I'm working on a pretty basic 2d platformer and I'm wondering if I could get advice on an issue I've run into. To keep collision detection simple I'm using AABBs and separating axis tests for collision detection and this works fine for most cases. The problem is that when something is moving too fast my algorithm gets confused and returns a bad correction.
For example; the hero stands at the very edge of a platform (1-5px from the edge) and jumps. When the hero falls back down to the platform he travels through the platform (> 5 pixels) and then my collision detection moves him beside the platform and the hero falls to his doom. I understand the reason - being on the edge of the platform the hero is penetrating the object more on the y-axis as it its the x-axis and I'm choosing the smaller distance to correct by.
The immediate answer me is to change my movement code so it does multiple tests for a few locations between the objects start and end position but the OCD bit of my brain complains about wasted cycles etc...
Before I start gutting my code I was wondering if there was a more elegant way to solve this problem? Am I wrong in my assumptions? Have I managed to bugger up AABB SAT tests? Should I use a different algorithm?
Thanks in advance.