From 142e00794097dfb78c4b758a2d39d26fae070092 Mon Sep 17 00:00:00 2001
From: Star Rauchenberger <fefferburbia@gmail.com>
Date: Sat, 13 Mar 2021 07:25:23 -0500
Subject: Created Interpolation abstraction

This simplifies EffectSystem quite a bit, and will be useful in other classes.
---
 src/interpolation.cpp | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 src/interpolation.cpp

(limited to 'src/interpolation.cpp')

diff --git a/src/interpolation.cpp b/src/interpolation.cpp
new file mode 100644
index 0000000..3c9bcf8
--- /dev/null
+++ b/src/interpolation.cpp
@@ -0,0 +1,19 @@
+#include "interpolation.h"
+
+void Interpolation::start(int length, double amount) {
+  start_ = progress_;
+  dest_ = amount;
+  length_ = length;
+  thus_ = 0;
+}
+
+void Interpolation::tick(double dt) {
+  if (progress_ != dest_) {
+    thus_ += dt;
+    if (thus_ >= length_) {
+      thus_ = length_;
+    }
+
+    progress_ = (dest_ - start_) / length_ * thus_ + start_;
+  }
+}
-- 
cgit 1.4.1