Jump Thru / Platform Positive X Movement

I've noticed a weird issue with the Jump Thru behavior. If a platform sprite is at a standstill to the left of the jumpthru tilebg without overlapping another the platform sprite needs to accelerate to a certain speed in order to move past it, but only if the platform sprite is moving right.

When moving left from a standstill the platform sprite passes through as expected. If the platform sprite is already overlapping a jumpthru tilebg then it will pass through all other subsequent instances as expected. It only occurs when not already overlapping a jumpthru tilebg.

Example Capx

http://dl.dropbox.com/u/20459682/platform_bug.capx

Just get as close to the left side of the either of the teal platforms, and then press right. You'll notice a hesitation followed by a "pop" as you move past it. I assume it's because you're still accelerating even at a standstill, and once the platform sprite hits a certain speed it passes through.

I assume this is a bug due to the inconsistencies mentioned above.

I think I found a way to improve it but it's hard to tell since it's quite a subtle effect. Can you try this improved runtime.js for the Platform behavior and let me know if it's better?

https://dl.dropbox.com/u/15217362/platform-r94.zip

Whatever you did fixed the bug I reported. I noticed one other thing, but it's only noticeable at a low resolution, and not as gameplay effecting so much as visual.

When landing in my example, the platform sprite sometimes land about a pixel or a half pixel into the jumpthru tilebg, but when the platform sprite overlaps another jumpthru tilebg it jumps to the proper elevation. I thought it might be dependent on speed, but I tried raising the values to see if there was a notable difference but it appeared to have no effect on the outcome.

Like I said, that quirk there seems rather low priority, and probably will only effect lo-res retro games like mine and only visually really.

The original bug appears to have been squashed though, so awesome awesome awesome! <img src="smileys/smiley4.gif" border="0" align="middle" />

...I noticed one other thing, but it's only noticeable at a low resolution, and not as gameplay effecting so much as visual...

When landing in my example, the platform sprite sometimes land about a pixel or a half pixel into the jumpthru tilebg...

...Like I said, that quirk there seems rather low priority, and probably will only effect lo-res retro games like mine and only visually really...

I'm experiencing this bug at R90 - that is not only visual. I have several jumpthru panels, so when you are 1-2 pixels overlapping jumpthru you can fall through their joint point.

And I also experiencing the bug with moving right through jumpthrus and stucking (but not always)

The platform behavior only works to the nearest pixel. Try enabling pixel rounding in project properties so objects never appear at half-pixel increments.