I want my player to move only on these platforms. How can I do it in SpriteKit?
I tries to use NavigationGraph, but no luck with it.
So, what I've done. I set a physicsBody for walkable objects to Alpha Mask, turned of gravity, set categoryBitMask to 1.
Then I check if a person clicked on one of my object, if yes, player moves there.
There was another problem with detecting if my physicBody was touched. To do that I've used this code
self.physicsWorld.enumerateBodies(at: touchLocation) {body,stop in
if (body.categoryBitMask == 1)
{
print ("yes")
}
}
Related
I am attempting to move a SKEmitterNode to follow a bullet in my game to give it a trailing effect however, no matter which way I attempt to implement this, it doesn't seem to work how I want it to and I'm at a loss for how to make this.
I have attempted to add the emitter to my main scene and manually moved the node a few times per second but it ends up not leaving a trail and keeping all the particles in one place like this:
Next I attempted to set the target node, however when I do this the trail goes for a bit then stops rather than following the bullet like it's supposed to. It also rotates and distorts from the rotation of the projectile like shown here:
For reference of the type of effect I'm looking for:
You should populate the targetNode property of your emitter with a node that is not moving like the scene.
emitterNode.targetNode = self // where self is the current scene
I have two SKSpriteNode-s(let's call them SKSPriteNode A and SKSpriteNode B), A is my hero sprite and B is a scene element, and sometimes, the didBeginContact fires off when they collide and sometimes it doesn't. A has physicsBody set based on texture and B has rectangle based physicsBody set for it. I can see their textures collide and intersect but I don't see the NSLog fire off in the didBeginContact. This is not totally consistent because another time they collide and the contact event fires off just fine. I need this to be consistent, naturally. Anyone has a suggestion on this issue? The scene is the only contact delegate for the physicsWorld, so only the scene can trigger and go in the event handler, so I know it is working - at least some of the time. Code in scene:
-(void)didBeginContact:(SKPhysicsContact *)contact {
NSLog(#"Contact happened!!!!!! :) ");
}
I have my custom class StaticLevelElement set so it extends SKSpriteNode:
#interface StaticLevelElement : SKSpriteNode
The B has been set as StaticLevelElement with a triangular image:
StaticLevelElement * B = [StaticLevelElement spriteNodeWithImageNamed:#"triangle"];
I tried to set the B's physicsBody to have texture based physicsBody:
B.physicsBody = [SKPhysicsBody bodyWithTexture:[SKTexture textureWithImageNamed:#"triangle"] size:B.size];
and I have the same result - intermittent contact, fires off occasionally, and not really consistent. Same happens if I set the B to have rectangle based physicsBody:
B.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:B.size];
It is my opinion and I can say that with a medium level of certainty, that the anchorPoint caused this. I had it set to (0.5, 0) and that seemed to had caused this issue by, apparently, moving the whole physicsBody, which I dont like at all. Once I deleted this manual setting of anchorPoint (and thus returning it to (0.5, 0.5)), the contact looks like happening more or less properly. Still not perfect - not triggering for every time the overlap happens, but I think much better. As I said, I am still not completely clear on when does contact happens and how the anchorPoint influences it, but looks like it is.
I am creating a 3rd person action game where the player is a helicopter and he can shoot other objects while moving. The problem is I am trying to find the enemy objects who are inside a circle in the center of the camera and I need to track them and shoot them.
Raycast wouldn't help as i need a thicker raycast and so I tried spherecast and capsulecast.
I have a GUI element which gives the player idea on where he can shoot.When using Spherecast or Capsulecast, It is working when the enemy is near but when the enemy is far behind I guess the spherecast becomes small while traveling along z and doesn't hit the object most times.
if (Physics.SphereCast (startPoint, 1f, transform.forward, out hit)) {
if (hit.collider.CompareTag ("Shootable") ){
Debug.Log(hit.collider.name);
Destroy(hit.collider.gameObject);
}
}
I have seen raycast from camera and so i was wondering if there is something to do like circlecast from the camera which would be appropriate for this. If not how can I proceed?
Any help is really appreciated.
If you want to detect whether enemies lie within a conical area in front of your camera, using a SphereCast or RayCast will not be able to meet your needs.
Instead, you might consider checking the angle between an enemy's relative position and your camera's forward vector, to see if it is below a particular value, and hence within the cone.
For a 60-degree field of view, and assuming you store your enemy Transform components in an array/List, your code might look like:
foreach (Transform enemy in enemies){
if (Vector3.Angle(transform.forward, enemy.position - transform.position) < 30){
Destroy(enemy.gameObject);
}
}
Hope this helps! Let me know if you have any questions. (Answer adapted from this Unity question.)
Creating a game like Doodle Jump where my player is constantly being moved up by bouncing off of obstacles. Ive tried every trick in the book but nothing seems to be working/doing exactly what I want. Can anyone give me some tips?
iOS 9 introduced the Camera Node. Use SKCameraNode, which is a subclass of SKNode, and can be translated and rotated in same way.
So, instead of moving all of your background elements in the opposite direction of your hero/player, you can simply attach your scene's camera node to your hero/player and the rest is taken care of.
PS. You can also do cool stuff like scaling the camera size.
EDIT.
Happy to include an example.
First, make a camera constant in your scene.
import SpriteKit
class myFirstScene: SKScene {
let myCamera: SKCameraNode = SKCameraNode()
...
}
Then in your didMoveToView() function, assign the scene's built-in camera variable to the camera constant we made earlier.
override func didMoveToView( view: SKView ) {
camera = myCamera
...
}
Now, there are a few different ways to "attach" your camera to your hero/player. The first is to attach your camera node to your hero.
hero.addChild( myCamera )
I don't even know if it works that easily because my game uses something different, a simpler version is below.
update(){
camera!.zRotation = hero.zRotation
camera!.position = hero.position
}
Dear all,
I have an application that uses cocos2d spacemanager with gravity set to a specific value.
If i want to make a shape in the middle of the screen it will fall down to the floor, if i set the gravity to zero all other object will not move as supposed, if i use a second spacemanager and set its gravity to 0 i cant detect collision between objects from different spacemanagers. how can i add a shape that wont fall down in the middle of the screen and detect its collision while other objects behave correctly according to the gravity set.
Also a question is, should i use shapes (Circle, rectangle, ... etc) with spacemanager and if i want to use a ccsprite (image) i should put it in a shape or i can use the sprite alone (e.g. a tree is not a rectangle or circle collision and reflection wont be natural how can i do this).
regards
Every shape has a property called mass. If you want a shape to be static and respond to collisions just set mass to STATIC_MASS like this:
cpShape *ball = [smgr addCircleAt:cpv(440,70) mass:STATIC_MASS radius:10];
to ad an image, do that:
cpShape *ball = [smgr addCircleAt:cpv(440, 70) mass:STATIC_MASS radius:10];
[super initWithShape:playerShape file:#"ball.png"];
If this doesn't work, set up a cpCCSprite in it with a shape.
You can search for cpCCSprite on google, im sure you'l find something :)