79 lines
2.7 KiB
Lua
79 lines
2.7 KiB
Lua
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-- The base GameObject class.
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-- The general way of creating an object that implements these functions goes like this:
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--[[
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MyGameObject = Object:extend()
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MyGameObject:implement(GameObject)
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function MyGameObject:init(args)
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self:init_game_object(args)
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end
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function MyGameObject:update(dt)
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self:update_game_object(dt)
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end
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]]--
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-- This simply implements the GameObject class as a mixin into your own class, giving it the functions defined in this file as well as the attributes set from init_game_object.
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-- In general you'd create your own game object like this, for instance:
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-- group = Group()
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-- MyGameObject{group = group, x = 100, y = 100, v = 100, r = math.pi/4}
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-- And then this object would be automatically updated and drawn by the group.
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-- Alternatively you could add the object to the group manually:
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-- my_object = MyGameObject{x = 100, y = 100, v = 100, r = math.pi/4}
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-- group:add(my_object)
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-- One of the nice patterns I've found was a passing arguments as a key + value table.
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-- So in the case above, the object would automatically have its .x, .y and .v attributes set to 100 and its .r attribute set to math.pi/4.
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GameObject = Object:extend()
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function GameObject:init_game_object(args)
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for k, v in pairs(args or {}) do self[k] = v end
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if self.group then self.group:add(self) end
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self.x, self.y = self.x or 0, self.y or 0
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self.r = self.r or 0
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self.sx, self.sy = self.sx or 1, self.sy or 1
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self.id = self.id or random:uid()
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self.t = Trigger()
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self.springs = Springs()
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self.flashes = Flashes()
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self.hfx = HitFX(self)
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self.spring = Spring(1)
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return self
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end
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function GameObject:update_game_object(dt)
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self.t:update(dt)
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self.springs:update(dt)
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self.flashes:update(dt)
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self.hfx:update(dt)
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self.spring:update(dt)
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if self.body then self:update_physics(dt) end
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if self.shape then
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if self.shape.vertices and self.body then
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self.shape.vertices = {self.body:getWorldPoints(self.fixture:getShape():getPoints())}
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self.shape:get_centroid()
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end
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if self.body then
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self.shape:move_to(self:get_position())
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end
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if self.interact_with_mouse then
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local colliding_with_mouse = self.shape:is_colliding_with_point(self.group:get_mouse_position())
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if colliding_with_mouse and not self.colliding_with_mouse then
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self.colliding_with_mouse = true
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if self.on_mouse_enter then self:on_mouse_enter() end
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elseif not colliding_with_mouse and self.colliding_with_mouse then
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self.colliding_with_mouse = false
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if self.on_mouse_exit then self:on_mouse_exit() end
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end
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if self.colliding_with_mouse then
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if self.on_mouse_stay then self:on_mouse_stay() end
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end
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end
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end
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end
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function GameObject:draw_game_object()
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if self.body then self:draw_physics() end
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end
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