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-rw-r--r--hacks/glx/providence.c810
1 files changed, 0 insertions, 810 deletions
diff --git a/hacks/glx/providence.c b/hacks/glx/providence.c
deleted file mode 100644
index 5c06d31..0000000
--- a/hacks/glx/providence.c
+++ /dev/null
@@ -1,810 +0,0 @@
-/*
- * Permission to use, copy, modify, and distribute this software and its
- * documentation for any purpose and without fee is hereby granted,
- * provided that the above copyright notice appear in all copies and that
- * both that copyright notice and this permission notice appear in
- * supporting documentation.
- *
- * This file is provided AS IS with no warranties of any kind. The author
- * shall have no liability with respect to the infringement of copyrights,
- * trade secrets or any patents by this file or any part thereof. In no
- * event will the author be liable for any lost revenue or profits or
- * other special, indirect and consequential damages.
- *
- * Copyright 2004 Blair Tennessy
- */
-
-#ifdef STANDALONE
-#define DEFAULTS "*delay: 20000 \n" \
- "*showFPS: False \n" \
- "*wireframe: False \n"
-
-# define release_providence 0
-#include "xlockmore.h"
-#else
-#include "xlock.h"
-#endif
-
-#include "gltrackball.h"
-
-#define DEF_SOLIDPROVIDENCE "False"
-#define DEF_EYE "True"
-
-static int eye;
-
-static XrmOptionDescRec opts[] = {
- {"-eye", ".providence.eye", XrmoptionNoArg, "on"},
- {"+eye", ".providence.eye", XrmoptionNoArg, "off"}
-};
-
-static argtype vars[] = {
- {&eye, "eye", "Eye", DEF_EYE, t_Bool}
-};
-
-static OptionStruct desc[] = {
- {"-/+eye", "turn on/off eye of providence"}
-};
-
-ENTRYPOINT ModeSpecOpt providence_opts = {
- sizeof opts / sizeof opts[0], opts,
- sizeof vars / sizeof vars[0], vars, desc
-};
-
-#ifdef USE_MODULES
-ModStruct providence_description = {
- "providence", "init_providence", "draw_providence",
- (char *) NULL, "draw_providence", "change_providence",
- (char *) NULL, &providence_opts, 1000, 1, 1, 1, 4, 1.0, "",
- "draws pyramid with glory", 0, NULL
-};
-#endif
-
-#define Scale4Window 0.3
-#define Scale4Iconic 0.4
-
-#define sqr(A) ((A)*(A))
-
-#ifndef Pi
-#define Pi M_PI
-#endif
-
-/* brick texture */
-#define checkImageWidth 64
-#define checkImageHeight 64
-
-#define EYE_PARTICLE_COUNT 2000
-
-#define LOOKUPSIZE (3600/5) /* 3600 was way too much RAM on iOS */
-#define EYELENGTH 300
-
-#define EPSILON 0.0001
-#define PARTICLE_COUNT 2000
-#define FPS 50
-
-
-typedef struct {
- GLint WindH, WindW;
- GLXContext *glx_context;
- trackball_state *trackball;
- Bool button_down_p;
- GLfloat position0[4];
- GLubyte checkImage[checkImageWidth][checkImageHeight][3];
- GLuint bricktexture;
-
- int mono, wire;
- double camera_velocity;
- double camera_z;
-
- int pyramidlist;
- double currenttime;
- double theta;
- double theta_scale;
-
- /* This structure is so large that debugging malloc requires
- $MALLOC_PERMIT_INSANE_REQUESTS to be set under iOS... */
- double particles[PARTICLE_COUNT][5];
