* Copyright 2004 Blair Tennessy
*/
-#include <X11/Intrinsic.h>
-
#ifdef STANDALONE
-#define PROGCLASS "Providence"
-#define HACK_INIT init_providence
-#define HACK_DRAW draw_providence
-#define HACK_RESHAPE reshape_providence
-#define HACK_HANDLE_EVENT providence_handle_event
-#define EVENT_MASK PointerMotionMask
-#define providence_opts xlockmore_opts
#define DEFAULTS "*delay: 20000 \n" \
"*showFPS: False \n" \
"*wireframe: False \n"
+# define refresh_providence 0
#include "xlockmore.h"
#else
#include "xlock.h"
#endif
-#include <GL/glu.h>
#include "gltrackball.h"
#define DEF_SOLIDPROVIDENCE "False"
{"-/+eye", "turn on/off eye of providence"}
};
-ModeSpecOpt providence_opts = {
+ENTRYPOINT ModeSpecOpt providence_opts = {
sizeof opts / sizeof opts[0], opts,
sizeof vars / sizeof vars[0], vars, desc
};
#define Pi M_PI
#endif
-int mono = 0, wire = 0;
-double camera_velocity = 0.0;
-double camera_z = -8.0;
-int camera_mode = 0;
+/* brick texture */
+#define checkImageWidth 64
+#define checkImageHeight 64
+
+#define EYE_PARTICLE_COUNT 2000
+
+#define LOOKUPSIZE 3600
+#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;
+
+ double particles[PARTICLE_COUNT][5];
+ int eyeparticles[EYE_PARTICLE_COUNT][2];
+ double lookup[LOOKUPSIZE][EYELENGTH][2];
+ double lookup2[LOOKUPSIZE][EYELENGTH][2];
+
} providencestruct;
/* lighting variables */
-GLfloat front_shininess[] = {60.0};
-GLfloat front_specular[] = {0.2, 0.2, 0.2, 1.0};
-GLfloat ambient[] = {0.8, 0.8, 0.8, 1.0};
-GLfloat ambient2[] = {0.25, 0.25, 0.25, 1.0};
-GLfloat diffuse[] = {1.0, 1.0, 1.0, 1.0};
-GLfloat position0[] = {1.0, 5.0, 1.0, 1.0};
-GLfloat position1[] = {-1.0, -5.0, 1.0, 1.0};
-GLfloat lmodel_ambient[] = {0.5, 0.5, 0.5, 1.0};
-GLfloat lmodel_twoside[] = {GL_TRUE};
+/*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 */
-GLfloat MaterialGlory[] = {0.04, 0.30, 0.22, 0.7};
-GLfloat MaterialGloryB[] = {0.07, 0.50, 0.36, 0.6};
-
-GLfloat MaterialGloryF[] = {0.07, 0.50, 0.36, 1.0};
-/* GLfloat MaterialGloryF[] = {0.06, 0.38, 0.27, 1.0}; */
-GLfloat MaterialGloryE[] = {0.06, 0.38, 0.27, 0.3};
-GLfloat MaterialGloryM[] = {0.5, 0.5, 0.5, 0.5};
-GLfloat MaterialGloryMB[] = {0.36, 0.36, 0.36, 0.4};
-GLfloat MaterialGreenback[4] = {0.04, 0.30, 0.22, 1.0};
-GLfloat MaterialBlack[4] = {0.0, 0.0, 0.0, 1.0};
+static const GLfloat MaterialGlory[] = {0.04, 0.30, 0.22, 0.7};
+static const GLfloat MaterialGloryB[] = {0.07, 0.50, 0.36, 0.6};
-GLfloat MaterialGray5[] = {0.5, 0.5, 0.5, 1.0};
-GLfloat MaterialGray6[] = {0.6, 0.6, 0.6, 1.0};
+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};*/
-double currenttime;
+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
-/* brick texture */
-#define checkImageWidth 64
-#define checkImageHeight 64
-GLubyte checkImage[checkImageWidth][checkImageHeight][3];
-GLuint bricktexture;
-
/* build brick texture */
-void make_brick(void) {
+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;
- checkImage[i][j][0] = (GLubyte) c;
- checkImage[i][j][1] = (GLubyte) c;
- checkImage[i][j][2] = (GLubyte) c;
+ mp->checkImage[i][j][0] = (GLubyte) c;
+ mp->checkImage[i][j][1] = (GLubyte) c;
+ mp->checkImage[i][j][2] = (GLubyte) c;
}
}
- glGenTextures(1, &bricktexture);
- glBindTexture(GL_TEXTURE_2D, bricktexture);
+ glGenTextures(1, &mp->bricktexture);
+ glBindTexture(GL_TEXTURE_2D, mp->bricktexture);
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_T,GL_REPEAT);
