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-rw-r--r--progs/demos/spriteblast.c555
1 files changed, 0 insertions, 555 deletions
diff --git a/progs/demos/spriteblast.c b/progs/demos/spriteblast.c
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index 36e226e1d0..0000000000
--- a/progs/demos/spriteblast.c
+++ /dev/null
@@ -1,555 +0,0 @@
-
-/* Copyright (c) Mark J. Kilgard, 1997. */
-
-/* This program is freely distributable without licensing fees
- and is provided without guarantee or warrantee expressed or
- implied. This program is -not- in the public domain. */
-
-/* This example demonstrates how to render particle effects
- with OpenGL. A cloud of pinkish/orange particles explodes with the
- particles bouncing off the ground. When the EXT_point_parameters
- is present , the particle size is attenuated based on eye distance. */
-
-
-/* Modified by Brian Paul to test GL_ARB_point_sprite */
-
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <math.h> /* for cos(), sin(), and sqrt() */
-#ifdef _WIN32
-#include <windows.h>
-#endif
-#include <GL/glew.h>
-#include <GL/glut.h>
-
-/* Some <math.h> files do not define M_PI... */
-#ifndef M_PI
-#define M_PI 3.14159265
-#endif
-
-#if 0 /* For debugging. */
-#undef GL_EXT_point_parameters
-#endif
-
-static GLfloat angle = -150; /* in degrees */
-static int spin = 0;
-static int moving, begin;
-static float theTime;
-static int repeat = 1;
-static int blend = 1;
-int useMipmaps = 1;
-int linearFiltering = 1;
-
-static GLfloat constant[3] = { .2, 0.0, 0.0 };
-static GLfloat linear[3] = { .0, .1, 0.0 };
-static GLfloat theQuad[3] = { .005, 0.1, 1/600.0 };
-
-#define MAX_POINTS 2000
-
-static int numPoints = 200;
-
-static GLfloat pointList[MAX_POINTS][3];
-static GLfloat pointTime[MAX_POINTS];
-static GLfloat pointVelocity[MAX_POINTS][2];
-static GLfloat pointDirection[MAX_POINTS][2];
-static int colorList[MAX_POINTS];
-static int animate = 1, motion = 0, org = 0, sprite = 1, smooth = 1;
-
-static GLfloat colorSet[][4] = {
- /* Shades of red. */
- { 0.7, 0.2, 0.4, 0.5 },
- { 0.8, 0.0, 0.7, 0.5 },
- { 1.0, 0.0, 0.0, 0.5 },
- { 0.9, 0.3, 0.6, 0.5 },
- { 1.0, 0.4, 0.0, 0.5 },
- { 1.0, 0.0, 0.5, 0.5 },
-};
-
-#define NUM_COLORS (sizeof(colorSet)/sizeof(colorSet[0]))
-
-#define DEAD (NUM_COLORS+1)
-
-
-/* GL */
-static GLint spritePattern[16][16] = {
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
- { 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0 },
- { 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0 },
- { 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0 },
- { 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0 },
- { 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0 },
- { 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 0 },
- { 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 0 },
- { 0, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0 },
- { 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 0 },
- { 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0 },
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
-};
-
-
-
-
-#if 0 /* drand48 might be better on Unix machines */
-#define RANDOM_RANGE(lo, hi) ((lo) + (hi - lo) * drand48())
