Animate a sprite

[imrnm245]

Hi, im creating an app similar to doodle jump where my main sprite has a negative acceleration and a positive velocity whenever it touches the platforms, and i want to animate the sprite as it hits the platform, but i have no idea how to go about doing that. Can anyone give me some suggestions?

[ChrisMayer]

Assuming your sprite is a UIImageView:

myImageview.animationImages = [NSArray arrayWithObjects:[UIImage imageNamed:@"frame_1.png"],[UIImage imageNamed:@"frame_2.png"],nil];
myImageview.animationDuration=0.5;myImageview.animationRepeatCount=0;[myImageview startAnimating];

where animationDuration=0.5 is the total duration of the animation in seconds.

[imrnm245]

Originally Posted by ChrisMayer

Assuming your sprite is a UIImageView:

myImageview.animationImages = [NSArray arrayWithObjects:[UIImage imageNamed:@"frame_1.png"],[UIImage imageNamed:@"frame_2.png"],nil];
myImageview.animationDuration=0.5;myImageview.animationRepeatCount=0;[myImageview startAnimating];

where animationDuration=0.5 is the total duration of the animation in seconds.

i tried that, but i dont know where to declare the myImageview. Also, what would happen if my sprite wasnt a UIImageView? something like:

AtlasSpriteManager *spriteManager = (AtlasSpriteManager*)[self getChildByTag:kSpriteManager];
AtlasSprite *one = (AtlasSprite*)[spriteManager getChildByTag:kOne];

[ChrisMayer]

Ah, you're using cocos2d. Unfortunatly I've no experience with that, I usually do everything the manual way.

[imrnm245]

Also, in cocos2d i have a case statement to display the different platforms, but i want one of these cases to have a different value for the velocity of the sprite, so how would i go about doing that?

[rahul7star]

you can use this to animate a sprite
id animation = [MoveBy actionWithDuration:2.0 position:ccp(-100, 0)]; // Make the animation MoveBy tells the sprite to move "so many pixels" from it's current position
[sprite runAction: animation]; // Tell the stickman to do the animation


though i am looking for animate a spirte sheet (having two images 1 at 0,100 and toher at 10,100)

[imrnm245]

Those are all good answers, but thats not exactly what im looking for. Let me try it another way:

I initialized an AtlasSprite in my (id) init, which is my main sprite

Then in (void) jump, i want to take that same sprite, but i want to animate it with an array of images. The images i want to animate it with are called 2.png, 3.png, 4.png, and 5.png. Here is some code:



- (id)init {

AtlasSprite *one = [AtlasSprite spriteWithRect:CGRectMake(608,-7,60,70) spriteManager:spriteManager];
[spriteManager addChildne z:4 tag:kOne];
}


- (void)jump {
one_vel.y = 550.0f;
//This is where i want to animate "one" with an array of images called //2.png, 3.png, 4.png, and 5.png
//Also, how would i declare the atlas sprite used above in (void) jump?
}

[imrnm245]

i ran into another problem also. In the code below i have initialized 3 platforms, and this code works, but i want to add a special feature to the case 2 platform. I want to make an if statement saying that if my sprite touches it, the sprite's velocity will be different, but i tried all the ways i can think of and have no idea how to continue.

- (void)initPlatform {

CGRect rect;
switch(random()%3) {
case 0: rect = CGRectMake(633,83,64,13); break;
case 1: rect = CGRectMake(633,139,65,14); break;
case 2: rect = CGRectMake(725,80,78,16); break;



}

[rahul7star]

try this
id anim = [[Animation alloc] initWithName:@"fight" delay:0.1];
[anim AddFrameWithName:@"goblin_swing_01"];
[anim AddFrameWithName:@"goblin_swing_01"];
[anim AddFrameWithName:@"goblin_swing_02"];
[anim AddEvent:@"something"];
[anim AddFrameWithName:@"goblin_swing_03"];
[anim AddFrameWithName:@"goblin_swing_02"];

[someSprite runAction:[Animate action:anim withDelegate:self]];

[imrnm245]

thank you very much! That code you provided works perfectly! but i still need help with my second question...

[imrnm245]

Anybody know?

[imrnm245]

bump
please help me, i have no clue what to do still