glTexImage2D(GL_TEXTURE_2D, 0, 3, checkImageWidth,
checkImageHeight, 0, GL_RGB, GL_UNSIGNED_BYTE,
- &checkImage[0][0]);
+ &mp->checkImage[0][0]);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
}
-/* int min */
-int mini(int a, int b) { return a < b ? a : b; }
-
-/* eye particles */
-#define EYE_PARTICLE_COUNT 2000
-int eyeparticles[EYE_PARTICLE_COUNT][2];
-
-/* lookup table for the eye */
-#define LOOKUPSIZE 3600
-#define EYELENGTH 300
-double lookup[LOOKUPSIZE][EYELENGTH][2];
-double lookup2[LOOKUPSIZE][EYELENGTH][2];
/* build eye lookup table */
-void build_eye(void) {
+static void build_eye(providencestruct *mp)
+{
int i, j;
double x;
double inc = 0.1 / EYELENGTH;
x = 0.07;
for(j = 0; j < EYELENGTH; ++j) {
- lookup[i][j][0] = x*sr;
- lookup[i][j][1] = x*cr;
+ mp->lookup[i][j][0] = x*sr;
+ mp->lookup[i][j][1] = x*cr;
x += inc;
}
}
for(j = 0; j < EYELENGTH; ++j) {
if(i % 2) {
- lookup2[i][j][0] = sin(y)/6.0 + i/36000.0 - 0.05;
- lookup2[i][j][1] = i%4 ? y/12.0 - 0.05 : 1.2*Pi-y/12.0 + 0.05;
+ 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 {
- lookup2[i][j][0] = i/36000.0 - 0.05;
- lookup2[i][j][1] = y/9.0 - 0.05;
+ mp->lookup2[i][j][0] = i/36000.0 - 0.05;
+ mp->lookup2[i][j][1] = y/9.0 - 0.05;
}
y += inc2;
}
}
}
-int pyramidlist;
-#define EPSILON 0.0001
-double min(double a, double b) {
+static double min(double a, double b)
+{
return a < b ? a : b;
}
-double max(double a, double b) {
+static double max(double a, double b)
+{
return a > b ? a : b;
}
-#define PARTICLE_COUNT 2000
-double particles[PARTICLE_COUNT][5];
-
-void init_particle(double particle[5]) {
+static void init_particle(providencestruct *mp, double particle[5])
+{
/* position along glory */
double p = (random() % 485410) / 100000.0;
particle[1] = d*sin(atan(2.0)) - 0.75;
}
- particle[3] = currenttime;
+ particle[3] = mp->currenttime;
particle[4] = 1.25 + (random()%10)/10.0;
}
/* init glory particles */
-void init_particles(void) {
+static void init_particles(providencestruct *mp)
+{
int i;
for(i = 0; i < PARTICLE_COUNT; ++i) {
- init_particle(particles[i]);
+ init_particle(mp, mp->particles[i]);
/* set initial time */
- particles[i][3] = currenttime - (random()%1250)/1000.0;
+ mp->particles[i][3] = mp->currenttime - (random()%1250)/1000.0;
}
/* init eye particles */
for(i = 0; i < EYE_PARTICLE_COUNT; ++i) {
- eyeparticles[i][0] = random()%LOOKUPSIZE;
- eyeparticles[i][1] = random()%EYELENGTH;
+ mp->eyeparticles[i][0] = random()%LOOKUPSIZE;
+ mp->eyeparticles[i][1] = random()%EYELENGTH;
}
}
-#define FPS 50
-double theta = 0.0;
/* ugg, should be a priority queue if next event times known */
-void update_particles(void) {
+static void update_particles(providencestruct *mp)
+{
int i;
for(i = 0; i < PARTICLE_COUNT; ++i) {
/* check for time elapse */
- if(currenttime > particles[i][3] + particles[i][4])
- init_particle(particles[i]);
+ 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 = eyeparticles[i][1] + random()%(cos(theta) < 0.0 ? 8 : 16);
+ int x = mp->eyeparticles[i][1] + random()%(cos(mp->theta) < 0.0 ? 8 : 16);
/* reset if dead */
- if(x > EYELENGTH || random()%(cos(theta) < 0.0 ? 40 : 10) == 0) {
+ if(x > EYELENGTH || random()%(cos(mp->theta) < 0.0 ? 40 : 10) == 0) {
/* if(x > EYELENGTH || (x > EYELENGTH/(2/3.0) && random()%7 == 0)) { */
- eyeparticles[i][0] = random()%LOOKUPSIZE;
- eyeparticles[i][1] = random()%40;
