From 2ebdf0e8fb4b6fd5d8af6a907e9c4d18fc3d894c Mon Sep 17 00:00:00 2001
From: Dominic Masters <dominic@domsplace.com>
Date: Thu, 15 Jul 2021 04:38:31 -0700
Subject: [PATCH] Easing tests.

---
 include/dawn/animation/easing.h | 26 ++++++++++++++++++++++++++
 include/dawn/dawn.h             |  3 +++
 src/poker/round/match.c         |  7 ++++---
 3 files changed, 33 insertions(+), 3 deletions(-)
 create mode 100644 include/dawn/animation/easing.h

diff --git a/include/dawn/animation/easing.h b/include/dawn/animation/easing.h
new file mode 100644
index 00000000..87dd7207
--- /dev/null
+++ b/include/dawn/animation/easing.h
@@ -0,0 +1,26 @@
+/**
+ * Copyright (c) 2021 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+#pragma once
+#include "../libs.h"
+
+/**
+ * Returns the ease time for a given real time duration span.
+ * @param start At what point in time the animation started
+ * @param current The current point in time the animation is at.
+ * @param duration The total duration on the animation.
+ * @returns The easing time (0-1 time) that the animation is at.
+ */
+#define easeTimeToEase(start, current, duration) ((current-start)/duration)
+
+#define easeLinear(t) t
+
+#define easeInQuad(t) t*t
+#define easeOutQuad(t) t*(2-t)
+#define easeInOutQuad(t) (t < .5 ? 2*t*t : -1+(4-2*t)*t)
+
+#define easeInCubic(t) t*t*t
+#define easeOutCubic(t) t*(t-1)*(t-1)+1
\ No newline at end of file
diff --git a/include/dawn/dawn.h b/include/dawn/dawn.h
index 5625f904..b30d82b4 100644
--- a/include/dawn/dawn.h
+++ b/include/dawn/dawn.h
@@ -6,6 +6,9 @@
 #pragma once
 #include "libs.h"
 
+// Animation
+#include "animation/easing.h"
+
 // Display / Rendering
 #include "display/debug/grid.h"
 
diff --git a/src/poker/round/match.c b/src/poker/round/match.c
index d050c312..5e93f7b1 100644
--- a/src/poker/round/match.c
+++ b/src/poker/round/match.c
@@ -27,7 +27,8 @@ void pokerMatchInit(poker_t *poker, engine_t *engine) {
 }
 
 void pokerMatchUpdate(poker_t *poker, engine_t *engine) {
-  // float matchDiff = poker->matchStart - engine->time.current;
-  float diff = engine->time.current - poker->roundMatch.time;
-  pokerLookAtPlayer(&poker->cameraWorld, POKER_SEAT_PLAYER0, 3 - (diff/2));
+  pokerLookAtPlayer(
+    &poker->cameraWorld, POKER_SEAT_PLAYER0,
+    easeOutCubic(easeTimeToEase(poker->roundMatch.time,engine->time.current,5))
+  );
 }
\ No newline at end of file