Understanding polygon2D polygon rendering

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1

Godot Version

4.3

Question

I’ve transformed a sprite2D into a polygon2D using bitmap conversion. I intend to slice the polygon2D and only show certain points (i.e. a section of the polygon) relevant on the screen. When testing, I was able to slice at certain indexes and was able to view on the screen, however at other indexes I could not. Could anyone help explain why?

For example,

Displays on screen with 11 points

var slice = polygons[i].slice(0,11)

[(117, 31), (110, 31), (110, 32), (105, 32), (105, 33), (101, 33), (101, 34), (98, 34), (98, 35), (95, 35), (95, 36)]

Does not display on screen with 10 points

var slice = polygons[i].slice(0,10)

[(117, 31), (110, 31), (110, 32), (105, 32), (105, 33), (101, 33), (101, 34), (98, 34), (98, 35), (95, 35)]

			var polygon: Polygon2D = Polygon2D.new()
			print(polygons[i].size()) # size of 452
			var slice = polygons[i].slice(0,11)
			print(slice)
			#slice.sort()
			polygon.polygon = slice
			polygon.texture = texture
			polygon.uv = slice

Original sprite
image

slice size 11 is displaying - not a great example but wanted to show coordinates
image

Larger slice (size 101) which renders but 100 does not
image

Thanks!