-#else
-static float float_rand(void) { return rand() / (float) RAND_MAX; }
-#define RANDOM_RANGE(lo, hi) ((lo) + (hi - lo) * float_rand())
-#endif
-
-#define MEAN_VELOCITY 3.0
-#define GRAVITY 2.0
-
-/* Modeling units of ground extent in each X and Z direction. */
-#define EDGE 12
-
-static void
-makePointList(void)
-{
- float angle, velocity, direction;
- int i;
-
- motion = 1;
- for (i=0; i<numPoints; i++) {
- pointList[i][0] = 0.0;
- pointList[i][1] = 0.0;
- pointList[i][2] = 0.0;
- pointTime[i] = 0.0;
- angle = (RANDOM_RANGE(60.0, 70.0)) * M_PI/180.0;
- direction = RANDOM_RANGE(0.0, 360.0) * M_PI/180.0;
- pointDirection[i][0] = cos(direction);
- pointDirection[i][1] = sin(direction);
- velocity = MEAN_VELOCITY + RANDOM_RANGE(-0.8, 1.0);
- pointVelocity[i][0] = velocity * cos(angle);
- pointVelocity[i][1] = velocity * sin(angle);
- colorList[i] = rand() % NUM_COLORS;
- }
- theTime = 0.0;
-}
-
-static void
-updatePointList(void)
-{
- float distance;
- int i;
-
- static double t0 = -1.;
- double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
- if (t0 < 0.0)
- t0 = t;
- dt = t - t0;
- t0 = t;
-
- motion = 0;
- for (i=0; i<numPoints; i++) {
- distance = pointVelocity[i][0] * theTime;
-
- /* X and Z */
- pointList[i][0] = pointDirection[i][0] * distance;
- pointList[i][2] = pointDirection[i][1] * distance;
-
- /* Z */
- pointList[i][1] =
- (pointVelocity[i][1] - 0.5 * GRAVITY * pointTime[i])*pointTime[i];
-
- /* If we hit the ground, bounce the point upward again. */
- if (pointList[i][1] <= 0.0) {
- if (distance > EDGE) {
- /* Particle has hit ground past the distance duration of
- the particles. Mark particle as dead. */
- colorList[i] = NUM_COLORS; /* Not moving. */
- continue;
- }
-
- pointVelocity[i][1] *= 0.8; /* 80% of previous up velocity. */
- pointTime[i] = 0.0; /* Reset the particles sense of up time. */
- }
- motion = 1;
- pointTime[i] += dt;
- }
- theTime += dt;
- if (!motion && !spin) {
- if (repeat) {
- makePointList();
- } else {
- glutIdleFunc(NULL);
- }
- }
-}
-
-static void
-idle(void)
-{
- updatePointList();
- if (spin) {
- angle += 0.3;
- }
- glutPostRedisplay();
-}
-
-static void
-visible(int vis)
-{
- if (vis == GLUT_VISIBLE) {
- if (animate && (motion || spin)) {
- glutIdleFunc(idle);
- }
- } else {
- glutIdleFunc(NULL);
- }
-}
-
-static void
-redraw(void)
-{
- int i;
-
- glDepthMask(GL_TRUE);
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- glPushMatrix();
- glRotatef(15.0, 1.0, 0.0, 0.0);
- glRotatef(angle, 0.0, 1.0, 0.0);
-
-
- /* Draw the floor. */
-/* glEnable(GL_TEXTURE_2D);*/
- glColor3f(0.1, 0.5, 1.0);
- glBegin(GL_QUADS);
- glTexCoord2f(0.0, 0.0);
- glVertex3f(-EDGE, -0.05, -EDGE);
- glTexCoord2f(20.0, 0.0);
- glVertex3f(EDGE, -0.05, -EDGE);
- glTexCoord2f(20.0, 20.0);
- glVertex3f(EDGE, -0.05, EDGE);
- glTexCoord2f(0.0, 20.0);
- glVertex3f(-EDGE, -0.05, EDGE);
- glEnd();
-
- /* Allow particles to blend with each other. */
- glDepthMask(GL_FALSE);
-
- if (blend)
- glEnable(GL_BLEND);
-
- if (sprite) {
- glEnable(GL_TEXTURE_2D);
-#ifdef GL_ARB_point_sprite
- glEnable(GL_POINT_SPRITE_ARB);
-#endif
- }
-
- glColor3f(1,1,1);
- glBegin(GL_POINTS);
