150 lines
4.5 KiB
Lua
150 lines
4.5 KiB
Lua
-- actor2D.lua :: the implementation of a 2D actor. It contain every element
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-- needed to create your own 2D actors.
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--[[
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Copyright © 2019 Kazhnuz
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Permission is hereby granted, free of charge, to any person obtaining a copy of
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this software and associated documentation files (the "Software"), to deal in
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the Software without restriction, including without limitation the rights to
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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the Software, and to permit persons to whom the Software is furnished to do so,
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subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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]]
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local Rect = require "framework.classes.2D.rect"
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local BaseActor = require "framework.scenes.world.actors.mixins.base"
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local SpritedActor = require("framework.scenes.world.actors.mixins.sprites")
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local TimedActor = require("framework.scenes.world.actors.mixins.timers")
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local InputActor = require("framework.scenes.world.actors.mixins.inputs")
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local PhysicalActor = require("framework.scenes.world.actors.mixins.physics")
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local Actor2D = Rect:extend()
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Actor2D:implement(BaseActor)
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Actor2D:implement(SpritedActor)
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Actor2D:implement(TimedActor)
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Actor2D:implement(InputActor)
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Actor2D:implement(PhysicalActor)
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local Hitbox = require "framework.scenes.world.actors.utils.hitbox2D"
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-- INIT FUNCTIONS
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-- Initialise the actor and its base functions
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function Actor2D:new(world, type, x, y, w, h, isSolid)
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Actor2D.super.new(self, x, y, w, h)
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self:init(world, type)
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self:initPhysics(Hitbox, isSolid)
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self:initTimers()
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self:initSprite()
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self:initKeys()
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end
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function Actor2D:destroy()
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self.world:removeActor(self)
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self.mainHitbox:destroy()
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self.isDestroyed = true
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end
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-- PHYSICS FUNCTIONS
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-- Handle movement and collisions.
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function Actor2D:moveToFuturePosition(dt)
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local dx, dy = self:getFuturePosition(dt)
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local _, _, cols, colNumber = self:move(dx, dy)
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return cols, colNumber
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end
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function Actor2D:changeSpeedToCollisionNormal(normal)
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local xsp, ysp = self.xsp, self.ysp
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local nx, ny = normal.x, normal.y
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if (nx < 0 and xsp > 0) or (nx > 0 and xsp < 0) then
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xsp = -xsp * self.bounceFactor
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end
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if (ny < 0 and ysp > 0) or (ny > 0 and ysp < 0) then
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ysp = -ysp * self.bounceFactor
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end
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self.xsp, self.ysp = xsp, ysp
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end
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function Actor2D:move(dx, dy)
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local cols, colNumber = {}, 0
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if (self.isDestroyed == false) then
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self.x, self.y, cols, colNumber = self.mainHitbox:checkCollisionAtPoint(dx, dy, self.filter)
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self.mainHitbox:updatePosition()
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end
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return self.x, self.y, cols, colNumber
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end
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function Actor2D:checkCollisionAtPoint(dx, dy)
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local x, y, cols, colNumber = dx, dy, {}, 0
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if (self.isDestroyed == false) then
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x, y, cols, colNumber = self.mainHitbox:checkCollisionAtPoint(dx, dy, self.filter)
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end
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return self.x, self.y, cols, colNumber
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end
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-- GRAVITY SYSTEM FUNCTIONS
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-- All functions related to gravity
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function Actor2D:applyGravity(dt)
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self.ysp = self.ysp + self.grav * dt
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if utils.math.sign(self.ysp) == utils.math.sign(self.grav) then
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self:checkGround( )
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end
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end
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function Actor2D:checkGround()
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local dx, dy = self.x, self.y + utils.math.sign(self.grav)
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local newx, newy, cols, colNumber = self:checkCollisionAtPoint(dx, dy)
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for i, col in ipairs(cols) do
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if (col.type == "touch") or (col.type == "bounce") or (col.type == "slide") then
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if not (self.grav == 0) then
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if col.normal.y ~= utils.math.sign(self.grav) then self.onGround = true 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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-- COORDINATE/MOVEMENT FUNCTIONS
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-- Handle coordinate
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function Actor2D:getViewCenter()
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local x, y = self:getCenter()
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return x, y
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end
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-- HITBOXES FUNCTIONS
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-- Functions related to actor hitboxes
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function Actor2D:packForHitbox()
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return {0, 0, self.w, self.h}
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end
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-- DRAW FUNCTIONS
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-- Draw the actors.
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function Actor2D:draw()
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self:drawStart()
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local x, y = math.floor(self.x), math.floor(self.y)
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self:drawSprite(x, y)
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self:drawEnd()
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end
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return Actor2D
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