GameDevHelperAPI-Cocos2d/GameDevHelperAPI/GHBoneSkin.mm at 967b5f297fb1791f8c847983cf4466404276e752 · vladubogdan/GameDevHelperAPI-Cocos2d · GitHub

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//
//  GHBoneSkin.m
//  cocos2d-ios
//
//  Created by Bogdan Vladu on 4/5/13.
//
//

#import "GHBoneSkin.h"
#import "GHBone.h"
#import "GHSprite.h"
@implementation GHBoneSkin
@synthesize positionOffset, angleOffset, connectionAngle, name, uuid;

-(id)initWithSprite:(GHSprite*)spr bone:(GHBone*)bn name:(NSString*)skinName uuid:(NSString*)skinUUID{

    self = [super init];
    if(self){
        sprite = spr;
        bone = bn;
        if(skinName)
            name = [[NSString alloc] initWithString:skinName];
        if(skinUUID)
            uuid = [[NSString alloc] initWithString:skinUUID];
    }
    return self;
}

+(id)skinWithSprite:(GHSprite*)spr bone:(GHBone*)bn name:(NSString*)skinName uuid:(NSString*)skinUUID{
    return [[[self alloc] initWithSprite:spr bone:bn name:skinName uuid:skinUUID] autorelease];
}

-(void)dealloc{
    [name release];
    [uuid release];

    sprite = nil;
    bone = nil;

    [super dealloc];
}

-(GHSprite*)sprite{
    return sprite;
}
-(void)setSprite:(GHSprite*)spr{
    sprite = spr;
}

-(GHBone*)bone{
    return bone;
}
-(void)setBone:(GHBone*)val{
    bone = val;
}

-(void)setupTransformations
{
    if(bone && sprite)
    {
        GHBone* _father = (GHBone*)[bone parent];


        angleOffset = 0;//needs to be calculated

        CGPoint bonePoint = _father.position;
        CGPoint currentPos = [sprite position];

        float curAngle = [sprite rotation];
        connectionAngle = curAngle;

        //we flip y for cocos2d
        CGPoint posOffset = ccp(currentPos.x - bonePoint.x,
                                bonePoint.y - currentPos.y);

        positionOffset = posOffset;

        float boneAngle = [bone degrees] ;

        angleOffset = boneAngle - curAngle;
    }
}

-(void)transform
{
    if(sprite == nil || bone == nil)return;

    float degrees = [bone degrees];

    CGPoint posOffset = positionOffset;

    CGPoint bonePos = ccp(((GHBone*)[bone parent]).position.x,
                          ((GHBone*)[bone parent]).position.y);


    CGAffineTransform transformOffset = CGAffineTransformTranslate(CGAffineTransformIdentity, bonePos.x, bonePos.y);


    CGAffineTransform transform = CGAffineTransformRotate(CGAffineTransformIdentity,
                                                          CC_DEGREES_TO_RADIANS(degrees - angleOffset));


    //we need 2 points
    //origin - upward point, in order to calculate new position and new angle
    CGPoint origin = ccp(0,0);
    CGPoint upward = CGPointMake(0, -10);


    CGAffineTransform transform3 = CGAffineTransformRotate(CGAffineTransformIdentity,
                                                           CC_DEGREES_TO_RADIANS(degrees - angleOffset - connectionAngle));
    posOffset = CGPointApplyAffineTransform(posOffset, transform3);

    origin = CGPointApplyAffineTransform(origin, transform);
    upward = CGPointApplyAffineTransform(upward, transform);

    origin = CGPointApplyAffineTransform(origin, transformOffset);
    upward = CGPointApplyAffineTransform(upward, transformOffset);


    //now that we have the 2 points - lets calculate the angle
    float newAngle = (atan2(upward.y - origin.y,
                            upward.x - origin.x)*180.0)/M_PI + 90.0;


    [sprite setPosition:CGPointMake(origin.x + posOffset.x, origin.y - posOffset.y)];
    [sprite setRotation:newAngle];
}

-(CGRect)boundingBox{

    //get the rect of the GHSprite
    return self.sprite.boundingBox;


}
@end