Vector2 distance_to weird results [closed]

Question

I'm using Vector2.distance_to to get the distance between a MeshInstance and a KinematicBody but the results aren't as expected.

I'm using distance_to like so:

var player_global_transform = $KinematicBody.get_global_transform().origin var player_position = Vector2(player_global_transform.x, player_global_transform.z) # Here I loop through the planes and compare positions but to simplify it I'll just show # the one. var plane_global_transform = $MeshInstance.get_global_transform().origin var plane_position = Vector2(plane_global_transform.x, plane_global_transform.z) var player_distance_to_plane = player_position.distance_to(plane_position)

Also I'm using Vector2s because I don't care about Y values for this calculation.

Lets say I have 9 mesh planes (240x240) in a grid and the player is standing in the middle mesh of them:

The distance from the KinematicBody and the middle square is (0, 0) as the player is right in the middle of it. Now if I move over a square to the left:

The distance returned is (240, 0) which is expected as I'm now 1 mesh plane distance away from the center of the previous mesh. Now if I extend the grid and add 3 more meshes to the left and move over to that one:

The distance is now (360, 0) instead of (480, 0) and I can't seem to figure out why. It also seems that if I add another column of plane meshes to the left and move over another square, it's still (360, 0).

It sounds like, by creating more planes, you've also shifted their locations. Can you share a minimal complete verifiable example of the problem, where we can see the code that places your planes alongside the code that calculates distances to them? — DMGregory
– DMGregory ♦, Commented Jun 26, 2020 at 20:41
Which, exactly, is the middle plane from which you measure when there are four rows? Notice that 240 * 1.5 = 360, you seem to be measuring from the middle of the grid. — Theraot
– Theraot, Commented Sep 28, 2020 at 10:04

Clemens Tolboom · Accepted Answer · 2020-10-19 16:19:44Z

You started with a 3x3 grid/mesh of unit 240px positioning the dot in its center (0,0).

Next you move the dot 1 unit (240, 0) to the left which is the center of the first column.

By adding a column to the right the mesh center point the mesh is now 4 units wide moving the dot half a unit (120px) relative to the new center which equals to 240px + 120px = 360px aka (-360,0)

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