From 1b51b31fbad68274d45c626ad7f2b97a6c517c31 Mon Sep 17 00:00:00 2001
From: Nikos M <workingclasscode@gmail.com>
Date: Wed, 14 Dec 2022 19:18:39 +0200
Subject: [PATCH] Tween remove extra shape curves

---
 build/Geometrize.js     | 47 +++++++++++++++++++++++++++++------------
 build/Geometrize.min.js |  4 ++--
 src/Tween.js            | 43 ++++++++++++++++++++++++++-----------
 3 files changed, 66 insertions(+), 28 deletions(-)

diff --git a/build/Geometrize.js b/build/Geometrize.js
index a6e4522..1a98565 100644
--- a/build/Geometrize.js
+++ b/build/Geometrize.js
@@ -2,14 +2,14 @@
 *   Geometrize
 *   computational geometry and rendering library for JavaScript
 *
-*   @version 0.9.6 (2022-12-14 18:40:23)
+*   @version 0.9.6 (2022-12-14 19:17:17)
 *   https://github.com/foo123/Geometrize
 *
 **//**
 *   Geometrize
 *   computational geometry and rendering library for JavaScript
 *
-*   @version 0.9.6 (2022-12-14 18:40:23)
+*   @version 0.9.6 (2022-12-14 19:17:17)
 *   https://github.com/foo123/Geometrize
 *
 **/
@@ -4431,26 +4431,36 @@ function prepare_tween(tween, fps)
     }).sort(function(a, b) {
         return a.frame - b.frame
     });
-    var maxCurves = 0;
-    var match_shapes = function match_shapes(kf1, kf2, index, dir) {
-        var s1 = kf1.shape[index], s2 = kf2.shape[index+dir],
+    //var maxCurves = 0;
+    var match_shapes = function match_shapes(kf1, kf2, index1, index2) {
+        var s1 = kf1.shape[index1], s2 = kf2.shape[index2],
             l1 = s1.length, l2 = s2.length,
             m = stdMath.max(l1, l2),
             i, i1, i2, p, b1, b2;
         for (i1=0,i2=0,i=0; i<m; ++i)
         {
-            if (i1 >= l1)
+            if (i1 >= l1 && i2 >= l2)
             {
                 p = 0 < l1 ? s1[l1-1][3] : {x:0, y:0};
                 s1.push([{x:p.x, y:p.y}, {x:p.x, y:p.y}, {x:p.x, y:p.y}, {x:p.x, y:p.y}]);
                 ++l1; ++i1;
+                p = 0 < l2 ? s2[l2-1][3] : {x:0, y:0};
+                s2.push([{x:p.x, y:p.y}, {x:p.x, y:p.y}, {x:p.x, y:p.y}, {x:p.x, y:p.y}]);
+                ++l2; ++i2;
+                continue;
+            }
+            else if (i1 >= l1)
+            {
+                p = 0 < l1 ? s1[l1-1][3] : {x:0, y:0};
+                s1.push([{x:p.x, y:p.y}, {x:p.x, y:p.y}, {x:p.x, y:p.y}, {x:p.x, y:p.y}]);
+                ++l1; ++i1; ++i2;
                 continue;
             }
-            if (i2 >= l2)
+            else if (i2 >= l2)
             {
                 p = 0 < l2 ? s2[l2-1][3] : {x:0, y:0};
                 s2.push([{x:p.x, y:p.y}, {x:p.x, y:p.y}, {x:p.x, y:p.y}, {x:p.x, y:p.y}]);
-                ++l2; ++i2;
+                ++l2; ++i2; ++i1;
                 continue;
             }
             b1 = s1[i1];
@@ -4474,22 +4484,31 @@ function prepare_tween(tween, fps)
                 ++i2;
             }
         }
+        //s1.length must equal s2.length after matching
     };
-    var add_curves = function add_curves(shape, numCurves) {
+    /*var add_curves = function add_curves(shape, numCurves) {
         var p = shape.length ? shape[shape.length - 1][3] : {x:0, y:0};
