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Re: Confused about floats
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Re: Confused about floats


  • Subject: Re: Confused about floats
  • From: Corbin Dunn <email@hidden>
  • Date: Tue, 05 Oct 2010 08:31:21 -0700

On Oct 5, 2010, at 2:17 AM, Amy Heavey wrote:

> I've got two float values (x and y) that I'm using to change the coordinates of a drawing action that is being looped through. I can add a value to x and it draws the next image along, but I want to test the value of x and if it is out of bounds I want to reset it to zero and increase y, so I get a grid of images drawn.
>
> For some reason, even though I can do
> x = x+128;
> and it moves the image accross, x seems to be null so I can't test against it, my if statement ' if (x > 300){' always fails.
>
> This must be something really simple I just can't see it this morning? I'd appreciate any help.
>
> Many Thanks
>
> Amy
>
> Full code being used:
>
> 	//select all images for kit
> 	 NSArray* kitImages = [kit valueForKeyPath:@"kitItems.kitItemProduct.productImage"];
>
> 	//set coordinates to x,y -> 0,0 to start
> 	float x = 0;
> 	float y = 0;
> 	//for each image
> 	NSEnumerator *imageLoop = [kitImages objectEnumerator];
> 	NSString *imgPath;
> 	while ((imgPath = [imageLoop nextObject])) {
> 		NSImage *img = [[NSImage alloc]initWithContentsOfFile:imgPath];
>
> 		//apply image to view
> 		[targetImage lockFocus];
> 		[img drawInRect:NSMakeRect(x,y,100,100)
> 				  fromRect:NSMakeRect(x,y,100,100)

^^ This is probably wrong --  it should be fromRect:NSMakeRect(0, 0, img.size.width, img.size.height)

corbin


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References: 
 >Confused about floats (From: Amy Heavey <email@hidden>)

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