overte-JulianGro/script-archive/example/scripts/rayPickExample.js

//
//  rayPickExample.js
//  examples
//
//  Created by Brad Hefta-Gaub on 2/6/14.
//  Copyright 2014 High Fidelity, Inc.
//
//  This is an example script that demonstrates use of the Camera class
//
//  Distributed under the Apache License, Version 2.0.
//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//


var normalDisplay = Entities.addEntity({
    type: "Line",
    name: "normalDisplay",
    visible: false,
    color: { red: 255, green: 0, blue: 0 },
    dimensions: { x: 100, y: 100, z: 100 }
});

var wasVisible = false;

function mouseMoveEvent(event) {
    print("mouseMoveEvent event.x,y=" + event.x + ", " + event.y);
    var pickRay = Camera.computePickRay(event.x, event.y);
    print("called Camera.computePickRay()");
    print("computePickRay origin=" + pickRay.origin.x + ", " + pickRay.origin.y + ", " + pickRay.origin.z);
    print("computePickRay direction=" + pickRay.direction.x + ", " + pickRay.direction.y + ", " + pickRay.direction.z);
    var pickRay = Camera.computePickRay(event.x, event.y);
    intersection = Entities.findRayIntersection(pickRay, true); // to get precise picking
    if (!intersection.accurate) {
        print(">>> NOTE: intersection not accurate. will try calling Entities.findRayIntersectionBlocking()");
        intersection = Entities.findRayIntersectionBlocking(pickRay, true); // to get precise picking
        print(">>> AFTER BLOCKING CALL intersection.accurate=" + intersection.accurate);
    }
    
    if (intersection.intersects) {
        print("intersection entityID=" + intersection.entityID);
        print("intersection face=" + intersection.face);
        print("intersection distance=" + intersection.distance);
        print("intersection intersection.x/y/z=" + intersection.intersection.x + ", "
                    + intersection.intersection.y + ", " + intersection.intersection.z);
        print("intersection surfaceNormal.x/y/z=" + intersection.surfaceNormal.x + ", "
                    + intersection.surfaceNormal.y + ", " + intersection.surfaceNormal.z);


        // Note: line entity takes points in "entity relative frame"
        var lineStart = { x: 0, y: 0, z: 0 };
        var lineEnd = intersection.surfaceNormal;

        Entities.editEntity(normalDisplay, {
            visible: true,
            position: intersection.intersection,
            linePoints: [lineStart, lineEnd],
        });
        wasVisible = true;
    } else {
        if (wasVisible) {
            Entities.editEntity(normalDisplay, { visible: false });
            wasVisible = false;
        }
    }
}

Controller.mouseMoveEvent.connect(mouseMoveEvent);

Script.scriptEnding.connect(function() {
    Entities.deleteEntity(normalDisplay);
});