diff options
Diffstat (limited to 'hacks/glx/bouncingcow.c')
| -rw-r--r-- | hacks/glx/bouncingcow.c | 224 |
1 files changed, 170 insertions, 54 deletions
diff --git a/hacks/glx/bouncingcow.c b/hacks/glx/bouncingcow.c index bcbea24..5dc9466 100644 --- a/hacks/glx/bouncingcow.c +++ b/hacks/glx/bouncingcow.c @@ -1,4 +1,4 @@ -/* bouncingcow, Copyright (c) 2003-2018 Jamie Zawinski <jwz@jwz.org> +/* bouncingcow, Copyright (c) 2003-2019 Jamie Zawinski <jwz@jwz.org> * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that @@ -19,6 +19,7 @@ # define release_cow 0 #define DEF_SPEED "1.0" #define DEF_TEXTURE "(none)" +#define DEF_MATHEMATICAL "False" #undef countof #define countof(x) (sizeof((x))/sizeof((*x))) @@ -68,6 +69,8 @@ typedef struct { GLuint *dlists; GLuint texture; + enum { BOUNCE, INFLATE, DEFLATE } mode; + GLfloat ratio; int nfloaters; floater *floaters; @@ -78,16 +81,20 @@ static cow_configuration *bps = NULL; static GLfloat speed; static const char *do_texture; +static Bool mathematical; static XrmOptionDescRec opts[] = { { "-speed", ".speed", XrmoptionSepArg, 0 }, {"-texture", ".texture", XrmoptionSepArg, 0 }, {"+texture", ".texture", XrmoptionNoArg, "(none)" }, + {"-mathematical", ".mathematical", XrmoptionNoArg, "True" }, + {"+mathematical", ".mathematical", XrmoptionNoArg, "False" }, }; static argtype vars[] = { {&speed, "speed", "Speed", DEF_SPEED, t_Float}, {&do_texture, "texture", "Texture", DEF_TEXTURE, t_String}, + {&mathematical,"mathematical","Mathematical",DEF_MATHEMATICAL,t_Bool}, }; ENTRYPOINT ModeSpecOpt cow_opts = {countof(opts), opts, countof(vars), vars, NULL}; @@ -196,29 +203,33 @@ cow_handle_event (ModeInfo *mi, XEvent *event) /* Textures */ -static Bool +static void load_texture (ModeInfo *mi, const char *filename) { + cow_configuration *bp = &bps[MI_SCREEN(mi)]; Display *dpy = mi->dpy; Visual *visual = mi->xgwa.visual; char buf[1024]; XImage *image; + bp->texture = 0; if (MI_IS_WIREFRAME(mi)) - return False; + return; if (!filename || !*filename || !strcasecmp (filename, "(none)")) { glDisable (GL_TEXTURE_2D); - return False; + return; } image = file_to_ximage (dpy, visual, filename); - if (!image) return False; + if (!image) return; clear_gl_error(); + glGenTextures (1, &bp->texture); + glBindTexture (GL_TEXTURE_2D, bp->texture); glTexImage2D (GL_TEXTURE_2D, 0, GL_RGBA, image->width, image->height, 0, GL_RGBA, GL_UNSIGNED_BYTE, image->data); @@ -228,62 +239,24 @@ load_texture (ModeInfo *mi, const char *filename) glPixelStorei (GL_UNPACK_ALIGNMENT, 4); glPixelStorei (GL_UNPACK_ROW_LENGTH, image->width); - - return True; } -ENTRYPOINT void -init_cow (ModeInfo *mi) +static void +render_cow (ModeInfo *mi, GLfloat ratio) { - cow_configuration *bp; + cow_configuration *bp = &bps[MI_SCREEN(mi)]; int wire = MI_IS_WIREFRAME(mi); int i; - Bool tex_p = False; - - MI_INIT (mi, bps); - - bp = &bps[MI_SCREEN(mi)]; - - bp->glx_context = init_GL(mi); - - reshape_cow (mi, MI_WIDTH(mi), MI_HEIGHT(mi)); - - glShadeModel(GL_SMOOTH); - - glEnable(GL_DEPTH_TEST); - glEnable(GL_NORMALIZE); - glEnable(GL_CULL_FACE); - - if (!wire) + if (! bp->dlists) + bp->dlists = (GLuint *) calloc (countof(all_objs)+1, sizeof(GLuint)); + for (i = 0; i < countof(all_objs); i++) { - GLfloat pos[4] = {0.4, 0.2, 0.4, 0.0}; -/* GLfloat amb[4] = {0.0, 0.0, 0.0, 1.0};*/ - GLfloat amb[4] = {0.2, 0.2, 0.2, 1.0}; - GLfloat dif[4] = {1.0, 1.0, 1.0, 1.0}; - GLfloat spc[4] = {1.0, 1.0, 1.0, 1.0}; - - glEnable(GL_LIGHTING); - glEnable(GL_LIGHT0); - glEnable(GL_DEPTH_TEST); - glEnable(GL_CULL_FACE); - - glLightfv(GL_LIGHT0, GL_POSITION, pos); - glLightfv(GL_LIGHT0, GL_AMBIENT, amb); - glLightfv(GL_LIGHT0, GL_DIFFUSE, dif); - glLightfv(GL_LIGHT0, GL_SPECULAR, spc); + if (bp->dlists[i]) + glDeleteLists (bp->dlists[i], 1); + bp->dlists[i] = glGenLists (1); } - bp->trackball = gltrackball_init (False); - - bp->dlists = (GLuint *) calloc (countof(all_objs)+1, sizeof(GLuint)); - for (i = 0; i < countof(all_objs); i++) - bp->dlists[i] = glGenLists (1); - - tex_p = load_texture (mi, do_texture); - if (tex_p) - glBindTexture (GL_TEXTURE_2D, bp->texture); - for (i = 0; i < countof(all_objs); i++) { GLfloat black[4] = {0, 0, 0, 1}; @@ -296,7 +269,7 @@ init_cow (ModeInfo *mi) if (i == HIDE) { GLfloat color[4] = {0.63, 0.43, 0.36, 1.00}; - if (tex_p) + if (bp->texture) { /* if we have a texture, make the base color be white. */ color[0] = color[1] = color[2] = 1.0; @@ -366,11 +339,121 @@ init_cow (ModeInfo *mi) glMaterialf (GL_FRONT_AND_BACK, GL_SHININESS, shiny); } - renderList (gll, wire); + if (ratio == 0) + renderList (gll, wire); + else + { + /* Transition between a physics cow (cow-shaped) and a + mathematical cow (spherical). + */ + struct gllist *gll2 = (struct gllist *) malloc (sizeof(*gll2)); + GLfloat *p = (GLfloat *) malloc (gll->points * 6 * sizeof(*p)); + GLfloat scale2 = 0.5 + (0.5 * (1-ratio)); + const GLfloat *pin = (GLfloat *) gll->data; + GLfloat *pout = p; + int j; + GLfloat scale = 10.46; + + memcpy (gll2, gll, sizeof(*gll2)); + gll2->next = 0; + gll2->data = p; + + for (j = 0; j < gll2->points; j++) + { + const GLfloat *ppi; + GLfloat *ppo, d; + int k; + switch (gll2->format) { + case GL_N3F_V3F: + + /* Verts transition from cow-shaped to the surface of + the enclosing sphere. */ + ppi = &pin[3]; + ppo = &pout[3]; + d = sqrt (ppi[0]*ppi[0] + ppi[1]*ppi[1] + ppi[2]*ppi[2]); + for (k = 0; k < 3; k++) + { + GLfloat min = ppi[k]; + GLfloat max = ppi[k] / d * scale; + ppo[k] = (min + ratio * (max - min)) * scale2; + } + + /* Normals are the ratio between original normals and + the radial coordinates. */ + ppi = &pin[0]; + ppo = &pout[0]; + for (k = 0; k < 3; k++) + { + GLfloat min = ppi[k]; + GLfloat max = ppi[k] / d; + ppo[k] = (min + ratio * (max - min)); + } + + pin += 6; + pout += 6; + break; + default: abort(); break; /* write me */ + } + } + + renderList (gll2, wire); + free (gll2); + free (p); + } glEndList (); } +} + + +ENTRYPOINT void +init_cow (ModeInfo *mi) +{ + cow_configuration *bp; + int wire = MI_IS_WIREFRAME(mi); + int i; + + MI_INIT (mi, bps); + + bp = &bps[MI_SCREEN(mi)]; + + bp->glx_context = init_GL(mi); + + reshape_cow (mi, MI_WIDTH(mi), MI_HEIGHT(mi)); + + glShadeModel(GL_SMOOTH); + + glEnable(GL_DEPTH_TEST); + glEnable(GL_NORMALIZE); + glEnable(GL_CULL_FACE); + + if (!wire) + { + GLfloat pos[4] = {0.4, 0.2, 0.4, 0.0}; +/* GLfloat amb[4] = {0.0, 0.0, 0.0, 1.0};*/ + GLfloat amb[4] = {0.2, 0.2, 0.2, 1.0}; + GLfloat dif[4] = {1.0, 1.0, 1.0, 1.0}; + GLfloat spc[4] = {1.0, 1.0, 1.0, 1.0}; + + glEnable(GL_LIGHTING); + glEnable(GL_LIGHT0); + glEnable(GL_DEPTH_TEST); + glEnable(GL_CULL_FACE); + + glLightfv(GL_LIGHT0, GL_POSITION, pos); + glLightfv(GL_LIGHT0, GL_AMBIENT, amb); + glLightfv(GL_LIGHT0, GL_DIFFUSE, dif); + glLightfv(GL_LIGHT0, GL_SPECULAR, spc); + } + + bp->trackball = gltrackball_init (False); + + load_texture (mi, do_texture); + + bp->ratio = 0; + render_cow (mi, bp->ratio); + bp->mode = BOUNCE; bp->nfloaters = MI_COUNT (mi); bp->floaters = (floater *) calloc (bp->nfloaters, sizeof (floater)); @@ -482,6 +565,39 @@ draw_cow (ModeInfo *mi) mi->polygon_count = 0; + if (mathematical) + { + switch (bp->mode) { + case BOUNCE: + if (bp->ratio == 0 && !(random() % 400)) + bp->mode = INFLATE; + else if (bp->ratio > 0 && !(random() % 2000)) + bp->mode = DEFLATE; + break; + case INFLATE: + bp->ratio += 0.01; + if (bp->ratio >= 1) + { + bp->ratio = 1; + bp->mode = BOUNCE; + } + break; + case DEFLATE: + bp->ratio -= 0.01; + if (bp->ratio <= 0) + { + bp->ratio = 0; + bp->mode = BOUNCE; + } + break; + default: + abort(); + } + + if (bp->ratio > 0) + render_cow (mi, bp->ratio); + } + # if 0 { floater F; |