des.space.node source code

1 module des.space.node;
2 
3 public import des.math.linear.vector;
4 public import des.math.linear.matrix;
5 public import des.space.transform;
6 
7 import des.ts;
8 import des.arch.tree;
9 
10 ///
11 interface SpaceNode : Transform, TNode!(SpaceNode,"space")
12 {
13     /++ past code
14      + ---
15      + mixin spaceTNodeHelper!(true,true);
16      + ---
17      +
18      + if `with_matrix_field` field realization for `matrix` property (with setters)
19      +/
20     mixin template SpaceNodeHelper(bool with_matrix_field=true)
21     {
22         mixin spaceTNodeHelper!(true,true);
23 
24         static if( with_matrix_field )
25         {
26             protected mat4 self_mtr;
27 
28             public @property
29             {
30                 mat4 matrix() const { return self_mtr; }
31                 mat4 matrix( in mat4 m ) { self_mtr = m; return m; }
32 
33                 vec3 offset() const { return vec3( self_mtr.col(3).data[0..3] ); }
34                 vec3 offset( in vec3 o ) { self_mtr.setCol( 3, vec4( o, matrix[3][3] ) ); return o; }
35             }
36         }
37     }
38 
39     const @property
40     {
41         /// local to parent transform
42         mat4 matrix();
43 
44         /// in parent system
45         vec3 offset();
46 
47         final
48         {
49             /// e1
50             vec3 baseX() { return vec3( matrix.col(0).data[0 .. 3] ); }
51             /// e2
52             vec3 baseY() { return vec3( matrix.col(1).data[0 .. 3] ); }
53             /// e3
54             vec3 baseZ() { return vec3( matrix.col(2).data[0 .. 3] ); }
55         }
56     }
57 }
58 
59 final class DimmyNode : SpaceNode
60 {
61     mixin SpaceNodeHelper;
62     this( SpaceNode par = null ) { spaceParent = par; }
63 }
64 
65 unittest
66 {
67     auto tsn = new DimmyNode;
68 
69     assertEq( tsn.baseX, vec3( 1,0,0 ) );
70     assertEq( tsn.baseY, vec3( 0,1,0 ) );
71     assertEq( tsn.baseZ, vec3( 0,0,1 ) );
72     assertEq( tsn.offset, vec3( 0,0,0 ) );
73 
74     tsn.offset = vec3( 1, 2, 3 );
75 
76     assertEq( vec4( tsn.matrix.col(3) ), vec4(1,2,3,1) );
77     tsn.matrix = mat4.init;
78     assertEq( tsn.offset, vec3(0,0,0) );
79 }