Well, first of all I have done this in different ways but right now I am trying to implement it with SAT. Before I start let me set two points clear:

• Separating Axis Algorithm is working flawless, both Swept method (TOI etc)and Discrete(Normal MTV) (I have written a article on it, with a tutorial , soon to be posted for all to use/read)
• I can implement this in a hacky way with a crap ton of sensors around the player., by this I mean around 8.

So my question is, if I wanted to implement a movement like in the sonic Hedgehogs games for genesis using SAT how you go about it?

I have done this before with using sensors around the player to calculate slopes and all the other collisions, I could do it like this again, but I feel this way is hacky, I mean, using SAT I get somewhat a simplified 3D collision system, meaning I have access to normal of the polygons, their vertices, MTV, estimated time of impact, estimated time the polygon will leave (think bullets), etc.

I though of using the normal of the polygon the character is standing but it doesn't seem to want to work decently. I guess I want to find a aproach without using a sensor for each direction, bot, top, left,right angle, main.

So even if you don't know how to handle slopes like sonic does, SAT collision how would you do it in a simple movement way without using sensors, but still getting enough info to know where the collision is and stuff like that (This might trigger some ideas on my side, sinse I already know how to do this, your way might make see another perspective anyway).

Any insights would be greatly appreciated...

Sincerely Morphex.

How is your collision-response system set up, and what about it isn't working?

Also, what exactly is "movement like in the sonic Hedgehogs games"? What about it are you trying to emulate?

I though of using the normal of the polygon the character is standing but it doesn't seem to want to work decently.

It does it ok, but I trying to figure out how to do it "correctly", yeah I was talking about loops and any angle slopes. I can do it "exactly" like sonic but I use a a lot of sensors and I don't think it feels ok (its not the correct way). I am actually thinking on how to do the algorithm, I have no "really physics applied just a way to detect correct collision with the info I stated, I want to see if someone has a better idea than those of the sensors.

I wonder, did Sonic actually do a sort of cable-like contact (causing the player to "swing" around the center point as though attached to a cable (maximum distance but no minimum distance)) while the player was actually inside the loop? That would get pretty perfect results, I should think, because as I recall if you weren't moving fast enough you could just sort of jump through the loop-de-loop.