From 9c2b0a1070c34a1b085199a6f173d673ea7228cb Mon Sep 17 00:00:00 2001
From: Jason Sturges <jason@jasonsturges.com>
Date: Wed, 13 Nov 2024 23:10:51 -0600
Subject: [PATCH] Parametric curve functions

---
 src/constants/ParametricCurve.js | 43 ++++++++++++++++++--------------
 1 file changed, 24 insertions(+), 19 deletions(-)

diff --git a/src/constants/ParametricCurve.js b/src/constants/ParametricCurve.js
index 659653f..f1302a6 100644
--- a/src/constants/ParametricCurve.js
+++ b/src/constants/ParametricCurve.js
@@ -1,19 +1,3 @@
-export const parabolicCurve = (t, a = 1, b = 0, c = 0) => {
-  const clampedT = Math.max(0, Math.min(1, t));
-  return a * clampedT * clampedT + b * clampedT + c;
-};
-
-export const dampedCurve = (t, damping = 1) => {
-  const clampedDamping = Math.max(0.001, damping); // Avoid zero or negative damping
-  return (1 - Math.exp(-clampedDamping * t)) / (1 - Math.exp(-clampedDamping));
-};
-
-export const quadraticCurve = (t, p0, p1, p2) => {
-  const clampedT = Math.max(0, Math.min(1, t));
-  const oneMinusT = 1 - clampedT;
-  return oneMinusT * oneMinusT * p0 + 2 * oneMinusT * clampedT * p1 + clampedT * clampedT * p2;
-};
-
 export const cubicCurve = (t, p0, p1, p2, p3) => {
   const clampedT = Math.max(0, Math.min(1, t));
   const oneMinusT = 1 - clampedT;
@@ -25,6 +9,11 @@ export const cubicCurve = (t, p0, p1, p2, p3) => {
   );
 };
 
+export const dampedCurve = (t, damping = 1) => {
+  const clampedDamping = Math.max(0.001, damping); // Avoid zero or negative damping
+  return (1 - Math.exp(-clampedDamping * t)) / (1 - Math.exp(-clampedDamping));
+};
+
 export const exponentialCurve = (t, base = 1, factor = 1) => {
   const clampedT = Math.max(0, Math.min(1, t));
   return base * Math.pow(clampedT, factor);
@@ -35,17 +24,33 @@ export const logarithmicCurve = (t, base = 1, factor = 1) => {
   return base * Math.log(factor * clampedT + 1);
 };
 
+export const parabolicCurve = (t, a = 1, b = 0, c = 0) => {
+  const clampedT = Math.max(0, Math.min(1, t));
+  return a * clampedT * clampedT + b * clampedT + c;
+};
+
+export const quadraticCurve = (t, p0, p1, p2) => {
+  const clampedT = Math.max(0, Math.min(1, t));
+  const oneMinusT = 1 - clampedT;
+  return oneMinusT * oneMinusT * p0 + 2 * oneMinusT * clampedT * p1 + clampedT * clampedT * p2;
+};
+
 export const sigmoidCurve = (t, a = 10) => {
   const clampedT = Math.max(0, Math.min(1, t));
   return 1 / (1 + Math.exp(-a * (clampedT - 0.5)));
 };
 
+const sinusoidalCurve = (t) => {
+  return Math.sin(t * Math.PI * 0.5);
+};
+
 export const ParametricCurve = {
-  PARABOLIC: parabolicCurve,
-  DAMPED: dampedCurve,
-  QUADRATIC: quadraticCurve,
   CUBIC: cubicCurve,
+  DAMPED: dampedCurve,
   EXPONENTIAL: exponentialCurve,
   LOGARITHMIC: logarithmicCurve,
+  PARABOLIC: parabolicCurve,
+  QUADRATIC: quadraticCurve,
   SIGMOID: sigmoidCurve,
+  SINUSOIDAL: sinusoidalCurve,
 };