Revision as of 19:22, 28 April 2014 (view source) rosettacode>AndiPersti m (→‎{{header\|Javascript}}: Changed "Javascript" to "JavaScript") ← Older edit		Revision as of 15:02, 29 April 2014 (view source) rosettacode>Bearophile (Updated D entry) Newer edit →
Line 620: <lang d>import std.stdio, std.math, std.algorithm, std.numeric; alias V3 = double[3] V3; V3immutable light = normalize([30.0, 30.0, -50.0]); ~~void~~V3 normalize(~~ref~~ V3 v) pure @nogc { v[] /= dotProduct(v, v) ^^ 0.5; return v; } double dot(in ref V3 x, in ref V3 y) pure nothrow @nogc { immutable double d = dotProduct(x, y); return d < 0 ? -d : 0; } void drawSphere(in double R, in double k, in double ambient)/@nogc/ { enum shades = ".:!oe&#%@"; foreach (~~int~~immutable i; cast(int)floor(-R) .. cast(int)ceil(R) + 1) { immutable double x = i + 0.5; foreach (~~int~~immutable j; cast(int)floor(-2 R) ..~~cast(int)ceil(2R)+1){~~ cast(int)ceil(2 R) + 1) { immutable double y = j / 2. + 0.5; if (x ^^ 2 + y ^^ 2 <= R ^^ 2) { V3immutable vec = [x, y, (R^^2 - x^^2 - y^^2) ^^ 0.5]; ~~vec~~ .normalize(); immutable double b = dot(light, vec) ^^ k + ambient; int intensity = cast(int)((1 - b) * (shades.length-1)); intensity = min(shades.length - 1, max(intensity, 0)); ~~putchar(~~shades[intensity]).putchar; } else ~~putchar(~~' ').putchar; } ~~putchar(~~'\n').putchar; } } void main() { ~~light.normalize();~~ drawSphere(20, 4, 0.1); drawSphere(10, 2, 0.4);

Draw a sphere: Difference between revisions

Draw a sphere (view source)