/***************************
** crackberg; Matus Telgarsky [ catachresis@cmu.edu ] 2005
** */
#ifndef HAVE_JWXYZ
# define XK_MISCELLANY
# include <X11/keysymdef.h>
#endif
#define DEFAULTS "*delay: 20000 \n" \
"*showFPS: False \n" \
"*wireframe: False \n" \
# define release_crackberg 0
#undef countof
#define countof(x) (sizeof((x))/sizeof((*x)))
#include "xlockmore.h"
#ifdef USE_GL /* whole file */
#define DEF_NSUBDIVS "4"
#define DEF_BORING "False"
#define DEF_CRACK "True"
#define DEF_WATER "True"
#define DEF_FLAT "True"
#define DEF_COLOR "random"
#define DEF_LIT "True"
#define DEF_VISIBILITY "0.6"
#define DEF_LETTERBOX "False"
/***************************
** macros
** */
#define M_RAD7_4 0.661437827766148
#define M_SQRT3_2 0.866025403784439
#define M_PI_180 0.0174532925199433
#define M_180_PI 57.2957795130823
#define MSPEED_SCALE 1.1
#define AVE3(a,b,c) ( ((a) + (b) + (c)) / 3.0 )
#define MAX_ZDELTA 0.35
#define DISPLACE(h,d) (h+(random()/(double)RAND_MAX-0.5)*2*MAX_ZDELTA/(1<<d))
#define MEAN(x,y) ( ((x) + (y)) / 2.0 )
#define TCOORD(x,y) (cberg->heights[(cberg->epoints * (y) - ((y)-1)*(y)/2 + (x))])
#define sNCOORD(x,y,p) (cberg->norms[3 * (cberg->epoints * (y) - ((y)-1)*(y)/2 + (x)) + (p)])
#define SET_sNCOORD(x,y, down, a,b,c,d,e,f) \
sNCOORD(x,y,0) = AVE3(a-d, 0.5 * (b-e), -0.5 * (c-f)); \
sNCOORD(x,y,1) = ((down) ? -1 : +1) * AVE3(0.0, M_SQRT3_2 * (b-e), M_SQRT3_2 * (c-f)); \
sNCOORD(x,y,2) = (2*dx)
#define fNCOORD(x,y,w,p) \
(cberg->norms[3 * (2*(y)*cberg->epoints-((y)+1)*((y)+1) + 1 + 2 * ((x)-1) + (w)) + (p)])
#define SET_fNCOORDa(x,y, down, dz00,dz01) \
fNCOORD(x,y,0,0) = (down) * (dy) * (dz01); \
fNCOORD(x,y,0,1) = (down) * ((dz01) * (dx) / 2 - (dx) * (dz00)); \
fNCOORD(x,y,0,2) = (down) * (dx) * (dy)
#define SET_fNCOORDb(x,y, down, dz10,dz11) \
fNCOORD(x,y,1,0) = (down) * (dy) * (dz10); \
fNCOORD(x,y,1,1) = (down) * ((dz11) * (dx) - (dx) * (dz10) / 2); \
fNCOORD(x,y,1,2) = (down) * (dx) * (dy)
/***************************
** types
** */
typedef struct _cberg_state cberg_state;
typedef struct _Trile Trile;
typedef struct {
void (*init)(Trile *);
void (*free)(Trile *);
void (*draw)(Trile *);
void (*init_iter)(Trile *, cberg_state *);
void (*dying_iter)(Trile *, cberg_state *);
} Morph;
typedef struct {
char *id;
void (*land)(cberg_state *, double);
void (*water)(cberg_state *, double);
double bg[4];
} Color;
enum { TRILE_NEW, TRILE_INIT, TRILE_STABLE, TRILE_DYING, TRILE_DELETE };
struct _Trile {
int x,y; /*center coords; points up if (x+y)%2 == 0, else down*/
short state;
short visible;
double *l,*r,*v; /*only edges need saving*/
GLuint call_list;
void *morph_data;
const Morph *morph;
struct _Trile *left, *right, *parent; /* for bst, NOT spatial */
struct _Trile *next_free, *next0; /* for memory allocation */
};
enum { MOTION_AUTO = 0, MOTION_MANUAL = 1, MOTION_LROT= 2, MOTION_RROT = 4,
MOTION_FORW = 8, MOTION_BACK = 16, MOTION_DEC = 32, MOTION_INC = 64,
MOTION_LEFT = 128, MOTION_RIGHT = 256 };
struct _cberg_state {
GLXContext *glx_context;
Trile *trile_head;
double x,y,z, yaw,roll,pitch, dx,dy,dz, dyaw,droll,dpitch, elapsed;
double prev_frame;
int motion_state;
double mspeed;
double fovy, aspect, zNear, zFar;
const Color *color;
int count;
unsigned int epoints, /*number of points to one edge*/
tpoints, /*number points total*/
ntris, /*number triangles per trile*/
tnorms; /*number of normals*/
double *heights, *norms;
Trile *free_head; /* for trile_[alloc|free] */
Trile *all_triles;
double draw_elapsed;
double dx0;
double vs0r,vs0g,vs0b, vs1r, vs1g, vs1b,
vf0r,vf0g,vf0b, vf1r, vf1g, vf1b;
Bool button_down_p;
int mouse_x, mouse_y;
struct timeval paused;
};
/***************************
** globals
** */
static unsigned int nsubdivs;
static Bool crack, boring, do_water, flat, lit, letterbox;
static float visibility;
static char *color;
static cberg_state *cbergs = NULL;
static XrmOptionDescRec opts[] = {
{"-nsubdivs", ".nsubdivs", XrmoptionSepArg, 0},
{"-boring", ".boring", XrmoptionNoArg, "True"},
{"-crack", ".crack", XrmoptionNoArg, "True"},
{"-no-crack", ".crack", XrmoptionNoArg, "False"},
{"-water", ".water", XrmoptionNoArg, "True"},
{"-no-water", ".water", XrmoptionNoArg, "False"},
{"-flat", ".flat", XrmoptionNoArg, "True"},
{"-no-flat", ".flat", XrmoptionNoArg, "False"},
{"-color", ".color", XrmoptionSepArg, 0},
{"-lit", ".lit", XrmoptionNoArg, "True"},
{"-no-lit", ".lit", XrmoptionNoArg, "False"},
{"-visibility", ".visibility", XrmoptionSepArg, 0},
{"-letterbox", ".letterbox", XrmoptionNoArg, "True"}
};
static argtype vars[] = {
{&nsubdivs, "nsubdivs", "nsubdivs", DEF_NSUBDIVS, t_Int},
{&boring, "boring", "boring", DEF_BORING, t_Bool},
{&crack, "crack", "crack", DEF_CRACK, t_Bool},
{&do_water, "water", "water", DEF_WATER, t_Bool},
{&flat, "flat", "flat", DEF_FLAT, t_Bool},
{&color, "color", "color", DEF_COLOR, t_String},
{&lit, "lit", "lit", DEF_LIT, t_Bool},
{&visibility, "visibility", "visibility", DEF_VISIBILITY, t_Float},
{&letterbox, "letterbox", "letterbox", DEF_LETTERBOX, t_Bool}
};
ENTRYPOINT ModeSpecOpt crackberg_opts = {countof(opts), opts, countof(vars), vars, NULL};
