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#include <stdlib.h>
#include "v3d.h"
#include "surf3d.h"
#include "goom_tools.h"
#include "goom_config.h"
#define D 256.0f
#define nbgrid 6
#define definitionx 15
#define definitionz 45
static float cycle = 0.0f;
static grid3d *grille[nbgrid];
static float *vals;
void tentacle_free (void) {
/* TODO : un vrai FREE GRID!! */
free (vals);
// free (grille);
}
void tentacle_new (void) {
int tmp;
v3d center = {0,-17.0,0};
vals = malloc ((definitionx+20)*sizeof(float));
for (tmp=0;tmp<nbgrid;tmp++) {
int x,z;
z = 45+rand()%30;
x = 85+rand()%5;
center.z = z;
grille[tmp] = grid3d_new (x,definitionx,z,definitionz+rand()%10,center);
center.y += 8;
}
}
static inline unsigned char
lighten (unsigned char value, float power)
{
int val = value;
float t = (float) val * log10(power) / 2.0;
if (t > 0) {
val = (int) t; // (32.0f * log (t));
if (val > 255)
val = 255;
if (val < 0)
val = 0;
return val;
}
else {
return 0;
}
}
static void
lightencolor (int *col, float power)
{
unsigned char *color;
color = (unsigned char *) col;
*color = lighten (*color, power);
color++;
*color = lighten (*color, power);
color++;
*color = lighten (*color, power);
color++;
*color = lighten (*color, power);
}
// retourne x>>s , en testant le signe de x
#define ShiftRight(_x,_s) ((_x<0) ? -(-_x>>_s) : (_x>>_s))
static
int evolutecolor (unsigned int src,unsigned int dest,
unsigned int mask, unsigned int incr) {
int color = src & (~mask);
src &= mask;
dest &= mask;
if ((src!=mask)
&&(src<dest))
src += incr;
if (src>dest)
src -= incr;
return (src&mask)|color;
}
static void pretty_move (float cycle,
float *dist,float *dist2,
float *rotangle) {
static float distt = 10.0f;
static float distt2 = 0.0f;
static float rot = 0.0f; // entre 0 et 2 * M_PI
static int happens = 0;
float tmp;
static int rotation = 0;
static int lock = 0;
if (happens)
happens -= 1;
else if (lock == 0) {
happens = iRAND(200)?0:100+iRAND(60);
lock = happens * 3 / 2;
}
else lock --;
// happens = 1;
tmp = happens?8.0f:0;
*dist2 = distt2 = (tmp + 15.0f*distt2)/16.0f;
tmp = 30+D-90.0f*(1.0f+sin(cycle*19/20));
if (happens)
tmp *= 0.6f;
*dist = distt = (tmp + 3.0f*distt)/4.0f;
if (!happens){
tmp = M_PI*sin(cycle)/32+3*M_PI/2;
}
else {
rotation = iRAND(500)?rotation:iRAND(2);
if (rotation)
cycle *= 2.0f*M_PI;
else
cycle *= -1.0f*M_PI;
tmp = cycle - (M_PI*2.0) * floor(cycle/(M_PI*2.0));
}
if (abs(tmp-rot) > abs(tmp-(rot+2.0*M_PI))) {
rot = (tmp + 15.0f*(rot+2*M_PI)) / 16.0f;
if (rot>2.0*M_PI)
rot -= 2.0*M_PI;
*rotangle = rot;
}
else if (abs(tmp-rot) > abs(tmp-(rot-2.0*M_PI))) {
rot = (tmp + 15.0f*(rot-2.0*M_PI)) / 16.0f;
if (rot<0.0f)
rot += 2.0*M_PI;
*rotangle = rot;
}
else
*rotangle = rot = (tmp + 15.0f*rot) / 16.0f;
}
void tentacle_update(int *buf, int *back, int W, int H,
short data[2][512], float rapport,
int drawit) {
int tmp;
int tmp2;
static int colors[] = {
(0x18<<(ROUGE*8))|(0x4c<<(VERT*8))|(0x2f<<(BLEU*8)),
(0x48<<(ROUGE*8))|(0x2c<<(VERT*8))|(0x6f<<(BLEU*8)),
(0x58<<(ROUGE*8))|(0x3c<<(VERT*8))|(0x0f<<(BLEU*8))};
static int col = (0x28<<(ROUGE*8))|(0x2c<<(VERT*8))|(0x5f<<(BLEU*8));
static int dstcol = 0;
static float lig = 1.15f;
static float ligs = 0.1f;
int color;
int colorlow;
float dist,dist2,rotangle;
if ((!drawit) && (ligs>0.0f))
ligs = -ligs;
lig += ligs;
if (lig > 1.01f) {
if ((lig>10.0f) | (lig<1.1f)) ligs = -ligs;
if ((lig<6.3f)&&(iRAND(30)==0))
dstcol=iRAND(3);
col = evolutecolor(col,colors[dstcol],0xff,0x01);
col = evolutecolor(col,colors[dstcol],0xff00,0x0100);
col = evolutecolor(col,colors[dstcol],0xff0000,0x010000);
col = evolutecolor(col,colors[dstcol],0xff000000,0x01000000);
color = col;
colorlow = col;
lightencolor(&color,lig * 2.0f + 2.0f);
lightencolor(&colorlow,(lig/3.0f)+0.67f);
rapport = 1.0f + 2.0f * (rapport - 1.0f);
rapport *= 1.2f;
if (rapport > 1.12f)
rapport = 1.12f;
pretty_move (cycle,&dist,&dist2,&rotangle);
for (tmp=0;tmp<nbgrid;tmp++) {
for (tmp2=0;tmp2<definitionx;tmp2++) {
float val = (float)(ShiftRight(data[0][iRAND(511)],10)) * rapport;
vals[tmp2] = val;
}
grid3d_update (grille[tmp],rotangle, vals, dist2);
}
cycle+=0.01f;
for (tmp=0;tmp<nbgrid;tmp++)
grid3d_draw (grille[tmp],color,colorlow,dist,buf,back,W,H);
}
else {
lig = 1.05f;
if (ligs < 0.0f)
ligs = -ligs;
pretty_move (cycle,&dist,&dist2,&rotangle);
cycle+=0.1f;
if (cycle > 1000)
cycle = 0;
}
}
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