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-rwxr-xr-xjs/helper-classes/RDGE/GLBrushStroke.js135
1 files changed, 98 insertions, 37 deletions
diff --git a/js/helper-classes/RDGE/GLBrushStroke.js b/js/helper-classes/RDGE/GLBrushStroke.js
index c1469977..26c922a3 100755
--- a/js/helper-classes/RDGE/GLBrushStroke.js
+++ b/js/helper-classes/RDGE/GLBrushStroke.js
@@ -81,7 +81,7 @@ function GLBrushStroke() {
81 //add the point only if it is some epsilon away from the previous point 81 //add the point only if it is some epsilon away from the previous point
82 var numPoints = this._Points.length; 82 var numPoints = this._Points.length;
83 if (numPoints>0) { 83 if (numPoints>0) {
84 var threshold = this._WETNESS_FACTOR*this._strokeWidth; 84 var threshold = 1;//this._WETNESS_FACTOR*this._strokeWidth;
85 var prevPt = this._Points[numPoints-1]; 85 var prevPt = this._Points[numPoints-1];
86 var diffPt = [prevPt[0]-pt[0], prevPt[1]-pt[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]); 87 var diffPtMag = Math.sqrt(diffPt[0]*diffPt[0] + diffPt[1]*diffPt[1]);
@@ -375,46 +375,58 @@ function GLBrushStroke() {
375 */ 375 */
376 376
377 /* 377 /*
378 var R2 = this._strokeWidth; 378 //build the stamp for the brush stroke
379 var R = R2*0.5; 379 //todo get this directly from the UI
380 var hardness = 0; //for a pencil, this is always 1 //TODO get hardness parameter from user interface 380 var t=0;
381 var innerRadius = (hardness*R)-1;
382 if (innerRadius<1)
383 innerRadius=1;
384
385 var r = ctx.createRadialGradient(0,0,innerRadius, 0,0,R);
386 var midColor = "rgba("+parseInt(255*this._strokeColor[0])+","+parseInt(255*this._strokeColor[1])+","+parseInt(255*this._strokeColor[2])+",1)";
387 r.addColorStop(0, midColor);
388 var endColor = "rgba("+parseInt(255*this._strokeColor[0])+","+parseInt(255*this._strokeColor[1])+","+parseInt(255*this._strokeColor[2])+",0.0)";
389 r.addColorStop(1, endColor);
390 ctx.fillStyle = r;
391
392 for (var i = 0; i < numPoints; i++) {
393 var pt = this._Points[i];
394 ctx.globalCompositeOperation = 'source-over';
395 var x = pt[0]-bboxMin[0];
396 var y = pt[1]-bboxMin[1];
397 ctx.save();
398 ctx.translate(x,y);
399 ctx.arc(0, 0, R, 0, 2 * Math.PI, false);
400 ctx.fill();
401 ctx.restore();
402 //ctx.globalCompositeOperation = 'source-in';
403 //ctx.rect(x-R, y-R, R2, R2);
404 }
405 */
406
407 var numTraces = this._strokeWidth; 381 var numTraces = this._strokeWidth;
408 var halfNumTraces = numTraces/2; 382 var halfNumTraces = numTraces/2;
409 var deltaDisplacement = [1,0];//[this._strokeWidth/numTraces, 0]; //a horizontal line brush
410 var startPos = [-this._strokeWidth/2,0]; 383 var startPos = [-this._strokeWidth/2,0];
411 for (var t=0;t<numTraces;t++){ 384 var brushStamp = [];
412 var disp = [startPos[0]+t*deltaDisplacement[0], startPos[1]+t*deltaDisplacement[1]]; 385
386 //build an angled (calligraphic) brush stamp
387 var deltaDisplacement = [1,1];//[this._strokeWidth/numTraces, 0]; //a horizontal line brush
388 for (t=0;t<numTraces;t++){
389 var brushPt = [startPos[0]+t*deltaDisplacement[0], startPos[1]+t*deltaDisplacement[1]];
390 brushStamp.push(brushPt);
391 }
392
393
394 //make a circular brush stamp
395 brushStamp=[];
396 numTraces = this._strokeWidth*Math.PI; //figure out how to
397 var radius = this._strokeWidth/2;
398 for (t=0;t<numTraces;t++)
399 {
400 var angle = Math.PI*(360*t/numTraces)/180;
401 var brushPt = [radius*Math.cos(angle), radius*Math.sin(angle)];
402 brushStamp.push(brushPt);
403 }
404
405// //make a square brush stamp
406// STOPPED HERE
407// brushStamp = [];
408// numTraces = 4*strokeWidth;
409// for (t=0;t<numTraces;t++){
410// if (t<numTraces*0.25){
411// var brushPt = [startPos[0]+t*deltaDisplacement[0], startPos[1]+t*deltaDisplacement[1]];
412// } else if (t<numTraces*0.5){
413//
414// } else if (t<numTraces*0.75){
415//
416// } else {
417//
418// }
419// brushStamp.push(brushPt);
420// }
421
422 for (t=0;t<numTraces;t++){
423 var disp = [brushStamp[t][0], brushStamp[t][1]];