/***************************
** Trile functions.
** first come all are regular trile functions
** */
/* forward decls for trile_new */
static Trile *triles_find(Trile *tr, int x, int y);
static Trile *trile_alloc(cberg_state *cberg);
static const Morph *select_morph(void);
static const Color *select_color(cberg_state *);
static void trile_calc_sides(cberg_state *cberg,
Trile *new, int x, int y, Trile *root)
{
unsigned int i,j,k;
int dv = ( (x + y) % 2 ? +1 : -1); /* we are pointing down or up*/
Trile *l, *r, *v; /* v_ertical */
if (root) {
l = triles_find(root, x-1, y);
r = triles_find(root, x+1, y);
v = triles_find(root, x,y+dv);
} else
l = r = v = NULL;
if (v) {
for (i = 0; i != cberg->epoints; ++i)
new->v[i] = v->v[i];
} else {
if (l) new->v[0] = l->l[0];
else if (!root) new->v[0] = DISPLACE(0,0);
else {
Trile *tr; /* all of these tests needed.. */
if ( (tr = triles_find(root, x-1, y + dv)) )
new->v[0] = tr->l[0];
else if ( (tr = triles_find(root, x-2, y)) )
new->v[0] = tr->r[0];
else if ( (tr = triles_find(root, x-2, y + dv)) )
new->v[0] = tr->r[0];
else
new->v[0] = DISPLACE(0,0);
}
if (r) new->v[cberg->epoints-1] = r->l[0];
else if (!root) new->v[cberg->epoints-1] = DISPLACE(0,0);
else {
Trile *tr;
if ( (tr = triles_find(root, x+1, y + dv)) )
new->v[cberg->epoints-1] = tr->l[0];
else if ( (tr = triles_find(root, x+2, y)) )
new->v[cberg->epoints-1] = tr->v[0];
else if ( (tr = triles_find(root, x+2, y + dv)) )
new->v[cberg->epoints-1] = tr->v[0];
else
new->v[cberg->epoints-1] = DISPLACE(0,0);
}
for (i = ((1 << nsubdivs) >> 1), k =1; i; i >>= 1, ++k)
for (j = i; j < cberg->epoints; j += i * 2)
new->v[j] = DISPLACE(MEAN(new->v[j-i], new->v[j+i]), k);
}
if (l) {
for (i = 0; i != cberg->epoints; ++i)
new->l[i] = l->r[i];
} else {
if (r) new->l[0] = r->v[0];
else if (!root) new->l[0] = DISPLACE(0,0);
else {
Trile *tr;
if ( (tr = triles_find(root, x-1, y-dv)) )
new->l[0] = tr->r[0];
else if ( (tr = triles_find(root, x+1, y-dv)) )
new->l[0] = tr->v[0];
else if ( (tr = triles_find(root, x, y-dv)) )
new->l[0] = tr->l[0];
else
new->l[0] = DISPLACE(0,0);
}
new->l[cberg->epoints - 1] = new->v[0];
for (i = ((1 << nsubdivs) >> 1), k =1; i; i >>= 1, ++k)
for (j = i; j < cberg->epoints; j += i * 2)
new->l[j] = DISPLACE(MEAN(new->l[j-i], new->l[j+i]), k);
}
if (r) {
for (i = 0; i != cberg->epoints; ++i)
new->r[i] = r->l[i];
} else {
new->r[0] = new->v[cberg->epoints - 1];
new->r[cberg->epoints - 1] = new->l[0];
for (i = ((1 << nsubdivs) >> 1), k =1; i; i >>= 1, ++k)
for (j = i; j < cberg->epoints; j += i * 2)
new->r[j] = DISPLACE(MEAN(new->r[j-i], new->r[j+i]), k);
}
}
static void trile_calc_heights(cberg_state *cberg, Trile *new)
{
unsigned int i, j, k, h;
for (i = 0; i < cberg->epoints - 1; ++i) { /* copy in sides */
TCOORD(i,0) = new->v[i];
TCOORD(cberg->epoints - 1 - i, i) = new->r[i];
TCOORD(0, cberg->epoints - 1 - i) = new->l[i];
}
for (i = ((1 << nsubdivs) >> 2), k =1; i; i >>= 1, ++k)
for (j = 1; j < (1 << k); ++j)
for (h = 1; h <= (1<<k) - j; ++h) {
TCOORD( i*(2*h - 1), i*(2*j - 1) ) = /*rights*/
DISPLACE(MEAN(TCOORD( i*(2*h - 2), i*(2*j + 0) ),
TCOORD( i*(2*h + 0), i*(2*j - 2) )), k);
TCOORD( i*(2*h + 0), i*(2*j - 1) ) = /*lefts*/
DISPLACE(MEAN(TCOORD( i*(2*h + 0), i*(2*j - 2) ),
TCOORD( i*(2*h + 0), i*(2*j + 0) )), k);
TCOORD( i*(2*h - 1), i*(2*j + 0) ) = /*verts*/
DISPLACE(MEAN(TCOORD( i*(2*h - 2), i*(2*j + 0) ),
TCOORD( i*(2*h + 0), i*(2*j + 0) )), k);
}
}
static void trile_calc_flat_norms(cberg_state *cberg, Trile *new)
{
unsigned int x, y;
int down = (((new->x + new->y) % 2) ? -1 : +1);
double dz00,dz01,dz10,dz11, a,b,c,d;
double dy = down * M_SQRT3_2 / (1 << nsubdivs);
double dx = cberg->dx0;
for (y = 0; y < cberg->epoints - 1; ++y) {
a = TCOORD(0,y);
b = TCOORD(0,y+1);
for (x = 1; x < cberg->epoints - 1 - y; ++x) {
c = TCOORD(x,y);
d = TCOORD(x,y+1);
dz00 = b-c;
dz01 = a-c;
dz10 = b-d;
dz11 = c-d;
SET_fNCOORDa(x,y, down, dz00,dz01);
SET_fNCOORDb(x,y, down, dz10,dz11);
a = c;
b = d;
}
c = TCOORD(x,y);
dz00 = b-c;
dz01 = a-c;
SET_fNCOORDa(x,y, down, dz00, dz01);
}
}
static void trile_calc_smooth_norms(cberg_state *cberg, Trile *new)
{
unsigned int i,j, down = (new->x + new->y) % 2;
double prev, cur, next;
double dx = cberg->dx0;
/** corners -- assume level (bah) **/
cur = TCOORD(0,0);
SET_sNCOORD(0,0, down,
cur,cur,TCOORD(0,1),TCOORD(1,0),cur,cur);
cur = TCOORD(cberg->epoints-1,0);
SET_sNCOORD(cberg->epoints-1,0, down,
TCOORD(cberg->epoints-2,0),TCOORD(cberg->epoints-2,1),cur,cur,cur,cur);
cur = TCOORD(0,cberg->epoints-1);
SET_sNCOORD(0,cberg->epoints-1, down,
cur,cur,cur,cur,TCOORD(1,cberg->epoints-2),TCOORD(0,cberg->epoints-2));