- int eyeparticles[EYE_PARTICLE_COUNT][2];
- double lookup[LOOKUPSIZE][EYELENGTH][2];
- double lookup2[LOOKUPSIZE][EYELENGTH][2];
-
-} providencestruct;
-
-/* lighting variables */
-/*static const GLfloat front_shininess[] = {60.0};*/
-/*static const GLfloat front_specular[] = {0.2, 0.2, 0.2, 1.0};*/
-/*static const GLfloat ambient[] = {0.8, 0.8, 0.8, 1.0};*/
-static const GLfloat ambient2[] = {0.25, 0.25, 0.25, 1.0};
-static const GLfloat diffuse[] = {1.0, 1.0, 1.0, 1.0};
-static const GLfloat lmodel_ambient[] = {0.5, 0.5, 0.5, 1.0};
-static const GLfloat lmodel_twoside[] = {GL_TRUE};
-
-/* gray-gray */
-
-static const GLfloat MaterialGlory[] = {0.04, 0.30, 0.22, 0.7};
-static const GLfloat MaterialGloryB[] = {0.07, 0.50, 0.36, 0.6};
-
-static const GLfloat MaterialGloryF[] = {0.07, 0.50, 0.36, 1.0};
-/* static const GLfloat MaterialGloryF[] = {0.06, 0.38, 0.27, 1.0}; */
-/*static const GLfloat MaterialGloryE[] = {0.06, 0.38, 0.27, 0.3};*/
-static const GLfloat MaterialGloryM[] = {0.5, 0.5, 0.5, 0.5};
-static const GLfloat MaterialGloryMB[] = {0.36, 0.36, 0.36, 0.4};
-/*static const GLfloat MaterialGreenback[4] = {0.04, 0.30, 0.22, 1.0};*/
-/*static const GLfloat MaterialBlack[4] = {0.0, 0.0, 0.0, 1.0};*/
-
-static const GLfloat MaterialGray5[] = {0.5, 0.5, 0.5, 1.0};
-/*static const GLfloat MaterialGray6[] = {0.6, 0.6, 0.6, 1.0};*/
-
-static providencestruct *providence = (providencestruct *) NULL;
-
-#define NUM_SCENES 2
-
-/* build brick texture */
-static void make_brick(providencestruct *mp)
-{
- int i, j, c;
-
- for (i = 0; i < checkImageWidth; i++) {
- for (j = 0; j < checkImageHeight; j++) {
- c = i % 16 == 15 ? 255 : (j + 48*(i / 16))%64 == 0 ? 255 :
- 102 + random() % 102;
- mp->checkImage[i][j][0] = (GLubyte) c;
- mp->checkImage[i][j][1] = (GLubyte) c;
- mp->checkImage[i][j][2] = (GLubyte) c;
- }
- }
-
- glGenTextures(1, &mp->bricktexture);
- glBindTexture(GL_TEXTURE_2D, mp->bricktexture);
-
- glTexImage2D(GL_TEXTURE_2D, 0, 3, checkImageWidth,
- checkImageHeight, 0, GL_RGB, GL_UNSIGNED_BYTE,
- &mp->checkImage[0][0]);
-}
-
-
-/* build eye lookup table */
-static void build_eye(providencestruct *mp)
-{
- int i, j;
- double x;
- double inc = 0.1 / EYELENGTH;
- double inc2 = 2.4*Pi / EYELENGTH;
-
- /* describe all values tangentially out from pupil */
- for(i = 0; i < LOOKUPSIZE; ++i) {
- double r = i * 2*Pi / LOOKUPSIZE;/*x + inc;*/
- double sr = sin(r);
- double cr = cos(r);
- x = 0.07;
-
- for(j = 0; j < EYELENGTH; ++j) {
- mp->lookup[i][j][0] = x*sr;
- mp->lookup[i][j][1] = x*cr;
- x += inc;
- }
- }
-
- /* lookup2: dollar sign */
- for(i = 0; i < LOOKUPSIZE; ++i) {
- double y = -1.2*Pi;
-
- for(j = 0; j < EYELENGTH; ++j) {
- if(i % 2) {
- mp->lookup2[i][j][0] = sin(y)/6.0 + i/36000.0 - 0.05;
- mp->lookup2[i][j][1] = i%4 ? y/12.0 - 0.05 : 1.2*Pi-y/12.0 + 0.05;
- }
- else {
- mp->lookup2[i][j][0] = i/36000.0 - 0.05;
- mp->lookup2[i][j][1] = y/9.0 - 0.05;
- }
- y += inc2;
- }
- }
-}
-
-
-static double min(double a, double b)
