Gamejam Devlog - Timedust v0.0.41 - Suspended Trap

3 years ago by Imogia Games (@imogiagames)

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Ok today, a word about the suspended trap and how I did it.
With the experience I gained from the gameje, I discovered a better and more practical way to do this. But at the time, I was in the rush of the game jam, so I had to move in order to not get stuck too long on an issue.

So, for those traps, I used a combination of the the animation nodes: an AnimatedSprite2D for changing the sprite, and an AnimationPlayer for changing the collision mask.
I used one CollisionShape 2D and I changed its shape on each frame to match the animation.

Timedust devlog suspended trap

Two animation nodes for the same object

The main issue I encountered is that I use the AnimatedSrpite2D speed property to set my default animation speed. (Then the Timedust effect slows that speed). However, I couldn't do the same with the AnimationPlayer node: the collision mask animation wouldn't follow the sprites.
So I had to do some research in order to have control on the speed of the AnimationPlayer, so I could synchronize it with the sprites animation speed.
I had to go through trial and error to eventually find the maths that match perfectly the sprite animation.
So it worked in the end, but later in the jam, when I worked on the animated spikes, I found another way that I think is maybe more adapted:
using different CollisionMasks, hiding and unhiding them depending which animation frame is currently playing.

Timedust devlog animated collision mask