         while (shape.length < numCurves) shape.push([{x:p.x, y:p.y}, {x:p.x, y:p.y}, {x:p.x, y:p.y}, {x:p.x, y:p.y}]);
-    };
+    };*/
     t.keyframes.forEach(function(_, i) {
         if (i+1 < t.keyframes.length)
         {
             match_shapes(t.keyframes[i], t.keyframes[i+1], 0, 1);
         }
-        maxCurves = stdMath.max(maxCurves, t.keyframes[i].shape[0].length);
+        if (0 === i)
+        {
+            t.keyframes[i].shape[1] = t.keyframes[i].shape[0].slice();
+        }
+        if (i+1 === t.keyframes.length)
+        {
+            t.keyframes[i].shape[0] = t.keyframes[i].shape[1].slice();
+        }
+        //maxCurves = stdMath.max(maxCurves, t.keyframes[i].shape[0].length);
     });
-    t.keyframes.forEach(function(kf, i) {
+    /*t.keyframes.forEach(function(kf, i) {
         add_curves(kf.shape[0], maxCurves);
         add_curves(kf.shape[1], maxCurves);
-    });
+    });*/
     return t;
 }
 function first_frame(tween)
@@ -4602,7 +4621,7 @@ function next_frame(tween)
         as = a.shape[tween.reverse ? 1 : 0],
         bs = b.shape[tween.reverse ? 0 : 1],
         ai, bi, aij, bij,
-        i, j, n = as.length, x, y,
+        i, j, n = stdMath.min(as.length, bs.length), x, y,
         s, cs = new Array(n)
     ;
     if (!is_almost_equal(angle, 0))
diff --git a/build/Geometrize.min.js b/build/Geometrize.min.js
index 872989b..58894bd 100644
--- a/build/Geometrize.min.js
+++ b/build/Geometrize.min.js
@@ -2,7 +2,7 @@
 *   Geometrize
 *   computational geometry and rendering library for JavaScript
 *
-*   @version 0.9.6 (2022-12-14 18:40:23)
+*   @version 0.9.6 (2022-12-14 19:17:17)
 *   https://github.com/foo123/Geometrize
 *
-**/!function(t,n,e){"use strict";"object"==typeof module&&module.exports?(module.$deps=module.$deps||{})&&(module.exports=module.$deps[n]=e.call(t)):"function"==typeof define&&define.amd&&"function"==typeof require&&"function"==typeof require.specified&&require.specified(n)?define(n,["module"],function(n){return e.moduleUri=n.uri,e.call(t)}):n in t||(t[n]=e.call(t)||1)&&"function"==typeof define&&define.amd&&define(function(){return t[n]})}("undefined"!=typeof self?self:this,"Geometrize",function(){"use strict";var v=Object.prototype.hasOwnProperty,t=Object.prototype.toString,b=Object.defineProperty,S=Math,G=S.abs,C=S.sqrt,l=S.pow,$=S.PI,w=2*$,u=1e-6,o=$/2,a=3*$/2,r=C(2),c=C(3),f=20,h=.01,_={},y=function(){},n="undefined"!=typeof global&&"[object global]"===t.call(global),x="undefined"!=typeof window&&"[object Window]"===t.call(window),i=(n?global:x&&window,{VERSION:"0.9.6",Math:{},Geometry:{}});function e(n,t,e){var r,i,o,a=v.call(t,"constructor")?t.constructor:function(){};for(r in 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\ No newline at end of file
diff --git a/src/Tween.js b/src/Tween.js
index 148d44a..bbbc69c 100644
--- a/src/Tween.js
+++ b/src/Tween.js
@@ -218,26 +218,36 @@ function prepare_tween(tween, fps)
     }).sort(function(a, b) {
         return a.frame - b.frame
     });
-    var maxCurves = 0;
-    var match_shapes = function match_shapes(kf1, kf2, index, dir) {
-        var s1 = kf1.shape[index], s2 = kf2.shape[index+dir],
