40 lines
1.7 KiB
Lua
40 lines
1.7 KiB
Lua
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-- A rectangle class.
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-- Implements every function that Polygon does.
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Rectangle = Object:extend()
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Rectangle:implement(Polygon)
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function Rectangle:init(x, y, w, h, r)
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self.x, self.y, self.w, self.h, self.r = x, y, w, h, r
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local x1, y1 = math.rotate_point(x - w/2, y - h/2, r or 0, x, y)
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local x2, y2 = math.rotate_point(x + w/2, y - h/2, r or 0, x, y)
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local x3, y3 = math.rotate_point(x + w/2, y + h/2, r or 0, x, y)
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local x4, y4 = math.rotate_point(x - w/2, y + h/2, r or 0, x, y)
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self.vertices = {x1, y1, x2, y2, x3, y3, x4, y4}
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self:get_size()
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self:get_bounds()
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self:get_centroid()
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end
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-- An emerald rectangle class. This is a rectangle with its corners cut by the given rx, ry amount.
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-- Implements every function that Polygon does.
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EmeraldRectangle = Object:extend()
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EmeraldRectangle:implement(Polygon)
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function EmeraldRectangle:init(x, y, w, h, rx, ry, r)
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self.x, self.y, self.w, self.h, self.r = x, y, w, h, r
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self.rx, self.ry = rx, ry
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local x1, y1 = math.rotate_scale_point(x - w/2, y - h/2 + ry, r or 0, x, y)
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local x2, y2 = math.rotate_scale_point(x - w/2 + rx, y - h/2, r or 0, x, y)
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local x3, y3 = math.rotate_scale_point(x + w/2 - rx, y - h/2, r or 0, x, y)
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local x4, y4 = math.rotate_scale_point(x + w/2, y - h/2 + ry, r or 0, x, y)
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local x5, y5 = math.rotate_scale_point(x + w/2, y + h/2 - ry, r or 0, x, y)
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local x6, y6 = math.rotate_scale_point(x + w/2 - rx, y + h/2, r or 0, x, y)
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local x7, y7 = math.rotate_scale_point(x - w/2 + rx, y + h/2, r or 0, x, y)
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local x8, y8 = math.rotate_scale_point(x - w/2, y + h/2 - ry, r or 0, x, y)
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self.vertices = {x1, y1, x2, y2, x3, y3, x4, y4, x5, y5, x6, y6, x7, y7, x8, y8}
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self:get_size()
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self:get_bounds()
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self:get_centroid()
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end
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