GameMaker: Basic 3d bone animations

This example demonstrates how to create fairly basic bones for use in GameMaker 3d games fairly easily. Such can be used for character and environment animations, provided that they can be split in rotatable parts to some extent.


As you may know, GameMaker does not quite support vertex animations. That means that models have to be either composed on-fly (which is a slow method), or "baked" as a number per-frame models (which takes amounts of memory proportional to how smooth you want your animations look). Bone animations, on other hand, work fast (since only transformation calculations need to be done), and require small amounts of memory.


Idea of bone transformations is that you have so called bones, which can be attached to other bones, which makes them rotate together. That means, to find transformation matrix (position, rotation, and scale) of any given bone, you need to go through all of its "parent" bones, combining matrices. Normally this would be a slightly tricky task (especially if engine of choice does not have matrix operations built in), but, fortunately, GameMaker includes a set of functions to manipulate matrices (d3d_transform_).

Attached example includes a minimal system for linking bones together, drawing them, and a sort of procedural animation example.

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GameMaker: collision versus 3d array

Can be seen as a part of those block-building games

So, today comes with an example of collision between point, box, and line versus a 3d array.

3d array is presented as ds_list (z) with ds_grid's (xy).

Functions include management of this 3d array (creation, destruction, modification - no memory leaks included) and actual functions to check for different collisions.

All of these also include error handling, so attempting to check for collision outside the 'map' will threat area as 'air' (0) and not crash the game.

Also note that no optimization was applied to process of block rendering - you'd likely have to change that if basing game with large level on this example.

Download GMK