+ mp->eyeparticles[i][0] = random()%LOOKUPSIZE;
+ mp->eyeparticles[i][1] = random()%40;
}
else {
- eyeparticles[i][1] = x;
+ mp->eyeparticles[i][1] = x;
}
}
}
/* draw the pyramid */
-void draw_seal(void) {
+static void draw_seal(providencestruct *mp)
+{
int i;
double base = sqrt(2.0);
double top = 1.0 / sqrt(2.0);
glPushMatrix();
/* set options for mono, wireframe */
- if(wire) {
+ 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, bricktexture);
+ glBindTexture(GL_TEXTURE_2D, mp->bricktexture);
glEnable(GL_LIGHTING);
- glColor4fv(mono ? MaterialGray5 : MaterialGloryF);
+ glColor4fv(mp->mono ? MaterialGray5 : MaterialGloryF);
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE,
- mono ? MaterialGray5 : MaterialGloryF);
+ mp->mono ? MaterialGray5 : MaterialGloryF);
}
glRotatef(45.0, 0.0, 1.0, 0.0);
}
/* draw glory */
-void draw_glory(void) {
+static void draw_glory(providencestruct *mp)
+{
int i;
- if(wire) {
+ if(mp->wire) {
glBegin(GL_TRIANGLES);
glVertex3f(-0.75, -0.75, 0.0);
glVertex3f(0.75, -0.75, 0.0);
glEnable(GL_BLEND);
/* glory colour lines */
- glColor4fv(mono ? MaterialGloryM : MaterialGlory);
+ glColor4fv(mp->mono ? MaterialGloryM : MaterialGlory);
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE,
- mono ? MaterialGloryM : MaterialGlory);
+ mp->mono ? MaterialGloryM : MaterialGlory);
glBegin(GL_LINES);
for(i = 0; i < PARTICLE_COUNT/2; ++i) {
- double t = currenttime - particles[i][3];
- double th = atan(particles[i][1] / particles[i][0]);
- if(particles[i][0] < 0.0)
+ 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(particles[i][0], particles[i][1], particles[i][2]);
- glVertex3f(particles[i][0] + 0.2*cos(th)*t,
- particles[i][1] + 0.2*sin(th)*t,
- particles[i][2]);
+ 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(mono ? MaterialGloryMB : MaterialGloryB);
+ glColor4fv(mp->mono ? MaterialGloryMB : MaterialGloryB);
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE,
- mono ? MaterialGloryMB : MaterialGloryB);
+ mp->mono ? MaterialGloryMB : MaterialGloryB);
glBegin(GL_LINES);
for(; i < PARTICLE_COUNT; ++i) {
- double t = currenttime - particles[i][3];
- double th = atan(particles[i][1] / particles[i][0]);
- if(particles[i][0] < 0.0)
+ 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(particles[i][0], particles[i][1], particles[i][2]);
- glVertex3f(particles[i][0] + 0.2*cos(th)*t,
- particles[i][1] + 0.2*sin(th)*t,
- particles[i][2]);
+ 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();
}
/* draw eye of providence */
-void draw_eye(void) {
+static void draw_eye(providencestruct *mp)
+{
int i;
/* draw wireeye */
- if(wire) {
+ if(mp->wire) {
glBegin(GL_TRIANGLES);
glVertex3f(-0.25, -0.25, 0.0);
glVertex3f(0.25, -0.25, 0.0);
glEnable(GL_BLEND);
/* eye */
- glColor4fv(mono ? MaterialGloryM : MaterialGlory);
+ glColor4fv(mp->mono ? MaterialGloryM : MaterialGlory);
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE,
- mono ? MaterialGloryM : MaterialGlory);
+ mp->mono ? MaterialGloryM : MaterialGlory);
/* draw eye particles on z = 0 plane */
glBegin(GL_POINTS);
for(i = 0; i < EYE_PARTICLE_COUNT/2; ++i) {
- glVertex3f(lookup[eyeparticles[i][0]][eyeparticles[i][1]][0],
- lookup[eyeparticles[i][0]][eyeparticles[i][1]][1],
+ 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(mono ? MaterialGloryMB : MaterialGloryB);
+ glColor4fv(mp->mono ? MaterialGloryMB : MaterialGloryB);
