iphone - 《水果忍者》游戏中的切片效果如何发挥作用？

Question

有人知道水果忍者游戏中的切片效果是如何工作的吗？

或者有其他方法可以达到类似的效果吗？

如何获得所有滑动点以及如何在其上画线请帮忙....

Answer 1

我画了很多条线来产生切片效果，并同时从我放置点来画线的可变数组中删除点

代码:-

-(void)init
    {
     [self checkAllArray];
     [self schedule:@selector(removePoints:) interval:0.0001f];
    }
-(void)checkAllArray
{
    if (naughtytoucharray==NULL)
        naughtytoucharray=[[NSMutableArray alloc] init];
    else
    {
        [naughtytoucharray release];
        naughtytoucharray=nil;
        naughtytoucharray=[[NSMutableArray alloc] init];
    }
}

-(void)draw
{
    glEnable(GL_LINE_SMOOTH);
    glColor4ub(255, 255, 255, 255); //line color 
    //glLineWidth(2.5f);
    for(int i = 0; i < [naughtytoucharray count]; i+=2)
    {
        CGPoint start = CGPointFromString([naughtytoucharray objectAtIndex:i]);
        CGPoint end = CGPointFromString([naughtytoucharray objectAtIndex:i+1]);
                ccDrawLine(start, end); // line 1
        ccDrawLine(ccp(start.x-2,start.y-2),ccp(end.x-2,end.y-2));// line 2
        ccDrawLine(ccp(start.x-4,start.y-4),ccp(end.x-4,end.y-4));// line 3
        ccDrawLine(ccp(start.x-6,start.y-6),ccp(end.x-6,end.y-6));// line 4
        ccDrawLine(ccp(start.x-8,start.y-8),ccp(end.x-8,end.y-8));// line 5
    }
}

- (void)ccTouchesMoved:(NSSet *)touches withEvent:(UIEvent *)event 
{
    CGPoint new_location = [touch locationInView: [touch view]];
    new_location = [[CCDirector sharedDirector] convertToGL:new_location];
    CGPoint oldTouchLocation = [touch previousLocationInView:touch.view];
    oldTouchLocation = [[CCDirector sharedDirector] convertToGL:oldTouchLocation];
    [naughtytoucharray addObject:NSStringFromCGPoint(new_location)];
    [naughtytoucharray addObject:NSStringFromCGPoint(oldTouchLocation)];
}

-(void)removePoints:(ccTime *)tm
{
    if ([naughtytoucharray count]>0)
    {
        [naughtytoucharray removeObjectAtIndex:0];
    }
}

-(void)dealloc
{
    //NSLog(@"deallocing lightning\n");
    [self removeAllChildrenWithCleanup:YES];
    [super dealloc];
}