advanced animation speed management according to hero climbing or getting down

src/lib/Hero.js

@@ -3,10 +3,13 @@ import { QueryFilterFlags } from '@dimforge/rapier3d';
 
 const zero2 = new Vector2(0,0);
 class Hero{
-    walkDirection = new Vector3()
-    rotateAngle = new Vector3(0, 1, 0)
+    #walkDirection = new Vector3()
+    #desiredMovement = new Vector2(0,0)
+    #correctedMovement = new Vector2(0,0);
+    #rotateAngle = new Vector3(0, 1, 0)
     cameraMode = 'rotate';
     #cameraZ = 4
+    #timeScale = 1;
 
     get cameraZ(){
         return this.#cameraZ;
@@ -92,7 +95,7 @@ class Hero{
         this.po.characterController = this.characterController;
         //this.characterController.enableSnapToGround(0.5);
         // // Don’t allow climbing slopes larger than 45 degrees.
-        // this.characterController.setMaxSlopeClimbAngle(45 * Math.PI / 180);
+        //this.characterController.setMaxSlopeClimbAngle(90 * Math.PI / 180);
         // Automatically slide down on slopes smaller than 30 degrees.
         // this.characterController.setMinSlopeSlideAngle(30 * Math.PI / 180);
         // this.characterController.enableAutostep(0.5, 0.2, true);
@@ -169,10 +172,10 @@ class Hero{
 
         let play = this.currentAction || 'idle', velocity = this.walkVelocity;
         this.fadeDuration = 0.2;
-        if (input[1] && pc.running) {
+        if (input[1] && pc.running && this.#timeScale > 0.5) {
             play = 'run';
             velocity = this.runVelocity;
-        } else if (input[1] > 0) {
+        } else if (input[1] > 0 && this.#timeScale > 0.2) {
             play = 'walk'
         } else if (input[1] < 0) {
             play = 'backward'
@@ -216,9 +219,11 @@ class Hero{
             this.actionStart = 0;
         }
 
+        this.animationsMap[this.currentAction].timeScale = this.#timeScale;
+
         this.actionStart += delta;
         this.cameraDelta += delta * ( pc.cameraLeft * -1 +  pc.cameraRight * 1)
-        this.walkDirection.setScalar(0);
+        this.#walkDirection.setScalar(0);
 
         if (pc.cameraUp && this.cameraY < 5){
             this.cameraY+=delta;
@@ -239,35 +244,35 @@ class Hero{
             if (!this.fpv){
                 //this.directionVelocity = this.directionVelocity * 2.5 * Math.abs(input[0])
                 this.direction += input[0] * delta * 2.5 //this.directionVelocity;
-                this.walkDirection.set(0, 0, input[1])
+                this.#walkDirection.set(0, 0, input[1])
             }else{
                 if (this.engine.renderer.xr.isPresenting){
                     this.direction = this.engine.camera.rotation.y;
                 }else{
                     this.direction = this.camera.rotation.y;
                 }
-                this.walkDirection.set(input[0], 0, input[1])
+                this.#walkDirection.set(input[0], 0, input[1])
                 //console.log(this.camera.rotation.y * 180/Math.PI);
                 // this.camera.getWorldDirection(this.walkDirection);
                 // this.walkDirection.applyAxisAngle(this.rotateAngle, input[0]*Math.PI/2 + (input[1]<0 ? Math.PI : 0))
                 //this.walkDirection.multiplyScalar(input[1]);
             }
-            this.walkDirection.applyAxisAngle(this.rotateAngle, this.direction)
-            this.walkDirection.normalize();
+            this.#walkDirection.applyAxisAngle(this.#rotateAngle, this.direction)
+            this.#walkDirection.normalize();
             this.model.rotation.y = this.direction;
         }else if (this.fpv){
             this.model.rotation.y = this.camera.rotation.y;
         }
 
-        this.walkDirection.x = this.walkDirection.x * velocity * delta// + this.model.position.x
-        this.walkDirection.y = -delta * 0.5 * 9.8; //gravity!!!
-        this.walkDirection.z = this.walkDirection.z * velocity * delta// + this.model.position.z
+        this.#walkDirection.x = this.#walkDirection.x * velocity * delta// + this.model.position.x
+        this.#walkDirection.y = -delta * velocity * 0.1 * 9.8; //gravity!!!
+        this.#walkDirection.z = this.#walkDirection.z * velocity * delta// + this.model.position.z
 
         //const translation = this.rigidBody.translation();
 
         this.characterController.computeColliderMovement(
             this.po.collider,    // The collider we would like to move.
-            this.walkDirection, // The movement we would like to apply if there wasn’t any obstacle.
+            this.#walkDirection, // The movement we would like to apply if there wasn’t any obstacle.
             QueryFilterFlags['EXCLUDE_SENSORS']
         );
 
@@ -278,7 +283,15 @@ class Hero{
         // }
 
         let correctedMovement = this.characterController.computedMovement();
-        //console.log(correctedMovement);
+        // this.walkDirection.sub(correctedMovement)
+        // let diff = Math.sqrt(this.walkDirection.x * this.walkDirection.x + 
+        //     this.walkDirection.z * this.walkDirection.z) / delta / velocity
+        let l1 = this.#desiredMovement.set(this.#walkDirection.x, this.#walkDirection.z).lengthSq(), 
+            l2 = this.#correctedMovement.set(correctedMovement.x, correctedMovement.z).lengthSq();
+        let ts = l2 / l1
+        if (ts>0 && ts<10){
+            this.#timeScale = this.lerp(this.#timeScale, Math.sqrt(ts), delta*2);
+        }
 
         let v = new Vector3();
         v.copy(this.po.rigidBody.translation());