NAME

       al_use_transform - Allegro 5 API

SYNOPSIS

              #include <allegro5/allegro.h>

              void al_use_transform(const ALLEGRO_TRANSFORM *trans)

DESCRIPTION

       Sets  the  transformation  to  be used for the the drawing operations on the target bitmap
       (each bitmap maintains its own transformation).  Every drawing operation after  this  call
       will  be  transformed  using  this  transformation.   Call  this function with an identity
       transformation to return to the default behaviour.

       This function does nothing if there is no target bitmap.

       The parameter is passed by reference as an optimization to avoid  the  overhead  of  stack
       copying.   The  reference  will not be stored in the Allegro library so it is safe to pass
       references to local variables.

              void setup_my_transformation(void)
              {
                 ALLEGRO_TRANSFORM transform;
                 al_translate_transform(&transform, 5, 10);
                 al_use_transform(&transform);
              }

       Parameters:

       • trans - Transformation to use

SEE ALSO

       al_get_current_transform(3alleg5), al_transform_coordinates(3alleg5)