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1/* <copyright>
2This file contains proprietary software owned by Motorola Mobility, Inc.<br/>
3No rights, expressed or implied, whatsoever to this software are provided by Motorola Mobility, Inc. hereunder.<br/>
4(c) Copyright 2011 Motorola Mobility, Inc. All Rights Reserved.
5</copyright> */
6
7// Todo: This entire class should be converted to a module
8var VecUtils = require("js/helper-classes/3D/vec-utils").VecUtils;
9
10///////////////////////////////////////////////////////////////////////
11// Class GLBrushStroke
12// representation a sequence points (polyline) created by brush tool.
13// Derived from class GLGeomObj
14///////////////////////////////////////////////////////////////////////
15function GLBrushStroke() {
16 ///////////////////////////////////////////////////
17 // Instance variables
18 ///////////////////////////////////////////////////
19 this._Points = [];
20 this._BBoxMin = [0, 0, 0];
21 this._BBoxMax = [0, 0, 0];
22 this._dirty = true;
23
24 //whether or not to use the canvas drawing to stroke/fill
25 this._useCanvasDrawing = true;
26
27 //the X and Y location of this subpath's canvas in stage world space of Ninja
28 this._canvasX = 0;
29 this._canvasY = 0;
30
31 //stroke information
32 this._strokeWidth = 0.0;
33 this._strokeColor = [0.4, 0.4, 0.4, 1.0];
34 this._secondStrokeColor = this._strokeColor;
35 this._strokeHardness = 100;
36 this._strokeMaterial;
37 this._strokeStyle = "Solid";
38
39 //the wetness of the brush (currently this is multiplied to the square of the stroke width, but todo should be changed to not depend on stroke width entirely
40 //smaller value means more samples for the path
41 this._WETNESS_FACTOR = 0.25;
42
43 //prevent extremely long paths that can take a long time to render
44 this._MAX_ALLOWED_SAMPLES = 5000;
45
46 //drawing context
47 this._world = null;
48
49 //tool that owns this brushstroke
50 this._drawingTool = null;
51 this._planeMat = null;
52 this._planeMatInv = null;
53 this._planeCenter = null;
54
55 // initialize the inherited members
56 this.inheritedFrom = GLGeomObj;
57 this.inheritedFrom();
58
59 /////////////////////////////////////////////////////////
60 // Property Accessors/Setters
61 /////////////////////////////////////////////////////////
62 this.setWorld = function (world) { this._world = world; }
63 this.getWorld = function () { return this._world; }
64 this.geomType = function () { return this.GEOM_TYPE_CUBIC_BEZIER; }
65 this.setDrawingTool = function (tool) {this._drawingTool = tool;}
66 this.getDrawingTool = function () {return this._drawingTool;}
67 this.setPlaneMatrix = function(planeMat){this._planeMat = planeMat;}
68 this.setPlaneMatrixInverse = function(planeMatInv){this._planeMatInv = planeMatInv;}
69 this.setPlaneCenter = function(pc){this._planeCenter = pc;}
70
71 this.getCanvasX = function(){return this._canvasX;}
72 this.getCanvasY = function(){return this._canvasY;}
73 this.setCanvasX = function(cx){this._canvasX=cx;}
74 this.setCanvasY = function(cy){this._canvasY=cy;}
75
76
77 this.getNumPoints = function () { return this._Points.length; }
78 this.getPoint = function (index) { return this._Points[index]; }
79 this.addPoint = function (pt)
80 {
81 //add the point only if it is some epsilon away from the previous point
82 var numPoints = this._Points.length;
83 if (numPoints>0) {
84 var threshold = 1;//this._WETNESS_FACTOR*this._strokeWidth;
85 var prevPt = this._Points[numPoints-1];
86 var diffPt = [prevPt[0]-pt[0], prevPt[1]-pt[1]];
87 var diffPtMag = Math.sqrt(diffPt[0]*diffPt[0] + diffPt[1]*diffPt[1]);
88 if (diffPtMag>threshold){
89 this._Points.push(pt);
90 this._dirty=true;
91 }
92 }else{
93 this._Points.push(pt);
94 this._dirty=true;
95 }
96 }
97
98 this.insertPoint = function(pt, index){ this._Points.splice(index, 0, pt); this._dirty=true;}
99 this.isDirty = function(){return this._dirty;}
100 this.makeDirty = function(){this._dirty=true;}
101
102 this.getBBoxMin = function () { return this._BBoxMin; }
103 this.getBBoxMax = function () { return this._BBoxMax; }
104
105 this.getStrokeWidth = function () { return this._strokeWidth; }
106 this.setStrokeWidth = function (w) { this._strokeWidth = w; this._dirty=true;}
