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-rwxr-xr-xjs/helper-classes/RDGE/GLBrushStroke.js113
-rwxr-xr-xjs/helper-classes/RDGE/GLSubpath.js147
2 files changed, 232 insertions, 28 deletions
diff --git a/js/helper-classes/RDGE/GLBrushStroke.js b/js/helper-classes/RDGE/GLBrushStroke.js
index 5d773c2d..c1469977 100755
--- a/js/helper-classes/RDGE/GLBrushStroke.js
+++ b/js/helper-classes/RDGE/GLBrushStroke.js
@@ -31,6 +31,8 @@ function GLBrushStroke() {
31 //stroke information 31 //stroke information
32 this._strokeWidth = 0.0; 32 this._strokeWidth = 0.0;
33 this._strokeColor = [0.4, 0.4, 0.4, 1.0]; 33 this._strokeColor = [0.4, 0.4, 0.4, 1.0];
34 this._secondStrokeColor = this._strokeColor;
35 this._strokeHardness = 100;
34 this._strokeMaterial; 36 this._strokeMaterial;
35 this._strokeStyle = "Solid"; 37 this._strokeStyle = "Solid";
36 38
@@ -39,7 +41,7 @@ function GLBrushStroke() {
39 this._WETNESS_FACTOR = 0.25; 41 this._WETNESS_FACTOR = 0.25;
40 42
41 //prevent extremely long paths that can take a long time to render 43 //prevent extremely long paths that can take a long time to render
42 this._MAX_ALLOWED_SAMPLES = 500; 44 this._MAX_ALLOWED_SAMPLES = 5000;
43 45
44 //drawing context 46 //drawing context
45 this._world = null; 47 this._world = null;
@@ -106,6 +108,8 @@ function GLBrushStroke() {
106 this.setStrokeMaterial = function (m) { this._strokeMaterial = m; } 108 this.setStrokeMaterial = function (m) { this._strokeMaterial = m; }
107 this.getStrokeColor = function () { return this._strokeColor; } 109 this.getStrokeColor = function () { return this._strokeColor; }
108 this.setStrokeColor = function (c) { this._strokeColor = c; } 110 this.setStrokeColor = function (c) { this._strokeColor = c; }
111 this.setSecondStrokeColor = function(c){this._secondStrokeColor=c;}
112 this.setStrokeHardness = function(h){this._strokeHardness=h;}
109 this.getStrokeStyle = function () { return this._strokeStyle; } 113 this.getStrokeStyle = function () { return this._strokeStyle; }
110 this.setStrokeStyle = function (s) { this._strokeStyle = s; } 114 this.setStrokeStyle = function (s) { this._strokeStyle = s; }
111 115
@@ -133,13 +137,14 @@ function GLBrushStroke() {
133 this._Points[i][2]+=tz; 137 this._Points[i][2]+=tz;
134 } 138 }
135 } 139 }
136 140
137 this.computeMetaGeometry = function(){ 141 this.computeMetaGeometry = function(){
138 if (this._dirty){ 142 if (this._dirty){
139 var numPoints = this._Points.length; 143 var numPoints = this._Points.length;
140 144
141 //**** add samples to the path if needed...linear interpolation for now 145 //**** add samples to the path if needed...linear interpolation for now
142 if (numPoints>1) { 146 //if (numPoints>1) {
147 if (0){
143 var threshold = this._WETNESS_FACTOR*this._strokeWidth; 148 var threshold = this._WETNESS_FACTOR*this._strokeWidth;
144 var prevPt = this._Points[0]; 149 var prevPt = this._Points[0];
145 var prevIndex = 0; 150 var prevIndex = 0;
@@ -171,6 +176,44 @@ function GLBrushStroke() {
171 } 176 }
172 } 177 }
173 178
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 }
174 // *** compute the bounding box ********* 217 // *** compute the bounding box *********
175 this._BBoxMin = [Infinity, Infinity, Infinity]; 218 this._BBoxMin = [Infinity, Infinity, Infinity];
176 this._BBoxMax = [-Infinity, -Infinity, -Infinity]; 219 this._BBoxMax = [-Infinity, -Infinity, -Infinity];
@@ -331,7 +374,7 @@ function GLBrushStroke() {
331 } 374 }
332 */ 375 */
333 376
334 377 /*
335 var R2 = this._strokeWidth; 378 var R2 = this._strokeWidth;
336 var R = R2*0.5; 379 var R = R2*0.5;
337 var hardness = 0; //for a pencil, this is always 1 //TODO get hardness parameter from user interface 380 var hardness = 0; //for a pencil, this is always 1 //TODO get hardness parameter from user interface
@@ -359,6 +402,50 @@ function GLBrushStroke() {
359 //ctx.globalCompositeOperation = 'source-in'; 402 //ctx.globalCompositeOperation = 'source-in';
360 //ctx.rect(x-R, y-R, R2, R2); 403 //ctx.rect(x-R, y-R, R2, R2);
361 } 404 }
405 */
406
407 var numTraces = this._strokeWidth;
408 var halfNumTraces = numTraces/2;
409 var deltaDisplacement = [1,0];//[this._strokeWidth/numTraces, 0]; //a horizontal line brush
