From 105e931035aa462e219e1be02cad1a44d3054e1a Mon Sep 17 00:00:00 2001
From: polygonboutique <sergej.schefer@web.de>
Date: Tue, 22 Nov 2016 17:07:02 +0100
Subject: [PATCH] follow path component

---
 src/game-lib-component-path-following.js      | 88 +++++++++++++++++++
 ...game-lib-component-vehicle-ai-path-boid.js | 59 -------------
 2 files changed, 88 insertions(+), 59 deletions(-)
 create mode 100644 src/game-lib-component-path-following.js
 delete mode 100644 src/game-lib-component-vehicle-ai-path-boid.js

diff --git a/src/game-lib-component-path-following.js b/src/game-lib-component-path-following.js
new file mode 100644
index 0000000..f8b577a
--- /dev/null
+++ b/src/game-lib-component-path-following.js
@@ -0,0 +1,88 @@
+/**
+ *
+ * @param id
+ * @param name
+ * @param splineCurve3
+ * @constructor
+ */
+GameLib.D3.ComponentPathFollowing = function ComponentPathFollowing(
+    id,
+    name,
+    splineCurve3
+) {
+    this.id = id || GameLib.D3.Tools.RandomId();
+
+    if (typeof name == 'undefined') {
+        name = this.constructor.name;
+    }
+
+    this.name = name;
+    this.parentEntity = null;
+    this.splineCurve3 = splineCurve3;
+
+    this.currentPathValue = 0.0;
+
+    GameLib.D3.Utils.Extend(GameLib.D3.ComponentPathFollowing, GameLib.D3.ComponentInterface);
+};
+
+///////////////////////// Methods to override //////////////////////////
+GameLib.D3.ComponentPathFollowing.prototype.onUpdate = function(
+    deltaTime,
+    parentEntity
+) {
+
+    if(this.splineCurve3) {
+
+        if(this.currentPathValue >= 1) {
+            this.currentPathValue = 0;
+        }
+
+        //To maintain a constant speed, you use .getPointAt( t ) instead of .getPoint( t ).
+        //http://stackoverflow.com/questions/18400667/three-js-object-following-a-spline-path-rotation-tanget-issues-constant-sp
+
+        var position = this.splineCurve3.getPointAt(this.currentPathValue); //getPointAt?????
+        var rotation = this.splineCurve3.getTangentAt(this.currentPathValue).normalize();
+
+        var up = new THREE.Vector3( 0, 1, 0 );
+
+        var axis = new THREE.Vector3();
+            axis.crossVectors(up, rotation).normalize();
+        var radians = Math.acos(up.dot(rotation));
+        var quaternion = new THREE.Quaternion().setFromAxisAngle( axis, radians );
+
+  /*      var quaternion = new THREE.Quaternion().setFromEuler(
+            new THREE.Euler(
+                rotation.x,
+                rotation.y,
+                rotation.z
+            )
+        );*/
+
+        var offset = new THREE.Vector3(1, 0, 0);
+        offset = offset.applyQuaternion(quaternion).multiplyScalar(10.0);
+
+        console.log("offset x", offset);
+
+        // apply to parent rigidbody instead of direclty to the mesh.
+        parentEntity.position.x = position.x + offset.x;
+        parentEntity.position.y = position.y + offset.y;
+        parentEntity.position.z = position.z + offset.z;
+
+        parentEntity.quaternion.x = quaternion.x;
+        parentEntity.quaternion.y = quaternion.y;
+        parentEntity.quaternion.z = quaternion.z;
+        parentEntity.quaternion.w = quaternion.w;
+
+        this.currentPathValue += (0.5 * deltaTime);
+
+    }
+};
+
+GameLib.D3.ComponentPathFollowing.prototype.onSetParentEntity = function(
+    parentScene,
+    parentEntity
+) {
+    if(!this.splineCurve3) {
+        console.error("NO PATH GIVEN");
+    }
+};
\ No newline at end of file
diff --git a/src/game-lib-component-vehicle-ai-path-boid.js b/src/game-lib-component-vehicle-ai-path-boid.js
deleted file mode 100644
index 0c213cb..0000000
--- a/src/game-lib-component-vehicle-ai-path-boid.js
+++ /dev/null
@@ -1,59 +0,0 @@
-/**
- *
- * @param id
- * @param name
- * @param targetEntity GameLib.D3.Entity
- * @param nodePath
- * @constructor
- */
-GameLib.D3.ComponentVehicleAIPathBoid = function(
-    id,
-    name,
-    targetEntity,
-    nodePath
-) {
-    this.id = id|| GameLib.D3.Tools.RandomId();
-    if (typeof name == 'undefined') {
-        name = this.constructor.name;
-    }
-    this.name = name;
-
-    this.parentEntity = null;
-    GameLib.D3.Utils.Extend(GameLib.D3.ComponentVehicleAIPathBoid, GameLib.D3.ComponentInterface);
-
-    this.targetEntity = targetEntity;
-    this.raycastVehicleComponent = null;
-    this.nodePath = nodePath;
-    this.debugArrows = {};
-};
-
-/////////////////////////////////////////////////////////////////////////
-///////////////////////// Methods to override ///////////////////////////
-/////////////////////////////////////////////////////////////////////////
-GameLib.D3.ComponentVehicleAIPathBoid.prototype.onSetParentEntity = function(
-    parentScene,
-    parentEntity
-) {
-    this.parentEntity = parentEntity;
-    this.raycastVehicleComponent = parentEntity.getComponent(GameLib.D3.RaycastVehicle);
-
-    if(!this.raycastVehicleComponent) {
-        console.warn("NO RAYCAST VEHICLE FOUND!");
-    }
-};
-
-GameLib.D3.ComponentVehicleAIPathBoid.prototype.onUpdate = function(
-    deltaTime,
-    parentEntity
-) {
-    if(this.targetEntity && this.raycastVehicleComponent && this.nodePath) {
-
-        // boid code.
-
-        var currentNodeIndex = this.nodePath.indexOf(this.targetEntity);
-        var distanceToCurrentNode = this.parentEntity.position.distanceTo(this.targetEntity.position);
-
-
-
-    }
-};
\ No newline at end of file