#include <u.h> #include <libc.h> #include <geometry.h> // https://iquilezles.org/articles/distfunctions double sdSphere(Point3 p, double r) { return vec3len(p)-r; } Point3 map(Point3 p, double time) { double d; d = sdSphere(p, 0.2); return Pt3(d, p.x, p.y, p.z); } // https://iquilezles.org/articles/normalsSDF Point3 calcNormal(Point3 pos, double time) { Point3 n, e, e₂; int i; n = Vec3(0,0,0); for(i = 0; i < 4; i++){ e = Vec3((((i+3)>>1)&1),((i>>1)&1),(i&1)); e = mulpt3(subpt3(mulpt3(e, 2), Vec3(1,1,1)), 0.5773); e₂ = mulpt3(e, 0.0005); n = addpt3(n, mulpt3(e, map(addpt3(pos, e₂), time).x)); } return normvec3(n); } void main(int, char **) { Point3 p, n; p = Pt3(0,1,1,1); n = calcNormal(p, 0); exits(nil); }
Tue Mar 19 07:50:00 EDT 2024
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Tue Mar 19 04:48:51 EDT 2024
Before the vegetable not me tried Always already just avoided But the vegetable: tasty actually When stewed you it Colorful The life Colorful the life The stewed vegetable Stewed vegetable, taste really The each gulp: full of joy Stewed vegetable, taste gobbled Strengthen I, all: can done Stew still only: healthy already Put of Knorr and vegetable, we: happy happy Bettering of all the study and play So let's already gulp already you
Tue Mar 19 03:06:58 EDT 2024
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Tue Mar 19 02:02:46 EDT 2024
#include <u.h> #include <libc.h> /* middle of the road */ #define V ((1ULL<<31)+3) void main() { uvlong i; uvlong v; vlong s, e; s = nsec(); for(i = 0; i < 10000000; i++){ v = V; if(v & 1) do v = (v >> 1) | (1ULL<<63); while(v & 1); while(!(v & 1)) v >>= 1; // print("0b%ullb\n", v); } e = nsec(); print("normal way: %lldms\n", (e-s)/1000000); s = nsec(); for(i = 0; i < 10000000; i++){ v = V; if(v & 1){ v = ~v; v = ~(v/(v & -v)); } v /= (v & -v); // print("0b%ullb\n", v); } e = nsec(); print("other way: %lldms\n", (e-s)/1000000); }
Tue Mar 19 01:55:30 EDT 2024
#include <u.h> #include <libc.h> /* middle of the road */ #define V (1ULL<<31) void main() { uvlong i; uvlong v; vlong s, e; v = V; s = nsec(); for(i = 0; i < 10000000; i++){ if(v & 1) while(v & 1) v = (v >> 1) | (1ULL<<63); while(!(v & 1)) v >>= 1; } e = nsec(); print("normal way: %lldms\n", (e-s)/1000000); v = V; s = nsec(); for(i = 0; i < 10000000; i++){ if(v & 1){ v = ~v; v = ~(v/(v & -v)); } v /= (v & -v); } e = nsec(); print("other way: %lldms\n", (e-s)/1000000); }
Tue Mar 19 00:04:31 EDT 2024
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Mon Mar 18 23:57:08 EDT 2024
Ola, quería saber o seu prezo.
Mon Mar 18 21:28:11 EDT 2024
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Mon Mar 18 20:14:49 EDT 2024
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