
-         break;
-   }
-   glutPostRedisplay();
-}
-
-
-static void
-Init(void)
-{
-   glClearColor(ClearColor[0], ClearColor[1], ClearColor[2], ClearColor[3]);
-   glEnable(GL_DEPTH_TEST);
-   glEnable(GL_LIGHTING);
-   glEnable(GL_LIGHT0);
-   glEnable(GL_CULL_FACE);
-   glEnable(GL_NORMALIZE);
-   MakeBoxes();
-}
-
-
-static void
-Usage(void)
-{
-   printf("Keys:\n");
-   printf("  m       - toggle drawing mode (flicker vs. no flicker)\n");
-   printf("  a       - toggle animation\n");
-   printf("  b       - generate new boxes\n");
-   printf("  ARROWS  - rotate scene\n");
-   printf("  ESC     - exit\n");
-}
-
-
-int
-main(int argc, char *argv[])
-{
-   glutInit(&argc, argv);
-   glutInitWindowSize(800, 800);
-   glutInitDisplayMode(GLUT_RGB | GLUT_SINGLE | GLUT_DEPTH);
-   glutCreateWindow(argv[0]);
-   glutReshapeFunc(Reshape);
-   glutKeyboardFunc(Key);
-   glutSpecialFunc(SpecialKey);
-   glutDisplayFunc(Draw);
-   if (Anim)
-      glutIdleFunc(Idle);
-   Init();
-   Usage();
-   glutMainLoop();
-   return 0;
-}