/** sides **/
/* vert */
prev = TCOORD(0,0);
cur = TCOORD(1,0);
for (i = 1; i < cberg->epoints - 1; ++i) {
next = TCOORD(i+1,0);
SET_sNCOORD(i,0, down, prev,TCOORD(i-1,1),TCOORD(i,1), next,cur,cur);
prev = cur;
cur = next;
}
/* right */
prev = TCOORD(cberg->epoints-1,0);
cur = TCOORD(cberg->epoints-2,0);
for (i = 1; i < cberg->epoints - 1; ++i) {
next = TCOORD(cberg->epoints-i-2,i+1);
SET_sNCOORD(cberg->epoints-i-1,i, down, TCOORD(cberg->epoints-i-2,i),next,cur,
cur,prev,TCOORD(cberg->epoints-i-1,i-1));
prev = cur;
cur = next;
}
/* left */
prev = TCOORD(0,0);
cur = TCOORD(0,1);
for (i = 1; i < cberg->epoints - 1; ++i) {
next = TCOORD(0,i+1);
SET_sNCOORD(0,i, down, cur,cur,next,TCOORD(1,i),TCOORD(1,i-1),prev);
prev = cur;
cur = next;
}
/** fill in **/
for (i = 1; i < cberg->epoints - 2; ++i) {
prev = TCOORD(0,i);
cur = TCOORD(1,i);
for (j = 1; j < cberg->epoints - i - 1; ++j) {
next = TCOORD(j+1,i);
SET_sNCOORD(j,i, down, prev,TCOORD(j-1,i+1),TCOORD(j,i+1),
next,TCOORD(j+1,i-1),TCOORD(j,i-1));
prev = cur;
cur = next;
}
}
}
static inline void trile_light(cberg_state *cberg,
unsigned int x, unsigned int y,
unsigned int which)
{
if (flat) {
if (x) {
glNormal3d(fNCOORD(x,y,which,0),
fNCOORD(x,y,which,1),
fNCOORD(x,y,which,2));
} else { /* I get mesa errors and bizarre glitches without this!! */
glNormal3d(fNCOORD(1,y,0,0),
fNCOORD(1,y,0,1),
fNCOORD(1,y,0,2));
}
} else {
glNormal3d(sNCOORD(x,y+which,0),
sNCOORD(x,y+which,1),
sNCOORD(x,y+which,2));
}
}
static inline void trile_draw_vertex(cberg_state *cberg, unsigned int ix,
unsigned int iy, unsigned int which, double x,double y,
double zcur, double z1, double z2)
{
glColor3d(0.0, 0.0, 0.0); /* don't ask. my card breaks otherwise. */
if (do_water && zcur <= 0.0) {
cberg->color->water(cberg, zcur); /* XXX use average-of-3 for color when flat?*/
if (lit) glNormal3d(0.0,0.0,1.0);
glVertex3d(x, y, 0.0);
} else {
cberg->color->land(cberg, zcur);
if (lit) trile_light(cberg,ix,iy,which);
glVertex3d(x, y, zcur);
}
}
static void trile_render(cberg_state *cberg, Trile *new)
{
double cornerx = 0.5 * new->x - 0.5, cornery;
double dy = M_SQRT3_2 / (1 << nsubdivs);
double z0,z1,z2;
int x,y;
new->call_list = glGenLists(1);
glNewList(new->call_list, GL_COMPILE);
if ((new->x + new->y) % 2) { /*point down*/
cornery = (new->y + 0.5)*M_SQRT3_2;
glFrontFace(GL_CW);
dy = -dy;
} else
cornery = (new->y - 0.5) * M_SQRT3_2;
for (y = 0; y < cberg->epoints - 1; ++y) {
double dx = cberg->dx0;
glBegin(GL_TRIANGLE_STRIP);
/* first three points all part of the same triangle.. */
z0 = TCOORD(0,y);
z1 = TCOORD(0,y+1);
z2 = TCOORD(1,y);
trile_draw_vertex(cberg, 0,y,0,
cornerx,cornery, z0, z1, z2);
trile_draw_vertex(cberg, 0,y,1,
cornerx+0.5*dx,cornery+dy, z1, z0, z2);
for (x = 1; x < cberg->epoints - 1 - y; ++x) {
trile_draw_vertex(cberg, x,y,0,
cornerx+x*dx,cornery, z2, z1, z0);
z0 = TCOORD(x, y+1);
trile_draw_vertex(cberg, x,y,1,
cornerx+(x+0.5)*dx,cornery+dy, z0, z2, z1);
z1 = z0;
z0 = z2;
z2 = TCOORD(x+1,y);
}
trile_draw_vertex(cberg, x,y,0,
cornerx + x*dx, cornery, z2, z1, z0);
glEnd();
cornerx += dx/2;
cornery += dy;
}
if ((new->x + new->y) % 2) /*point down*/
glFrontFace(GL_CCW);
glEndList();
}
static Trile *trile_new(cberg_state *cberg, int x,int y,Trile *parent,Trile *root)
{
Trile *new;
new = trile_alloc(cberg);
new->x = x;
new->y = y;
new->state = TRILE_NEW;
new->parent = parent;
new->left = new->right = NULL;
new->visible = 1;
new->morph = select_morph();
new->morph->init(new);
trile_calc_sides(cberg, new, x, y, root);
trile_calc_heights(cberg, new);
if (lit) {
if (flat) trile_calc_flat_norms(cberg, new);
else trile_calc_smooth_norms(cberg, new);
}
trile_render(cberg, new);
return new;
}
static Trile *trile_alloc(cberg_state *cberg)
{
Trile *new;
if (cberg->free_head) {
new = cberg->free_head;
cberg->free_head = cberg->free_head->next_free;
} else {
++cberg->count;
if (!(new = calloc(1, sizeof(Trile)))
|| !(new->l = (double *) calloc(sizeof(double), cberg->epoints * 3))) {
perror(progname);
exit(1);
}
new->r = new->l + cberg->epoints;
new->v = new->r + cberg->epoints;
new->next0 = cberg->all_triles;
cberg->all_triles = new;
#ifdef DEBUG
printf("needed to alloc; [%d]\n", cberg->count);
#endif
}
return new;
}
static void trile_free(cberg_state *cberg, Trile *tr)
{
glDeleteLists(tr->call_list, 1);
tr->morph->free(tr);
tr->next_free = cberg->free_head;
cberg->free_head = tr;
}
static void trile_draw_vanilla(Trile *tr)
{ glCallList(tr->call_list); }
static void trile_draw(Trile *tr, void *ignore)
{
if (tr->state == TRILE_STABLE)
trile_draw_vanilla(tr);
else
tr->morph->draw(tr);
