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xenocara/app/xlockmore/modes/glx/noof.c
matthieu 110b2a9207 Importing xlockmore 5.22
2006-11-26 11:07:42 +00:00

572 lines
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/* -*- Mode: C; tab-width: 4 -*- */
/* noof --- SGI Diatoms */
#if !defined( lint ) && !defined( SABER )
static const char sccsid[] = "@(#)noof.c 5.04 2002/02/10 xlockmore";
#endif
/*-
* 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.
*
* Revision History:
* 10-Feb-2001: From the GLUT demo distribution by Mark Kilgard
* <mjk@nvidia.com> ported by Dave Riesz <driesz@cpl.net>
*/
#ifdef VMS
#include <X11/Intrinsic.h>
#endif
#ifdef STANDALONE
# define MODE_noof
# define PROGCLASS "Noof"
# define HACK_INIT init_noof
# define HACK_DRAW draw_noof
# define HACK_RESHAPE reshape_noof
# define noof_opts xlockmore_opts
# define DEFAULTS "*delay: 1000 \n"
# include "xlockmore.h" /* from the xscreensaver distribution */
#else /* !STANDALONE */
# include "xlock.h" /* from the xlockmore distribution */
# include "visgl.h"
#endif /* !STANDALONE */
#ifdef MODE_noof
#define MINSIZE 32 /* minimal viewport size */
#undef countof
#define countof(x) (sizeof((x))/sizeof((*x)))
ModeSpecOpt noof_opts =
{0, (XrmOptionDescRec *) NULL, 0, (argtype *) NULL, (OptionStruct *) NULL};
#ifdef USE_MODULES
ModStruct noof_description =
{"noof", "init_noof", "draw_noof", "release_noof",
"draw_noof", "init_noof", (char *) NULL, &noof_opts,
1000, 1, 1, 1, 64, 1.0, "",
"Shows SGI Diatoms", 0, NULL};
#endif
#define N_SHAPES 7
typedef struct {
GLXContext *glx_context;
Window window;
float ht, wd;
float pos[N_SHAPES * 3];
float dir[N_SHAPES * 3];
float acc[N_SHAPES * 3];
float col[N_SHAPES * 3];
float hsv[N_SHAPES * 3];
float hpr[N_SHAPES * 3];
float ang[N_SHAPES];
float spn[N_SHAPES];
float sca[N_SHAPES];
float geep[N_SHAPES];
float peep[N_SHAPES];
float speedsq[N_SHAPES];
int blad[N_SHAPES];
int tko;
} noofstruct;
static noofstruct *noof = (noofstruct *) NULL;
/* For portability... */
#undef fcos
#undef fsin
#define fcos cos
#define fsin sin
/* function declarations */
static void oneFrame(noofstruct *np);
static void motionUpdate(noofstruct *np, int t);
static void colorUpdate(noofstruct *np, int i);
static void gravity(noofstruct *np, float fx);
static void drawleaf(noofstruct *np, int l);
static void initshapes(noofstruct *np, int i);
/* new window size or exposure */
static void
reshape_noof(ModeInfo *mi, int width, int height)
{
noofstruct *np;
if(noof == NULL) return;
np = &noof[MI_SCREEN(mi)];
if(!np->glx_context) return;
glXMakeCurrent(MI_DISPLAY(mi), MI_WINDOW(mi), *(np->glx_context));
/* from myinit */
glClearColor(0.0, 0.0, 0.0, 1.0);
glEnable(GL_LINE_SMOOTH);
glShadeModel(GL_FLAT);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
if (width <= height) {
np->wd = 1.0;
np->ht = (GLfloat) height / (GLfloat) width;
glOrtho(0.0, 1.0,
0.0, 1.0 * (GLfloat) height / (GLfloat) width,
-16.0, 4.0);
} else {
np->wd = (GLfloat) width / (GLfloat) height;
np->ht = 1.0;
glOrtho(0.0, 1.0 * (GLfloat) width / (GLfloat) height,