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE,
- mono ? MaterialGloryMB : MaterialGloryB);
+ mp->mono ? MaterialGloryMB : MaterialGloryB);
/* draw eye particles on z = 0 plane */
glBegin(GL_POINTS);
for(; i < EYE_PARTICLE_COUNT; ++i) {
- glVertex3f(lookup[eyeparticles[i][0]][eyeparticles[i][1]][0],
- lookup[eyeparticles[i][0]][eyeparticles[i][1]][1],
+ 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();
glScalef(3.3, 2.2, 3.3);
/* eye */
- glColor4fv(mono ? MaterialGloryMB : MaterialGloryB);
+ glColor4fv(mp->mono ? MaterialGloryMB : MaterialGloryB);
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE,
- mono ? MaterialGloryMB : MaterialGloryB);
+ mp->mono ? MaterialGloryMB : MaterialGloryB);
/* draw eye particles on z = 0 plane */
glBegin(GL_POINTS);
for(i = 0; i < EYE_PARTICLE_COUNT/2; ++i) {
- glVertex3f(lookup[eyeparticles[i][0]][eyeparticles[i][1]][0],
- lookup[eyeparticles[i][0]][eyeparticles[i][1]][1],
+ 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(mono ? MaterialGloryM : MaterialGlory);
+ glColor4fv(mp->mono ? MaterialGloryM : MaterialGlory);
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE,
- mono ? MaterialGloryM : MaterialGlory);
+ mp->mono ? MaterialGloryM : MaterialGlory);
/* draw eye particles on z = 0 plane */
glBegin(GL_POINTS);
for(; i < EYE_PARTICLE_COUNT; ++i) {
- glVertex3f(lookup[eyeparticles[i][0]][eyeparticles[i][1]][0],
- lookup[eyeparticles[i][0]][eyeparticles[i][1]][1],
+ 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 eye of providence */
-void draw_eye2(void) {
+static void draw_eye2(providencestruct *mp)
+{
int i;
/* draw wireeye */
- if(wire) {
+ if(mp->wire) {
glBegin(GL_TRIANGLES);
glVertex3f(0.0, 0.25, 0.0);
glVertex3f(0.25, -0.25, 0.0);
glEnable(GL_BLEND);
/* eye */
- glColor4fv(mono ? MaterialGloryM : MaterialGlory);
+ glColor4fv(mp->mono ? MaterialGloryM : MaterialGlory);
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE,
- mono ? MaterialGloryM : MaterialGlory);
+ mp->mono ? MaterialGloryM : MaterialGlory);
/* draw eye particles on z = 0 plane */
glBegin(GL_POINTS);
for(i = 0; i < EYE_PARTICLE_COUNT/2; ++i) {
- glVertex3f(lookup2[eyeparticles[i][0]][eyeparticles[i][1]][0],
- lookup2[eyeparticles[i][0]][eyeparticles[i][1]][1],
+ 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(mono ? MaterialGloryMB : MaterialGloryB);
+ glColor4fv(mp->mono ? MaterialGloryMB : MaterialGloryB);
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE,
- mono ? MaterialGloryMB : MaterialGloryB);
+ mp->mono ? MaterialGloryMB : MaterialGloryB);
/* draw eye particles on z = 0 plane */
glBegin(GL_POINTS);
for(; i < EYE_PARTICLE_COUNT; ++i) {
- glVertex3f(lookup2[eyeparticles[i][0]][eyeparticles[i][1]][0],
- lookup2[eyeparticles[i][0]][eyeparticles[i][1]][1],
+ 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();
}
/* draw the scene */
-void draw_providence_strip(ModeInfo *mi) {
+static void draw_providence_strip(ModeInfo *mi)
+{
+ providencestruct *mp = &providence[MI_SCREEN(mi)];
glTranslatef(0.0, 1.414, 0.0);
- position0[0] = 1.6*sin(theta);
- position0[1] = 1.2;
- position0[2] = 1.6*cos(theta);
- position0[3] = 0.0;
- glLightfv(GL_LIGHT0, GL_POSITION, position0);
+ 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(pyramidlist);
- draw_glory();
+ glCallList(mp->pyramidlist);
+ draw_glory(mp);
if(eye) {
- if(cos(theta) < 0.0)
- draw_eye2();
+ if(cos(mp->theta) < 0.0)
+ draw_eye2(mp);
