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Bahtinov.html
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Bahtinov.html
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<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>Bahtinov Mask Drawings generator webApps</title>
</head>
<script>
/**
Bahtinov Mask Drawings generator webApps
Copyright (C) 2020 Satoru Takagi
bsed on Tri-Bahtinov Mask generator webApps
This software is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
generate.py is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with derot. If not, see <http://www.gnu.org/licenses/>.
**/
/**
Revision history:
12/15/2020 1st rev
01/18/2021 rounding edge option
08/28/2021 hairline option
**/
/**
To Do:
Rounding edges : see also https://stackoverflow.com/questions/24771828/algorithm-for-creating-rounded-corners-in-a-polygon
**/
var svgNs = "http://www.w3.org/2000/svg";
var INCH2PIXELS = 72; //convert 1 inch to pixels
var BAHTINOV_FACTOR = 150; // will be changed by select
var PAPER_MAX_X = 11*INCH2PIXELS;
var PAPER_MAX_Y = 11*INCH2PIXELS;
// Tri-Bahtinov parameters that generates my 8" mask
var focal_length;
var tri_outb_r = 4.4375*INCH2PIXELS; // inches, outer boundary radius
var tri_inb_r = 1.4375*INCH2PIXELS; // inches, inner boundary radius
var tri_out_r = 4.00*INCH2PIXELS; // inches, tribahtinov mask outer radius
var tri_in_r = 1.6737*INCH2PIXELS; // inches, tribahtinov mask inner radius
var tri_w = 0.3071*INCH2PIXELS; // inches, width of each slit -> Equivalent to F.L. 1170.051mm B.F. 150
// constants that the user does not change
var tri_stem_w = 0.2362*INCH2PIXELS; // inches, width of each supporting stem
var tri_stem_w0 = tri_stem_w;
var tri_out_w = 0.4375*INCH2PIXELS; // inches, width of the outer support
var tri_in_w = 0.2362*INCH2PIXELS; // inches, width of the inner support
var tri_mount_hole_r = 0.075*INCH2PIXELS; // mounting hole size
var tri_angle = 20*Math.PI/180; // radians
var upDownBoundaryStemRatio = 0.66; // The ratio of advance to the up side when creating a boundary stem. Since the lower side of the boundary sem works somewhat as upper slit, it is set larger than half.
var equalizeArea = true;
var roundEdge = false;
var svg;
function initParams(focal_length_mm, tri_outb_r_mm, tri_inb_r_mm , tri_out_w_mm , tri_in_w_mm ){
focal_length = focal_length_mm/toMm*INCH2PIXELS;
// tri_w = orderFactor * focal_length/BAHTINOV_FACTOR;
var tri_w_stem_w = orderFactor * focal_length/BAHTINOV_FACTOR;
tri_outb_r = tri_outb_r_mm/toMm*INCH2PIXELS;
tri_inb_r = tri_inb_r_mm/toMm*INCH2PIXELS;
if ( tri_out_w_mm && tri_in_w_mm ){
tri_out_w = tri_out_w_mm/toMm*INCH2PIXELS;
tri_in_w = tri_in_w_mm/toMm*INCH2PIXELS;
}
console.log("tri_out_w:",tri_out_w," tri_in_w:",tri_in_w);
tri_out_r = tri_outb_r - tri_out_w;
if ( stemWratio >= 0 ){ // Hmmm. global var...
// tri_stem_w = tri_w / stemWratio;
// tri_w_stem_w = tri_stem_w * ( 1 + stemWratio );
tri_stem_w = tri_w_stem_w / ( 1 + stemWratio );
tri_w = tri_stem_w * stemWratio
} else {
if ( tri_w_stem_w - tri_stem_w0 > tri_stem_w0 * 0.5 ){
tri_stem_w = tri_stem_w0;
tri_w = tri_w_stem_w - tri_stem_w;
} else {
tri_stem_w = 2 * tri_w_stem_w / 3;
tri_w = tri_w_stem_w / 3;
// console.log( "over limit...:",tri_stem_w,tri_w);
}
}
// console.log("tri_w_stem_w:",tri_w_stem_w," tri_w:",tri_w," tri_stem_w:",tri_stem_w," orderFactor:",orderFactor," focal_length:",focal_length," BAHTINOV_FACTOR:",BAHTINOV_FACTOR);
tri_in_r = tri_inb_r + tri_in_w;
// tri_in_r = tri_inb_r + tri_stem_w;
}
function initParamsInch(focal_length_mm, tri_outb_r, tri_inb_r){
initParams(focal_length_mm, tri_outb_r*toMm, tri_inb_r*toMm);
}
onload=function(){
tb1 = document.getElementById("textBox1");
tb2 = document.getElementById("textBox2");
tb3 = document.getElementById("textBox3");