107 this.getStrokeMaterial = function () { return this._strokeMaterial; }
108 this.setStrokeMaterial = function (m) { this._strokeMaterial = m; }
109 this.getStrokeColor = function () { return this._strokeColor; }
110 this.setStrokeColor = function (c) { this._strokeColor = c; }
111 this.setSecondStrokeColor = function(c){this._secondStrokeColor=c;}
112 this.setStrokeHardness = function(h){this._strokeHardness=h;}
113 this.getStrokeStyle = function () { return this._strokeStyle; }
114 this.setStrokeStyle = function (s) { this._strokeStyle = s; }
115
116 this.setWidth = function () { }//NO-OP for now
117 this.setHeight = function () {}//NO-OP for now
118
119
120 //remove and return anchor at specified index, return null on error
121 this.removePoint = function (index) {
122 var retAnchor = null;
123 if (index < this._Points.length) {
124 retPt = this._Points.splice(index, 1);
125 this._dirty=true;
126 }
127 return retPoint;
128 }
129
130 //remove all the points
131 this.clear = function () { this._Points = []; this._dirty=true;}
132
133 this.translate = function (tx, ty, tz) {
134 for (var i=0;i<this._Points.length;i++){
135 this._Points[i][0]+=tx;
136 this._Points[i][1]+=ty;
137 this._Points[i][2]+=tz;
138 }
139 }
140
141 this.computeMetaGeometry = function(){
142 if (this._dirty){
143 var numPoints = this._Points.length;
144
145 //**** add samples to the path if needed...linear interpolation for now
146 //if (numPoints>1) {
147 if (0){
148 var threshold = this._WETNESS_FACTOR*this._strokeWidth;
149 var prevPt = this._Points[0];
150 var prevIndex = 0;
151 for (var i=1;i<numPoints;i++){
152 var pt = this._Points[i];
153 var diff = [pt[0]-prevPt[0], pt[1]-prevPt[1]];
154 var distance = Math.sqrt(diff[0]*diff[0]+diff[1]*diff[1]);
155 if (distance>threshold){
156 //insert points along the prev. to current point
157 var numNewPoints = Math.floor(distance/threshold);
158 for (var j=0;j<numNewPoints;j++){
159 var param = (j+1)/(numNewPoints+1);
160 var newpt = [prevPt[0]+ diff[0]*param, prevPt[1]+ diff[1]*param];
161 //insert new point before point i
162 this._Points.splice(i, 0, [newpt[0], newpt[1], 0]);
163 i++;
164 }
165 this._dirty=true;
166 }
167 prevPt=pt;
168 //update numPoints to match the new length
169 numPoints = this._Points.length;
170
171 //end this function if the numPoints has gone above the max. size specified
172 if (numPoints> this._MAX_ALLOWED_SAMPLES){
173 console.log("leaving the resampling because numPoints is greater than limit:"+this._MAX_ALLOWED_SAMPLES);
174 break;
175 }
176 }
177 }
178
179 //**** add samples to the long sections of the path --- Catmull-Rom spline interpolation
180 if (numPoints>1) {
181 var numInsertedPoints = 0;
182 var threshold = 5;//0.25*this._strokeWidth; //this determines whether a segment between two sample is too long
183 var prevPt = this._Points[0];
184 for (var i=1;i<numPoints;i++){
185 var pt = this._Points[i];
186 var diff = [pt[0]-prevPt[0], pt[1]-prevPt[1]];
187 var distance = Math.sqrt(diff[0]*diff[0]+diff[1]*diff[1]);
188 if (distance>threshold){
189 //build the control polygon for the Catmull-Rom spline (prev. 2 points and next 2 points)
190 var prev = (i===1) ? i-1 : i-2;
191 var next = (i===numPoints-1) ? i : i+1;
192 var ctrlPts = [this._Points[prev], this._Points[i-1], this._Points[i], this._Points[next]];
193 //insert points along the prev. to current point
194 var numNewPoints = Math.floor(distance/threshold);
195 for (var j=0;j<numNewPoints;j++){
196 var param = (j+1)/(numNewPoints+1);
197 var newpt = this._CatmullRomSplineInterpolate(ctrlPts, param);
198 //insert new point before point i
199 this._Points.splice(i, 0, newpt);
200 i++;
201 numInsertedPoints++;
202 }
203 this._dirty=true;
204 }
205 prevPt=pt;
206 //update numPoints to match the new length
207 numPoints = this._Points.length;
208
209 //end this function if the numPoints has gone above the max. size specified
210 if (numPoints> this._MAX_ALLOWED_SAMPLES){
211 console.log("leaving the resampling because numPoints is greater than limit:"+this._MAX_ALLOWED_SAMPLES);
212 break;
213 }
214 }
215 console.log("Inserted "+numInsertedPoints+" additional CatmullRom points");
216 }