path: root/js/lib/geom/sub-path.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> */


var VecUtils =      require("js/helper-classes/3D/vec-utils").VecUtils;
var CanvasController = require("js/controllers/elements/canvas-controller").CanvasController;
var GeomObj =       require("js/lib/geom/geom-obj").GeomObj;
var AnchorPoint =   require("js/lib/geom/anchor-point").AnchorPoint;
var MaterialsModel = require("js/models/materials-model").MaterialsModel;

// TODO Those function do not seems to be used. We should remove them
/*
function SubpathOffsetPoint(pos, mapPos) {
    this.Pos = [pos[0],pos[1],pos[2]];
    this.CurveMapPos = [mapPos[0], mapPos[1], mapPos[2]];
}

function SubpathOffsetTriangle(v0, v1, v2) {
    this.v0 = v0;
    this.v1 = v1;
    this.v2 = v2;
    this.n = [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 GeomObj
///////////////////////////////////////////////////////////////////////

var GLSubpath = 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 in stage world space
    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._LocalPoints = [];             //polyline representation of this curve in canvas space
    this._LocalBBoxMin = [0,0,0];       //bbox min point of _LocalPoints
    this._LocalBBoxMax = [0,0,0];       //bbox max point of _LocalPoints

    this._UnprojectedAnchors = [];

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

    //initially set the local dirty bit so we will construct local coordinates
    this._isLocalDirty = true;

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

    //the canvas that will draw this subpath
    this._canvas = null;
    
    //the top left location of this subpath's canvas in screen space
    this._canvasLeft = 0;
    this._canvasTop = 0;

    //stroke information
    this._strokeWidth = 1.0;
    this._strokeColor = [0.4, 0.4, 0.4, 1.0];
    this._strokeMaterial = null
    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 = [1.0, 1.0, 1.0, 0.0];
    this._fillMaterial = null;
    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;
    this._dragPlane = null;

    //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
    this.SEL_NEXT = 4;          //next handle of anchor point was selected
    this.SEL_PATH = 8;          //the path itself was selected
    this._selectMode = this.SEL_NONE;
    this._selectedAnchorIndex = -1;

    this._SAMPLING_EPSILON = 0.5; //epsilon used for sampling the curve
    this._DEFAULT_STROKE_WIDTH = 20; //use only if stroke width not specified
    this._MAX_OFFSET_ANGLE = 10; //max angle (in degrees) between consecutive vectors