}
/***************************
** Trile morph functions.
** select function at bottom (forward decls sucls)
** */
/*** first the basic growing morph */
static void grow_init(Trile *tr)
{
if (!tr->morph_data)
tr->morph_data = (void *) malloc(sizeof(double));
*((double *)tr->morph_data) = 0.02; /* not 0; avoid normals crapping */
}
static void grow_free(Trile *tr)
{
if (tr->morph_data) free(tr->morph_data);
tr->morph_data = 0;
}
static void grow_draw(Trile *tr)
{
glPushMatrix();
glScaled(1.0,1.0, *((double *)tr->morph_data));
trile_draw_vanilla(tr);
glPopMatrix();
}
static void grow_init_iter(Trile *tr, cberg_state *cberg)
{
*((double *)(tr->morph_data)) = *((double *)tr->morph_data) + cberg->elapsed;
if (*((double *)tr->morph_data) >= 1.0)
tr->state = TRILE_STABLE;
}
static void grow_dying_iter(Trile *tr, cberg_state *cberg)
{
*((double *)tr->morph_data) = *((double *)tr->morph_data) - cberg->elapsed;
if (*((double *)tr->morph_data) <= 0.02) /* XXX avoid fast del/cons? */
tr->state = TRILE_DELETE;
}
/**** falling morph ****/
static void fall_init(Trile *tr)
{
if (!tr->morph_data)
tr->morph_data = (void *) malloc(sizeof(double));
*((double *)tr->morph_data) = 0.0;
}
static void fall_free(Trile *tr)
{
if (tr->morph_data) free(tr->morph_data);
tr->morph_data = 0;
}
static void fall_draw(Trile *tr)
{
glPushMatrix();
glTranslated(0.0,0.0,(0.5 - *((double *)tr->morph_data)) * 8);
trile_draw_vanilla(tr);
glPopMatrix();
}
static void fall_init_iter(Trile *tr, cberg_state *cberg)
{
*((double *)(tr->morph_data)) = *((double *)tr->morph_data) + cberg->elapsed;
if (*((double *)tr->morph_data) >= 0.5)
tr->state = TRILE_STABLE;
}
static void fall_dying_iter(Trile *tr, cberg_state *cberg)
{
*((double *)tr->morph_data) = *((double *)tr->morph_data) - cberg->elapsed;
if (*((double *)tr->morph_data) <= 0.0) /* XXX avoid fast del/cons? */
tr->state = TRILE_DELETE;
}
/**** yeast morph ****/
static void yeast_init(Trile *tr)
{
if (!tr->morph_data)
tr->morph_data = (void *) malloc(sizeof(double));
*((double *)tr->morph_data) = 0.02;
}
static void yeast_free(Trile *tr)
{
if (tr->morph_data) free(tr->morph_data);
tr->morph_data = 0;
}
static void yeast_draw(Trile *tr)
{
double x = tr->x * 0.5,
y = tr->y * M_SQRT3_2,
z = *((double *)tr->morph_data);
glPushMatrix();
glTranslated(x, y, 0);
glRotated(z*360, 0,0,1);
glScaled(z,z,z);
glTranslated(-x, -y, 0);
trile_draw_vanilla(tr);
glPopMatrix();
}
static void yeast_init_iter(Trile *tr, cberg_state *cberg)
{
*((double *)(tr->morph_data)) = *((double *)tr->morph_data) + cberg->elapsed;
if (*((double *)tr->morph_data) >= 1.0)
tr->state = TRILE_STABLE;
}
static void yeast_dying_iter(Trile *tr, cberg_state *cberg)
{
*((double *)tr->morph_data) = *((double *)tr->morph_data) - cberg->elapsed;
if (*((double *)tr->morph_data) <= 0.02) /* XXX avoid fast del/cons? */
tr->state = TRILE_DELETE;
}
/**** identity morph ****/
static void identity_init(Trile *tr)
{ tr->state = TRILE_STABLE; }
static void identity_free(Trile *tr)
{}
static void identity_draw(Trile *tr)
{ trile_draw_vanilla(tr); }
static void identity_init_iter(Trile *tr, cberg_state *cberg)
{}
static void identity_dying_iter(Trile *tr, cberg_state *cberg)
{ tr->state = TRILE_DELETE; }
/** now to handle selection **/
static const Morph morphs[] = {
{grow_init, grow_free, grow_draw, grow_init_iter, grow_dying_iter},
{fall_init, fall_free, fall_draw, fall_init_iter, fall_dying_iter},
{yeast_init, yeast_free, yeast_draw, yeast_init_iter, yeast_dying_iter},
{identity_init, /*always put identity last to skip it..*/
identity_free, identity_draw, identity_init_iter, identity_dying_iter}
};
static const Morph *select_morph()
{
int nmorphs = countof(morphs);
if (crack)
return &morphs[random() % (nmorphs-1)];
else if (boring)
return &morphs[nmorphs-1];
else
return morphs;
