From e147b561b263ad878201f68ba0f76b9a1d76c59c Mon Sep 17 00:00:00 2001
From: =?utf8?q?Tomas=20Wenstr=C3=B6m?= <tomas.wenstrom@gmail.com>
Date: Mon, 14 Jun 2021 21:19:06 +0200
Subject: [PATCH] Add fire mode

Untested, because I can't get JavaFX to run
---
 src/kaka/cakelight/Commands.java      | 13 +++++++++++
 src/kaka/cakelight/Console.java       |  1 +
 src/kaka/cakelight/mode/FireMode.java | 42 +++++++++++++++++++++++++++++++++++
 3 files changed, 56 insertions(+)
 create mode 100644 src/kaka/cakelight/mode/FireMode.java

diff --git a/src/kaka/cakelight/Commands.java b/src/kaka/cakelight/Commands.java
index e665cf1..8f61713 100644
--- a/src/kaka/cakelight/Commands.java
+++ b/src/kaka/cakelight/Commands.java
@@ -168,6 +168,19 @@ class Commands {
 	});
     }
 
+    static Console.Command fireMode() {
+        return modeCommand(new String[] {"f", "fire"}, (console, args) -> {
+	    if (args.length > 1) {
+		console.out("setting multi-color fire mode");
+		return new FireMode(Stream.of(args)
+			.map(console::parseColor)
+			.toArray(Color[]::new)
+		);
+	    }
+	    return null;
+	});
+    }
+
     static Console.Command sunriseMode() {
         return modeCommand(new String[] {"sunrise"}, (console, args) -> {
 	    if (args.length == 1) {
diff --git a/src/kaka/cakelight/Console.java b/src/kaka/cakelight/Console.java
index d7a29a3..960cc45 100644
--- a/src/kaka/cakelight/Console.java
+++ b/src/kaka/cakelight/Console.java
@@ -37,6 +37,7 @@ public class Console extends Thread {
 	register(Commands.saturation());
 	register(Commands.ambientMode());
 	register(Commands.noiseMode());
+	register(Commands.fireMode());
 	register(Commands.sunriseMode());
     }
 
diff --git a/src/kaka/cakelight/mode/FireMode.java b/src/kaka/cakelight/mode/FireMode.java
new file mode 100644
index 0000000..02db5b4
--- /dev/null
+++ b/src/kaka/cakelight/mode/FireMode.java
@@ -0,0 +1,42 @@
+package kaka.cakelight.mode;
+
+import kaka.cakelight.Color;
+import kaka.cakelight.LedFrame;
+import kaka.cakelight.util.SimplexNoise3D;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+public class FireMode extends AmbientMode {
+    private final Color[] colors;
+    private SimplexNoise3D noise = new SimplexNoise3D(0);
+
+    public FireMode(Color... colors) {
+	assert colors.length > 1;
+	List<Color> list = Arrays.asList(colors);
+	Collections.reverse(list);
+	this.colors = list.toArray(new Color[colors.length]);
+    }
+
+    @Override
+    protected void updateFrame(LedFrame frame, long time, int count) {
+	for (int i = 0; i < config.leds.getCount(); i++) {
+	    double x = frame.xOf(i);
+	    double y = frame.yOf(i);
+	    double v = Math.pow(Math.min(1, Math.max(0, noise.getr(0.0, 1.0, 1, x, y - (time / 7000.0), time / 3500.0))), 1.5);
+	    frame.setLedColor(i, getColorAt(v * y));
+	}
+    }
+
+    private Color getColorAt(double value) { // 0.0 to 1.0
+	double localRange = 1.0 / (colors.length - 1);
+	int index = (int)(value / localRange);
+	double localValue = (value / localRange) - index;
+	if (index == colors.length - 1) {
+	    return colors[colors.length - 1];
+	} else {
+	    return colors[index].interpolate(colors[index + 1], localValue);
+	}
+    }
+}
-- 
2.11.0