GHZ crumbling platforms

[Otukuoi]

How would I change the collision of an object? I'm trying to make a GHZ esque sloped crumbling platform and I haven't figured out a way, even after looking through the code.

[TrianglyRU]

Use a sprite multiple of 16 on each axis (because it's split to 16x16 tiles when the floor collapses), inherit your object from obj_falling_floor_basic, override the create event and then use obj_set_solid_sloped function to set its solidbox

Basically see how obj_falling_floor_tsz is inherited from obj_falling_floor_basic. Since it is not sloped it does not override the create event and uses CollisionWidth and CollisionHeight assigned in Variable Definitions. But since you need a custom solidbox, you should override the event

[Otukuoi]

Very late to this, but what exactly are you referring to when you say "sprite multiple of 16"? I'm not good with coding collision-related things as all so my bad lol

[TrianglyRU]

The platform collapses into the small 16x16 sprites. Therefore, the sprite's width and height should be a multiple of 16px

[Otukuoi]

It crashes upon startup. I'll be honest, it's likely because I do not fully understand the obj_set_solid_sloped function. How exactly would I use it? Looking at the wiki certainly doesn't give me a clear idea.

[TrianglyRU]

heightmap - Array<Real> - An array of numbers representing the height at various points.

The array defines the vertical shape of the object, and its length determines the horizontal span over which collisions are calculated. The "centre" of the array is aligned with the sprite’s origin on the X-axis. Each element represents the height along the Y-axis at a specific horizontal offset from the origin

I honestly don't know how to explain it better. You can experiment with heightmap in Sol's GHZ collapsing ledge object with solidbox visualization enabled, so you can see what you're doing. Hopefully, that will help you understand what's going on