+    //var maxCurves = 0;
+    var match_shapes = function match_shapes(kf1, kf2, index1, index2) {
+        var s1 = kf1.shape[index1], s2 = kf2.shape[index2],
             l1 = s1.length, l2 = s2.length,
             m = stdMath.max(l1, l2),
             i, i1, i2, p, b1, b2;
         for (i1=0,i2=0,i=0; i<m; ++i)
         {
-            if (i1 >= l1)
+            if (i1 >= l1 && i2 >= l2)
             {
                 p = 0 < l1 ? s1[l1-1][3] : {x:0, y:0};
                 s1.push([{x:p.x, y:p.y}, {x:p.x, y:p.y}, {x:p.x, y:p.y}, {x:p.x, y:p.y}]);
                 ++l1; ++i1;
+                p = 0 < l2 ? s2[l2-1][3] : {x:0, y:0};
+                s2.push([{x:p.x, y:p.y}, {x:p.x, y:p.y}, {x:p.x, y:p.y}, {x:p.x, y:p.y}]);
+                ++l2; ++i2;
+                continue;
+            }
+            else if (i1 >= l1)
+            {
+                p = 0 < l1 ? s1[l1-1][3] : {x:0, y:0};
+                s1.push([{x:p.x, y:p.y}, {x:p.x, y:p.y}, {x:p.x, y:p.y}, {x:p.x, y:p.y}]);
+                ++l1; ++i1; ++i2;
                 continue;
             }
-            if (i2 >= l2)
+            else if (i2 >= l2)
             {
                 p = 0 < l2 ? s2[l2-1][3] : {x:0, y:0};
                 s2.push([{x:p.x, y:p.y}, {x:p.x, y:p.y}, {x:p.x, y:p.y}, {x:p.x, y:p.y}]);
-                ++l2; ++i2;
+                ++l2; ++i2; ++i1;
                 continue;
             }
             b1 = s1[i1];
@@ -261,22 +271,31 @@ function prepare_tween(tween, fps)
                 ++i2;
             }
         }
+        //s1.length must equal s2.length after matching
     };
-    var add_curves = function add_curves(shape, numCurves) {
+    /*var add_curves = function add_curves(shape, numCurves) {
         var p = shape.length ? shape[shape.length - 1][3] : {x:0, y:0};
         while (shape.length < numCurves) shape.push([{x:p.x, y:p.y}, {x:p.x, y:p.y}, {x:p.x, y:p.y}, {x:p.x, y:p.y}]);
-    };
+    };*/
     t.keyframes.forEach(function(_, i) {
         if (i+1 < t.keyframes.length)
         {
             match_shapes(t.keyframes[i], t.keyframes[i+1], 0, 1);
         }
-        maxCurves = stdMath.max(maxCurves, t.keyframes[i].shape[0].length);
+        if (0 === i)
+        {
+            t.keyframes[i].shape[1] = t.keyframes[i].shape[0].slice();
+        }
+        if (i+1 === t.keyframes.length)
+        {
+            t.keyframes[i].shape[0] = t.keyframes[i].shape[1].slice();
+        }
+        //maxCurves = stdMath.max(maxCurves, t.keyframes[i].shape[0].length);
     });
-    t.keyframes.forEach(function(kf, i) {
+    /*t.keyframes.forEach(function(kf, i) {
         add_curves(kf.shape[0], maxCurves);
         add_curves(kf.shape[1], maxCurves);
-    });
+    });*/
     return t;
 }
 function first_frame(tween)
@@ -389,7 +408,7 @@ function next_frame(tween)
         as = a.shape[tween.reverse ? 1 : 0],
         bs = b.shape[tween.reverse ? 0 : 1],
         ai, bi, aij, bij,
-        i, j, n = as.length, x, y,
+        i, j, n = stdMath.min(as.length, bs.length), x, y,
         s, cs = new Array(n)
     ;
     if (!is_almost_equal(angle, 0))