al_draw_rotated_bitmap3alleg5
Allegro 5 api
Usage
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#include <allegro5/allegro.h> void al_draw_rotated_bitmap(ALLEGRO_BITMAP *bitmap, float cx, float cy, float dx, float dy, float angle, int flags)
Overview
Draws a rotated version of the given bitmap to the target bitmap. The bitmap is rotated by `angle' radians clockwise.
The point at cx/cy relative to the upper left corner of the bitmap will be drawn at dx/dy and the bitmap is rotated around this point. If cx,cy is 0,0 the bitmap will rotate around its upper left corner.
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cx - center x (relative to the bitmap) |
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cy - center y (relative to the bitmap) |
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dx - destination x |
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dy - destination y |
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angle - angle by which to rotate (radians) |
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flags - same as for al_draw_bitmap(3alleg5) |
Example
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float w = al_get_bitmap_width(bitmap); float h = al_get_bitmap_height(bitmap); al_draw_rotated_bitmap(bitmap, w / 2, h / 2, x, y, ALLEGRO_PI / 2, 0);
The above code draws the bitmap centered on x/y and rotates it 90° clockwise.
See al_draw_bitmap(3alleg5) for a note on restrictions on which bitmaps can be drawn where.
Releases
6 releases since Debian 8 (Jessie); the text changed 5 times.