/*

     File: APLAnimatingSprites.m

 Abstract: 

 This scene shows how to animate a sprite through a series of textures.

  Version: 1.0

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 */

#import "APLAnimatingSprites.h"

#import "APLBasicSprites.h"

@interface APLAnimatingSprites()

@property NSArray* walkFrames;

@end

const int kDefaultNumberOfWalkFrames = 28;

const float showCharacterFramesOverOneSecond = 1.0f/(float) kDefaultNumberOfWalkFrames;

@implementation APLAnimatingSprites

- (void)createSceneContents

{

    self.walkFrames = [self animationFramesForImageNamePrefix:@"warrior_walk_" frameCount: kDefaultNumberOfWalkFrames];

    // Create the sprite with the initial frame.

    SKSpriteNode *sprite = [SKSpriteNode spriteNodeWithTexture:[self.walkFrames objectAtIndex:0]];

    sprite.position = CGPointMake(CGRectGetMidX(self.frame),

                                  CGRectGetMidY(self.frame));

    [self addChild:sprite];

    // Cycle through the frames.

    SKAction *animateFramesAction = [SKAction animateWithTextures:self.walkFrames

                                              timePerFrame:showCharacterFramesOverOneSecond

                                              resize:YES

                                              restore:NO];

    [sprite runAction: [SKAction repeatActionForever:animateFramesAction]];

    [self addSceneDescriptionLabel];

}

- (NSArray *)animationFramesForImageNamePrefix: (NSString*) baseImageName frameCount: (NSInteger) count

{

/* Loads a series of frames from files stored in the app bundle, returning them in an array. */

    NSMutableArray *array = [NSMutableArray arrayWithCapacity:count];

    for (int i = 1; i<= count; i++)

    {

        NSString *imageName = [NSString stringWithFormat:@"%@%04d.png",baseImageName, i];

        SKTexture *t = [SKTexture textureWithImageNamed:imageName];

        [array addObject:t];

    }

    return array;

}

- (void)addSceneDescriptionLabel

{

    /*

     Add a simple label that describes the scene.

     */

    SKLabelNode *myLabel = [SKLabelNode labelNodeWithFontNamed:@"Helvetica"];

    myLabel.text = NSLocalizedString(@"This sprite is animating through a series of texture images.", @"");

    myLabel.fontSize = 18;

    myLabel.position = CGPointMake(CGRectGetMidX(self.frame),100);

    [self addChild:myLabel];

}

@end