-{
- return a < b ? a : b;
-}
-
-static double max(double a, double b)
-{
- return a > b ? a : b;
-}
-
-static void init_particle(providencestruct *mp, double particle[5])
-{
- /* position along glory */
- double p = (random() % 485410) / 100000.0;
-
- /* on a plane */
- particle[2] = 0.0;
-
- if(p < 1.5) {
- particle[0] = p - 0.75;
- particle[1] = -0.75001;
- }
- else if(p < 1.5 + sqrt(45)/4.0) {
- double d = p - 1.5;
- particle[0] = 0.75 - d*cos(atan(2.0));
- particle[1] = d*sin(atan(2.0)) - 0.75;
- }
- else {
- double d = 4.8541 - p;
- particle[0] = -0.75 + d*cos(atan(2.0));
- particle[1] = d*sin(atan(2.0)) - 0.75;
- }
-
- particle[3] = mp->currenttime;
- particle[4] = 1.25 + (random()%10)/10.0;
-}
-
-/* init glory particles */
-static void init_particles(providencestruct *mp)
-{
- int i;
- for(i = 0; i < PARTICLE_COUNT; ++i) {
- init_particle(mp, mp->particles[i]);
-
- /* set initial time */
- mp->particles[i][3] = mp->currenttime - (random()%1250)/1000.0;
- }
-
- /* init eye particles */
- for(i = 0; i < EYE_PARTICLE_COUNT; ++i) {
- mp->eyeparticles[i][0] = random()%LOOKUPSIZE;
- mp->eyeparticles[i][1] = random()%EYELENGTH;
- }
-}
-
-
-/* ugg, should be a priority queue if next event times known */
-static void update_particles(providencestruct *mp)
-{
- int i;
-
- for(i = 0; i < PARTICLE_COUNT; ++i) {
- /* check for time elapse */
- if(mp->currenttime > mp->particles[i][3] + mp->particles[i][4])
- init_particle(mp, mp->particles[i]);
- }
-
- /* now update eye particles */
- for(i = 0; i < EYE_PARTICLE_COUNT; ++i) {
-/* int x = eyeparticles[i][1] + random()%16; */
- int x = mp->eyeparticles[i][1] + random()%(cos(mp->theta) < 0.0 ? 8 : 16);
-
- /* reset if dead */
- if(x >= EYELENGTH || random()%(cos(mp->theta) < 0.0 ? 40 : 10) == 0) {
-
-/* if(x > EYELENGTH || (x > EYELENGTH/(2/3.0) && random()%7 == 0)) { */
- mp->eyeparticles[i][0] = random()%LOOKUPSIZE;
- mp->eyeparticles[i][1] = random()%40;
- }
- else {
- mp->eyeparticles[i][1] = x;
- }
- }
-}
-
-/* draw the pyramid */
-static void draw_seal(providencestruct *mp)
-{
- int i;
- double base = sqrt(2.0);
- double top = 1.0 / sqrt(2.0);
- double tmod = 7.0/6.0;
-
- glPushMatrix();
-
- /* set options for mono, wireframe */
- if(mp->wire) {
- glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
- glDisable(GL_LIGHTING);
- glDisable(GL_TEXTURE_2D);
- }
- else {
- glEnable(GL_TEXTURE_2D);
- glBindTexture(GL_TEXTURE_2D, mp->bricktexture);
-
- glEnable(GL_LIGHTING);
-
- glColor4fv(mp->mono ? MaterialGray5 : MaterialGloryF);
- glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE,
- mp->mono ? MaterialGray5 : MaterialGloryF);
- }
-
- glRotatef(45.0, 0.0, 1.0, 0.0);
- glTranslatef(0.0, -3.25, 0.0);
-
- for(i = 0; i < 4; ++i) {
- glRotatef(i*90.0, 0.0, 1.0, 0.0);
-
- glBegin(GL_QUADS);
- glNormal3f(1 / sqrt(6.0), 2 / sqrt(6.0), 1 / sqrt(6.0));
- glTexCoord2f(-base, 0.0);
- glVertex3f(-base, 0.0, base);
- glTexCoord2f(base, 0.0);
- glVertex3f(base, 0.0, base);
