mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-06-27 23:08:31 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Add minor improvements and cleanup

Browse source
This commit is contained in:
Justine Tunney 2020-10-27 03:39:46 -07:00
parent 9e3e985ae5
commit feed0d2b0e
163 changed files with 2286 additions and 2245 deletions
Download patch file Download diff file Expand all files Collapse all files

64
tool/viz/deathstar.c
View file

@ -1,7 +1,9 @@
#include "dsp/tty/tty.h"
#include "libc/bits/safemacros.h"
#include "libc/calls/calls.h"
#include "libc/calls/struct/termios.h"
#include "libc/log/check.h"
#include "libc/log/color.h"
#include "libc/log/log.h"
#include "libc/macros.h"
#include "libc/math.h"
@ -21,10 +23,10 @@
#define WRITE(s) write(STDOUT_FILENO, s, strlen(s))
struct Sphere {
double cx, cy, cz, r;
long double cx, cy, cz, r;
};
const char *kShades[] = {
static const char *kShades[] = {
"\e[48;5;232m ", "\e[48;5;233m ", "\e[48;5;234m ", "\e[48;5;235m ",
"\e[48;5;236m ", "\e[48;5;237m ", "\e[48;5;238m ", "\e[48;5;239m ",
"\e[48;5;240m ", "\e[48;5;241m ", "\e[48;5;242m ", "\e[48;5;243m ",
@ -33,52 +35,53 @@ const char *kShades[] = {
"\e[48;5;252m ", "\e[48;5;253m ", "\e[48;5;254m ", "\e[48;5;255m ",
};
jmp_buf jb_;
double light_[3] = {-50, 0, 50};
struct Sphere pos_ = {11, 11, 11, 11};
struct Sphere neg_ = {1, 1, -4, 11};
static jmp_buf jb_;
static long double light_[3] = {-50, 0, 50};
static struct Sphere pos_ = {11, 11, 11, 11};
static struct Sphere neg_ = {1, 1, -4, 11};
static void OnCtrlC(int sig) {
longjmp(jb_, 1);
}
static void Normalize(double v[3]) {
double len;
len = 1 / sqrt(v[0] * v[0] + v[1] * v[1] + v[2] * v[2]);
static void Normalize(long double v[3]) {
long double len;
len = 1 / sqrtl(v[0] * v[0] + v[1] * v[1] + v[2] * v[2]);
v[0] *= len;
v[1] *= len;
v[2] *= len;
}
static double Dot(const double x[3], const double y[3]) {
return fabs(x[0] * y[0] + x[1] * y[1] + x[2] * y[2]);
static long double Dot(const long double x[3], const long double y[3]) {
return fabsl(x[0] * y[0] + x[1] * y[1] + x[2] * y[2]);
}
/* check if a ray (x,y, -inf)->(x, y, inf) hits a sphere; if so, return
the intersecting z values. z1 is closer to the eye */
static int HitSphere(struct Sphere *s, double x, double y, double z[2]) {
double zsq;
static int HitSphere(struct Sphere *s, long double x, long double y,
long double z[2]) {
long double zsq;
x -= s->cx;
y -= s->cy;
zsq = s->r * s->r - (x * x + y * y);
if (zsq < 0) {
return 0;
} else {
zsq = sqrt(zsq);
zsq = sqrtl(zsq);
z[0] = s->cz - zsq;
z[1] = s->cz + zsq;
return 1;
}
}
static void DrawSphere(double k, double ambient) {
static void DrawSphere(long double k, long double ambient) {
int i, j, hit_result;
double x, y, vec[3], zb[2], zs[2];
for (i = floor(pos_.cy - pos_.r); i <= ceil(pos_.cy + pos_.r); i++) {
y = i + .5;
for (j = floor(pos_.cx - 2 * pos_.r); j <= ceil(pos_.cx + 2 * pos_.r);
long double x, y, vec[3], zb[2], zs[2];
for (i = floorl(pos_.cy - pos_.r); i <= ceill(pos_.cy + pos_.r); i++) {
y = i + .5L;
for (j = floorl(pos_.cx - 2 * pos_.r); j <= ceill(pos_.cx + 2 * pos_.r);
j++) {
x = .5 * (j - pos_.cx) + .5 + pos_.cx;
x = .5L * (j - pos_.cx) + .5L + pos_.cx;
if (!HitSphere(&pos_, x, y, zb)) {
/* ray lands in blank space, draw bg */
hit_result = 0;
@ -114,10 +117,10 @@ static void DrawSphere(double k, double ambient) {
break;
}
Normalize(vec);
WRITE(
kShades[MIN(ARRAYLEN(kShades) - 1,
MAX(0, lround((1 - (pow(Dot(light_, vec), k) + ambient)) *
(ARRAYLEN(kShades) - 1))))]);
WRITE(kShades[min(
ARRAYLEN(kShades) - 1,
max(0, lroundl((1 - (powl(Dot(light_, vec), k) + ambient)) *
(ARRAYLEN(kShades) - 1))))]);
}
WRITE("\e[0m\n");
}
@ -125,7 +128,7 @@ static void DrawSphere(double k, double ambient) {
}
int main() {
double ang;
long double ang;
struct termios old;
if (cancolor()) {
WRITE("\e[?25l");
@ -134,13 +137,12 @@ int main() {
ang = 0;
for (;;) {
WRITE("\e[H");
light_[1] = cos(ang * 2);
light_[2] = cos(ang);
light_[0] = sin(ang);
light_[1] = cosl(ang * 2);
sincosl(ang, &light_[0], &light_[2]);
Normalize(light_);
ang += .05;
DrawSphere(1.5, .01);
usleep(1. / FRAMERATE * 1e6);
ang += .05L;
DrawSphere(1.5L, .01L);
usleep(1.L / FRAMERATE * 1e6);
}
}
WRITE("\e[0m\e[H\e[J\e[?25h");