1
2/* Copyright (c) Mark J. Kilgard, 1994. */
3
4/*
5 * (c) Copyright 1993, Silicon Graphics, Inc.
6 * ALL RIGHTS RESERVED
7 * Permission to use, copy, modify, and distribute this software for
8 * any purpose and without fee is hereby granted, provided that the above
9 * copyright notice appear in all copies and that both the copyright notice
10 * and this permission notice appear in supporting documentation, and that
11 * the name of Silicon Graphics, Inc. not be used in advertising
12 * or publicity pertaining to distribution of the software without specific,
13 * written prior permission.
14 *
15 * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
16 * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
17 * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
18 * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
19 * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
20 * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
21 * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
22 * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
23 * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
24 * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
25 * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
26 * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
27 *
28 * US Government Users Restricted Rights
29 * Use, duplication, or disclosure by the Government is subject to
30 * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
31 * (c)(1)(ii) of the Rights in Technical Data and Computer Software
32 * clause at DFARS 252.227-7013 and/or in similar or successor
33 * clauses in the FAR or the DOD or NASA FAR Supplement.
34 * Unpublished-- rights reserved under the copyright laws of the
35 * United States.  Contractor/manufacturer is Silicon Graphics,
36 * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
37 *
38 * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
39 */
40/*  accanti.c
41 */
42#include <stdlib.h>
43#include "glut_wrap.h"
44#include "jitter.h"
45
46/*  Initialize lighting and other values.
47 */
48static void myinit(void)
49{
50    GLfloat mat_ambient[] = { 1.0, 1.0, 1.0, 1.0 };
51    GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
52    GLfloat light_position[] = { 0.0, 0.0, 10.0, 1.0 };
53    GLfloat lm_ambient[] = { 0.2, 0.2, 0.2, 1.0 };
54
55    glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient);
56    glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
57    glMaterialf(GL_FRONT, GL_SHININESS, 50.0);
58    glLightfv(GL_LIGHT0, GL_POSITION, light_position);
59    glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lm_ambient);
60
61    glEnable(GL_LIGHTING);
62    glEnable(GL_LIGHT0);
63    glDepthFunc(GL_LESS);
64    glEnable(GL_DEPTH_TEST);
65    glShadeModel (GL_FLAT);
66
67    glClearColor(0.0, 0.0, 0.0, 0.0);
68    glClearAccum(0.0, 0.0, 0.0, 0.0);
69}
70
71static void displayObjects(void)
72{
73    GLfloat torus_diffuse[] = { 0.7, 0.7, 0.0, 1.0 };
74    GLfloat cube_diffuse[] = { 0.0, 0.7, 0.7, 1.0 };
75    GLfloat sphere_diffuse[] = { 0.7, 0.0, 0.7, 1.0 };
76    GLfloat octa_diffuse[] = { 0.7, 0.4, 0.4, 1.0 };
77
78    glPushMatrix ();
79    glRotatef (30.0, 1.0, 0.0, 0.0);
80
81    glPushMatrix ();
82    glTranslatef (-0.80, 0.35, 0.0);
83    glRotatef (100.0, 1.0, 0.0, 0.0);
84    glMaterialfv(GL_FRONT, GL_DIFFUSE, torus_diffuse);
85    glutSolidTorus (0.275, 0.85, 16, 16);
86    glPopMatrix ();
87
88    glPushMatrix ();
89    glTranslatef (-0.75, -0.50, 0.0);
90    glRotatef (45.0, 0.0, 0.0, 1.0);
91    glRotatef (45.0, 1.0, 0.0, 0.0);
92    glMaterialfv(GL_FRONT, GL_DIFFUSE, cube_diffuse);
93    glutSolidCube (1.5);
94    glPopMatrix ();
95
96    glPushMatrix ();
97    glTranslatef (0.75, 0.60, 0.0);
98    glRotatef (30.0, 1.0, 0.0, 0.0);
99    glMaterialfv(GL_FRONT, GL_DIFFUSE, sphere_diffuse);
100    glutSolidSphere (1.0, 16, 16);
101    glPopMatrix ();
102
103    glPushMatrix ();
104    glTranslatef (0.70, -0.90, 0.25);
105    glMaterialfv(GL_FRONT, GL_DIFFUSE, octa_diffuse);
106    glutSolidOctahedron ();
107    glPopMatrix ();
108
109    glPopMatrix ();
110}
111
112#define ACSIZE	8
113
114static void display(void)
115{
116    GLint viewport[4];
117    int jitter;
118
119    glGetIntegerv (GL_VIEWPORT, viewport);
120
121    glClear(GL_ACCUM_BUFFER_BIT);
122    for (jitter = 0; jitter < ACSIZE; jitter++) {
123	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
124	glPushMatrix ();
125/*	Note that 4.5 is the distance in world space between
126 *	left and right and bottom and top.
127 *	This formula converts fractional pixel movement to
128 *	world coordinates.
129 */
130	glTranslatef (j8[jitter].x*4.5/viewport[2],
131	    j8[jitter].y*4.5/viewport[3], 0.0);
132	displayObjects ();
133	glPopMatrix ();
134	glAccum(GL_ACCUM, 1.0/ACSIZE);
135    }
136    glAccum (GL_RETURN, 1.0);
137    glFlush();
138}
139
140static void myReshape(int w, int h)
141{
142    glViewport(0, 0, w, h);
143    glMatrixMode(GL_PROJECTION);
144    glLoadIdentity();
145    if (w <= h)
146	glOrtho (-2.25, 2.25, -2.25*h/w, 2.25*h/w, -10.0, 10.0);
147    else
148	glOrtho (-2.25*w/h, 2.25*w/h, -2.25, 2.25, -10.0, 10.0);
149    glMatrixMode(GL_MODELVIEW);
150}
151
152static void
153key(unsigned char k, int x, int y)
154{
155  switch (k) {
156  case 27:  /* Escape */
157    exit(0);
158    break;
159  default:
160    return;
161  }
162  glutPostRedisplay();
163}
164
165/*  Main Loop
166 *  Open window with initial window size, title bar,
167 *  RGBA display mode, and handle input events.
168 */
169int main(int argc, char** argv)
170{
171    glutInit(&argc, argv);
172    glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB
173			| GLUT_ACCUM | GLUT_DEPTH);
174    glutInitWindowSize (250, 250);
175    glutCreateWindow (argv[0]);
176    myinit();
177    glutReshapeFunc (myReshape);
178    glutDisplayFunc(display);
179    glutKeyboardFunc(key);
180    glutMainLoop();
181    return 0;             /* ANSI C requires main to return int. */
182}
183