1
2void Visualizer::SetupView
() {
3 // set up projection
4 al_identity_transform(&proj_transform
);
5 //ltnrbf
6/// al_perspective_transform(&proj_transform , -urad/2.0 , urad/2.0 , urad , urad/2.0 , -urad/2.0 , urad*3.0);
7 double rad
= 1.
0;
8 al_perspective_transform
(&proj_transform ,
-rad
/2.
0 , rad
/2.
0 , rad , rad
/2.
0 ,
-rad
/2.
0 , urad
*15.
0);
9 al_use_projection_transform
(&proj_transform
);
10
11///void al_build_camera_transform(ALLEGRO_TRANSFORM *trans,
12/// float position_x, float position_y, float position_z,
13/// float look_x, float look_y, float look_z,
14/// float up_x, float up_y, float up_z)
15 al_build_camera_transform
(&cam_transform , cam_x , cam_y , cam_z , gcx , gcy , gcz ,
0.
0 ,
1.
0 ,
0.
0);
16 al_use_transform(&cam_transform
);
17
18
19}
20
21
22
23void Visualizer::ResetView
() {
24
25 ALLEGRO_TRANSFORM t
;
26 al_identity_transform(&t
);
27 al_use_transform(&t
);
28
29 al_identity_transform(&proj_transform
);
30 al_orthographic_transform
(&proj_transform ,
0 ,
0 ,
-1 ,
600 ,
600 ,
1);
31 al_use_projection_transform
(&proj_transform
);
32}
33
34
35void Visualizer::Draw
() {
36
37///int al_draw_prim(const void* vtxs, const ALLEGRO_VERTEX_DECL* decl, ALLEGRO_BITMAP* texture, int start, int end, int type)
38// al_hold_bitmap_drawing(true);
39
40 SetupView
();
41
42 // draw edges vertices and then the vertices
43 if (allegro_edges
) {
44 al_draw_prim(allegro_edges ,
0 ,
0 ,
0 , nallegro_edges , ALLEGRO_PRIM_LINE_LIST
);
45 }
46 if (allegro_vertices
) {
47 al_draw_prim(allegro_vertices ,
0 ,
0 ,
0 , nallegro_vertices , ALLEGRO_PRIM_POINT_LIST
);
48 }
49
50 if (allegro_shortest_path
) {
51 al_draw_prim(allegro_shortest_path ,
0 ,
0 ,
0 , nallegro_shortest_path , ALLEGRO_PRIM_LINE_STRIP
);
52 }
53
54 /// TODO Draw shortest path
55
56// al_hold_bitmap_drawing(false);
57 ResetView
();
58
59 al_draw_textf(font ,
al_map_rgb(255,
255,
255) ,
10.
0 ,
10.
0 ,
0 ,
60 "xyz = (%lf,%lf,%lf)" , transx , transy , transz
);
61
62 printf("xyz = (%lf,%lf,%lf) urad = %lf\n" , transx , transy , transz , urad
);
63
64}
There's a nice set of conversion functions on each page.
) :
I think that's why several people reported strangely rendered polygons in A Slug's Life.
