76 lines
1.7 KiB
Lua
76 lines
1.7 KiB
Lua
-- A generic machine gun which shoots all kinds of projectiles
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Class = require 'hump/class'
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require 'entities/vickers77'
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require 'entities/tinyshot'
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require 'entities/bigball'
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GUNS = {
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chaingun = {
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interval = 0.01,
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projectile = TinyShot,
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speed = 50000,
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damage = 5
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},
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bigball = {
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interval = 0.2,
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projectile = BigBall,
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speed = 2000,
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damage = 0
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},
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vickers77 = {
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interval = 0.1,
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projectile = Vickers77,
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speed = 10000,
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damage = 25
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}
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}
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MachineGun = Class{
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init = function(self, plane, type)
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self:setType(type)
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-- Plane this gun is attached to
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self.plane = plane
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self.shooting = false
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end;
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update = function(self, dt)
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if self.shooting and self.since_last_shot >= self.gun['interval'] then
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self:fire()
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self.since_last_shot = 0
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else
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self.since_last_shot = self.since_last_shot + dt
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end
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end;
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setType = function(self, type)
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self.gun = GUNS[type]
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self.since_last_shot = 0
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end;
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fire = function(self)
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local gunPos = self.plane:getGunPosition()
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local level = self.plane.level
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local shot = self.gun['projectile'](gunPos[1], gunPos[2], level)
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shot:setOwner(self.plane);
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local angle = self.plane.body:getAngle()
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shot.body:setAngle(angle)
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local speeds = rad_dist_to_xy(angle, self.gun['speed'])
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shot.body:setLinearVelocity(speeds[1], speeds[2])
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end;
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startShooting = function(self)
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self.shooting = true
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end;
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stopShooting = function(self)
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self.shooting = false
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self.since_last_shot = 0
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end;
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}
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