From 14e34c0e94bdbcf041c6cc1a0b0f4aa4f1cd7e89 Mon Sep 17 00:00:00 2001
From: Thomas FORGIONE <thomas.forgione@gmail.com>
Date: Fri, 29 May 2015 10:29:32 +0200
Subject: [PATCH] Changed reverse camera

---
 js/prototype/ReverseCamera.js | 108 ++++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)

diff --git a/js/prototype/ReverseCamera.js b/js/prototype/ReverseCamera.js
index 5acb693..a46f4db 100644
--- a/js/prototype/ReverseCamera.js
+++ b/js/prototype/ReverseCamera.js
@@ -72,3 +72,111 @@ ReverseCamera.prototype.initExtremity = function() {
     return this.mesh;
 
 }
+
+ReverseCamera.prototype.regenerateArrow = function(mainCamera) {
+    var vertices = new Array();
+
+    // First point of curve
+    var f0 = mainCamera.position.clone();
+    f0.add(Tools.mul(Tools.sum(new THREE.Vector3(0,-0.5,0), Tools.diff(this.target, this.position).normalize()),2));
+
+    // Last point of curve
+    var f1 = this.position.clone();
+
+    // Last derivative of curve
+    var fp1 = Tools.diff(this.target, this.position);
+    fp1.normalize();
+    fp1.multiplyScalar(2);
+
+    // Camera direction
+    var dir = Tools.diff(this.position, mainCamera.position);
+    dir.normalize();
+
+    if (fp1.dot(dir) < -0.5) {
+        // Regen polynom with better stuff
+        // var new_dir = Tools.cross(Tools.diff(this.position, mainCamera.position).normalize(), mainCamera.up);
+        // new_dir.multiplyScalar(new_dir.dot(fp1) < 0 ? 1 : -1);
+        // new_dir.add(dir);
+        // new_dir.add(dir);
+        // new_dir.multiplyScalar(2);
+        // f0.add(new_dir);
+
+        if (mainCamera.position.y > this.position.y) {
+            f0.add(new THREE.Vector3(0,2,0));
+        } else {
+            f0.add(new THREE.Vector3(0,-2,0));
+        }
+
+    }
+
+    fp1.multiplyScalar(4);
+
+    var hermite = new Hermite.special.Polynom(f0, f1, fp1);
+
+    var up = this.up.clone();
+    var point;
+    var deriv;
+    var limit = this.fullArrow ? 0.1 : 0.3;
+
+    // for (var i = this.fullArrow ? 0 : 0.5; i <= 1.001; i += 0.05) {
+    for (var i = 1; i > limit; i -= 0.1) {
+        point = hermite.eval(i);
+        deriv = hermite.prime(i);
+        up.cross(deriv);
+        up.cross(deriv);
+        up.multiplyScalar(-1);
+        up.normalize();
+
+        var coeff = i * i * this.size / 2;
+        var left = Tools.cross(up, deriv);     left.normalize(); left.multiplyScalar(coeff);
+        var other = Tools.cross(deriv, left);  other.normalize(); other.multiplyScalar(coeff);
+
+        vertices.push(
+            Tools.sum(Tools.sum(point, left), other),
+            Tools.sum(Tools.diff(point, left), other),
+            Tools.diff(point, Tools.sum(other,left)),
+            Tools.sum(Tools.diff(point, other), left)
+        );
+    }
+
+    this.arrow.geometry.vertices = vertices;
+
+    if (this.arrow.geometry.faces.length == 0) {
+        var faces = new Array();
+
+        for (var i = 0; i < vertices.length - 4; i+= 4) {
+            faces.push(new THREE.Face3(i,i+1,i+5),new THREE.Face3(i,i+5,i+4),
+                       new THREE.Face3(i+1,i+2,i+6),new THREE.Face3(i+1,i+6,i+5),
+                       new THREE.Face3(i+2,i+3,i+7),new THREE.Face3(i+2,i+7,i+6),
+                       new THREE.Face3(i,i+7,i+3), new THREE.Face3(i,i+4,i+7));
+        }
+
+        var len = vertices.length;
+        faces.push(new THREE.Face3(len-4,len-3,len-2), new THREE.Face3(len-4,len-2,len-1));
+
+        var max = 0;
+        for (var i = 0; i < faces.length; i++) {
+            max = Math.max(max, faces[i].a, faces[i].b, faces[i].c);
+        }
+        console.log(max + '/' + len);
+
+
+        this.arrow.geometry.faces = faces;
+        this.arrow.geometry.facesNeedUpdate = true;
+    }
+
+    // this.arrow.geometry.mergeVertices();
+    this.arrow.geometry.computeFaceNormals();
+    // this.arrow.geometry.computeVertexNormals();
+    this.arrow.geometry.computeBoundingSphere();
+
+    // this.arrow.geometry.vertices[0] = new THREE.Vector3(); // mainCamera.position.clone();
+    // this.arrow.geometry.vertices[1] = this.position.clone();
+
+    this.arrow.geometry.dynamic = true;
+    this.arrow.geometry.verticesNeedUpdate = true;
+    this.arrow.geometry.elementsNeedUpdate = true;
+    this.arrow.geometry.groupsNeedUpdate = true;
+    this.arrow.geometry.normalsNeedUpdate = true;
+
+}