else
- draw_eye();
+ draw_eye(mp);
}
return;
}
-void reshape_providence(ModeInfo * mi, int width, int height) {
+ENTRYPOINT void reshape_providence(ModeInfo * mi, int width, int height)
+{
double h = (GLfloat) height / (GLfloat) width;
providencestruct *mp = &providence[MI_SCREEN(mi)];
glPointSize(2.0);
}
-static void pinit(void) {
+static void pinit(providencestruct *mp)
+{
glClearDepth(1.0);
glClearColor(0.0, 0.0, 0.0, 1.0);
/* setup twoside lighting */
glLightfv(GL_LIGHT0, GL_AMBIENT, ambient2);
glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
- glLightfv(GL_LIGHT0, GL_POSITION, position0);
+ 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);
- currenttime = 0.0;
- init_particles();
- make_brick();
- build_eye();
+ mp->currenttime = 0.0;
+ init_particles(mp);
+ make_brick(mp);
+ build_eye(mp);
glEnable(GL_NORMALIZE);
glFrontFace(GL_CCW);
glDepthFunc(GL_LEQUAL);
/* build pyramid list */
- pyramidlist = glGenLists(1);
- glNewList(pyramidlist, GL_COMPILE);
- draw_seal();
+ mp->pyramidlist = glGenLists(1);
+ glNewList(mp->pyramidlist, GL_COMPILE);
+ draw_seal(mp);
glEndList();
}
/* cleanup routine */
-void release_providence(ModeInfo * mi) {
+ENTRYPOINT void release_providence(ModeInfo * mi)
+{
if(providence) {
free((void *) providence);
}
/* event handling */
-Bool providence_handle_event(ModeInfo *mi, XEvent *event) {
+ENTRYPOINT Bool providence_handle_event(ModeInfo *mi, XEvent *event)
+{
providencestruct *mp = &providence[MI_SCREEN(mi)];
switch(event->xany.type) {
break;
case Button4:
- camera_velocity += 1.0;
+ mp->camera_velocity += 1.0;
break;
case Button5:
- camera_velocity -= 1.0;
+ mp->camera_velocity -= 1.0;
break;
}
return True;
}
-void init_providence(ModeInfo *mi) {
+ENTRYPOINT void init_providence(ModeInfo *mi)
+{
providencestruct *mp;
if(!providence) {
mp = &providence[MI_SCREEN(mi)];
mp->trackball = gltrackball_init ();
- mono = MI_IS_MONO(mi);
- wire = MI_IS_WIREFRAME(mi);
+ 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);
+
+ /* 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();
+ pinit(mp);
}
else
MI_CLEARWINDOW(mi);
}
-void draw_providence(ModeInfo * mi) {
+ENTRYPOINT void draw_providence(ModeInfo * mi)
+{
providencestruct *mp;
Display *display = MI_DISPLAY(mi);
glPushMatrix();
/* modify camera */
- if(fabs(camera_velocity) > EPSILON) {
- camera_z = max(min(camera_z + 0.1*camera_velocity, -4.0), -12.0);
- camera_velocity = 0.95*camera_velocity;
+ 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, camera_z + sin(theta/4.0));
- glRotatef(10.0+20.0*sin(theta/2.0), 1.0, 0.0, 0.0);
+ 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(theta * 180.0 / Pi, 0.0, -1.0, 0.0);
+ glRotatef(mp->theta * 180.0 / Pi, 0.0, -1.0, 0.0);
/* draw providence */
draw_providence_strip(mi);
glXSwapBuffers(display, window);
/* update */
- currenttime += 1.0 / FPS;
- theta = currenttime / 2.0;
- update_particles();
+ mp->currenttime += 1.0 / FPS;
+ mp->theta = mp->currenttime / 2.0 * mp->theta_scale;
+ update_particles(mp);
}
-void change_providence(ModeInfo * mi) {
+#ifndef STANDALONE
+ENTRYPOINT void change_providence(ModeInfo * mi)
+{
providencestruct *mp = &providence[MI_SCREEN(mi)];
if (!mp->glx_context)
glXMakeCurrent(MI_DISPLAY(mi), MI_WINDOW(mi), *(mp->glx_context));
pinit();
}
+#endif /* !STANDALONE */
+
+XSCREENSAVER_MODULE ("Providence", providence)
projects / xscreensaver / blobdiff