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al_build_transform(3alleg5) al_build_transform(3alleg5)

NAME

al_build_transform - Allegro 5 API

SYNOPSIS

#include <allegro5/allegro.h>
void al_build_transform(ALLEGRO_TRANSFORM *trans, float x, float y,


   float sx, float sy, float theta)

DESCRIPTION

Builds a transformation given some parameters. This call is equivalent to calling the transformations in this order: make identity, rotate, scale, translate. This method is faster, however, than actually calling those functions.

Parameters:

•
trans - Transformation to alter
•
x, y - Translation
•
sx, sy - Scale
•
theta - Rotation angle in radians

Note: this function was previously documented to be equivalent to a different (and more useful) order of operations: identity, scale, rotate, translate.

SEE ALSO

al_translate_transform(3alleg5), al_rotate_transform(3alleg5), al_scale_transform(3alleg5), al_compose_transform(3alleg5)

Allegro reference manual