Need help with deprecated code(from box2d/Physics):

cocos2d-x
1

Hi!

I am about to do some physics in my game and I’m using a tutorial BUT when i use this code in cocos2d-x 3.7 it says that there’s no member named “Step” and/or “ClearForces” Please take a look: [code] static double UPDATE_INTERVAL = 1.0f/60.0f;
static double MAX_CYCLES_PER_FRAME = 5;
static double timeAccumulator = 0;

timeAccumulator += dt;
if (timeAccumulator > (MAX_CYCLES_PER_FRAME * UPDATE_INTERVAL)) {
    timeAccumulator = UPDATE_INTERVAL;
}

int velocityIterations = 3;
int positionIterations = 2;
while (timeAccumulator >= UPDATE_INTERVAL) {
    timeAccumulator -= UPDATE_INTERVAL;
    sceneWorld->Step(UPDATE_INTERVAL,
                 velocityIterations, positionIterations);
    sceneWorld->ClearForces();

//The sceneWorld initializing:
cocos2d::PhysicsWorld* sceneWorld;
}[/code]
What can i use instead of these functions?
Thanks! i appreciate ur time!

Update: @slackmoehrle, do u have suggestions? I mean, I know u are in with this so…Or anybody_

2

Why is Step() with a capital s? There is a step() api call.

1 Like
3

No, it does;t exist neither and btw, i don’t think it’s box2d because objects like bodies are initialized using “PhysicsBody” and not like how you usually do it when using box2d? So, how can i receive the same function? :*(
Thanks, i’d appreciate just a reply, thanks again!

4

Where am I misunderstanding what you need?

http://www.cocos2d-x.org/reference/native-cpp/V3.6/d8/d63/classcocos2d_1_1_physics_world.html#ad75be22d5235e784dfe619bed84f977f

5

Ok wait, let me try once again…
Thanks!

6

Oh yea @slackmoehrle, i got, it can now find the function but i try to use it, it says that it can’t have 3 arguments but i can’t get what i want without them?

7

Ok thanks, igot that…But i can’t receive the same output when i can only use 1 argument and not three as the old code?
Please help, i appreciate your time!

8

Sorry, can you clarify a bit, you need the 3 arguments you were passing to Step()? And step() you can’t accomplish this.

9

The built in physics in Cocos2D-x is not Box2D. However box2D does come provided in the Cocos2D-x library. You can access it by including the header files for it with this line.

#include "Box2D/Box2D.h"

If you’re following a Box2D tutorial then you should be using Box2D physics.