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Added nearest neighbour rotation

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This commit is contained in:
azagaya 2020-02-03 13:55:55 -03:00
parent c3118e6ca2
commit d1ef71ceee
3 changed files with 44 additions and 6 deletions
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28
Scripts/Global.gd
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@ -670,6 +670,13 @@ func scale3X(sprite : Image, tol : float = 50) -> Image:
return scaled
func rotxel(sprite : Image, angle : float):
# If angle is simple, then nn rotation is the best
if angle == 0 || angle == PI/2 || angle == PI || angle == 2*PI:
nn_rotate(sprite, angle)
return
var aux : Image = Image.new()
aux.copy_from(sprite)
var center : Vector2 = Vector2(sprite.get_width()/2, sprite.get_height()/2)
@ -772,7 +779,26 @@ func rotxel(sprite : Image, angle : float):
sprite.set_pixel(x, y, p)
sprite.unlock()
aux.unlock()
func nn_rotate(sprite : Image, angle : float):
var aux : Image = Image.new()
aux.copy_from(sprite)
sprite.lock()
aux.lock()
var ox: int
var oy: int
var center : Vector2 = Vector2(sprite.get_width()/2, sprite.get_height()/2)
for x in range(sprite.get_width()):
for y in range(sprite.get_height()):
ox = (x - center.x)*cos(angle) + (y - center.y)*sin(angle) + center.x
oy = -(x - center.x)*sin(angle) + (y - center.y)*cos(angle) + center.y
if ox >= 0 && ox < sprite.get_width() && oy >= 0 && oy < sprite.get_height():
sprite.set_pixel(x, y, aux.get_pixel(ox, oy))
else:
sprite.set_pixel(x, y, Color(0,0,0,0))
sprite.unlock()
aux.unlock()
func similarColors(c1 : Color, c2 : Color, tol : float = 100) -> bool:
var dist = colorDistance(c1, c2)
return dist <= tol