}
/***************************
** Trile superstructure functions.
** */
static void triles_set_visible(cberg_state *cberg, Trile **root, int x, int y)
{
Trile *parent = NULL,
*iter = *root;
int goleft=0;
while (iter != NULL) {
parent = iter;
goleft = (iter->x > x || (iter->x == x && iter->y > y));
if (goleft)
iter = iter->left;
else if (iter->x == x && iter->y == y) {
iter->visible = 1;
return;
} else
iter = iter->right;
}
if (parent == NULL)
*root = trile_new(cberg, x,y, NULL, NULL);
else if (goleft)
parent->left = trile_new(cberg, x,y, parent, *root);
else
parent->right = trile_new(cberg, x,y, parent, *root);
}
static unsigned int triles_foreach(Trile *root, void (*f)(Trile *, void *),
void *data)
{
if (root == NULL)
return 0;
f(root, data);
return 1 + triles_foreach(root->left, f, data)
+ triles_foreach(root->right, f, data);
}
static void triles_update_state(Trile **root, cberg_state *cberg)
{
int process_current = 1;
if (*root == NULL)
return;
while (process_current) {
if ( (*root)->visible ) {
if ( (*root)->state == TRILE_INIT )
(*root)->morph->init_iter(*root, cberg);
else if ( (*root)->state == TRILE_DYING ) {
(*root)->state = TRILE_INIT;
(*root)->morph->init_iter(*root, cberg);
} else if ( (*root)->state == TRILE_NEW )
(*root)->state = TRILE_INIT;
(*root)->visible = 0;
} else {
if ( (*root)->state == TRILE_STABLE )
(*root)->state = TRILE_DYING;
else if ( (*root)->state == TRILE_INIT ) {
(*root)->state = TRILE_DYING;
(*root)->morph->dying_iter(*root, cberg);
} else if ( (*root)->state == TRILE_DYING )
(*root)->morph->dying_iter(*root, cberg);
}
if ( (*root)->state == TRILE_DELETE ) {
Trile *splice_me;
process_current = 1;
if ((*root)->left == NULL) {
splice_me = (*root)->right;
if (splice_me)
splice_me->parent = (*root)->parent;
else
process_current = 0;
} else if ((*root)->right == NULL) {
splice_me = (*root)->left;
splice_me->parent = (*root)->parent;
} else {
Trile *tmp;
for (splice_me = (*root)->right; splice_me->left != NULL; )
splice_me = splice_me->left;
tmp = splice_me->right;
if (tmp) tmp->parent = splice_me->parent;
if (splice_me == splice_me->parent->left)
splice_me->parent->left = tmp;
else
splice_me->parent->right = tmp;
splice_me->parent = (*root)->parent;
splice_me->left = (*root)->left;
(*root)->left->parent = splice_me;
splice_me->right = (*root)->right;
if ((*root)->right)
(*root)->right->parent = splice_me;
}
trile_free(cberg, *root);
*root = splice_me;
} else
process_current = 0;
}
if (*root) {
triles_update_state(&((*root)->left), cberg);
triles_update_state(&((*root)->right), cberg);
}
}
static Trile *triles_find(Trile *tr, int x, int y)
{
while (tr && !(tr->x == x && tr->y == y))
if (x < tr->x || (x == tr->x && y < tr->y))
tr = tr->left;
else
tr = tr->right;
return tr;
}
/***************************
** Trile superstructure visibility functions.
** strategy fine, implementation lazy&retarded =/
** */
#ifdef DEBUG
static double x_shit, y_shit;
#endif
static void calc_points(cberg_state *cberg, double *x1,double *y1,
double *x2,double *y2, double *x3,double *y3, double *x4,double *y4)
{
double zNear, x_nearcenter, y_nearcenter, nhalfwidth, x_center, y_center;
/* could cache these.. bahhhhhhhhhhhhhh */
double halfheight = tan(cberg->fovy / 2 * M_PI_180) * cberg->zNear;
double fovx_2 = atan(halfheight * cberg->aspect / cberg->zNear) * M_180_PI;
double zFar = cberg->zFar + M_RAD7_4;
double fhalfwidth = zFar * tan(fovx_2 * M_PI_180)
+ M_RAD7_4 / cos(fovx_2 * M_PI_180);
double x_farcenter = cberg->x + zFar * cos(cberg->yaw * M_PI_180);
double y_farcenter = cberg->y + zFar * sin(cberg->yaw * M_PI_180);
*x1 = x_farcenter + fhalfwidth * cos((cberg->yaw - 90) * M_PI_180);
*y1 = y_farcenter + fhalfwidth * sin((cberg->yaw - 90) * M_PI_180);
*x2 = x_farcenter - fhalfwidth * cos((cberg->yaw - 90) * M_PI_180);
*y2 = y_farcenter - fhalfwidth * sin((cberg->yaw - 90) * M_PI_180);
#ifdef DEBUG
printf("pos (%.3f,%.3f) @ %.3f || fovx: %f || fovy: %f\n",
cberg->x, cberg->y, cberg->yaw, fovx_2 * 2, cberg->fovy);
printf("\tfarcenter: (%.3f,%.3f) || fhalfwidth: %.3f \n"
"\tp1: (%.3f,%.3f) || p2: (%.3f,%.3f)\n",
x_farcenter, y_farcenter, fhalfwidth, *x1, *y1, *x2, *y2);
#endif
if (cberg->z - halfheight <= 0) /* near view plane hits xy */
zNear = cberg->zNear - M_RAD7_4;
else /* use bottom of frustum */
zNear = cberg->z / tan(cberg->fovy / 2 * M_PI_180) - M_RAD7_4;
nhalfwidth = zNear * tan(fovx_2 * M_PI_180)
+ M_RAD7_4 / cos(fovx_2 * M_PI_180);
x_nearcenter = cberg->x + zNear * cos(cberg->yaw * M_PI_180);
y_nearcenter = cberg->y + zNear * sin(cberg->yaw * M_PI_180);
*x3 = x_nearcenter - nhalfwidth * cos((cberg->yaw - 90) * M_PI_180);
*y3 = y_nearcenter - nhalfwidth * sin((cberg->yaw - 90) * M_PI_180);
*x4 = x_nearcenter + nhalfwidth * cos((cberg->yaw - 90) * M_PI_180);
*y4 = y_nearcenter + nhalfwidth * sin((cberg->yaw - 90) * M_PI_180);
#ifdef DEBUG
printf("\tnearcenter: (%.3f,%.3f) || nhalfwidth: %.3f\n"
"\tp3: (%.3f,%.3f) || p4: (%.3f,%.3f)\n",