outW = document.getElementById("outW");
inW = document.getElementById("inW");
// initParamsInch(1170.051,4.4375,1.4375);
// buildMask();
changeUnit();
updateMask();
}
function buildMask(){
svg=document.getElementById("tb");
var canvasWH = Math.floor(tri_outb_r*1.1)*2;
svg.setAttribute("viewBox", (-canvasWH/2)+","+(-canvasWH/2)+","+canvasWH+","+canvasWH);
while (svg.firstChild) svg.removeChild(svg.firstChild);
// console.log("onload:",document.getElementById("tb"));
cr = svgContext(svg);
draw_slots_left(cr,0);
draw_slots_right_up(cr,0);
draw_slots_right_down(cr,0);
if ( buildMountHoles ){
draw_mounting_holes(cr,0);
}
/**
var gr=2*Math.PI/3;
draw_slots_left(cr,gr);
draw_slots_right_up(cr,gr);
draw_slots_right_down(cr,gr);
if ( buildMountHoles ){
draw_mounting_holes(cr,gr);
}
gr=-2*Math.PI/3;
draw_slots_left(cr,gr);
draw_slots_right_up(cr,gr);
draw_slots_right_down(cr,gr);
if ( buildMountHoles ){
draw_mounting_holes(cr,gr);
}
**/
cr.clearClipPath();
cr.push_group();
cr.setGlobalRotation(0);
cr.arc(0,0, tri_outb_r, 0,2*Math.PI);
cr.stroke();
cr.arc(0,0, tri_inb_r, 0,2*Math.PI);
cr.stroke();
cr.pop_group_to_source();
document.getElementById("svgSrc").value=serializeToString(svg);
}
/**
########################################################
# draw_slots_left( - draws the slots on the left
# cr - to this context
# )
########################################################
**/
function draw_slots_left(cr,grot){
var tri_mid_r = tri_out_r-roundEdge*tri_w/2 ;
cr.clearClipPath();
cr.push_group();
cr.setGlobalRotation(grot);
// make the mask
cr.set_operator(cr.OPERATOR_DEST_IN);
cr.set_source_rgba(0,0,0,1);
theta0 = Math.PI+(Math.atan2((roundEdge*tri_w+tri_stem_w)/2.0, tri_mid_r) - Math.PI/2.0);
theta1 = Math.PI+(-Math.atan2((roundEdge*tri_w+tri_stem_w)/2.0, tri_mid_r) + Math.PI/2.0);
cr.arc(0,0, tri_mid_r, theta0, theta1);
theta0 = -Math.PI+(-Math.atan2((roundEdge*tri_w+tri_stem_w)/2.0, tri_in_r) + Math.PI/2.0);
theta1 = -Math.PI+(Math.atan2((roundEdge*tri_w+tri_stem_w)/2.0, tri_in_r) - Math.PI/2.0);
if ( tri_in_r > tri_in_w){
cr.arc_negative(0,0, tri_in_r+ roundEdge*tri_w/2, theta0, theta1);
}
cr.setClipPath();
// cr.fill();
// cr.clearPath();
// start drawing the slots
spacing = (tri_stem_w + tri_w);
// y = -tri_out_r;
y = -tri_w/2 - spacing * (Math.floor(tri_out_r/spacing)+1);
while (y < tri_out_r ){
if ( roundEdge ){
cr.roundedHorizontalRect(tri_outb_r,-y -tri_w/2, -2*tri_outb_r , tri_w);
} else {
cr.rectangle(tri_outb_r, -y, -2*tri_outb_r, -tri_w);
}
y += spacing;
}
cr.stroke();
cr.pop_group_to_source();
cr.paint();
return(cr);
}
/**
########################################################
# draw_slots_right_up( - draws the slots on the upper right
# cr - to this context
# )
########################################################
**/
function draw_slots_right_up(cr,grot){
var tri_mid_r = tri_in_r+roundEdge*tri_w/2;
cr.clearClipPath();
cr.push_group();
cr.setGlobalRotation(grot);
// make the mask
theta0 = Math.atan2((roundEdge*tri_w+tri_stem_w)/2.0, tri_out_r) - Math.PI/2.0;
theta1 = -(Math.atan2((roundEdge*tri_w+tri_stem_w)/2.0, tri_out_r) );
cr.arc(0,0, tri_out_r-roundEdge*tri_w/2, theta0, theta1);
theta0 = -(Math.atan2((roundEdge*tri_w+tri_stem_w)/2.0, tri_mid_r) );
theta1 = -(-Math.atan2((roundEdge*tri_w+tri_stem_w)/2.0, tri_mid_r) ) - Math.PI/2.0;
if ( tri_in_r > tri_in_w){
cr.arc_negative(0,0, tri_mid_r, theta0, theta1);
} else {
cr.line_to((roundEdge*tri_w+tri_stem_w)/2,-(roundEdge*tri_w+tri_stem_w)/2);
}
// cr.fill();
cr.setClipPath();
cr.clearPath();
// start drawing the slots at 10 deg
cr.setRotate(-tri_angle); //TBD
spacing = (tri_stem_w + tri_w);
y = tri_out_r;
while (y > - tri_out_r){
if ( roundEdge ){
cr.roundedHorizontalRect(-1*INCH2PIXELS+16*INCH2PIXELS,-y-tri_stem_w -tri_w/2, -16*INCH2PIXELS , tri_w);
} else {
