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AppGameKit Classic Chat / Adding clickable regions to Sprites

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badkneecap
14
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Joined: 21st Jun 2010
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Posted: 15th Jun 2020 03:20
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Is there an easy way (or formula) to test if a mouse was clicked in a certain region on a sprite? For example, I have an image that is 100 x 100. If the user clicks anywhere in the square from 0, 0 to 49, 49 I take them to graphic 1. If they click anywhere in the square 50, 0 to 100, 50 I take them to graphic 2, etc. I also scale my images to fit the width of my screen, so it could be twice the size. I was looking for a function that would return my mouse pointer position X and Y relative to the X and Y position of the top left of the sprite. Does that make sense? Is there a function that would return that or is there a function that calculates this already?
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Scraggle
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21
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Joined: 10th Jul 2003
Location: Yorkshire
Posted: 15th Jun 2020 03:47 Edited at: 15th Jun 2020 03:47
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You can use GetSpriteInBox() and offset the coordinates from the sprites position.
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Bengismo
7
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Joined: 20th Nov 2017
Location: Yorkshire, England
Posted: 15th Jun 2020 07:06 Edited at: 15th Jun 2020 09:56
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You can use GetSpriteHit() and GetSpriteXFromWorld( iSpriteIndex, x, y ) /GetSpriteYFromWorld( iSpriteIndex, x, y ) to find out where on the sprite it was clicked relative to the current sprite offset.


Alternatively, you could set the sprite up with 4 different box shapes and set each shape with a different sprite category.

Then you just use getspritehitcategory() to find out which (if any) of the 4 regions were clicked on. Its harder to set up but its then nice and easy to use.
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