0.0, 1.0,
-16.0, 4.0);
}
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glClear(GL_COLOR_BUFFER_BIT);
glXSwapBuffers(MI_DISPLAY(mi), MI_WINDOW(mi));
}
static void
pinit(ModeInfo * mi)
{
int i;
noofstruct *np;
if(noof == NULL) return;
np = &noof[MI_SCREEN(mi)];
for (i = 0; i < N_SHAPES; i++)
initshapes(np, i);
np->tko = 0;
}
void
init_noof(ModeInfo * mi)
{
noofstruct *np;
if (noof == NULL) {
if ((noof = (noofstruct *) calloc(MI_NUM_SCREENS(mi),
sizeof (noofstruct))) == NULL)
return;
}
np = &noof[MI_SCREEN(mi)];
if ((np->glx_context = init_GL(mi)) != NULL)
{
reshape_noof(mi, MI_WIDTH(mi), MI_HEIGHT(mi));
glDrawBuffer(GL_FRONT);
pinit(mi);
}
else
{
MI_CLEARWINDOW(mi);
}
}
void
draw_noof(ModeInfo * mi)
{
noofstruct *np;
if(noof == NULL) return;
np = &noof[MI_SCREEN(mi)];
MI_IS_DRAWN(mi) = True;
if(!np->glx_context) return;
glXMakeCurrent(MI_DISPLAY(mi), MI_WINDOW(mi), *(np->glx_context));
oneFrame(np);
}
void
release_noof(ModeInfo * mi)
{
if (noof != NULL) {
int screen;
for (screen = 0; screen < MI_NUM_SCREENS(mi); screen++) {
noofstruct *np = &noof[screen];
if (np->glx_context) {
np->glx_context = (GLXContext *) NULL;
}
}
free(noof);
noof = (noofstruct *) NULL;
}
FreeAllGL(mi);
}
/******************************************************************************/
/* --- shape parameters def'n --- */
static void
initshapes(noofstruct *np, int i)
{
int k;
float f;
/* random init of pos, dir, color */
for (k = i * 3; k <= i * 3 + 2; k++) {
f = ((float) LRAND() / (float) MAXRAND);
np->pos[k] = f;
f = ((float) LRAND() / (float) MAXRAND);
f = (f - 0.5) * 0.05;
np->dir[k] = f;
f = ((float) LRAND() / (float) MAXRAND);
f = (f - 0.5) * 0.0002;
np->acc[k] = f;
f = ((float) LRAND() / (float) MAXRAND);
np->col[k] = f;
}
np->speedsq[i] = np->dir[i * 3] * np->dir[i * 3] + np->dir[i * 3 + 1] * np->dir[i * 3 + 1];
f = ((float) LRAND() / (float) MAXRAND);
np->blad[i] = 2 + (int) (f * 17.0);
f = ((float) LRAND() / (float) MAXRAND);
np->ang[i] = f;
f = ((float) LRAND() / (float) MAXRAND);
np->spn[i] = (f - 0.5) * 40.0 / (10 + np->blad[i]);
f = ((float) LRAND() / (float) MAXRAND);
np->sca[i] = (f * 0.1 + 0.08);
np->dir[i * 3] *= np->sca[i];
np->dir[i * 3 + 1] *= np->sca[i];
f = ((float) LRAND() / (float) MAXRAND);
np->hsv[i * 3] = f * 360.0;
f = ((float) LRAND() / (float) MAXRAND);
np->hsv[i * 3 + 1] = f * 0.6 + 0.4;
f = ((float) LRAND() / (float) MAXRAND);
np->hsv[i * 3 + 2] = f * 0.7 + 0.3;
f = ((float) LRAND() / (float) MAXRAND);
np->hpr[i * 3] = f * 0.005 * 360.0;
f = ((float) LRAND() / (float) MAXRAND);
np->hpr[i * 3 + 1] = f * 0.03;
f = ((float) LRAND() / (float) MAXRAND);
np->hpr[i * 3 + 2] = f * 0.02;
np->geep[i] = 0;
f = ((float) LRAND() / (float) MAXRAND);
np->peep[i] = 0.01 + f * 0.2;
}
static float bladeratio[] =
{
/* nblades = 2..7 */
0.0, 0.0, 3.00000, 1.73205, 1.00000, 0.72654, 0.57735, 0.48157,
/* 8..13 */
0.41421, 0.36397, 0.19076, 0.29363, 0.26795, 0.24648,
/* 14..19 */
0.22824, 0.21256, 0.19891, 0.18693, 0.17633, 0.16687,
};
static void
drawleaf(noofstruct *np, int l)
{
int b, blades;
