From 40a06a9bffb56d41e931038fcfdb8f10fe8ca441 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Tomas=20Wenstr=C3=B6m?= <tomas.wenstrom@gmail.com>
Date: Wed, 27 Nov 2019 22:53:11 +0100
Subject: [PATCH] Add sunrise mode

---
 src/kaka/cakelight/Commands.java         | 18 ++++++++++++----
 src/kaka/cakelight/Console.java          |  1 +
 src/kaka/cakelight/mode/SunriseMode.java | 36 ++++++++++++++++++++++++++++++++
 3 files changed, 51 insertions(+), 4 deletions(-)
 create mode 100644 src/kaka/cakelight/mode/SunriseMode.java

diff --git a/src/kaka/cakelight/Commands.java b/src/kaka/cakelight/Commands.java
index f527c12..38fb77e 100644
--- a/src/kaka/cakelight/Commands.java
+++ b/src/kaka/cakelight/Commands.java
@@ -1,9 +1,6 @@
 package kaka.cakelight;
 
-import kaka.cakelight.mode.AmbientMode;
-import kaka.cakelight.mode.SingleColorMode;
-import kaka.cakelight.mode.TwoColorNoiseMode;
-import kaka.cakelight.mode.VideoMode;
+import kaka.cakelight.mode.*;
 
 import java.util.function.BiFunction;
 
@@ -132,4 +129,17 @@ class Commands {
 	    }
 	});
     }
+
+    static Console.Command sunriseMode() {
+        return command(new String[] {"sunrise"}, (console, args) -> {
+	    if (args.length == 1) {
+		int durationSeconds = Integer.parseInt(args[0]);
+		console.getCakelight().setMode(new SunriseMode(durationSeconds));
+		console.out("setting sunrise mode with duration " + durationSeconds);
+		return true;
+	    } else {
+	        return false;
+	    }
+	});
+    }
 }
diff --git a/src/kaka/cakelight/Console.java b/src/kaka/cakelight/Console.java
index f32ba98..3d27a06 100644
--- a/src/kaka/cakelight/Console.java
+++ b/src/kaka/cakelight/Console.java
@@ -32,6 +32,7 @@ public class Console extends Thread {
 	register(Commands.saturation());
 	register(Commands.ambientMode());
 	register(Commands.twoColorNoiseMode());
+	register(Commands.sunriseMode());
     }
 
     public CakeLight getCakelight() {
diff --git a/src/kaka/cakelight/mode/SunriseMode.java b/src/kaka/cakelight/mode/SunriseMode.java
new file mode 100644
index 0000000..896646f
--- /dev/null
+++ b/src/kaka/cakelight/mode/SunriseMode.java
@@ -0,0 +1,36 @@
+package kaka.cakelight.mode;
+
+import kaka.cakelight.Color;
+import kaka.cakelight.LedFrame;
+
+public class SunriseMode extends AmbientMode {
+    private int durationSeconds;
+
+    public SunriseMode(int durationSeconds) {
+        this.durationSeconds = durationSeconds;
+    }
+
+    @Override
+    protected void updateFrame(LedFrame frame, long time, int count) {
+        double progress = clamp(time / (durationSeconds * 1000.0));
+        double elevation = 2.0 - progress;
+        double radius = progress * 2.12;
+        for (int i = 0; i < config.leds.getCount(); i++) {
+            double x = frame.xOf(i);
+            double y = frame.yOf(i);
+            double distance = distanceFromSun(x, y, elevation);
+            double r = clamp(1.0 - distance + radius);
+            double g = clamp(0.5 - distance + radius);
+            double b = clamp(0.0 - distance + radius);
+            frame.setLedColor(i, Color.rgb(r, g, b));
+        }
+    }
+
+    private double clamp(double value) {
+        return Math.min(Math.max(value, 0), 1.0);
+    }
+
+    private double distanceFromSun(double x, double y, double elevation) {
+        return Math.sqrt(Math.pow(0.5 - x, 2) + Math.pow(elevation - y, 2));
+    }
+}
-- 
2.11.0