x_nearcenter, y_nearcenter, nhalfwidth, *x3, *y3, *x4, *y4);
#endif
/* center can be average or the intersection of diagonals.. */
#if 0
{
double c = nhalfwidth * (zFar -zNear) / (fhalfwidth + nhalfwidth);
x_center = x_nearcenter + c * cos(cberg->yaw * M_PI_180);
y_center = y_nearcenter + c * sin(cberg->yaw * M_PI_180);
}
#else
x_center = (x_nearcenter + x_farcenter) / 2;
y_center = (y_nearcenter + y_farcenter) / 2;
#endif
#ifdef DEBUG
x_shit = x_center;
y_shit = y_center;
#endif
#define VSCALE(p) *x##p = visibility * *x##p + (1-visibility) * x_center; \
*y##p = visibility * *y##p + (1-visibility) * y_center
VSCALE(1);
VSCALE(2);
VSCALE(3);
VSCALE(4);
#undef VSCALE
}
/* this is pretty stupid.. */
static inline void minmax4(double a, double b, double c, double d,
double *min, double *max)
{
*min = *max = a;
if (b > *max) *max = b;
else if (b < *min) *min = b;
if (c > *max) *max = c;
else if (c < *min) *min = c;
if (d > *max) *max = d;
else if (d < *min) *min = d;
}
typedef struct {
double min, max, start, dx;
} LS;
#define check_line(a, b) \
if (fabs(y##a-y##b) > 0.001) { \
ls[count].dx = (x##b-x##a)/(y##b-y##a); \
if (y##b > y##a) { \
ls[count].start = x##a; \
ls[count].min = y##a; \
ls[count].max = y##b; \
} else { \
ls[count].start = x##b; \
ls[count].min = y##b; \
ls[count].max = y##a; \
} \
++count; \
}
static unsigned int build_ls(cberg_state *cberg,
double x1, double y1, double x2, double y2,
double x3, double y3, double x4, double y4, LS *ls,
double *trough, double *peak)
{
unsigned int count = 0;
check_line(1, 2);
check_line(2, 3);
check_line(3, 4);
check_line(4, 1);
minmax4(y1, y2, y3, y4, trough, peak);
return count;
}
#undef check_line
/*needs bullshit to avoid double counts on corners.*/
static void find_bounds(double y, double *left, double *right, LS *ls,
unsigned int nls)
{
double x;
unsigned int i, set = 0;
for (i = 0; i != nls; ++i)
if (ls[i].min <= y && ls[i].max >= y) {
x = (y - ls[i].min) * ls[i].dx + ls[i].start;
if (!set) {
*left = x;
++set;
} else if (fabs(x - *left) > 0.001) {
if (*left < x)
*right = x;
else {
*right = *left;
*left = x;
}
return;
}
}
/* just in case we somehow blew up */
*left = 3.0;
*right = -3.0;
}
static void mark_visible(cberg_state *cberg)
{
double trough, peak, yval, left=0, right=0;
double x1,y1, x2,y2, x3,y3, x4,y4;
int start, stop, x, y;
LS ls[4];
unsigned int nls;
calc_points(cberg, &x1,&y1, &x2,&y2, &x3,&y3, &x4,&y4);
nls = build_ls(cberg, x1,y1, x2,y2, x3,y3, x4,y4, ls, &trough, &peak);
start = (int) ceil(trough / M_SQRT3_2);
stop = (int) floor(peak / M_SQRT3_2);
for (y = start; y <= stop; ++y) {
yval = y * M_SQRT3_2;
find_bounds(yval, &left, &right, ls, nls);
for (x = (int) ceil(left*2-1); x <= (int) floor(right*2); ++x)
triles_set_visible(cberg, &(cberg->trile_head), x, y);
}
}
/***************************
** color schemes
** */
static void plain_land(cberg_state *cberg, double z)
{ glColor3f(pow((z/0.35),4), z/0.35, pow((z/0.35),4)); }
static void plain_water(cberg_state *cberg, double z)
{ glColor3f(0.0, (z+0.35)*1.6, 0.8); }
static void ice_land(cberg_state *cberg, double z)
{ glColor3f((0.35 - z)/0.35, (0.35 - z)/0.35, 1.0); }
static void ice_water(cberg_state *cberg, double z)
{ glColor3f(0.0, (z+0.35)*1.6, 0.8); }
static void magma_land(cberg_state *cberg, double z)
{ glColor3f(z/0.35, z/0.2,0); }
static void magma_lava(cberg_state *cberg, double z)
{ glColor3f((z+0.35)*1.6, (z+0.35), 0.0); }
static void vomit_solid(cberg_state *cberg, double z)
{
double norm = fabs(z) / 0.35;
glColor3f(
(1-norm) * cberg->vs0r + norm * cberg->vs1r,
(1-norm) * cberg->vs0g + norm * cberg->vs1g,
(1-norm) * cberg->vs0b + norm * cberg->vs1b
);
}
static void vomit_fluid(cberg_state *cberg, double z)
{
double norm = z / -0.35;
glColor3f(
(1-norm) * cberg->vf0r + norm * cberg->vf1r,
(1-norm) * cberg->vf0g + norm * cberg->vf1g,
(1-norm) * cberg->vf0b + norm * cberg->vf1b
);
}
static const Color colors[] = {
{"plain", plain_land, plain_water, {0.0, 0.0, 0.0, 1.0}},
{"ice", ice_land, ice_water, {0.0, 0.0, 0.0, 1.0}},
{"magma", magma_land, magma_lava, {0.3, 0.3, 0.0, 1.0}},
{"vomit", vomit_solid, vomit_fluid, {0.3, 0.3, 0.0, 1.0}}, /* no error! */
};
static const Color *select_color(cberg_state *cberg)
{
unsigned int ncolors = countof(colors);
int idx = -1;
if ( ! strcmp(color, "random") )
idx = random() % ncolors;
else {
unsigned int i;
for (i = 0; i != ncolors; ++i)
if ( ! strcmp(colors[i].id, color) ) {
idx = i;
break;
}
if (idx == -1) {
printf("invalid color scheme selected; valid choices are:\n");
for (i = 0; i != ncolors; ++i)
printf("\t%s\n", colors[i].id);
printf("\t%s\n", "random");
idx = 0;
}
}
if ( ! strcmp(colors[idx].id, "vomit") ) { /* need to create it (ghetto) */
cberg->vs0r = random()/(double)RAND_MAX;
cberg->vs0g = random()/(double)RAND_MAX;
cberg->vs0b = random()/(double)RAND_MAX;
cberg->vs1r = random()/(double)RAND_MAX;
cberg->vs1g = random()/(double)RAND_MAX;
cberg->vs1b = random()/(double)RAND_MAX;
cberg->vf0r = random()/(double)RAND_MAX;