410 var startPos = [-this._strokeWidth/2,0];
411 for (var t=0;t<numTraces;t++){
412 var disp = [startPos[0]+t*deltaDisplacement[0], startPos[1]+t*deltaDisplacement[1]];
413 //ctx.globalCompositeOperation = 'source-over';
414 var distFromMiddle = Math.abs(halfNumTraces-t);
415 var alphaVal = 1.0 - (100-this._strokeHardness)*(distFromMiddle/halfNumTraces)/100;
416 ctx.save();
417 ctx.lineWidth=this._strokeWidth/10;//4;
418 if (ctx.lineWidth<2)
419 ctx.lineWidth=2;
420 if (t===numTraces-1){
421 ctx.lineWidth = 1;
422 }
423 ctx.lineJoin="bevel";
424 ctx.lineCap="butt";
425 if (t<numTraces/2)
426 ctx.strokeStyle="rgba("+parseInt(255*this._strokeColor[0])+","+parseInt(255*this._strokeColor[1])+","+parseInt(255*this._strokeColor[2])+","+alphaVal+")";
427 else
428 ctx.strokeStyle="rgba("+parseInt(255*this._secondStrokeColor[0])+","+parseInt(255*this._secondStrokeColor[1])+","+parseInt(255*this._secondStrokeColor[2])+","+alphaVal+")";
429 ctx.translate(disp[0],disp[1]);
430 ctx.beginPath();
431 ctx.moveTo(this._Points[0][0]-bboxMin[0], this._Points[0][1]-bboxMin[1]);
432 for (var i=0;i<numPoints;i++){
433 ctx.lineTo(this._Points[i][0]-bboxMin[0], this._Points[i][1]-bboxMin[1]);
434 }
435 ctx.stroke();
436 ctx.restore();
437 }
438
439 /*
440 ctx.beginPath();
441 ctx.moveTo(this._Points[0][0]-bboxMin[0], this._Points[0][1]-bboxMin[1]);
442 for (var i=1;i<numPoints;i++){
443 ctx.lineTo(this._Points[i][0]-bboxMin[0], this._Points[i][1]-bboxMin[1]);
444 }
445 ctx.lineWidth=1.0;
446 ctx.strokeStyle = "black";
447 ctx.stroke();
448 */
362 449
363 ctx.restore(); 450 ctx.restore();
364 } //render() 451 } //render()
@@ -394,4 +481,20 @@ function GLBrushStroke() {
394 return true; 481 return true;
395 } 482 }
396 483
397} //function GLSubpath ...class definition \ No newline at end of file 484} //function GLBrushStroke ...class definition
485
486GLBrushStroke.prototype._CatmullRomSplineInterpolate = function(ctrlPts, t)
487{
488 //perform CatmullRom interpolation on the spline...assume t is in [0,1]
489 var t2 = t*t;
490 var t3 = t2*t;
491 var retPoint = [0,0,0];
492 for (var i=0;i<3;i++){
493 retPoint[i] = 0.5 *(
494 (2*ctrlPts[1][i]) +
495 (-ctrlPts[0][i] + ctrlPts[2][i]) * t +
496 (2*ctrlPts[0][i] - 5*ctrlPts[1][i] + 4*ctrlPts[2][i] - ctrlPts[3][i]) * t2 +
497 (-ctrlPts[0][i] + 3*ctrlPts[1][i]- 3*ctrlPts[2][i] + ctrlPts[3][i]) * t3);
498 }
499 return retPoint;
500} \ No newline at end of file
diff --git a/js/helper-classes/RDGE/GLSubpath.js b/js/helper-classes/RDGE/GLSubpath.js
index f3d8ad36..2fb91d33 100755
--- a/js/helper-classes/RDGE/GLSubpath.js
+++ b/js/helper-classes/RDGE/GLSubpath.js
@@ -505,7 +505,6 @@ GLSubpath.prototype._isWithinBoundingBox = function(point, ctrlPts, radius) {
505GLSubpath.prototype.pickAnchor = function (pickX, pickY, pickZ, radius) { 505GLSubpath.prototype.pickAnchor = function (pickX, pickY, pickZ, radius) {
506 var numAnchors = this._Anchors.length; 506 var numAnchors = this._Anchors.length;
507 var selAnchorIndex = -1; 507 var selAnchorIndex = -1;
508 var retCode = this.SEL_NONE;
509 var radSq = radius * radius; 508 var radSq = radius * radius;
510 var minDistance = Infinity; 509 var minDistance = Infinity;
511 //check if the clicked location is close to the currently selected anchor position 510 //check if the clicked location is close to the currently selected anchor position
@@ -515,9 +514,23 @@ GLSubpath.prototype.pickAnchor = function (pickX, pickY, pickZ, radius) {
515 if (distSq < minDistance && distSq < radSq) { 514 if (distSq < minDistance && distSq < radSq) {
516 selAnchorIndex = this._selectedAnchorIndex; 515 selAnchorIndex = this._selectedAnchorIndex;
517 minDistance = distSq; 516 minDistance = distSq;
518 retCode = retCode | this.SEL_ANCHOR; 517 } else {
518 //check the prev and next of the selected anchor if the above did not register a hit
519 distSq = this._Anchors[this._selectedAnchorIndex].getPrevDistanceSq(pickX, pickY, pickZ);
520 if (distSq < minDistance && distSq < radSq){
521 selAnchorIndex = this._selectedAnchorIndex;
522 minDistance = distSq;
523 } else {
524 //check the next for this anchor point
525 distSq = this._Anchors[this._selectedAnchorIndex].getNextDistanceSq(pickX, pickY, pickZ);