float x, y;
float wobble;
blades = np->blad[l];
y = 0.10 * fsin(np->geep[l] * M_PI / 180.0) + 0.099 * fsin(np->geep[l] * 5.12 * M_PI / 180.0);
if (y < 0)
y = -y;
x = 0.15 * fcos(np->geep[l] * M_PI / 180.0) + 0.149 * fcos(np->geep[l] * 5.12 * M_PI / 180.0);
if (x < 0.0)
x = 0.0 - x;
if (y < 0.001 && x > 0.000002 && ((np->tko & 0x1) == 0)) {
initshapes(np, l); /* let it become reborn as something
else */
np->tko++;
return;
} {
float w1 = fsin(np->geep[l] * 15.3 * M_PI / 180.0);
wobble = 3.0 + 2.00 * fsin(np->geep[l] * 0.4 * M_PI / 180.0) + 3.94261 * w1;
}
/**
if(blades == 2) if (y > 3.000*x) y = x*3.000;
if(blades == 3) if (y > 1.732*x) y = x*1.732;
if(blades == 4) if (y > x) y = x;
if(blades == 5) if (y > 0.726*x) y = x*0.726;
if(blades == 6) if (y > 0.577*x) y = x*0.577;
if(blades == 7) if (y > 0.481*x) y = x*0.481;
if(blades == 8) if (y > 0.414*x) y = x*0.414;
*/
if (y > x * bladeratio[blades])
y = x * bladeratio[blades];
for (b = 0; b < blades; b++) {
glPushMatrix();
glTranslatef(np->pos[l * 3], np->pos[l * 3 + 1], np->pos[l * 3 + 2]);
glRotatef(np->ang[l] + b * (360.0 / blades), 0.0, 0.0, 1.0);
glScalef(wobble * np->sca[l], wobble * np->sca[l], wobble * np->sca[l]);
/**
if(np->tko & 0x40000) glColor3f(np->col[l*3], np->col[l*3+1], np->col[l*3+2]);
else
*/
glColor4ub(0, 0, 0, 0x60);
/* constrain geep cooridinates here XXX */
glEnable(GL_BLEND);
glBegin(GL_TRIANGLE_STRIP);
glVertex2f(x * np->sca[l], 0.0);
glVertex2f(x, y);
glVertex2f(x, -y); /* C */
glVertex2f(0.3, 0.0); /* D */
glEnd();
/**
if(np->tko++ & 0x40000) glColor3f(0,0,0);
else
*/
glColor3f(np->col[l * 3], np->col[l * 3 + 1], np->col[l * 3 + 2]);
glBegin(GL_LINE_LOOP);
glVertex2f(x * np->sca[l], 0.0);
glVertex2f(x, y);
glVertex2f(0.3, 0.0); /* D */
glVertex2f(x, -y); /* C */
glEnd();
glDisable(GL_BLEND);
glPopMatrix();
}
}
static void
motionUpdate(noofstruct *np, int t)
{
if (np->pos[t * 3] < -np->sca[t] * np->wd && np->dir[t * 3] < 0.0) {
np->dir[t * 3] = -np->dir[t * 3];
/**
np->acc[t*3+1] += 0.8*np->acc[t*3];
np->acc[t*3] = -0.8*np->acc[t*3];
*/
} else if (np->pos[t * 3] > (1 + np->sca[t]) * np->wd && np->dir[t * 3] > 0.0) {
np->dir[t * 3] = -np->dir[t * 3];
/**
np->acc[t*3+1] += 0.8*np->acc[t*3];
np->acc[t*3] = -0.8*np->acc[t*3];
*/
} else if (np->pos[t * 3 + 1] < -np->sca[t] * np->ht && np->dir[t * 3 + 1] < 0.0) {
np->dir[t * 3 + 1] = -np->dir[t * 3 + 1];
/**
np->acc[t*3] += 0.8*np->acc[t*3+1];
np->acc[t*3+1] = -0.8*np->acc[t*3+1];
*/
} else if (np->pos[t * 3 + 1] > (1 + np->sca[t]) * np->ht && np->dir[t * 3 + 1] > 0.0) {
np->dir[t * 3 + 1] = -np->dir[t * 3 + 1];
/**
np->acc[t*3] += 0.8*np->acc[t*3+1];
np->acc[t*3+1] = -0.8*np->acc[t*3+1];
*/
}
np->pos[t * 3] += np->dir[t * 3];
np->pos[t * 3 + 1] += np->dir[t * 3 + 1];
/**
np->dir[t*3] += np->acc[t*3];
np->dir[t*3+1] += np->acc[t*3+1];
*/
np->ang[t] += np->spn[t];
np->geep[t] += np->peep[t];
if (np->geep[t] > 360 * 5.0)
np->geep[t] -= 360 * 5.0;
if (np->ang[t] < 0.0) {
np->ang[t] += 360.0;
}
if (np->ang[t] > 360.0) {
np->ang[t] -= 360.0;
}
}
static void
colorUpdate(noofstruct *np, int i)