- for (i=0; i<numPoints; i++) {
- /* Draw alive particles. */
- if (colorList[i] != DEAD) {
- if (!sprite) glColor4fv(colorSet[colorList[i]]);
- glVertex3fv(pointList[i]);
- }
- }
- glEnd();
-
- glDisable(GL_TEXTURE_2D);
-#ifdef GL_ARB_point_sprite
- glDisable(GL_POINT_SPRITE_ARB);
-#endif
- glDisable(GL_BLEND);
-
- glPopMatrix();
-
- glutSwapBuffers();
-}
-
-/* ARGSUSED2 */
-static void
-mouse(int button, int state, int x, int y)
-{
- /* Scene can be spun around Y axis using left
- mouse button movement. */
- if (button == GLUT_LEFT_BUTTON && state == GLUT_DOWN) {
- moving = 1;
- begin = x;
- }
- if (button == GLUT_LEFT_BUTTON && state == GLUT_UP) {
- moving = 0;
- }
-}
-
-/* ARGSUSED1 */
-static void
-mouseMotion(int x, int y)
-{
- if (moving) {
- angle = angle + (x - begin);
- begin = x;
- glutPostRedisplay();
- }
-}
-
-static void
-menu(int option)
-{
- switch (option) {
- case 0:
- makePointList();
- break;
-#ifdef GL_ARB_point_parameters
- case 1:
- glPointParameterfvARB(GL_POINT_DISTANCE_ATTENUATION_ARB, constant);
- break;
- case 2:
- glPointParameterfvARB(GL_POINT_DISTANCE_ATTENUATION_ARB, linear);
- break;
- case 3:
- glPointParameterfvARB(GL_POINT_DISTANCE_ATTENUATION_ARB, theQuad);
- break;
-#endif
- case 4:
- blend = 1;
- break;
- case 5:
- blend = 0;
- break;
-#ifdef GL_ARB_point_parameters
- case 6:
- glPointParameterfARB(GL_POINT_FADE_THRESHOLD_SIZE_ARB, 1.0);
- break;
- case 7:
- glPointParameterfARB(GL_POINT_FADE_THRESHOLD_SIZE_ARB, 10.0);
- break;
-#endif
- case 8:
- glEnable(GL_POINT_SMOOTH);
- smooth = 1;
- break;
- case 9:
- glDisable(GL_POINT_SMOOTH);
- smooth = 0;
- break;
- case 10:
- glPointSize(16.0);
- break;
- case 11:
- glPointSize(32.0);
- break;
- case 12:
- glPointSize(64.0);
- break;
- case 13:
- spin = 1 - spin;
- if (animate && (spin || motion)) {
- glutIdleFunc(idle);
- } else {
- glutIdleFunc(NULL);
- }
- break;
- case 14:
- numPoints = 200;
- break;
- case 15:
- numPoints = 500;
- break;
- case 16:
- numPoints = 1000;
- break;
- case 17:
- numPoints = 2000;
- break;
- case 666:
- exit(0);
- }
- glutPostRedisplay();
-}
-
-/* ARGSUSED1 */
-static void
-key(unsigned char c, int x, int y)
-{
- switch (c) {
- case 13:
- animate = 1 - animate; /* toggle. */
- if (animate && (motion || spin)) {
- glutIdleFunc(idle);
- } else {
- glutIdleFunc(NULL);
- }
- break;
- case ' ':
- animate = 1;
- makePointList();
- glutIdleFunc(idle);
- break;
- case 'o':
- case 'O':
- org ^= 1;
-#ifdef GL_VERSION_2_0
-#ifdef GL_ARB_point_parameters
- glPointParameteri(GL_POINT_SPRITE_COORD_ORIGIN,
- org ? GL_LOWER_LEFT : GL_UPPER_LEFT);
-#endif
-#endif
- glutPostRedisplay();
- break;
- case 't':
- case 'T':
- sprite ^= 1;
- glutPostRedisplay();
- break;
- case 's':
- case 'S':
- (smooth ^= 1) ? glEnable(GL_POINT_SMOOTH) : glDisable(GL_POINT_SMOOTH);
- glutPostRedisplay();
- break;
- case '0':
- glPointSize(1.0);
- glutPostRedisplay();
- break;
- case '1':
- glPointSize(16.0);
- glutPostRedisplay();
- break;
- case '2':
- glPointSize(32.0);
- glutPostRedisplay();
- break;
- case '3':
- glPointSize(64.0);
- glutPostRedisplay();
- break;
- case '4':
- glPointSize(128.0);
- glutPostRedisplay();
- break;
- case 27:
- exit(0);
