From f1ae01eec0cc396ab6d68a3c84688ca1a9c9afdd Mon Sep 17 00:00:00 2001
From: Tangent Wantwight <tangent128@gmail.com>
Date: Tue, 24 Dec 2019 15:44:08 -0500
Subject: [PATCH] Add red & green pattern

---
 harrogate/Cargo.toml              |  1 +
 harrogate/src/december_24_2019.rs | 68 +++++++++++++++++++++++++++++++
 harrogate/src/main.rs             |  4 ++
 3 files changed, 73 insertions(+)
 create mode 100644 harrogate/src/december_24_2019.rs

diff --git a/harrogate/Cargo.toml b/harrogate/Cargo.toml
index 998c9b7..2fffc55 100644
--- a/harrogate/Cargo.toml
+++ b/harrogate/Cargo.toml
@@ -15,6 +15,7 @@ replace-default = []
 
 december-01-2019 = ["replace-default"]
 december-21-2019 = ["replace-default"]
+december-24-2019 = ["replace-default"]
 
 [dependencies]
 house = { path = "../house" }
diff --git a/harrogate/src/december_24_2019.rs b/harrogate/src/december_24_2019.rs
new file mode 100644
index 0000000..f6a3de9
--- /dev/null
+++ b/harrogate/src/december_24_2019.rs
@@ -0,0 +1,68 @@
+//! ramp gradient of red and green
+use super::delay;
+use house::Harrogate;
+use lights::rgb::{blend_steps, Rgb};
+use lights::{HardwareRgb, Lights};
+
+const OFF: Rgb = Rgb(0, 0, 0);
+const GREEN: Rgb = Rgb(0, 200, 0);
+const RED: Rgb = Rgb(200, 0, 0);
+
+const SEGMENT_LEN: usize = 35;
+const ZOOM: usize = 10;
+const ZOOM_SEGMENT_LEN: usize = SEGMENT_LEN * ZOOM;
+const OVERLAP: usize = 60;
+const RAMP_LEN: usize = ZOOM_SEGMENT_LEN / 4 + OVERLAP;
+
+const HALF_PORCH: usize = 75;
+const FULL_PORCH: usize = 150;
+
+#[allow(dead_code)]
+#[inline(always)]
+pub fn run(lights: &mut impl Lights<Pixel = HardwareRgb>) -> ! {
+    let mut t = 0;
+
+    loop {
+        // advance "time" for pattern
+        t += 1;
+        if t > ZOOM_SEGMENT_LEN {
+            t = 0;
+        }
+
+        let ramp_func = |x, center, color| {
+            if x < center {
+                if x < (center - RAMP_LEN) {
+                    OFF
+                } else {
+                    blend_steps(OFF, color, RAMP_LEN, x - (center - RAMP_LEN))
+                }
+            } else {
+                if x > (center + RAMP_LEN) {
+                    OFF
+                } else {
+                    blend_steps(color, OFF, RAMP_LEN, x - center)
+                }
+            }
+        };
+
+        let half_pattern_func = |i| {
+            let x = (i * ZOOM) + t;
+            let x = x % ZOOM_SEGMENT_LEN;
+            ramp_func(x, 0, RED)
+                + ramp_func(x, ZOOM_SEGMENT_LEN, RED)
+                + ramp_func(x, ZOOM_SEGMENT_LEN / 2, GREEN)
+        };
+        let pattern_func = |i| match i {
+            i if i < HALF_PORCH => half_pattern_func(i),
+            i => half_pattern_func(FULL_PORCH - i),
+        };
+
+        Harrogate {
+            porch_back: (0..FULL_PORCH).map(|_| pattern_func(HALF_PORCH)),
+            porch_front: (0..FULL_PORCH).map(pattern_func),
+        }
+        .render_to(lights);
+
+        delay(300_000);
+    }
+}
diff --git a/harrogate/src/main.rs b/harrogate/src/main.rs
index 967ea15..0e7d901 100644
--- a/harrogate/src/main.rs
+++ b/harrogate/src/main.rs
@@ -7,6 +7,7 @@ pub use lights_hal::delay;
 
 mod december_01_2019;
 mod december_21_2019;
+mod december_24_2019;
 mod door_light;
 
 #[entry]
@@ -19,6 +20,9 @@ fn main() -> ! {
     #[cfg(feature = "december-21-2019")]
     december_21_2019::run(&mut lights);
 
+    #[cfg(feature = "december-24-2019")]
+    december_24_2019::run(&mut lights);
+
     #[cfg(not(feature = "replace-default"))]
     door_light::run(&mut lights);
 }