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How is game.physics.arcade.distanceBetween calculated?


Gessle
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I just cannot figure out is distanceBetween calculating from anchor point or upper left corner of a sprite?

Is there a easy way to calculate distance between a single point and a whole sprite, not anchor point nor upper left corner but any point of that sprite?

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Generally, the X/Y of the object is used for calculations...

Looking at the source code for this function, it is the X/Y of the object... Changing the anchor doesn't matter to the calculation at all...
https://github.com/photonstorm/phaser/blob/v2.6.2/src/physics/arcade/World.js#L1918

 

You can also use game.math.distance to get the distance between two points... It takes the individual coordinates instead of the whole object as arguments...
http://phaser.io/docs/2.6.2/Phaser.Math.html#distance

 

How do you mean "distance between a point and a whole sprite"..? Do you want a collection of distances for each pixel the sprite is taking up, or just the X/Y...?

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It calculates from obj.position, which is the anchor point. It will be the top left if the anchor is (0, 0).

For point-to-sprite-point calculations, you can use Phaser.Math#distance with x = sprite.left, sprite.centerX, sprite.right; y = sprite.top, sprite.centerY, sprite.bottom.

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