- }
-}
-
-
-
-static void
-makeSprite(void)
-{
- GLubyte texture[16][16][4];
- int i, j;
-
- if (!glutExtensionSupported("GL_ARB_point_sprite")) {
- printf("Sorry, this demo requires GL_ARB_point_sprite.\n");
- exit(0);
- }
- if (!glutExtensionSupported("GL_ARB_point_parameters")) {
- printf("Sorry, this demo requires GL_ARB_point_parameters.\n");
- exit(0);
- }
-
- for (i = 0; i < 16; i++) {
- for (j = 0; j < 16; j++) {
- if (spritePattern[i][j]) {
- texture[i][j][0] = 255;
- texture[i][j][1] = 255;
- texture[i][j][2] = 255;
- texture[i][j][3] = 255;
- }
- else {
- texture[i][j][0] = 255;
- texture[i][j][1] = 0;
- texture[i][j][2] = 0;
- texture[i][j][3] = 0;
- }
- }
- }
-
- glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE,
- texture);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-#ifdef GL_ARB_point_sprite
- glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE);
-#endif
-}
-
-
-static void
-reshape(int width, int height)
-{
- GLfloat h = (GLfloat) height / (GLfloat) width;
-
- glViewport(0, 0, (GLint) width, (GLint) height);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glFrustum(-1.0, 1.0, -h, h, 2.0, 30.0);
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
- glTranslatef(0.0, 0.0, -10.0);
-}
-
-int
-main(int argc, char **argv)
-{
- int i;
-
- glutInitWindowSize(600,300);
- glutInit(&argc, argv);
- glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH | GLUT_MULTISAMPLE);
-
- for (i=1; i<argc; i++) {
- if(!strcmp("-noms", argv[i])) {
- glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
- printf("forcing no multisampling\n");
- } else if(!strcmp("-nomipmaps", argv[i])) {
- useMipmaps = 0;
- } else if(!strcmp("-nearest", argv[i])) {
- linearFiltering = 0;
- }
- }
- glutCreateWindow("sprite blast");
- glewInit();
- glutReshapeFunc(reshape);
- glutDisplayFunc(redraw);
- glutMouseFunc(mouse);
- glutMotionFunc(mouseMotion);
- glutVisibilityFunc(visible);
- glutKeyboardFunc(key);
- glutCreateMenu(menu);
- glutAddMenuEntry("Reset time", 0);
- glutAddMenuEntry("Constant", 1);
- glutAddMenuEntry("Linear", 2);
- glutAddMenuEntry("Quadratic", 3);
- glutAddMenuEntry("Blend on", 4);
- glutAddMenuEntry("Blend off", 5);
- glutAddMenuEntry("Threshold 1", 6);
- glutAddMenuEntry("Threshold 10", 7);
- glutAddMenuEntry("Point smooth on", 8);
- glutAddMenuEntry("Point smooth off", 9);
- glutAddMenuEntry("Point size 16", 10);
- glutAddMenuEntry("Point size 32", 11);
- glutAddMenuEntry("Point size 64", 12);
- glutAddMenuEntry("Toggle spin", 13);
- glutAddMenuEntry("200 points ", 14);
- glutAddMenuEntry("500 points ", 15);
- glutAddMenuEntry("1000 points ", 16);
- glutAddMenuEntry("2000 points ", 17);
- glutAddMenuEntry("Quit", 666);
- glutAttachMenu(GLUT_RIGHT_BUTTON);
-
- makePointList();
- makeSprite();
-
- glShadeModel(GL_FLAT);
- glEnable(GL_DEPTH_TEST);
- glEnable(GL_POINT_SMOOTH);
- glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
- glPointSize(32.0);
-#ifdef GL_ARB_point_parameters
- glPointParameterfvARB(GL_POINT_DISTANCE_ATTENUATION_ARB, theQuad);
-#endif
-
- glutMainLoop();
- return 0; /* ANSI C requires main to return int. */
-}
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