- glTexCoord2f(top, 13.0/4.0);
- glVertex3f(top, 2.0, top);
- glTexCoord2f(-top, 13.0/4.0);
- glVertex3f(-top, 2.0, top);
- glEnd();
- }
-
- glBegin(GL_QUADS);
-
- /* top */
- glNormal3f(0.0, 1.0, 0.0);
- glTexCoord2f(0.02, 0.0);
- glVertex3f(-top, 2.0, top);
- glTexCoord2f(2.0*top, 0.0);
- glVertex3f(top, 2.0, top);
- glTexCoord2f(2.0*top, tmod*2.1*top);
- glVertex3f(top, 2.0, -top);
- glTexCoord2f(0.02, tmod*2.1*top);
- glVertex3f(-top, 2.0, -top);
-
- /* base */
- glNormal3f(0.0, -1.0, 0.0);
- glTexCoord2f(-base, 0.0);
- glVertex3f(-base, 0.0, -base);
- glTexCoord2f(top, 0.0);
- glVertex3f(base, 0.0, -base);
- glTexCoord2f(top, top*13.0/4.0);
- glVertex3f(base, 0.0, base);
- glTexCoord2f(-top, top*13.0/4.0);
- glVertex3f(-base, 0.0, base);
-
- glEnd();
-
- glPopMatrix();
- glDisable(GL_TEXTURE_2D);
-}
-
-/* draw glory */
-static void draw_glory(providencestruct *mp)
-{
- int i;
-
- if(mp->wire) {
- glBegin(GL_TRIANGLES);
- glVertex3f(-0.75, -0.75, 0.0);
- glVertex3f(0.75, -0.75, 0.0);
- glVertex3f(0.0, 0.75, 0.0);
-
- glVertex3f(0.0, 0.75, 0.0);
- glVertex3f(0.75, -0.75, 0.0);
- glVertex3f(-0.75, -0.75, 0.0);
- glEnd();
- return;
- }
-
- /* draw particles */
- glDisable(GL_LIGHTING);
- glPushMatrix();
- glEnable(GL_BLEND);
-
- /* glory colour lines */
- glColor4fv(mp->mono ? MaterialGloryM : MaterialGlory);
- glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE,
- mp->mono ? MaterialGloryM : MaterialGlory);
-
- glBegin(GL_LINES);
- for(i = 0; i < PARTICLE_COUNT/2; ++i) {
- double t = mp->currenttime - mp->particles[i][3];
- double th = atan(mp->particles[i][1] / mp->particles[i][0]);
- if(mp->particles[i][0] < 0.0)
- th += Pi;
-
- glVertex3f(mp->particles[i][0], mp->particles[i][1], mp->particles[i][2]);
- glVertex3f(mp->particles[i][0] + 0.2*cos(th)*t,
- mp->particles[i][1] + 0.2*sin(th)*t,
- mp->particles[i][2]);
- }
- glEnd();
-
- /* gloryb colour lines */
- glColor4fv(mp->mono ? MaterialGloryMB : MaterialGloryB);
- glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE,
- mp->mono ? MaterialGloryMB : MaterialGloryB);
- glBegin(GL_LINES);
- for(; i < PARTICLE_COUNT; ++i) {
- double t = mp->currenttime - mp->particles[i][3];
- double th = atan(mp->particles[i][1] / mp->particles[i][0]);
- if(mp->particles[i][0] < 0.0)
- th += Pi;
-
- glVertex3f(mp->particles[i][0], mp->particles[i][1], mp->particles[i][2]);
- glVertex3f(mp->particles[i][0] + 0.2*cos(th)*t,
- mp->particles[i][1] + 0.2*sin(th)*t,
- mp->particles[i][2]);
- }
- glEnd();
-
- glPopMatrix();
- glEnable(GL_LIGHTING);
-}
-
-/* draw eye of providence */
-static void draw_eye(providencestruct *mp)
-{
- int i;
-
- /* draw wireeye */
- if(mp->wire) {
- glBegin(GL_TRIANGLES);
- glVertex3f(-0.25, -0.25, 0.0);
- glVertex3f(0.25, -0.25, 0.0);
- glVertex3f(0.0, 0.25, 0.0);
- glEnd();
- return;
- }
-
- /* draw particles */
- glDisable(GL_LIGHTING);
- glPushMatrix();
- glEnable(GL_BLEND);
-
- /* eye */
- glColor4fv(mp->mono ? MaterialGloryM : MaterialGlory);
- glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE,
- mp->mono ? MaterialGloryM : MaterialGlory);
-
- /* draw eye particles on z = 0 plane */
- glBegin(GL_POINTS);
- for(i = 0; i < EYE_PARTICLE_COUNT/2; ++i) {
- glVertex3f(mp->lookup[mp->eyeparticles[i][0]][mp->eyeparticles[i][1]][0],
- mp->lookup[mp->eyeparticles[i][0]][mp->eyeparticles[i][1]][1],
- 0.0);
- }
- glEnd();
-
- /* eye */
- glColor4fv(mp->mono ? MaterialGloryMB : MaterialGloryB);
- glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE,
- mp->mono ? MaterialGloryMB : MaterialGloryB);
-
- /* draw eye particles on z = 0 plane */
- glBegin(GL_POINTS);
- for(; i < EYE_PARTICLE_COUNT; ++i) {
- glVertex3f(mp->lookup[mp->eyeparticles[i][0]][mp->eyeparticles[i][1]][0],
- mp->lookup[mp->eyeparticles[i][0]][mp->eyeparticles[i][1]][1],
- 0.0);
- }
- glEnd();
-
-
- /* draw scaled particles */
- glPushMatrix();
- glScalef(3.3, 2.2, 3.3);
-
- /* eye */
- glColor4fv(mp->mono ? MaterialGloryMB : MaterialGloryB);
- glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE,
- mp->mono ? MaterialGloryMB : MaterialGloryB);
-
- /* draw eye particles on z = 0 plane */
- glBegin(GL_POINTS);
- for(i = 0; i < EYE_PARTICLE_COUNT/2; ++i) {
- glVertex3f(mp->lookup[mp->eyeparticles[i][0]][mp->eyeparticles[i][1]][0],
- mp->lookup[mp->eyeparticles[i][0]][mp->eyeparticles[i][1]][1],
- 0.0);
- }
- glEnd();
-
- glColor4fv(mp->mono ? MaterialGloryM : MaterialGlory);
- glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE,
- mp->mono ? MaterialGloryM : MaterialGlory);
-
- /* draw eye particles on z = 0 plane */
- glBegin(GL_POINTS);
- for(; i < EYE_PARTICLE_COUNT; ++i) {
- glVertex3f(mp->lookup[mp->eyeparticles[i][0]][mp->eyeparticles[i][1]][0],
- mp->lookup[mp->eyeparticles[i][0]][mp->eyeparticles[i][1]][1],
- 0.0);
- }
- glEnd();
-
- glPopMatrix();
-
- glPopMatrix();
- glEnable(GL_LIGHTING);
-}
-
-/* draw eye of providence */
-static void draw_eye2(providencestruct *mp)
-{
- int i;
-
- /* draw wireeye */
- if(mp->wire) {
- glBegin(GL_TRIANGLES);
- glVertex3f(0.0, 0.25, 0.0);
- glVertex3f(0.25, -0.25, 0.0);
- glVertex3f(-0.25, -0.25, 0.0);
- glEnd();
- return;
- }
-
- /* draw particles */
- glDisable(GL_LIGHTING);
- glPushMatrix();
- glEnable(GL_BLEND);
-
- /* eye */
- glColor4fv(mp->mono ? MaterialGloryM : MaterialGlory);
- glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE,
- mp->mono ? MaterialGloryM : MaterialGlory);
-
- /* draw eye particles on z = 0 plane */
- glBegin(GL_POINTS);
- for(i = 0; i < EYE_PARTICLE_COUNT/2; ++i) {
- glVertex3f(mp->lookup2[mp->eyeparticles[i][0]][mp->eyeparticles[i][1]][0],
- mp->lookup2[mp->eyeparticles[i][0]][mp->eyeparticles[i][1]][1],
- 0.0);
- }
- glEnd();
-
- /* eye */
- glColor4fv(mp->mono ? MaterialGloryMB : MaterialGloryB);
- glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE,
- mp->mono ? MaterialGloryMB : MaterialGloryB);
-
- /* draw eye particles on z = 0 plane */
- glBegin(GL_POINTS);
- for(; i < EYE_PARTICLE_COUNT; ++i) {
