I've created a SpriteKit Scene with physics bodys. This is working quite well. I'm also scrolling the scene around, using the Apple best practice with a "camera node". My scenes node tree is like ...

I have a strange memory leaks when creating Sprite Kit physics bodies with custom shapes. This is how my implementation looks: CGFloat offsetX = self.frame.size.width * self.anchorPoint.x; CGFloat...

From the image above, given an initial position of b0(x, y), an end position of b1(x, y) and positions a(x, y) and c(x, y). How can I predetermine if square B0 will move from b0(x, y) to b1(x, y) ...

The following fluid simulation is a translation of a paper by Stam. Something truly terrible has happened. Each time the program is run with a low DIFF=0.01, the values start off small and then rap...

I have a SKSpriteNode with a dynamic physics body on a SKNode *_fgLayer. Now, when I pause or unpause the game I want that SKSpriteNode to remain in place and not rotate or fall down. If I simply ...

I currently have a ragdoll figure, which consists of a parent node (with no physics bodies attached), and lots of child nodes which each consist of a circle body. The circles are connected to each ...

Let's say I have a SKSpriteNode that represents a car wheel, with a circular SKPhysicsBody successfully attached to it. The genre would be sideways scrolling 2d car driving game/simulator, obviousl...

I am using SpriteKit to shoot a projectile. The projectile node is given an impulse using -(void)applyImpulse:(CGVector)impulse. I want to calculate the distance the projectile will fly before hi...

I'm taking the following approach to animate a star field across the screen, but I'm stuck for the next part. JS var c = document.getElementById('stars'), ctx = c.getContext("2d"), t = 0; // ti...

I want to move a SKSpriteNode on the Y-Axis. The SKSpriteNode called Player has no Velocity.The Player can only jump if a Platform is in contact. Everytime the Screen is touched, I want to give th...

I've got a coin RigidBody and walls around it with box colliders. For trial purpose I've applied the following code to the coin. private void OnMouseDown() { rigidbody.AddForce(30.0f, 0f, 5.0f, ...

I'm trying to use a quadtree for 2D collision detection, but I'm a little stumped on how to implement it. First of all, I'd have a quadtree which contains four subtrees (one representing each quadr...

What I'm looking for I have 300 or fewer discs of equal radius on a plane. At time 0 each disc is at a position. At time 1 each disc is at a potentially different position. I'm looking to generate...

Hi I'm trying to fix this bug with spritekit's physics shape appearing upside down. [SKPhysicsBody bodyWithTexture:monsterTexture size:monsterTexture.size] The first time the monster appears the...

I am writing a physics engine and having a hard time figuring out a good way to design my data storage. The functionality that I want: Have a class that represents a PhysicsBody Have a class th...

I am wondering how app developers create games with 3D animations and graphics. Does anyone know how those games are made, and can it be done with android studio?

Found a lot of physic engines out there but nothing that fit my needs directly. I try to to find a simple way to push and pull boxes including collision detection which respects the next neighbori...

I have ball that is bouncing around the scree, something like pong. Radius of ball depend on the with of screen. I have found that ball is not going with same speed on iPhone and iPad. Because bal...

Hopefully someone can help. I have been pulling my hair out on this one! Below is some of the control pad code from my Sprite Kit game which uses applyForce to move the hero ship. I like how the co...

Important note: this question has utterly no relation to "PhysX", which is a computer-game-physics system (useful for the physics in arcade games such as ball games, etc); PhysX is a system built-i...

I want to create a rope like the one that is shown in this video. What is the best way to develop a rope like this? I've already tried to start and I think the best way to do it, is to make many l...

is it possible to use applyAngularImpulse but not exponentially increase the speed of the wheel? Ideally I'd like to have the wheel follow my finger, but setting node.zRotation += atan2f(y2-y1, x2-...

There are a lot of discussions of how MotionEvent.getX/.getY are "unreliable" (or other terms) and that we should use the Raw versions of these calls to get coordinates. On my Nexus 7, I have disc...

I am using Swift and Sprite Kit to develop a game on XCode Beta 6. In order to detect if all nodes are sleeping, i check their physicsBody.resting property. In update method i print out the result...

I'm a complete newbie when it comes to game development and I need someone to point me to the right direction. For the sake of clarity please consider the following animation. Basically I n...