1al_use_transform(3)                                        al_use_transform(3)
2
3
4

NAME

6       al_use_transform - Allegro 5 API
7

SYNOPSIS

9              #include <allegro5/allegro.h>
10
11              void al_use_transform(const ALLEGRO_TRANSFORM *trans)
12

DESCRIPTION

14       Sets  the  transformation  to be used for the the drawing operations on
15       the target bitmap  (each  bitmap  maintains  its  own  transformation).
16       Every  drawing operation after this call will be transformed using this
17       transformation.  Call this function with an identity transformation  to
18       return to the default behaviour.
19
20       This function does nothing if there is no target bitmap.
21
22       The  parameter  is  passed by reference as an optimization to avoid the
23       overhead of stack copying.  The reference will not  be  stored  in  the
24       Allegro library so it is safe to pass references to local variables.
25
26              void setup_my_transformation(void)
27              {
28                 ALLEGRO_TRANSFORM transform;
29                 al_translate_transform(&transform, 5, 10);
30                 al_use_transform(&transform);
31              }
32
33       Parameters:
34
35       ยท trans - Transformation to use
36

SEE ALSO

38       al_get_current_transform(3), al_transform_coordinates(3)
39
40
41
42Allegro reference manual                                   al_use_transform(3)
Impressum