feat: add basic reusable 2D objects

Fixes #51

birb/objects/2D/indexedrect.lua

@@ -0,0 +1,68 @@
+-- indexedrect.lua :: An indexed rectangle is a rectangle indexed to a point,
+-- Basically a rectangle that have its coordinate recalculated from an existing
+-- point
+
+--[[
+  Copyright © 2019 Kazhnuz
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy of
+  this software and associated documentation files (the "Software"), to deal in
+  the Software without restriction, including without limitation the rights to
+  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+  the Software, and to permit persons to whom the Software is furnished to do so,
+  subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in all
+  copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+  FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+]]
+
+local Rect = require "birb.objects.2D.rect"
+local IndexedRect = Rect:extend()
+
+function IndexedRect:new(origin, ox, oy, w, h)
+    self.setOrigin(origin)
+    self.ox = ox
+    self.oy = oy
+    local x, y = self:getPosition()
+    IndexedRect.super.new(self, x, y, w, h)
+end
+
+function IndexedRect:setRelativePosition(ox, oy)
+    self.ox = ox or self.ox
+    self.oy = oy or self.oy
+end
+
+function IndexedRect:setOrigin(origin)
+    self.origin = origin
+    -- We should check if the origin is really a point
+end
+
+function IndexedRect:getOrigin(origin)
+    return self.origin
+end
+
+function IndexedRect:getPosition()
+    return self.origin.x + self.ox, self.origin.y + self.oy
+end
+
+function IndexedRect:updateRect()
+    local x, y = self:getPosition()
+    self:setPosition(x, y)
+    return x, y, self.w, self.h
+end
+
+function IndexedRect:modify(ox, oy, w, h)
+    self.ox = ox
+    self.oy = oy
+    self:setSize(w, h)
+    self:updateRect()
+end
+
+return IndexedRect

birb/objects/2D/point.lua

@@ -0,0 +1,71 @@
+-- point.lua :: a 2D point.
+
+--[[
+  Copyright © 2019 Kazhnuz
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy of
+  this software and associated documentation files (the "Software"), to deal in
+  the Software without restriction, including without limitation the rights to
+  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+  the Software, and to permit persons to whom the Software is furnished to do so,
+  subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in all
+  copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+  FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+]]
+
+local Point = Object:extend()
+
+function Point:new(x, y)
+    self.x, self.y = x, y
+end
+
+function Point:setPosition(x, y)
+    self.x, self.y = x, y
+end
+
+function Point:move(x, y)
+    local x = x or 0
+    local y = y or 0
+    self:setPosition(self.x + x, self.y + y)
+end
+
+function Point:getPosition()
+    return self.x, self.y
+end
+
+function Point:getDistance(x, y)
+    return utils.math.pointDistance(self.x, self.y, x, y)
+end
+
+function Point:getDistanceFromPoint(other)
+    local x, y = other:getPosition()
+    self:getDistance(x, y)
+end
+
+function Point:getDirection(x, y)
+    return utils.math.pointDirection(self.x, self.y, x, y)
+end
+
+function Point:getDirectionFromPoint(other)
+    local x, y = other:getPosition()
+    self:getDirection(x, y)
+end
+
+function Point:getMiddlePoint(x, y)
+    return utils.math.getMiddlePoint(self.x, self.y, x, y)
+end
+
+function Point:getDirectionFromPoint(other)
+    local x, y = other:getPosition()
+    self:getMiddlePoint(x, y)
+end
+
+return Point

birb/objects/2D/rect.lua

@@ -0,0 +1,65 @@
+-- rect.lua :: a 2D rectangle.
+
+--[[
+  Copyright © 2019 Kazhnuz
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy of
+  this software and associated documentation files (the "Software"), to deal in
+  the Software without restriction, including without limitation the rights to
+  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+  the Software, and to permit persons to whom the Software is furnished to do so,
+  subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in all
+  copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+  FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+]]
+
+local Point = require "birb.objects.2D.point"
+local Rect = Point:extend()
+
+function Rect:new(x, y, w, h)
+    Rect.super.new(self, x, y)
+    self:setSize(w, h)
+end
+
+function Rect:setSize(w, h)
+    self.w = w or self.w
+    self.h = h or self.h
+end
+
+function Rect:getArea()
+    local x, y = self:getPosition()
+    return x, y, self.w, self.h
+end
+
+function Rect:getCorners()
+    local x, y, w, h = self:getArea()
+    return x, y, x + w, y + h
+end
+
+function Rect:getCenter()
+    local x, y, w, h = self:getArea()
+    return math.floor(x + (w/2)), math.floor(y + (h/2))
+end
+
+function Rect:areCoordInside(dx, dy)
+    local x, y, w, h = self:getArea()
+    return ((dx > x) and (dx < x + w) and (dy > y) and (dy < y + h))
+end
+
+function Rect:getRelativeCoordinate(dx, dy)
+    return dx - self.x, dy - self.y
+end
+
+function Rect:drawBox()
+    utils.graphics.box(self.x, self.y, self.w, self.h)
+end
+
+return Rect