path: root/js/helper-classes/RDGE/GLSubpath.js

/* <copyright>
This file contains proprietary software owned by Motorola Mobility, Inc.<br/>
No rights, expressed or implied, whatsoever to this software are provided by Motorola Mobility, Inc. hereunder.<br/>
(c) Copyright 2011 Motorola Mobility, Inc.  All Rights Reserved.
</copyright> */

// Todo: This shoudl be converted to a module
var VecUtils = require("js/helper-classes/3D/vec-utils").VecUtils;


function SubpathOffsetPoint(pos, mapPos) {
    this.Pos = Vector.create([pos[0],pos[1],pos[2]]);
    this.CurveMapPos = Vector.create([mapPos[0], mapPos[1], mapPos[2]]);
}

function SubpathOffsetTriangle(v0, v1, v2) {
    this.v0 = v0;
    this.v1 = v1;
    this.v2 = v2;
    this.n = Vector.create([0,0,1]); //replace with the actual cross product later
}

function sortNumberAscending(a,b){
    return a-b;
}
function sortNumberDescending(a,b){
    return b-a;
}
function SegmentIntersections(){
    this.paramArray = [];
}

///////////////////////////////////////////////////////////////////////
// Class GLSubpath
//      representation a sequence of cubic bezier curves.
//      Derived from class GLGeomObj
///////////////////////////////////////////////////////////////////////
function GLSubpath() {
    ///////////////////////////////////////////////////
    // Instance variables
    ///////////////////////////////////////////////////
    this._Anchors = [];
    this._BBoxMin = [0, 0, 0];
    this._BBoxMax = [0, 0, 0];
    this._isClosed = false;

    this._samples = [];                 //polyline representation of this curve
    this._sampleParam = [];            //parametric distance of samples, within [0, N], where N is # of Bezier curves (=# of anchor points if closed, =#anchor pts -1 if open)
    this._anchorSampleIndex = [];       //index within _samples corresponding to anchor points
    
    this._UnprojectedAnchors = [];

    //offset path samples and the points on the input path they map to
    this._offsetPointsLeft = [];
    this._offsetPointsRight = [];

    //triangles determined by the offset points
    this._offsetTrianglesLeft = [];
    this._offsetTrianglesRight = [];

    //initially set the _dirty bit so we will construct samples
    this._dirty = true;

    //whether or not to use the canvas drawing to stroke/fill
    this._useCanvasDrawing = true;

    //the X and Y location of this subpath's canvas in stage world space of Ninja
    this._canvasX = 0;
    this._canvasY = 0;

    //stroke information
    this._strokeWidth = 0.0;
    this._strokeColor = [0.4, 0.4, 0.4, 1.0];
    this._strokeMaterial;
    this._strokeStyle = "Solid";
    this._materialAmbient = [0.2, 0.2, 0.2, 1.0];
    this._materialDiffuse = [0.4, 0.4, 0.4, 1.0];
    this._materialSpecular = [0.4, 0.4, 0.4, 1.0];
    this._fillColor = [0.4, 0.4, 0.4, 1.0];
    this._fillMaterial;
    this._DISPLAY_ANCHOR_RADIUS = 5;
    //drawing context
    this._world = null;

    //tool that owns this subpath
    this._drawingTool = null;
    this._planeMat = null;
    this._planeMatInv = null;
    this._planeCenter = null;

    // initialize the inherited members
    this.inheritedFrom = GLGeomObj;
    this.inheritedFrom();

    //used to query what the user selected, OR-able for future extensions
    this.SEL_NONE = 0;          //nothing was selected
    this.SEL_ANCHOR = 1;        //anchor point was selected
    this.SEL_PREV = 2;          //previous handle of anchor point was selected
    th