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Merge pull request #3814 from ZappoMan/movables

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first cut at movable entities script
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Clément Brisset 2014-11-17 15:09:35 -08:00
commit b72e578083
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examples/entityScripts/movable.js Normal file
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//
// movable.js
// examples/entityScripts
//
// Created by Brad Hefta-Gaub on 11/17/14.
// Copyright 2014 High Fidelity, Inc.
//
// Distributed under the Apache License, Version 2.0.
// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//
(function(){
this.entityID = null;
this.properties = null;
this.graboffset = null;
// Pr, Vr are respectively the Ray's Point of origin and Vector director
// Pp, Np are respectively the Plane's Point of origin and Normal vector
this.rayPlaneIntersection = function(Pr, Vr, Pp, Np) {
var d = -Vec3.dot(Pp, Np);
var t = -(Vec3.dot(Pr, Np) + d) / Vec3.dot(Vr, Np);
return Vec3.sum(Pr, Vec3.multiply(t, Vr));
};
// updates the piece position based on mouse input
this.updatePosition = function(mouseEvent) {
var pickRay = Camera.computePickRay(mouseEvent.x, mouseEvent.y)
var upVector = { x: 0, y: 1, z: 0 };
var intersection = this.rayPlaneIntersection(pickRay.origin, pickRay.direction,
this.properties.position, upVector);
var newPosition = Vec3.sum(intersection, this.graboffset);
Entities.editEntity(this.entityID, { position: newPosition });
};
this.grab = function(mouseEvent) {
// first calculate the offset
var pickRay = Camera.computePickRay(mouseEvent.x, mouseEvent.y)
var upVector = { x: 0, y: 1, z: 0 };
var intersection = this.rayPlaneIntersection(pickRay.origin, pickRay.direction,
this.properties.position, upVector);
this.graboffset = Vec3.subtract(this.properties.position, intersection);
this.updatePosition(mouseEvent);
};
this.move = function(mouseEvent) {
this.updatePosition(mouseEvent);
};
this.release = function(mouseEvent) {
this.updatePosition(mouseEvent);
};
// All callbacks start by updating the properties
this.updateProperties = function(entityID) {
if (this.entityID === null || !this.entityID.isKnownID) {
this.entityID = Entities.identifyEntity(entityID);
}
this.properties = Entities.getEntityProperties(this.entityID);
};
this.preload = function(entityID) {
this.updateProperties(entityID); // All callbacks start by updating the properties
};
this.clickDownOnEntity = function(entityID, mouseEvent) {
this.updateProperties(entityID); // All callbacks start by updating the properties
this.grab(mouseEvent);
};
this.holdingClickOnEntity = function(entityID, mouseEvent) {
this.updateProperties(entityID); // All callbacks start by updating the properties
this.move(mouseEvent);
};
this.clickReleaseOnEntity = function(entityID, mouseEvent) {
this.updateProperties(entityID); // All callbacks start by updating the properties
this.release(mouseEvent);
};
})