cberg->vf0g = random()/(double)RAND_MAX;
cberg->vf0b = random()/(double)RAND_MAX;
cberg->vf1r = random()/(double)RAND_MAX;
cberg->vf1g = random()/(double)RAND_MAX;
cberg->vf1b = random()/(double)RAND_MAX;
glClearColor(random()/(double)RAND_MAX,
random()/(double)RAND_MAX,
random()/(double)RAND_MAX,
1.0);
} else {
glClearColor(colors[idx].bg[0],
colors[idx].bg[1],
colors[idx].bg[2],
colors[idx].bg[3]);
}
return colors + idx;
}
/***************************
** misc helper functions
** */
/* simple one for now.. */
static inline double drunken_rando(double cur_val, double max, double width)
{
double r = random() / (double) RAND_MAX * 2;
if (cur_val > 0)
if (r >= 1)
return cur_val + (r-1) * width * (1-cur_val/max);
else
return cur_val - r * width;
else
if (r >= 1)
return cur_val - (r-1) * width * (1+cur_val/max);
else
return cur_val + r * width;
}
/***************************
** core crackberg routines
** */
ENTRYPOINT void reshape_crackberg (ModeInfo *mi, int w, int h);
ENTRYPOINT void init_crackberg (ModeInfo *mi)
{
cberg_state *cberg;
nsubdivs %= 16; /* just in case.. */
MI_INIT(mi, cbergs);
if (visibility > 1.0 || visibility < 0.2) {
printf("visibility must be in range [0.2 .. 1.0]\n");
visibility = 1.0;
}
cberg = &cbergs[MI_SCREEN(mi)];
cberg->epoints = 1 + (1 << nsubdivs);
cberg->tpoints = cberg->epoints * (cberg->epoints + 1) / 2;
cberg->ntris = (1 << (nsubdivs << 1));
cberg->tnorms = ( (flat) ? cberg->ntris : cberg->tpoints);
cberg->dx0 = 1.0 / (1 << nsubdivs);
cberg->heights = malloc(cberg->tpoints * sizeof(double));
cberg->norms = malloc(3 * cberg->tnorms * sizeof(double));
cberg->glx_context = init_GL(mi);
cberg->motion_state = MOTION_AUTO;
cberg->mspeed = 1.0;
cberg->z = 0.5;
cberg->fovy = 60.0;
cberg->zNear = 0.5;
cberg->zFar = 5.0;
cberg->draw_elapsed = 1.0;
glEnable(GL_DEPTH_TEST);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glShadeModel((flat) ? GL_FLAT : GL_SMOOTH);
# ifndef HAVE_JWZGLES /* #### glPolygonMode other than GL_FILL unimplemented */
glPolygonMode(GL_FRONT_AND_BACK, (MI_IS_WIREFRAME(mi)) ? GL_LINE : GL_FILL);
# endif
if (lit) {
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_COLOR_MATERIAL);
glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE);
glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
glEnable(GL_NORMALIZE);
glEnable(GL_RESCALE_NORMAL);
}
cberg->color = select_color(cberg);
reshape_crackberg(mi, MI_WIDTH(mi), MI_HEIGHT(mi));
}
ENTRYPOINT void reshape_crackberg (ModeInfo *mi, int w, int h)
{
int h2;
cberg_state *cberg = &cbergs[MI_SCREEN(mi)];
if (letterbox && (h2 = w * 9 / 16) < h) {
glViewport(0, (h-h2)/2, w, h2);
cberg->aspect = w/(double)h2;
} else {
glViewport (0, 0, w, h);
cberg->aspect = w/(double)h;
}
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(cberg->fovy, cberg->aspect, cberg->zNear, cberg->zFar);
glMatrixMode(GL_MODELVIEW);
}
ENTRYPOINT Bool crackberg_handle_event (ModeInfo *mi, XEvent *ev)
{
cberg_state *cberg = &cbergs[MI_SCREEN(mi)];
KeySym keysym = 0;
char c = 0;
if (ev->xany.type == KeyPress || ev->xany.type == KeyRelease)
XLookupString (&ev->xkey, &c, 1, &keysym, 0);
if (ev->xany.type == KeyPress) {
switch (keysym) {
case XK_Left: cberg->motion_state |= MOTION_LROT; break;
case XK_Prior: cberg->motion_state |= MOTION_LROT; break;
case XK_Right: cberg->motion_state |= MOTION_RROT; break;
case XK_Next: cberg->motion_state |= MOTION_RROT; break;
case XK_Down: cberg->motion_state |= MOTION_BACK; break;
case XK_Up: cberg->motion_state |= MOTION_FORW; break;
case '1': cberg->motion_state |= MOTION_DEC; break;
case '2': cberg->motion_state |= MOTION_INC; break;
case 'a': cberg->motion_state |= MOTION_LEFT; break;
case 'd': cberg->motion_state |= MOTION_RIGHT; break;
case 's': cberg->motion_state |= MOTION_BACK; break;
case 'w': cberg->motion_state |= MOTION_FORW; break;
default: return False;
}
cberg->motion_state |= MOTION_MANUAL;
} else if (ev->xany.type == KeyRelease) {
#if 0
XEvent peek_ev;
if (XPending(mi->dpy)) {
XPeekEvent(mi->dpy, &peek_ev);
if (peek_ev.type == KeyPress
&& peek_ev.xkey.keycode == ev->xkey.keycode
&& peek_ev.xkey.time - ev->xkey.time < 2) {
XNextEvent(mi->dpy, &peek_ev); /* drop bullshit repeat events */
return False;
}
}
#endif
switch (keysym) {
case XK_Left: cberg->motion_state &= ~MOTION_LROT; break;
case XK_Prior: cberg->motion_state &= ~MOTION_LROT; break;
case XK_Right: cberg->motion_state &= ~MOTION_RROT; break;
case XK_Next: cberg->motion_state &= ~MOTION_RROT; break;
case XK_Down: cberg->motion_state &= ~MOTION_BACK; break;
case XK_Up: cberg->motion_state &= ~MOTION_FORW; break;
case '1': cberg->motion_state &= ~MOTION_DEC; break;
case '2': cberg->motion_state &= ~MOTION_INC; break;
case 'a': cberg->motion_state &= ~MOTION_LEFT; break;
case 'd': cberg->motion_state &= ~MOTION_RIGHT; break;
case 's': cberg->motion_state &= ~MOTION_BACK; break;
case 'w': cberg->motion_state &= ~MOTION_FORW; break;
case ' ':
if (cberg->motion_state == MOTION_MANUAL)
cberg->motion_state = MOTION_AUTO;
