I have a game engine created in javascript (https://jsfiddle.net/4gqsq8wf/) which uses collision detection via the Separating Axis Theorem. Currently, it does not have any means of resolving velocity upon the impact of multiple objects. Many posts have stated on this site that the post-collision velocity of an object is simply the angle of reflection. (For example: http://stackoverflow.com/questions/573084/how-to-calculate-bounce-angle) However, this requires knowing the angles of the surfaces contacting each other. I don't know how to figure out these, as the function I wrote only calculates the Minimum Translation Vector; how would I find the polygon faces involved in a collision?

Layman's terms would be appreciated.

Edit: Would this be the collision normal?

I have a game engine created in javascript (https://jsfiddle.net/4gqsq8wf/) which uses collision detection via the Separating Axis Theorem. Currently, it does not have any means of resolving velocity upon the impact of multiple objects. Many posts have stated on this site that the post-collision velocity of an object is simply the angle of reflection. (For example: https://stackoverflow.com/questions/573084/how-to-calculate-bounce-angle) However, this requires knowing the angles of the surfaces contacting each other. I don't know how to figure out these, as the function I wrote only calculates the Minimum Translation Vector; how would I find the polygon faces involved in a collision?

Layman's terms would be appreciated.

Edit: Would this be the collision normal?

I have a game engine created in javascript (https://jsfiddle.net/4gqsq8wf/) which uses collision detection via the Separating Axis Theorem. Currently, it does not have any means of resolving velocity upon the impact of multiple objects. Many posts have stated on this site that stated that the post-collision velocity of an object is simply the angle of reflection. (For example: http://stackoverflow.com/questions/573084/how-to-calculate-bounce-angle) However, this requires knowing the angles of the surfaces contacting each other. I don't know how to figure out these, as the function I wrote only calculates the Minimum Translation Vector; how would I find the polygon faces involved in a collision?

Layman's terms would be appreciated.

I have a game engine created in javascript (https://jsfiddle.net/4gqsq8wf/) which uses collision detection via the Separating Axis Theorem. Currently, it does not have any means of resolving velocity upon the impact of multiple objects. Many posts have stated on this site that the post-collision velocity of an object is simply the angle of reflection. (For example: http://stackoverflow.com/questions/573084/how-to-calculate-bounce-angle) However, this requires knowing the angles of the surfaces contacting each other. I don't know how to figure out these, as the function I wrote only calculates the Minimum Translation Vector; how would I find the polygon faces involved in a collision?

Layman's terms would be appreciated.

Edit: Would this be the collision normal?