2021-10-03 19:56:35 +02:00
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tool
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2021-10-03 17:04:54 +02:00
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extends Reference
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const Commons = preload("res://addons/mat_maker_gd/nodes/common/commons.gd")
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static func shape_circle(uv : Vector2, sides : float, size : float, edge : float) -> float:
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uv.x = 2.0 * uv.x - 1.0
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uv.y = 2.0 * uv.y - 1.0
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edge = max(edge, 1.0e-8)
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var distance : float = uv.length()
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return clamp((1.0 - distance / size) / edge, 0.0, 1.0)
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static func shape_polygon(uv : Vector2, sides : float, size : float, edge : float) -> float:
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uv.x = 2.0 * uv.x - 1.0
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uv.y = 2.0 * uv.y - 1.0
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edge = max(edge, 1.0e-8)
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#simple no branch for division by zero
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uv.x += 0.0000001
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var angle : float = atan(uv.y / uv.x) + 3.14159265359
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var slice : float = 6.28318530718 / sides
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return clamp((size - cos(floor(0.5 + angle / slice) * slice - angle) * uv.length()) / (edge * size), 0.0, 1.0)
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static func shape_star(uv : Vector2, sides : float, size : float, edge : float) -> float:
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uv.x = 2.0 * uv.x - 1.0
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uv.y = 2.0 * uv.y - 1.0
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edge = max(edge, 1.0e-8);
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#simple no branch for division by zero
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uv.x += 0.0000001
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var angle : float = atan(uv.y / uv.x)
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var slice : float = 6.28318530718 / sides
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return clamp((size - cos(floor(1.5 + angle / slice - 2.0 * Commons.step(0.5 * slice, Commons.modf(angle, slice))) * slice - angle) * uv.length()) / (edge * size), 0.0, 1.0);
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static func shape_curved_star(uv : Vector2, sides : float, size : float, edge : float) -> float:
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uv.x = 2.0 * uv.x - 1.0
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uv.y = 2.0 * uv.y - 1.0
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edge = max(edge, 1.0e-8);
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#simple no branch for division by zero
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uv.x += 0.0000001
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var angle : float = 2.0*(atan(uv.y / uv.x) + 3.14159265359)
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var slice : float = 6.28318530718 / sides
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return clamp((size - cos(floor(0.5 + 0.5 * angle / slice) * 2.0 * slice - angle) * uv.length())/(edge * size), 0.0, 1.0);
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static func shape_rays(uv : Vector2, sides : float, size : float, edge : float) -> float:
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uv.x = 2.0 * uv.x - 1.0
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uv.y = 2.0 * uv.y - 1.0
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edge = 0.5 * max(edge, 1.0e-8) * size
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#simple no branch for division by zero
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uv.x += 0.0000001
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var slice : float = 6.28318530718 / sides
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var angle : float = Commons.modf(atan(uv.y / uv.x) + 3.14159265359, slice) / slice
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return clamp(min((size - angle) / edge, angle / edge), 0.0, 1.0);
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