break;
default: return False;
}
} else if (ev->xany.type == ButtonPress &&
ev->xbutton.button == Button1) {
cberg->button_down_p = True;
cberg->mouse_x = ev->xbutton.x;
cberg->mouse_y = ev->xbutton.y;
cberg->motion_state = MOTION_MANUAL;
cberg->paused.tv_sec = 0;
} else if (ev->xany.type == ButtonRelease &&
ev->xbutton.button == Button1) {
cberg->button_down_p = False;
cberg->motion_state = MOTION_AUTO;
/* After mouse-up, don't go back into auto-motion mode for a second, so
that repeated click-and-drag gestures don't fight with auto-motion. */
gettimeofday(&cberg->paused, NULL);
} else if (ev->xany.type == MotionNotify &&
cberg->button_down_p) {
int dx = ev->xmotion.x - cberg->mouse_x;
int dy = ev->xmotion.y - cberg->mouse_y;
cberg->mouse_x = ev->xmotion.x;
cberg->mouse_y = ev->xmotion.y;
cberg->motion_state = MOTION_MANUAL;
/* Take the larger dimension, since motion_state doesn't scale */
if (dx > 0 && dx > dy) dy = 0;
if (dx < 0 && dx < dy) dy = 0;
if (dy > 0 && dy > dx) dx = 0;
if (dy < 0 && dy < dx) dx = 0;
{
int rot = current_device_rotation();
int swap;
while (rot <= -180) rot += 360;
while (rot > 180) rot -= 360;
if (rot > 135 || rot < -135) /* 180 */
dx = -dx, dy = -dy;
else if (rot > 45) /* 90 */
swap = dx, dx = -dy, dy = swap;
else if (rot < -45) /* 270 */
swap = dx, dx = dy, dy = -swap;
}
if (dx > 0) cberg->motion_state |= MOTION_LEFT;
else if (dx < 0) cberg->motion_state |= MOTION_RIGHT;
else if (dy > 0) cberg->motion_state |= MOTION_FORW;
else if (dy < 0) cberg->motion_state |= MOTION_BACK;
} else
return False;
return True;
}
ENTRYPOINT void draw_crackberg (ModeInfo *mi)
{
cberg_state *cberg = &cbergs[MI_SCREEN(mi)];
struct timeval cur_frame_t;
double cur_frame;
static const float lpos[] = {2.0,0.0,-0.3,0.0};
if (!cberg->glx_context) /*XXX does this get externally tweaked? it kinda*/
return; /*XXX can't.. check it in crackberg_init*/
glXMakeCurrent(MI_DISPLAY(mi), MI_WINDOW(mi), *cberg->glx_context);
gettimeofday(&cur_frame_t, NULL);
cur_frame = cur_frame_t.tv_sec + cur_frame_t.tv_usec / 1.0E6;
if ( cberg->prev_frame ) { /*not first run */
cberg->elapsed = cur_frame - cberg->prev_frame;
if (cberg->motion_state == MOTION_AUTO &&
cberg->paused.tv_sec < cur_frame_t.tv_sec) {
cberg->x += cberg->dx * cberg->elapsed;
cberg->y += cberg->dy * cberg->elapsed;
/* cberg->z */
/* cberg->pitch */
/* cberg->roll */
cberg->yaw += cberg->dyaw * cberg->elapsed;
cberg->draw_elapsed += cberg->elapsed;
if (cberg->draw_elapsed >= 0.8) {
cberg->draw_elapsed = 0.0;
cberg->dx = drunken_rando(cberg->dx, 2.5, 0.8);
cberg->dy = drunken_rando(cberg->dy, 2.5, 0.8);
/* cberg->dz */
/* cberg->dpitch */
/* cberg->droll */
cberg->dyaw = drunken_rando(cberg->dyaw, 40.0, 8.0);
}
} else {
double scale = cberg->elapsed * cberg->mspeed;
if (cberg->motion_state & MOTION_BACK) {
cberg->x -= cos(cberg->yaw * M_PI_180) * scale;
cberg->y -= sin(cberg->yaw * M_PI_180) * scale;
}
if (cberg->motion_state & MOTION_FORW) {
cberg->x += cos(cberg->yaw * M_PI_180) * scale;
cberg->y += sin(cberg->yaw * M_PI_180) * scale;
}
if (cberg->motion_state & MOTION_LEFT) {
cberg->x -= sin(cberg->yaw * M_PI_180) * scale;
cberg->y += cos(cberg->yaw * M_PI_180) * scale;
}
if (cberg->motion_state & MOTION_RIGHT) {
cberg->x += sin(cberg->yaw * M_PI_180) * scale;
cberg->y -= cos(cberg->yaw * M_PI_180) * scale;
}
if (cberg->motion_state & MOTION_LROT)
cberg->yaw += 45 * scale;
if (cberg->motion_state & MOTION_RROT)
cberg->yaw -= 45 * scale;
if (cberg->motion_state & MOTION_DEC)
cberg->mspeed /= pow(MSPEED_SCALE, cberg->draw_elapsed);
if (cberg->motion_state & MOTION_INC)
cberg->mspeed *= pow(MSPEED_SCALE, cberg->draw_elapsed);
}
}
cberg->prev_frame = cur_frame;
mark_visible(cberg);
triles_update_state(&(cberg->trile_head), cberg);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
glRotatef(current_device_rotation(), 0, 0, 1);
gluLookAt(0,0,0, 1,0,0, 0,0,1);
glLightfv(GL_LIGHT0, GL_POSITION, lpos);
/*glRotated(cberg->roll, 1,0,0); / * XXX blah broken and unused for now..* /
glRotated(cberg->pitch, 0,1,0); */
glRotated(-cberg->yaw, 0,0,1); /* camera sees ->yaw over */
glTranslated(-cberg->x, -cberg->y, -cberg->z);
mi->polygon_count = cberg->ntris *
triles_foreach(cberg->trile_head, trile_draw,(void *) cberg);
if (mi->fps_p)
do_fps(mi);
#ifdef DEBUG
glBegin(GL_LINES);
glColor3f(1.0,0.0,0.0);
glVertex3d(x_shit, y_shit, 0.0);
glVertex3d(x_shit, y_shit, 1.0);
glEnd();
#endif
glFinish();
glXSwapBuffers(MI_DISPLAY(mi), MI_WINDOW(mi));
}
/* uh */
ENTRYPOINT void free_crackberg (ModeInfo *mi)
{
cberg_state *cberg = &cbergs[MI_SCREEN(mi)];
if (!cberg->glx_context) return;
glXMakeCurrent(MI_DISPLAY(mi), MI_WINDOW(mi), *cberg->glx_context);
while (cberg->all_triles) {
Trile *n = cberg->all_triles;
cberg->all_triles = n->next0;
free (n->l);
if (n->morph_data) free (n->morph_data);
free (n);
}
if (cberg->norms) free(cberg->norms);
if (cberg->heights) free(cberg->heights);
}
XSCREENSAVER_MODULE ("Crackberg", crackberg)
#endif /* USE_GL */