{
if (np->hsv[i * 3 + 1] <= 0.5 && np->hpr[i * 3 + 1] < 0.0)
np->hpr[i * 3 + 1] = -np->hpr[i * 3 + 1]; /* adjust s */
if (np->hsv[i * 3 + 1] >= 1.0 && np->hpr[i * 3 + 1] > 0.0)
np->hpr[i * 3 + 1] = -np->hpr[i * 3 + 1]; /* adjust s */
if (np->hsv[i * 3 + 2] <= 0.4 && np->hpr[i * 3 + 2] < 0.0)
np->hpr[i * 3 + 2] = -np->hpr[i * 3 + 2]; /* adjust s */
if (np->hsv[i * 3 + 2] >= 1.0 && np->hpr[i * 3 + 2] > 0.0)
np->hpr[i * 3 + 2] = -np->hpr[i * 3 + 2]; /* adjust s */
np->hsv[i * 3] += np->hpr[i * 3];
np->hsv[i * 3 + 1] += np->hpr[i * 3 + 1];
np->hsv[i * 3 + 2] += np->hpr[i * 3 + 2];
/* --- hsv -> rgb --- */
#define H(hhh) hhh[i*3 ]
#define S(hhh) hhh[i*3+1]
#define V(hhh) hhh[i*3+2]
#define R(hhh) hhh[i*3 ]
#define G(hhh) hhh[i*3+1]
#define B(hhh) hhh[i*3+2]
if (V(np->hsv) < 0.0)
V(np->hsv) = 0.0;
if (V(np->hsv) > 1.0)
V(np->hsv) = 1.0;
if (S(np->hsv) <= 0.0) {
R(np->col) = V(np->hsv);
G(np->col) = V(np->hsv);
B(np->col) = V(np->hsv);
} else {
float f, h, p, q, t, v;
int hi;
while (H(np->hsv) < 0.0)
H(np->hsv) += 360.0;
while (H(np->hsv) >= 360.0)
H(np->hsv) -= 360.0;
if (S(np->hsv) < 0.0)
S(np->hsv) = 0.0;
if (S(np->hsv) > 1.0)
S(np->hsv) = 1.0;
h = H(np->hsv) / 60.0;
hi = (int) (h);
f = h - hi;
v = V(np->hsv);
p = V(np->hsv) * (1 - S(np->hsv));
q = V(np->hsv) * (1 - S(np->hsv) * f);
t = V(np->hsv) * (1 - S(np->hsv) * (1 - f));
if (hi <= 0) {
R(np->col) = v;
G(np->col) = t;
B(np->col) = p;
} else if (hi == 1) {
R(np->col) = q;
G(np->col) = v;
B(np->col) = p;
} else if (hi == 2) {
R(np->col) = p;
G(np->col) = v;
B(np->col) = t;
} else if (hi == 3) {
R(np->col) = p;
G(np->col) = q;
B(np->col) = v;
} else if (hi == 4) {
R(np->col) = t;
G(np->col) = p;
B(np->col) = v;
} else {
R(np->col) = v;
G(np->col) = p;
B(np->col) = q;
}
}
}
static void
gravity(noofstruct *np, float fx)
{
int a, b;
for (a = 0; a < N_SHAPES; a++) {
for (b = 0; b < a; b++) {
float t, d2;
t = np->pos[b * 3] - np->pos[a * 3];
d2 = t * t;
t = np->pos[b * 3 + 1] - np->pos[a * 3 + 1];
d2 += t * t;
if (d2 < 0.000001)
d2 = 0.00001;
if (d2 < 0.1) {
float v0, v1, z;
v0 = np->pos[b * 3] - np->pos[a * 3];
v1 = np->pos[b * 3 + 1] - np->pos[a * 3 + 1];
z = 0.00000001 * fx / (d2);
np->dir[a * 3] += v0 * z * np->sca[b];
np->dir[b * 3] += -v0 * z * np->sca[a];
np->dir[a * 3 + 1] += v1 * z * np->sca[b];
np->dir[b * 3 + 1] += -v1 * z * np->sca[a];
}
}
/** apply brakes
if(np->dir[a*3]*np->dir[a*3] + np->dir[a*3+1]*np->dir[a*3+1]
> 0.0001) {
np->dir[a*3] *= 0.9;
np->dir[a*3+1] *= 0.9;
}
*/
}
}
static void
oneFrame(noofstruct *np)
{
int i;
/**
if((LRAND() & 0xff) == 0x34){
glClear(GL_COLOR_BUFFER_BIT);
}
if((np->tko & 0x1f) == 0x1f){
glEnable(GL_BLEND);
glColor4f(0.0, 0.0, 0.0, 0.09);
glRectf(0.0, 0.0, np->wd, np->ht);
glDisable(GL_BLEND);
#ifdef __sgi
sginap(0);
#endif
}
*/
gravity(np, -2.0);
for (i = 0; i < N_SHAPES; i++) {
motionUpdate(np, i);
#ifdef __sgi
sginap(0);
#endif
colorUpdate(np, i);
#ifdef __sgi
sginap(0);
#endif
drawleaf(np, i);
#ifdef __sgi
sginap(0);
#endif
}
glFlush();
}
#endif
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