jukebox: lamp for play mech chamber

src/net/torvald/terrarum/audio/dsp/SoftClp.kt

@@ -35,6 +35,7 @@ object SoftClp : TerrarumAudioFilter() {
      * @return -0.5..0.5
      */
     private fun clipfun0(x0: Double): Double {
+//        val p = 0.277777 // knee of around -1.94dB
         val p = 0.44444 // knee of around -6.02dB
         val p1 = sqrt(1.0 - 2.0 * p)
 

src/net/torvald/terrarum/modulebasegame/gameactors/FixtureJukebox.kt

@@ -1,6 +1,12 @@
 package net.torvald.terrarum.modulebasegame.gameactors
 
 import com.badlogic.gdx.Gdx
+import com.badlogic.gdx.graphics.Color
+import com.badlogic.gdx.graphics.Texture
+import com.badlogic.gdx.graphics.g2d.SpriteBatch
+import com.badlogic.gdx.graphics.g2d.TextureRegion
+import com.jme3.math.FastMath
+import net.torvald.spriteanimation.SheetSpriteAnimation
 import net.torvald.terrarum.App.printdbg
 import net.torvald.terrarum.INGAME
 import net.torvald.terrarum.ModMgr
@@ -9,6 +15,8 @@ import net.torvald.terrarum.audio.AudioMixer
 import net.torvald.terrarum.audio.AudioMixer.DEFAULT_FADEOUT_LEN
 import net.torvald.terrarum.audio.dsp.Convolv
 import net.torvald.terrarum.audio.dsp.NullFilter
+import net.torvald.terrarum.blendNormalStraightAlpha
+import net.torvald.terrarum.blendScreen
 import net.torvald.terrarum.gameactors.AVKey
 import net.torvald.terrarum.langpack.Lang
 import net.torvald.terrarum.modulebasegame.MusicContainer
@@ -39,6 +47,8 @@ class FixtureJukebox : Electric {
         }
     }
 
+    @Transient private val backLamp: SheetSpriteAnimation
+
     init {
         val itemImage = FixtureItemBase.getItemImageFromSingleImage("basegame", "sprites/fixtures/jukebox.tga")
 
@@ -53,6 +63,12 @@ class FixtureJukebox : Electric {
 
         setWireSinkAt(0, 2, "appliance_power")
         setWireConsumptionAt(0, 2, Vector2(350.0, 0.0))
+
+        val backLampTex = Texture(ModMgr.getGdxFile("basegame", "sprites/fixtures/jukebox_innerlamp.tga"))
+        backLamp = SheetSpriteAnimation(this).also {
+            it.setSpriteImage(TextureRegionPack(backLampTex, TILE_SIZE * 2, TILE_SIZE * 3))
+            it.setRowsAndFrames(1, 1)
+        }
     }
 
     private var waitAkku = 0f
@@ -88,6 +104,24 @@ class FixtureJukebox : Electric {
         }
     }
 
+    @Transient private var lampDecay = 0f
+
+    override fun drawBody(frameDelta: Float, batch: SpriteBatch) {
+        blendNormalStraightAlpha(batch)
+        super.drawBody(frameDelta, batch)
+
+        if (isVisible && musicNowPlaying != null) {
+            val vol0 = (musicTracks[musicNowPlaying]?.processor?.maxSigLevel?.average() ?: 0.0).toFloat()
+            val vol = FastMath.interpolateLinear(0.8f, vol0, lampDecay)
+
+            blendScreen(batch)
+            backLamp.colourFilter = Color(0f, vol.coerceIn(0f, 1f), 0f, 1f)
+            drawSpriteInGoodPosition(frameDelta, backLamp, batch)
+
+            lampDecay = vol
+        }
+    }
+
     private fun forceStop() {
         musicNowPlaying?.let {
             stopAudio(it)