3d-interface/static/js/FixedCamera.js

231 lines
7.5 KiB
JavaScript

// Initialization
// class camera extends THREE.PerspectiveCamera
var FixedCamera = function(arg1, arg2, arg3, arg4, position, target) {
THREE.PerspectiveCamera.apply(this, arguments);
// Set Position
if (position === undefined) {
this.position = new THREE.Vector3(0,0,5);
} else {
this.position.x = position.x;
this.position.y = position.y;
this.position.z = position.z;
}
if (target === undefined)
target = new THREE.Vector3(0,0,0);
var direction = target.clone();
direction.sub(this.position);
direction.normalize();
this.target = this.position.clone();
this.target.add(Tools.mul(direction,20));
// this.up = new THREE.Vector3(0,0,1);
// Compute corners
// Create the mesh to draw
var geometry = new THREE.Geometry();
this.center = this.position.clone();
var left = Tools.cross(direction, this.up);
var other = Tools.cross(direction, left);
this.center.sub(direction);
left.normalize();
other.normalize();
left = Tools.mul(left, 0.2);
other = Tools.mul(other, 0.2);
geometry.vertices.push(Tools.sum( Tools.sum( this.position, left), other),
Tools.diff(Tools.sum( this.position, other), left),
Tools.diff(Tools.diff(this.position, left), other),
Tools.sum( Tools.diff(this.position, other), left),
Tools.sum(this.position, direction)
);
geometry.faces.push(new THREE.Face3(0,1,2), // new THREE.Face3(0,2,1),
new THREE.Face3(0,2,3), // new THREE.Face3(0,3,2)
new THREE.Face3(4,1,2),
new THREE.Face3(4,0,1),
new THREE.Face3(4,3,0),
new THREE.Face3(4,2,3)
);
geometry.computeFaceNormals();
(function(self, direction, left, other, position) {
var material = new THREE.LineBasicMaterial({ color: '0x000000', transparent: true});
var geometry = new THREE.Geometry();
// var direction = Tools.mul(direction, 1);
var target = Tools.sum(position, direction);
// geometry.vertices.push(position, target);
geometry.vertices.push(
Tools.sum(Tools.sum(position, left), other),
Tools.diff(Tools.sum(position, other),left),
Tools.diff(Tools.diff(position, left),other),
Tools.sum(Tools.diff(position, other), left),
Tools.sum(Tools.sum(position, left), other),
Tools.sum(Tools.diff(position, other), left),
Tools.sum(position, direction),
Tools.sum(Tools.sum(position, left), other),
Tools.sum(position, direction),
Tools.diff(Tools.sum(position, other),left),
Tools.sum(position, direction),
Tools.diff(Tools.diff(position, left),other),
Tools.sum(position, direction),
Tools.sum(Tools.diff(position, other), left)
);
self.border = new THREE.Line(geometry, material);
})(this, direction, left, other, position);
var material = new THREE.MeshLambertMaterial({
color : 0xff0000,
transparent : true,
opacity : 0.5,
side: THREE.DoubleSide
});
this.mesh = new THREE.Mesh(geometry, material);
this.arrow = new THREE.Mesh(new THREE.Geometry(), new THREE.MeshLambertMaterial({color: 0xff0000, side:THREE.BackSide}));
this.object3D = new THREE.Object3D();
this.object3D.add(this.mesh);
this.object3D.add(this.arrow);
this.fullArrow = false;
}
FixedCamera.prototype = Object.create(THREE.PerspectiveCamera.prototype);
FixedCamera.prototype.constructor = FixedCamera;
// Update function
FixedCamera.prototype.update = function(mainCamera) {
// Compute distance between center of camera and position
dist = Tools.norm2(Tools.diff(mainCamera.position, this.center));
var low_bound = 1;
var high_bound = 5;
var new_value;
if (dist < low_bound) {
new_value = 0;
}
else if (dist > high_bound) {
new_value = 1;
}
else {
new_value = (dist - low_bound)/(high_bound - low_bound);
}
// Update opacity
this.object3D.traverse(function(elt) {
if (elt instanceof THREE.Mesh) {
elt.material.transparent = new_value < 0.9;
elt.material.opacity = new_value;
if (new_value < 0.1)
elt.material.transparent = elt.visible = false;
}
});
this.regenerateArrow(mainCamera);
}
FixedCamera.prototype.regenerateArrow = function(mainCamera) {
var vertices = new Array();
var t = [0,1];
var f0 = mainCamera.position.clone();
f0.add(Tools.sum(Tools.mul(this.up,-1), Tools.diff(this.target, this.position).normalize()));
var f = [Tools.sum(mainCamera.position, Tools.diff(this.target, this.position)).normalize(), this.position.clone()];
var first = Tools.diff(mainCamera.target, mainCamera.position);
first.normalize();
var fp = [Tools.mul(first,40), Tools.diff(this.target, this.position)];
fp[1].normalize();
fp[1].multiplyScalar(4);
var hermite = new Hermite.special.Polynom(f0, f[1], fp[1]);
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 -= 0.01) {
point = hermite.eval(i);
deriv = hermite.prime(i);
up.cross(deriv);
up.cross(deriv);
up.multiplyScalar(-1);
up.normalize();
var coeff = 0.1;
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)
);
}
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));
this.arrow.geometry.vertices = vertices;
this.arrow.geometry.faces = faces;
// 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;
this.arrow.geometry.facesNeedUpdate = true;
}
// Look function
FixedCamera.prototype.look = function() {
this.lookAt(this.target);
}
FixedCamera.prototype.addToScene = function(scene) {
scene.add(this);
scene.add(this.object3D);
}
FixedCamera.prototype.traverse = function(callback) {
this.object3D.traverse(callback);
}