/*

     File: APLResizingSprites.m

 Abstract: 

 This scene shows how to resize sprites. It shows how the centerRect property can be used to change how the texture

 is scaled and applied to the sprite.

  Version: 1.0

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 */

#import "APLResizingSprites.h"

#import "APLSpriteAnchors.h"

@implementation APLResizingSprites

- (void)createSceneContents

{

    [self addResizingSprites];

}

- (void) addResizingSprites

{

    /*

     Creates a pair of sprites. One uses the default scaling behavior, and the other uses

     a custom center rect. The corners of the UI button are a fixed size, and the remaining

     part of the texture is scaled.

     */

    SKTexture *texture = [SKTexture textureWithImageNamed:@"stretchable_image.png"];

    SKAction *resizeSpritesAction = [self newResizeSpriteAction:texture];

    SKSpriteNode *defaultSprite = [[SKSpriteNode alloc] initWithTexture:texture];

    defaultSprite.position = CGPointMake(CGRectGetMidX(self.frame)-192, CGRectGetMidY(self.frame));

    [self addChild:defaultSprite];

    [defaultSprite runAction: resizeSpritesAction];

    [self addDescription:NSLocalizedString(@"Resized with default stretching", @"") toSprite:defaultSprite];

    SKSpriteNode *customSprite = [[SKSpriteNode alloc] initWithTexture:texture];

    customSprite.position = CGPointMake(CGRectGetMidX(self.frame)+192,CGRectGetMidY(self.frame));

    // the center rect calculation is always based on the artwork. In this case

    // the artwork is a 28 x 28 pixel image with a 4 x 4 pixel stretchable center.

    customSprite.centerRect = CGRectMake(12.0/28.0,12.0/28.0,4.0/28.0,4.0/28.0);

    [self addChild:customSprite];

    [customSprite runAction: resizeSpritesAction];

    [self addDescription:NSLocalizedString(@"Resized with custom stretching", @"") toSprite:customSprite];

}

- (SKAction *)newResizeSpriteAction:(SKTexture *)texture

{

    /*

     Creates and returns an action sequence that resizes a sprite through a variety of sizes.

     It then returns the sprite back to its normal default size. 

     */

    SKAction *sequence = [SKAction sequence:@[

                             [SKAction waitForDuration:1.0],

                             [SKAction resizeToWidth:192 height:192 duration:1.0],

                             [SKAction waitForDuration:1.0],

                             [SKAction resizeToWidth:128 height:192 duration:1.0],

                             [SKAction waitForDuration:1.0],

                             [SKAction resizeToWidth:256 height:128 duration:1.0],

                             [SKAction waitForDuration:1.0],

                             [SKAction resizeToWidth:texture.size.width height:texture.size.height duration:1.0]

                          ]];

    return [SKAction repeatActionForever:sequence];

}

- (void)addDescription: (NSString*) description toSprite:(SKSpriteNode *)sprite

{

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

    myLabel.text = description;

    myLabel.fontSize = 18;

    myLabel.position = CGPointMake(0,-128);

    [sprite addChild:myLabel];

}

@end