Pixel perfect collision detection using Cocos2d-x 4.0

cocos2d-x C++
#1

Hello. I know there’re already some similiar topics in this forum, but none of them gives the actual answer to the problem. I’ve been struggling with pixel perfect collision for 2 weeks now and I have absolutely no idea how to make it work properly. I would add that I had never programmed anything in OpenGL before. So my question is: does anyone have working code for pixel perfect collision detection using latest Cocos2d-x version?

#2

Isn’t the collision detection in cocos2d-x already pixel-perfect?

#3

Are you looking to do Physics. if so even box2d clamed it’s not to be pixel perfect, But i find it to be perfect i don’t find any problem with it,. problem is of overheld thinking like speed distance next step and so on calculating if its just 2 simple object…
cocos2dx has its own detection you can use…
//Cocos 3 or 4
const auto& boundingBox = item → getBoundingBox ( );
boundingBox . intersectsRect(Rect(0,0,20,20)); // your other object
or
boundingBox . intersectsCircle(Vec2(20,20),20); //Because don’t know the shape your working with

I will add this as a demo in my programs so people can test it.
Hop this help you out.

#4

Cpp-tests also demonstrates this many times.

#5

Could you possibly tell me in which exact file can I find an implementation of this?

#6

Any of the physics examples demonstrate this plus there are examples using containsPoint()

#7

Thanks a lot, but is there any other way of achieving pixel perfect collision detection without using the physics engine? In cocos 3.x versions I was using custom shaders to color sprites red and blue, then rendered them with ADDITIVE BlendFunc and finally read pixels with glReadPixels. I know a lot has changed since then (e.g OpenGL end of life on IOS), hence my question, is it still possible to implement something similar in the latest cocos version?

#8

Relatively using bounding box and containsPoint()