413 //ctx.globalCompositeOperation = 'source-over'; 424 //ctx.globalCompositeOperation = 'source-over';
414 var distFromMiddle = Math.abs(halfNumTraces-t); 425 var distFromMiddle = Math.abs(halfNumTraces-t);
415 var alphaVal = 1.0 - (100-this._strokeHardness)*(distFromMiddle/halfNumTraces)/100; 426 var alphaVal = 1.0 - (100-this._strokeHardness)*(distFromMiddle/halfNumTraces)/100;
427 alphaVal = 0.2;
416 ctx.save(); 428 ctx.save();
417 ctx.lineWidth=this._strokeWidth/10;//4; 429 ctx.lineWidth=this._strokeWidth/10;//todo figure out the correct formula for the line width
418 if (ctx.lineWidth<2) 430 if (ctx.lineWidth<2)
419 ctx.lineWidth=2; 431 ctx.lineWidth=2;
420 if (t===numTraces-1){ 432 if (t===numTraces-1){
@@ -422,10 +434,10 @@ function GLBrushStroke() {
422 } 434 }
423 ctx.lineJoin="bevel"; 435 ctx.lineJoin="bevel";
424 ctx.lineCap="butt"; 436 ctx.lineCap="butt";
425 if (t<numTraces/2) 437 //if (t<numTraces/2)
426 ctx.strokeStyle="rgba("+parseInt(255*this._strokeColor[0])+","+parseInt(255*this._strokeColor[1])+","+parseInt(255*this._strokeColor[2])+","+alphaVal+")"; 438 ctx.strokeStyle="rgba("+parseInt(255*this._strokeColor[0])+","+parseInt(255*this._strokeColor[1])+","+parseInt(255*this._strokeColor[2])+","+alphaVal+")";
427 else 439 //else
428 ctx.strokeStyle="rgba("+parseInt(255*this._secondStrokeColor[0])+","+parseInt(255*this._secondStrokeColor[1])+","+parseInt(255*this._secondStrokeColor[2])+","+alphaVal+")"; 440 // 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]); 441 ctx.translate(disp[0],disp[1]);
430 ctx.beginPath(); 442 ctx.beginPath();
431 ctx.moveTo(this._Points[0][0]-bboxMin[0], this._Points[0][1]-bboxMin[1]); 443 ctx.moveTo(this._Points[0][0]-bboxMin[0], this._Points[0][1]-bboxMin[1]);
@@ -435,8 +447,10 @@ function GLBrushStroke() {
435 ctx.stroke(); 447 ctx.stroke();
436 ctx.restore(); 448 ctx.restore();
437 } 449 }
450 */
438 451
439 /* 452 /*
453 //debugging path
440 ctx.beginPath(); 454 ctx.beginPath();
441 ctx.moveTo(this._Points[0][0]-bboxMin[0], this._Points[0][1]-bboxMin[1]); 455 ctx.moveTo(this._Points[0][0]-bboxMin[0], this._Points[0][1]-bboxMin[1]);
442 for (var i=1;i<numPoints;i++){ 456 for (var i=1;i<numPoints;i++){
@@ -447,6 +461,53 @@ function GLBrushStroke() {
447 ctx.stroke(); 461 ctx.stroke();
448 */ 462 */
449 463
464 var numlayers = this._strokeWidth/2;
465 var alphaVal = 1.0/(numlayers-1);
466 for (var l=0;l<numlayers;l++){
467 ctx.beginPath();
468 ctx.moveTo(this._Points[0][0]-bboxMin[0], this._Points[0][1]-bboxMin[1]);
469 for (var i=1;i<numPoints;i++){
470 ctx.lineTo(this._Points[i][0]-bboxMin[0], this._Points[i][1]-bboxMin[1]);
471 }
472 ctx.lineCap = "round";
473 ctx.lineJoin="round";
474 ctx.lineWidth=l+1;
475 ctx.strokeStyle="rgba("+parseInt(255*this._strokeColor[0])+","+parseInt(255*this._strokeColor[1])+","+parseInt(255*this._strokeColor[2])+","+alphaVal+")";
476 ctx.stroke();
477 }
478
479 /*
480 var R2 = this._strokeWidth;
481 var R = R2*0.5;
482 var hardness = 0; //for a pencil, this is always 1 //TODO get hardness parameter from user interface
483 var innerRadius = (hardness*R)-1;
484 if (innerRadius<1)
485 innerRadius=1;
486
487 var r = ctx.createRadialGradient(0,0,innerRadius, 0,0,R);
488 var midColor = "rgba("+parseInt(255*this._strokeColor[0])+","+parseInt(255*this._strokeColor[1])+","+parseInt(255*this._strokeColor[2])+",1)";
489 r.addColorStop(0, midColor);
490 var endColor = "rgba("+parseInt(255*this._strokeColor[0])+","+parseInt(255*this._strokeColor[1])+","+parseInt(255*this._strokeColor[2])+",0.0)";
491 r.addColorStop(1, endColor);
492 ctx.fillStyle = r;
493
494 for (var i = 0; i < numPoints; i++) {
495 var pt = this._Points[i];
496 ctx.globalCompositeOperation = 'source-over';
497 var x = pt[0]-bboxMin[0];
498 var y = pt[1]-bboxMin[1];
499 ctx.save();
500 ctx.translate(x,y);
501 ctx.arc(0, 0, R, 0, 2 * Math.PI, false);
502 ctx.fill();
503 ctx.restore();
504 break;
505 //ctx.globalCompositeOperation = 'source-in';
506 //ctx.rect(x-R, y-R, R2, R2);
507 }
508 */
509
510
450 ctx.restore(); 511 ctx.restore();
451 } //render() 512 } //render()
452 513