3d-interface/js/FixedCamera.js

124 lines
3.9 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,10));
this.up = new THREE.Vector3(0,0,1);
// Compute corners
// Create the mesh to draw
var geometry = new THREE.Geometry();
var left = Tools.cross(direction, this.up);
var other = Tools.cross(direction, left);
left.normalize();
other.normalize();
left = Tools.mul(left, 100);
other = Tools.mul(other, 100);
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)
);
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)
);
(function(self, direction, left, other) {
var material = new THREE.LineBasicMaterial({ color: '0x000000'});
var geometry = new THREE.Geometry();
var direction = Tools.mul(direction, -200);
var target = Tools.sum(self.position, direction);
// geometry.vertices.push(self.position, target);
geometry.vertices.push(
Tools.sum(Tools.sum(self.position, left), other),
Tools.diff(Tools.sum(self.position, other),left),
Tools.diff(Tools.diff(self.position, left),other),
Tools.sum(Tools.diff(self.position, other), left),
Tools.sum(Tools.sum(self.position, left), other),
Tools.sum(Tools.diff(self.position, other), left),
Tools.sum(self.position, direction),
Tools.sum(Tools.sum(self.position, left), other),
Tools.sum(self.position, direction),
Tools.diff(Tools.sum(self.position, other),left),
Tools.sum(self.position, direction),
Tools.diff(Tools.diff(self.position, left),other),
Tools.sum(self.position, direction),
Tools.sum(Tools.diff(self.position, other), left)
);
self.line = new THREE.Line(geometry, material);
})(this, direction, left, other);
var material = new THREE.MeshBasicMaterial({
color : 0xff0000,
transparent : true,
opacity : 0.5,
side: THREE.DoubleSide
});
this.mesh = new THREE.Mesh(geometry, material);
}
FixedCamera.prototype = Object.create(THREE.PerspectiveCamera.prototype);
FixedCamera.prototype.constructor = FixedCamera;
// Update function
FixedCamera.prototype.update = function(position) {
// Compute distance between center of camera and position
dist = Tools.norm2(Tools.diff(position, this.position));
var low_bound = 500;
var high_bound = 500000;
if (dist < 500)
this.mesh.material.opacity = 0;
else if (dist > 500000)
this.mesh.material.opacity = 0.5;
else
this.mesh.material.opacity = (dist - 50)*0.5/(high_bound - low_bound);
}
// Look function
FixedCamera.prototype.look = function() {
this.lookAt(this.target);
}
FixedCamera.prototype.addToScene = function(scene) {
scene.add(this);
scene.add(this.mesh);
scene.add(this.line);
}
FixedCamera.prototype.traverse = function(callback) {
callback(this.mesh);
callback(this.line);
}