Topic was automatically imported from the old Question2Answer platform.
Asked By
Hytak
Old Version
Published before Godot 3 was released.
I want to convert a Vector3 to a vector2 by removing one of the components.
For an array i would use array.remove(axis), however no such function exists for Vector3.
I know that Vector3 and vector2 do support other array like assignments: vector3[axis] = 1
The code that i am using now:
func get_vector2_from_vector3(vector3, axis):
var vector2= Vector2(0,0)
var i = 0
var j = 0
while i < 2:
if j == axis:
j += 1
else:
vector2[i] = vector3[j]
i += 1
j += 1
return vector2
and
if (axis == 0):
var vec2 = Vector2(vec3.y, vec3.z)
elif (axis == 1):
var vec2 = Vector2(vec3.x, vec3.z)
elif (axis == 2):
var vec2 = Vector2(vec3.x, vec3.y)
Is there simpler code for this? (preferably without loop or repetition of similar code)
If this is impossible, then i would like to know that as well
I use this and the opposite (Vector2 → Vector3) a lot, so any simpler code is welkom
Maybe I’m missing what you’re desiring, but generally I just do something like this:
var vec2 = Vector2(vec3.x, vec3.z)
This is indeed not exactly what i meant, var vec2 = Vector2(vec3.x, vec3.z) requires that the y_axis is removed.
you did bring me on an idea:
if (axis = 0):
var vec2 = Vector2(vec3.y, vec3.z)
elif (axis = 1):
var vec2 = Vector2(vec3.x, vec3.z)
elif (axis = 2):
var vec2 = Vector2(vec3.x, vec3.y)
Hytak | 2017-04-20 20:00
Oh ok, now I understand what you meant by returning an axis. You want a function that can selectively capture one plane, choosing one of the three combinations of axes to form the basis.
And, quite right, looks like you found your own solution. I hope that idea cleaned some things up for you.
