gl3n_extra.linalg source code

1 //          Copyright Ferdinand Majerech 2014.
2 // Distributed under the Boost Software License, Version 1.0.
3 //    (See accompanying file LICENSE_1_0.txt or copy at
4 //          http://www.boost.org/LICENSE_1_0.txt)
5 
6 
7 /// Functionality extending gl3n.linalg
8 module gl3n_extra.linalg;
9 
10 public import gl3n.linalg;
11 
12 
13 /// Readability shortcuts.
14 alias Vector!(uint, 2) vec2u;
15 alias Vector!(uint, 3) vec3u;
16 alias Vector!(uint, 4) vec4u;
17 alias Vector!(ubyte, 2) vec2ub;
18 alias Vector!(ubyte, 3) vec3ub;
19 alias Vector!(ubyte, 4) vec4ub;
20 alias Matrix!(float, 3, 2) mat32;
21 alias Matrix!(float, 4, 2) mat42;
22 alias Matrix!(float, 2, 3) mat23;
23 alias Matrix!(float, 4, 3) mat43;
24 alias Matrix!(float, 2, 4) mat24;
25 alias Matrix!(double, 2, 2) mat2d;
26 alias Matrix!(double, 3, 3) mat3d;
27 alias Matrix!(double, 4, 4) mat4d;
28 alias Matrix!(double, 3, 2) mat32d;
29 alias Matrix!(double, 4, 2) mat42d;
30 alias Matrix!(double, 2, 3) mat23d;
31 alias Matrix!(double, 4, 3) mat43d;
32 alias Matrix!(double, 2, 4) mat24d;
33 alias Matrix!(double, 3, 4) mat34d;
34 
35 // Called setLength() because length() doesn't seem to work correctly with UFCS.
36 /// Set length of the vector, resizing it but preserving its direction.
37 void setLength(T, size_t dim)(ref Vector!(T, dim) vector, T length) @safe pure nothrow @nogc
38 {
39     const oldLength = vector.length;
40     assert(oldLength != 0.0f, "Cannot set length of a zero vector!");
41     const ratio = length / oldLength;
42     vector *= ratio;
43 }