- glVertex3f(mp->lookup2[mp->eyeparticles[i][0]][mp->eyeparticles[i][1]][0],
- mp->lookup2[mp->eyeparticles[i][0]][mp->eyeparticles[i][1]][1],
- 0.0);
- }
- glEnd();
-
- glPopMatrix();
- glEnable(GL_LIGHTING);
-}
-
-/* draw the scene */
-static void draw_providence_strip(ModeInfo *mi)
-{
- providencestruct *mp = &providence[MI_SCREEN(mi)];
- glTranslatef(0.0, 1.414, 0.0);
-
- mp->position0[0] = 1.6*sin(mp->theta);
- mp->position0[1] = 1.2;
- mp->position0[2] = 1.6*cos(mp->theta);
- mp->position0[3] = 0.0;
- glLightfv(GL_LIGHT0, GL_POSITION, mp->position0);
- glLightfv(GL_LIGHT0, GL_AMBIENT, ambient2);
- glEnable(GL_LIGHTING);
- glEnable(GL_LIGHT0);
-
- /* draw pyramid, glory */
- glDisable(GL_BLEND);
- glCallList(mp->pyramidlist);
- draw_glory(mp);
- if(eye) {
- if(cos(mp->theta) < 0.0)
- draw_eye2(mp);
- else
- draw_eye(mp);
- }
-
- return;
-}
-
-ENTRYPOINT void reshape_providence(ModeInfo * mi, int width, int height)
-{
- providencestruct *mp = &providence[MI_SCREEN(mi)];
- double h = (GLfloat) height / (GLfloat) width;
- int y = 0;
-
- if (width > height * 5) { /* tiny window: show middle */
- height = width * 3;
- y = -height/2;
- h = height / (GLfloat) width;
- }
-
- glViewport(0, y, mp->WindW = (GLint) width, mp->WindH = (GLint) height);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
-
- gluPerspective(45, 1/h, 0.001, 25.0);
-
- glMatrixMode(GL_MODELVIEW);
- glLineWidth(2.0);
- glPointSize(2.0);
-}
-
-static void pinit(providencestruct *mp)
-{
- glClearDepth(1.0);
-
- mp->currenttime = 0.0;
- init_particles(mp);
- make_brick(mp);
- build_eye(mp);
-
- /* build pyramid list */
- mp->pyramidlist = glGenLists(1);
- glNewList(mp->pyramidlist, GL_COMPILE);
- draw_seal(mp);
- glEndList();
-}
-
-/* event handling */
-ENTRYPOINT Bool providence_handle_event(ModeInfo *mi, XEvent *event)
-{
- providencestruct *mp = &providence[MI_SCREEN(mi)];
-
- switch(event->xany.type) {
- case ButtonPress:
- switch(event->xbutton.button) {
- case Button4:
- mp->camera_velocity += 1.0;
- return True;
- case Button5:
- mp->camera_velocity -= 1.0;
- return True;
- default:
- break;
- }
- break;
- default:
- break;
- }
-
- if (gltrackball_event_handler (event, mp->trackball,
- MI_WIDTH (mi), MI_HEIGHT (mi),
- &mp->button_down_p))
- return True;
-
- return False;
-}
-
-ENTRYPOINT void init_providence(ModeInfo *mi)
-{
- providencestruct *mp;
-
- MI_INIT(mi, providence);
- mp = &providence[MI_SCREEN(mi)];
- mp->trackball = gltrackball_init (False);
-
- mp->position0[0] = 1;
- mp->position0[1] = 5;
- mp->position0[2] = 1;
- mp->position0[3] = 1;
-
- mp->camera_velocity = -8.0;
-
- mp->mono = MI_IS_MONO(mi);
- mp->wire = MI_IS_WIREFRAME(mi);
-
-# ifdef HAVE_JWZGLES /* #### glPolygonMode other than GL_FILL unimplemented */
- mp->wire = 0;
-# endif
-
- /* make multiple screens rotate at slightly different rates. */
- mp->theta_scale = 0.7 + frand(0.6);
-
- if((mp->glx_context = init_GL(mi)) != NULL) {
- reshape_providence(mi, MI_WIDTH(mi), MI_HEIGHT(mi));
