This is a small extension that allows you to combine multiple images into texture pages at runtime through a bin packing algorithm.
tpage = tex_page_create(1024, 1024);
one = tex_page_add(tpage, "one.png", 1, 64, 64);
two = tex_page_add(tpage, "two.png", 2, 64, 64);
tex_page_finalize(tpage);
// ... later, to draw:
tex_sprite_draw(one, 0, x, y);
tex_sprite_draw_ext(two, 1, x, y, 2, 2, current_time / 3, c_white, 1);tpage = new TexPage(1024, 1024);
one = tpage.add("one.png", 1, 64, 64);
two = tpage.add("two.png", 2, 64, 64);
tpage.finalize();
// ... later, to draw:
one.draw(0, x, y);
two.drawExt(1, x, y, 2, 2, current_time / 3, c_white, 1);See doc22.html and doc23.html in export directory.
- Install Haxe
- Install sfhx via
haxelib git sfhx https://github.com/YellowAfterlife/sfhx - Install sfgml via
haxelib git sfgml https://github.com/YellowAfterlife/sfgml - Do
haxe binpack.hxmlto compile all versions.
This will update all 3 GameMaker projects.
Since packing happens at runtime, the approach used is one of the simplest possible - the algorithm finds the first child-less rectangular node in the tree that can fit an image, marks it as a container for it, and divides it into three - now-image-sized node itself, and two children filling the remaining space:
+-------+ +---+---+
| | | E | |
| E | -> +---+ B +
| | | A | |
+-------+ +-------+
Split direction depends on remaining width/height after subtracting image size.
I do not know the algorithm name off-hand as this is loosely based on an example I made for someone in 2012.
Vadim "YellowAfterlife" Dyachenko