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Pay off more technical debt

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This makes breaking changes to add underscores to many non-standard
function names provided by the c library. MODE=tiny is now tinier and
we now use smaller locks that are better for tiny apps in this mode.
Some headers have been renamed to be in the same folder as the build
package, so it'll be easier to know which build dependency is needed.
Certain old misguided interfaces have been removed. Intel intrinsics
headers are now listed in libc/isystem (but not in the amalgamation)
to help further improve open source compatibility. Header complexity
has also been reduced. Lastly, more shell scripts are now available.
This commit is contained in:
Justine Tunney 2022-09-12 23:10:38 -07:00
parent b69f3d2488
commit 6f7d0cb1c3
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GPG key ID: BE714B4575D6E328
960 changed files with 4072 additions and 4873 deletions
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59
tool/viz/deathstar.c
View file

@ -1,29 +1,21 @@
#include "dsp/tty/tty.h"
#include "libc/intrin/safemacros.internal.h"
#include "libc/calls/calls.h"
#include "libc/calls/struct/sigaction.h"
#include "libc/calls/struct/termios.h"
#include "libc/log/check.h"
#include "libc/log/color.internal.h"
#include "libc/log/log.h"
#include "libc/macros.internal.h"
#include "libc/math.h"
#include "libc/intrin/safemacros.internal.h"
#include "libc/runtime/runtime.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/fileno.h"
#include "libc/sysv/consts/sig.h"
#include "libc/time/time.h"
#include "libc/x/x.h"
#include "third_party/libcxx/math.h"
/**
* @fileoverview demo code borrowed from Rosetta Code.
*/
#define FRAMERATE 23.976
#define WRITE(s) write(STDOUT_FILENO, s, strlen(s))
#define WRITE(s) write(1, s, strlen(s))
struct Sphere {
long double cx, cy, cz, r;
double cx, cy, cz, r;
};
static const char *kShades[] = {
@ -36,7 +28,7 @@ static const char *kShades[] = {
};
static jmp_buf jb_;
static long double light_[3] = {-50, 0, 50};
static double light_[3] = {-50, 0, 50};
static struct Sphere pos_ = {11, 11, 11, 11};
static struct Sphere neg_ = {1, 1, -4, 11};
@ -44,42 +36,41 @@ static void OnCtrlC(int sig) {
longjmp(jb_, 1);
}
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]);
static void Normalize(double v[3]) {
double len;
len = 1 / sqrt(v[0] * v[0] + v[1] * v[1] + v[2] * v[2]);
v[0] *= len;
v[1] *= len;
v[2] *= len;
}
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]);
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]);
}
/* 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, long double x, long double y,
long double z[2]) {
long double zsq;
static int HitSphere(struct Sphere *s, double x, double y, double z[2]) {
double zsq;
x -= s->cx;
y -= s->cy;
zsq = s->r * s->r - (x * x + y * y);
if (zsq < 0) {
return 0;
} else {
zsq = sqrtl(zsq);
zsq = sqrt(zsq);
z[0] = s->cz - zsq;
z[1] = s->cz + zsq;
return 1;
}
}
static void DrawSphere(long double k, long double ambient) {
static void DrawSphere(double k, double ambient) {
int i, j, hit_result;
long double x, y, vec[3], zb[2], zs[2];
for (i = floorl(pos_.cy - pos_.r); i <= ceill(pos_.cy + pos_.r); i++) {
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 + .5L;
for (j = floorl(pos_.cx - 2 * pos_.r); j <= ceill(pos_.cx + 2 * pos_.r);
for (j = floor(pos_.cx - 2 * pos_.r); j <= ceil(pos_.cx + 2 * pos_.r);
j++) {
x = .5L * (j - pos_.cx) + .5L + pos_.cx;
if (!HitSphere(&pos_, x, y, zb)) {
@ -117,10 +108,10 @@ static void DrawSphere(long double k, long double ambient) {
break;
}
Normalize(vec);
WRITE(kShades[min(
ARRAYLEN(kShades) - 1,
max(0, lroundl((1 - (powl(Dot(light_, vec), k) + ambient)) *
(ARRAYLEN(kShades) - 1))))]);
WRITE(
kShades[min(ARRAYLEN(kShades) - 1,
max(0, lround((1 - (pow(Dot(light_, vec), k) + ambient)) *
(ARRAYLEN(kShades) - 1))))]);
}
WRITE("\e[0m\n");
}
@ -128,16 +119,16 @@ static void DrawSphere(long double k, long double ambient) {
}
int main() {
long double ang;
double ang;
struct termios old;
WRITE("\e[?25l");
if (!setjmp(jb_)) {
xsigaction(SIGINT, OnCtrlC, 0, 0, NULL);
signal(SIGINT, OnCtrlC);
ang = 0;
for (;;) {
WRITE("\e[H");
light_[1] = cosl(ang * 2);
sincosl(ang, &light_[0], &light_[2]);
sincos(ang, &light_[0], &light_[2]);
Normalize(light_);
ang += .05L;
DrawSphere(1.5L, .01L);