clean up spline

Author: jafu888

constraintlayout/core/src/main/java/androidx/constraintlayout/core/motion/Motion.java

@@ -82,7 +82,7 @@ public class Motion implements TypedValues {
     MotionWidget mView;
     public String mId;
     String mConstraintTag;
-    private int mCurveFitType = UNSET;
+    private int mCurveFitType = CurveFit.SPLINE;
     private MotionPaths mStartMotionPath = new MotionPaths();
     private MotionPaths mEndMotionPath = new MotionPaths();
 
@@ -945,6 +945,7 @@ public void setup(int parentWidth,
             mSpline[i + 1] = CurveFit.get(mCurveFitType, timePoints, splinePoints);
         }
 
+        // Spline for positions
         mSpline[0] = CurveFit.get(mCurveFitType, timePoint, splineData);
         // --------------------------- SUPPORT ARC MODE --------------
         if (points[0].mPathMotionArc != UNSET) {

constraintlayout/core/src/main/java/androidx/constraintlayout/core/state/TransitionParser.java

@@ -18,6 +18,7 @@
 
 import androidx.constraintlayout.core.motion.utils.TypedBundle;
 import androidx.constraintlayout.core.motion.utils.TypedValues;
+import androidx.constraintlayout.core.motion.utils.Utils;
 import androidx.constraintlayout.core.parser.CLArray;
 import androidx.constraintlayout.core.parser.CLContainer;
 import androidx.constraintlayout.core.parser.CLElement;
@@ -133,7 +134,7 @@ private static int map(String val, String... types) {
     private static void map(TypedBundle bundle, int type, String val, String... types) {
         for (int i = 0; i < types.length; i++) {
             if (types[i].equals(val)) {
-                bundle.add(TypedValues.PositionType.TYPE_PATH_MOTION_ARC, i);
+                bundle.add(type, i);
             }
         }
     }

projects/ComposeConstraintLayout/app/src/main/java/com/example/constraintlayout/ConstraintMotionProps.kt

@@ -861,15 +861,25 @@ fun MotionOrbit2() {
              },
              box2: {
                 width: 50, height: 50,
-                circular: ['box1', 900, 70],
+                circular: ['box1', 1800, 70],
              }
            }
          },
          Transitions: {
            default: {
               from: 'start',
               to: 'end',
-               pathMotionArc : 'none',
+               KeyFrames: {
+                KeyPositions: [
+          {
+            target: ['box1'],
+            type: 'deltaRelative',
+            frames: [50],
+            percentX: [    0.7],
+            percentY: [    0.5]
+          }
+        ]
+               },
               onSwipe: {
                 anchor: 'box1',
                 maxVelocity: 4.2,