Odd tile collision problem

[suitcasenuke]

I'm not even sure how to categorize this strange thing. I've attached a gif of what's happening. It seems like collisions between the player and tiles is off somehow. The puff of smoke is only supposed to appear when the player hits the ground after a jump. But it's as though not all tiles are treated the same way. I can move around and the problem disappears. Also, just changing the tile layout (in this case just moving the tile wall one tile to the left) solved the problem.

[rob1221]

Do you happen to also have a sensor collision shape on that actor?

[suitcasenuke]

Nope, just one solid shape. I don't know if this is related, but this seems to only occur within the first 10-20 tiles of a scene.

[Justin]

Have you enabled debug drawing to see if the tile collisions look differently than expected?

• Status changed from New to Need Info

[suitcasenuke]

I just quickly created a fresh scene and attached the results with debug drawing on. Very odd.

[rob1221]

Can you attach a sample game showing the problem?

[rob1221]

What's happening here is that certain layouts of tiles is causing your actor's Y speed to be very slightly below 0 (as an example, 5.55111512312578e-17).  I'm still trying to narrow down why this is happening, and maybe it's a quirk with box2D, but for now you can adjust your code to check for y speed < 0.01 instead of 0.

• Status changed from Need Info to Confirmed

[suitcasenuke]

Thanks! That's an odd one.

 tiles.gif (1986 kB, 456x312 - viewed 2652 times.)

 Mar-24-2018 05-20-04.gif (5993.64 kB, 640x474 - viewed 2429 times.)