From e2f02985d33ef353eabde6a9d47c17d7375a9794 Mon Sep 17 00:00:00 2001
From: Donald Ball <donald.ball@gmail.com>
Date: Thu, 20 Nov 2025 22:53:33 -0500
Subject: [PATCH] constant rocket plume

---
 asteroids/actors.lua | 27 ++++++++++++++++++++++++++-
 asteroids/main.lua   |  2 ++
 2 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/asteroids/actors.lua b/asteroids/actors.lua
index df15fd4..20e118b 100644
--- a/asteroids/actors.lua
+++ b/asteroids/actors.lua
@@ -94,6 +94,22 @@ function actors.buildActors(game)
         instance.engineSound = love.audio.newSource(instance.engineSound)
         instance.engineSound:setVolume(0)
         instance.engineSound:setLooping(true)
+        instance.rocketPlume = love.graphics.newParticleSystem(instance.rocketPlume)
+        instance.rocketPlume:setColors(1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1)
+        instance.rocketPlume:setSizes(1.0, 0.9, 0.1)
+        instance.rocketPlume:setEmissionRate(1000)
+        -- TODO probably governed most by thrust
+        instance.rocketPlume:setParticleLifetime(0.1, 0.25)
+        instance.rocketPlume:setEmissionArea('normal', 10, 10)
+        instance.rocketPlume:setSpeed(150, 300)
+        instance.rocketPlume:setRadialAcceleration(40, 80)
+        instance.rocketPlume:setLinearDamping(0, 0)
+        instance.rocketPlume:setDirection(phys.tau * 3 / 4)
+        instance.rocketPlume:setSpread(0)
+        instance.rocketPlume:setSizeVariation(0)
+        instance.rocketPlume:setSpin(0.5, 1)
+        instance.rocketPlume:setTangentialAcceleration(0, 0)
+
         setmetatable(instance, ships_mt)
         return instance
     end
@@ -115,7 +131,16 @@ function actors.buildActors(game)
             width / 2,
             height / 2
         )
-        -- TODO rocket exhaust
+        --self.rocketPlume:setDirection(phys.tau * 3 / 4)
+        love.graphics.draw(self.rocketPlume,
+            0,
+            0,
+            (self.facing + phys.tau * 3 / 4) % phys.tau,
+            scale,
+            scale,
+            0,
+            height * 0.75
+        )
         love.graphics.pop()
     end
 
diff --git a/asteroids/main.lua b/asteroids/main.lua
index f2cfbf8..830779b 100644
--- a/asteroids/main.lua
+++ b/asteroids/main.lua
@@ -19,6 +19,7 @@ local function initGame()
             sprite = love.graphics.newImage('resources/playerShip1_blue.png'),
             maxThrust = 200,
             engineSound = love.sound.newSoundData('resources/enginehum3.ogg'),
+            rocketPlume = love.graphics.newImage('resources/sparkle_cloud.png'),
         },
         asteroids = {
             stages = {
@@ -100,6 +101,7 @@ local function update(actor, dt)
 end
 
 function love.update(dt)
+    state.ship.rocketPlume:update(dt)
     if state.controls.joystick ~= nil then
         state.ship.throttle = state.controls.joystick:getGamepadAxis('triggerright')
         if state.ship.throttle > 0 then