bullets and sounds

bullet/bullet.lua

@@ -0,0 +1,73 @@
+Bullet = Object.extend(Object)
+
+function Bullet:new( player )
+	self.player = player
+	self.ex = 0
+	self.ey = 0
+	self.ox = 0
+	self.oy = 0
+	self.angle = 0
+	self.emitted = 0
+	self.lifetime = 1
+	self.finished = false
+	self.speed = 8
+end
+
+function Bullet:update(dt)
+	self.emitted = self.emitted + dt
+
+	if self.emitted > self.lifetime then
+		self.finished = true
+	else
+		self.ex = self.ex + math.lengthdir_x( self.speed, self.angle ) + self.ox
+		self.ey = self.ey + math.lengthdir_y( self.speed, self.angle ) + self.oy
+
+		self.source:setPosition(self.ex, self.ey,0)
+	end
+end
+
+function Bullet:draw()
+	if self.finished == false then
+		local bx = self.ex
+		local by = self.ey
+		local a = math.clamp(0, 1-(-0.3+(self.emitted/self.lifetime)), 1)
+
+		love.graphics.setColor(1,1,1,a)
+		love.graphics.draw( bulletShot, bx, by, self.angle*(math.pi/180) )
+	end
+end
+
+function Bullet:emit( ex, ey, ox, oy, angle, lifetime )
+	self.ex = ex
+	self.ey = ey
+	self.ox = ox
+	self.oy = oy
+	self.angle = angle
+	self.lifetime = lifetime
+
+	self:generateSound(ex,ey)
+end
+
+function Bullet:generateSound(px,py)
+	local sound = sfxr.newSound()
+	sound:resetParameters()
+	sound.waveform = 0
+	sound.frequency.start = math.variance(0.50948863032722, 50)
+	sound.frequency.min = math.variance(0.23191561855507, 50)
+	sound.frequency.slide = -(math.variance(0.30302405172478, 50))
+	sound.duty.ratio = math.variance(0.11477388876231, 50)
+	sound.duty.sweep = math.variance(0.10811502385025, 50)
+	sound.envelope.attack = math.random(0.0,0.1)
+	sound.envelope.sustain = 0.14060104631004 * (math.random(1,100)/100)
+	sound.envelope.decay = math.variance(0.22882606362934, 50)
+	sound.envelope.punch = math.variance(0.29031108049385,50)
+	sound.phaser.offset = 0
+	sound.phaser.sweep = 0
+	sound.highpass.cutoff = math.variance(0.25467943576175, 50)
+
+	local soundData = sound:generateSoundData()
+	self.source = love.audio.newSource(soundData)
+	self.source:setVolume(1)
+	self.source:setPosition(px,py)
+	self.source:play()
+end