85 lines
2.7 KiB
Lua
85 lines
2.7 KiB
Lua
--[[
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Generally whenever you want to get a position B that is distance units away from position A such that position B is positioned at a specific angle in relation to position A, the pattern is something like:
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bx = ax + distance*math.cos(angle) and by = ay + distance*math.sin(angle).
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]]
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---@class Player:GameObject
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---@field area Area
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---@field x number
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---@field y number
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---@field opts table|nil
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local Player = GameObject:extend()
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function Player:new(area, x, y, opts)
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Player.super.new(self, area, x, y, opts)
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self.w, self.h = 12, 12
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self.collider = self.area.world:circle(self.x, self.y, math.floor(self.w*0.8))
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-- player angle
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self.r = -math.pi/2
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-- velocity of player angle rotation
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self.rv = 1.66*math.pi
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-- player velocity
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self.v = 0
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-- max player velocity
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self.max_v = 100
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-- player acceleration
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self.a = 100
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-- attack rate
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self.ar = 0.24
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self.timer:every(self.ar, function() self:shoot() end)
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end
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function Player:update(dt)
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Player.super.update(self, dt)
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if self:isDead() then return end
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-- controls
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if input:down('left') then self.r = self.r - self.rv*dt end
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if input:down('right') then self.r = self.r + self.rv*dt end
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-- update velocity
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self.v = math.min(self.v + self.a*dt, self.max_v)
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-- update position
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local vx = self.v * math.cos(self.r) -- velocity X
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local vy = self.v * math.sin(self.r) -- velocity Y
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self.x = self.x + vx * dt -- update position X
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self.y = self.y + vy * dt -- update position Y
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-- move collision area
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self.collider:moveTo(self.x, self.y)
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-- offscreen kill
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if self.x < 0-self.w then self:kill() end
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if self.y < 0-self.h then self:kill() end
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if self.x > gw+self.w then self:kill() end
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if self.y > gh+self.h then self:kill() end
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if input:pressed('f11') then self:kill() end
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end
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function Player:draw()
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Player.super.draw(self)
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if DEBUG then
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love.graphics.setColor(COLORS.collision)
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self.collider:draw()
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love.graphics.setColor(COLORS.debug)
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love.graphics.line(self.x, self.y, self.x + 2*self.w*math.cos(self.r), self.y + 2*self.w*math.sin(self.r))
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end
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love.graphics.setColor(COLORS.default)
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love.graphics.circle('line', self.x, self.y, self.w)
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end
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function Player:shoot()
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local d = 1.2*self.w
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local offset_x, offset_y = self.x + d*math.cos(self.r), self.y + d*math.sin(self.r)
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self.area:addGameObject('ShootEffect', offset_x, offset_y, {player = self, d = d})
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local proj = self.area:addGameObject('Projectile', offset_x, offset_y, {v = 100 ,r = self.r})
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proj.timer:tween(0.5, proj, {v = 400}, 'linear')
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end
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return Player
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