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[Armok]

whats wrong with polygons?

[Outcast Orange]

If they are moving too fast, they go through each other.
And by too fast, I mean fast enough to pass one of the shape boundaries.

[Armok]

thats not a good enoguth reason to go all rectangles.

[Outcast Orange]

You didn't bother to offer an alternative.

I don't know the math for polygon containment and predicted paths.
Rectangles are far easier to deal with in those respects.
They are just boxes.
No angles, no diagonal distances, just algebra.

[Siquo]

You could use both. Check outer rectangle that contains the whole polygon. Did it hit? Start checking polygon. If polygon is a miss, check inner rectangle (contained by the polygon) to check for overshoots. Still a miss? then you either hit a small corner that the polycheck missed, or you missed it completely. Not failsafe but better than just rectangles.

[Armok]

you had a wiki page for the math.

[Outcast Orange]

I improvised slightly.

That page uses matrix transformation.
I don't understand the math behind that, so I didn't even try coding it.

Point vs Segment
 Here is how mine works:

Point A and line segment L M

If A is within rectangle L M,

and Slope( A L ) ~= Slope( L M )     << Genius (but not mine)

Point A contacts segment L M at A.

Not only do you know that there is a collision, but WHERE.

[Armok]

OO, you CANNOT expect to program something like this without being prepared to learn some new math.

[eerr]

Maybe it's safer to stay in the realm of easy math?

[Outcast Orange]

Meow!

After retreating into the realm of rectangle constructions, I've made some awesome progress.

Using composite objects, I can make a variety of boxy creations.

Here are some screens:

Spoiler (click to show/hide)

Take note that those two tiny squares are part of the same object, and move together.

See how they can fall on either side of the pole-tree-thing and not collide with it?

The movement and jumping seem decent enough, but I need to fix a few flaws.
I'll throw out a running demo once it's more polished.

[Org]

Nice.

[Outcast Orange]

Major wonderful success.

I've got sprites working and loading, and its starting to look like a real game.
I need to code in some standard area-loading function, and slap together a demo level to climb around.
I suppose that will only take a couple hours.
I suppose you can look forward to some really basic platforming action.

I don't know how to deal with frame rate, so if anyone wants to guide me through it, or make me some sample code,
 I'd be very pleased.

[Outcast Orange]

Here is a screenshot:



And here is the link:
Platform Explorer Demo A

I'll upload some concept art soon.

EDIT: Beware of frame rate shenanigans.

[Org]

Trying now.

:<
And accept my Steam friend request.

[Outcast Orange]

This version has a bit more going on:

Platform Explorer Demo B

Foreground stuff and some animation.