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[svn r181] Updated the raytracer demo by downs to work with tango :) My quick benchmarking shows it to be around 65% faster than DMD :D
author lindquist
date Mon, 05 May 2008 22:20:07 +0200
parents 5071469303d4
children a2c4dc388d5e
comparison
equal deleted inserted replaced
164:a64becf2a702 165:9922b9982552
1 import std.stdio; 1 import tango.stdc.stdio;
2
3 alias char[] string;
2 4
3 int atoi(char[] s) { 5 int atoi(char[] s) {
4 int i, fac=1; 6 int i, fac=1;
5 bool neg = (s.length) && (s[0] == '-'); 7 bool neg = (s.length) && (s[0] == '-');
6 char[] a = neg ? s[1..$] : s; 8 char[] a = neg ? s[1..$] : s;
9 fac *= 10; 11 fac *= 10;
10 } 12 }
11 return !neg ? i : -i; 13 return !neg ? i : -i;
12 } 14 }
13 15
16 version(LLVMDC)
17 {
14 pragma(LLVM_internal, "intrinsic", "llvm.sqrt.f64") 18 pragma(LLVM_internal, "intrinsic", "llvm.sqrt.f64")
15 double sqrt(double val); 19 double sqrt(double val);
20 }
21 else
22 {
23 import tango.stdc.math;
24 }
16 25
17 double delta; 26 double delta;
18 static this() { delta=sqrt(real.epsilon); } 27 static this() { delta=sqrt(real.epsilon); }
19 28
20 struct Vec { 29 struct Vec {
102 void main(string[] args) { 111 void main(string[] args) {
103 int level = (args.length==3 ? args[1].atoi() : 9), 112 int level = (args.length==3 ? args[1].atoi() : 9),
104 n = (args.length==3 ? args[2].atoi() : 512), ss = 4; 113 n = (args.length==3 ? args[2].atoi() : 512), ss = 4;
105 auto light = Vec(-1, -3, 2).unitise(); 114 auto light = Vec(-1, -3, 2).unitise();
106 auto s=create(level, Vec(0, -1, 0), 1); 115 auto s=create(level, Vec(0, -1, 0), 1);
107 writefln("P5\n", n, " ", n, "\n255"); 116 printf("P5\n%d %d\n255", n,n);
108 for (int y=n-1; y>=0; --y) 117 for (int y=n-1; y>=0; --y)
109 for (int x=0; x<n; ++x) { 118 for (int x=0; x<n; ++x) {
110 double g=0; 119 double g=0;
111 for (int d=0; d<ss*ss; ++d) { 120 for (int d=0; d<ss*ss; ++d) {
112 auto dir=Vec(x+(d%ss)*1.0/ss-n/2.0, y+(d/ss)*1.0/ss-n/2.0, n).unitise(); 121 auto dir=Vec(x+(d%ss)*1.0/ss-n/2.0, y+(d/ss)*1.0/ss-n/2.0, n).unitise();
113 g += ray_trace(light, Ray(Vec(0, 0, -4), dir), s); 122 g += ray_trace(light, Ray(Vec(0, 0, -4), dir), s);
114 } 123 }
115 printf("%c", cast(ubyte)(0.5 + 255.0 * g / (ss*ss))); 124 printf("%c", cast(ubyte)(0.5 + 255.0 * g / (ss*ss)));
116 } 125 }
117 } 126 }