- /* glDrawBuffer(GL_BACK); */
- pinit(mp);
- }
- else
- MI_CLEARWINDOW(mi);
-}
-
-ENTRYPOINT void draw_providence(ModeInfo * mi)
-{
- providencestruct *mp;
-
- Display *display = MI_DISPLAY(mi);
- Window window = MI_WINDOW(mi);
-
- if(!providence)
- return;
- mp = &providence[MI_SCREEN(mi)];
-
- MI_IS_DRAWN(mi) = True;
-
- if(!mp->glx_context)
- return;
-
- glXMakeCurrent(display, window, *mp->glx_context);
-
- /* setup twoside lighting */
- glLightfv(GL_LIGHT0, GL_AMBIENT, ambient2);
- glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
- glLightfv(GL_LIGHT0, GL_POSITION, mp->position0);
-
- glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
- glLightModelfv(GL_LIGHT_MODEL_TWO_SIDE, lmodel_twoside);
- glEnable(GL_LIGHTING);
- glEnable(GL_LIGHT0);
-
- glEnable(GL_NORMALIZE);
- glFrontFace(GL_CCW);
-/* glDisable(GL_CULL_FACE); */
- glEnable(GL_CULL_FACE);
- glCullFace(GL_BACK);
- glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-
- glShadeModel(GL_SMOOTH);
- glEnable(GL_DEPTH_TEST);
- glDepthFunc(GL_LEQUAL);
-
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_REPEAT);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_REPEAT);
- glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
-
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- glPushMatrix();
- glRotatef(current_device_rotation(), 0, 0, 1);
-
- /* modify camera */
- if(fabs(mp->camera_velocity) > EPSILON) {
- mp->camera_z = max(min(mp->camera_z + 0.1*mp->camera_velocity, -4.0), -12.0);
- mp->camera_velocity = 0.95*mp->camera_velocity;
- }
-
- /* rotate providence */
- glTranslatef(0.0, 0.0, mp->camera_z + sin(mp->theta/4.0));
- glRotatef(10.0+20.0*sin(mp->theta/2.0), 1.0, 0.0, 0.0);
- gltrackball_rotate(mp->trackball);
- glRotatef(mp->theta * 180.0 / Pi, 0.0, -1.0, 0.0);
-
-#if 0
- {
- GLfloat s = (MI_WIDTH(mi) < MI_HEIGHT(mi)
- ? (MI_WIDTH(mi) / (GLfloat) MI_HEIGHT(mi))
- : 1);
- glScalef (s, s, s);
- }
-#endif
-
- /* draw providence */
- draw_providence_strip(mi);
- glPopMatrix();
-
- if(MI_IS_FPS(mi)) do_fps (mi);
- glFlush();
-
- glXSwapBuffers(display, window);
-
- /* update */
- mp->currenttime += 1.0 / FPS;
- mp->theta = mp->currenttime / 2.0 * mp->theta_scale;
- update_particles(mp);
-}
-
-#ifndef STANDALONE
-ENTRYPOINT void change_providence(ModeInfo * mi)
-{
- providencestruct *mp = &providence[MI_SCREEN(mi)];
-
- if (!mp->glx_context)
- return;
-
- glXMakeCurrent(MI_DISPLAY(mi), MI_WINDOW(mi), *mp->glx_context);
- pinit();
-}
-#endif /* !STANDALONE */
-
-ENTRYPOINT void free_providence(ModeInfo * mi)
-{
- providencestruct *mp = &providence[MI_SCREEN(mi)];
- if (!mp->glx_context) return;
- glXMakeCurrent (MI_DISPLAY(mi), MI_WINDOW(mi), *mp->glx_context);
- gltrackball_free (mp->trackball);
- if (glIsList(mp->pyramidlist)) glDeleteLists(mp->pyramidlist, 1);
- if (mp->bricktexture) glDeleteTextures (1, &mp->bricktexture);
-}
-
-XSCREENSAVER_MODULE ("Providence", providence)
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2026-03-09 19:21:49 +0100