cr.rectangle(-1*INCH2PIXELS+16*INCH2PIXELS, -y-tri_stem_w, -16*INCH2PIXELS, -tri_w);
}
y -= spacing;
}
// draw only the 3 sides of the rectangle and leave the bottom undrawn
// find the position of this last slot
cr.stroke();
cr.clearRotate();
cr.pop_group_to_source();
cr.paint();
return(cr);
}
/**
########################################################
# draw_slots_right_down( - draws the slots on the lower right
# cr - to this context
# )
########################################################
**/
function draw_slots_right_down(cr,grot){
var tri_mid_r = tri_in_r+roundEdge*tri_w/2;
cr.clearClipPath();
cr.push_group();
cr.setGlobalRotation(grot);
// make the mask
theta0 = Math.atan2((roundEdge*tri_w+tri_stem_w)/2.0, tri_out_r) ;
theta1 = -(Math.atan2((roundEdge*tri_w+tri_stem_w)/2.0, tri_out_r) - Math.PI/2.0);
cr.arc(0,0, tri_out_r-roundEdge*tri_w/2, theta0, theta1);
theta0 = -(Math.atan2((roundEdge*tri_w+tri_stem_w)/2.0, tri_mid_r) - Math.PI/2.0);
theta1 = -(-Math.atan2((roundEdge*tri_w+tri_stem_w)/2.0, tri_mid_r) );
if ( tri_in_r > tri_in_w){
cr.arc_negative(0,0, tri_mid_r, theta0, theta1);
} else {
cr.line_to((roundEdge*tri_w+tri_stem_w)/2,(roundEdge*tri_w+tri_stem_w)/2);
}
// cr.fill();
cr.setClipPath();
cr.clearPath();
// start drawing slots at 10 deg
cr.setRotate(tri_angle);
spacing = (tri_stem_w + tri_w);
y = -tri_out_r;
while (y < tri_out_r){
if ( roundEdge ){
cr.roundedHorizontalRect(-tri_outb_r+2*tri_outb_r,-y -tri_w/2, -2*tri_outb_r, tri_w);
} else {
cr.rectangle(-tri_outb_r+2*tri_outb_r, -y, -2*tri_outb_r, -tri_w);
}
y += spacing;
}
cr.stroke();
cr.clearRotate(); // unrotate
cr.pop_group_to_source();
cr.paint();
return(cr);
}
/**
########################################################
# get_mask_top_boundary( - calculate where the top edge boundary
# of the mask is given
# y0 - the y position of the slot (bottom edge)
# theta - and the rotation angle in radians
# ) - returns the array that gives [x1,y1], [x2,y2] that
# defines the line of the top edge of the mask
########################################################
**/
function get_mask_top_boundary(y0, theta,grot){
x1 = tri_stem_w/2.0;
y1 = tri_stem_w/2.0*Math.tan(theta) + y0/Math.cos(theta);
x2 = Math.cos(theta)*Math.cos(theta)*Math.sqrt((tri_out_r*tri_out_r - y0*y0)/(Math.cos(theta)*Math.cos(theta))) - y0*Math.sin(theta);
y2 = Math.sqrt(tri_out_r*tri_out_r - x2*x2);
return ( [[x1, y1], [x2, y2]] );
}
function svgContext(rootSvg){
var currentParent=rootSvg;
var inPath = null;
var currentStroke;
var currentFill;
var currentOpacity;
var currentStrokeWidth;
var globalRotation=0;
var rotation = 0;
function setGlobalRotation(grot){
globalRotation = grot;
}
function setRotate(angle){
rotation = angle;
}
function clearRotate(){
rotation = 0;
}
function push_group(){
var g = document.createElementNS(svgNs,"g");
g.setAttribute("fill","none");
g.setAttribute("stroke","blue");
g.setAttribute("stroke-width","0.5");
currentParent.appendChild(g);
currentParent = g;
}
function rectangle(x,y,width,height){
if ( height==0){
roundedHorizontalRect(x,y, width, 0);
}else{
move_to(x,y);
line_to((x+width),y);
line_to((x+width),(y+height));
line_to(x,(y+height));
stroke();
}
// currentParent.appendChild(rect);
}
function roundedHorizontalRect(x,y, width, lw){
var dw=lw;
if ( lw==0){
dw=1;
}
move_to(x,y);
line_to(x + width, y);
line_to(x , y - dw); // dummy...
stroke(lw/2);
}
function checkPath(){
if (!inPath){
inPath = svgPath();
}
// console.log("checkPath:",inPath);
}
function transform(x,y){
xr = x* Math.cos(rotation+globalRotation) - y* Math.sin(rotation+globalRotation);
yr = x* Math.sin(rotation+globalRotation) + y* Math.cos(rotation+globalRotation);
return [xr,yr];
}
function move_to(x,y){
var pos = transform(x,y);
checkPath();
inPath.move_to(pos[0],pos[1]);
}
function line_to(x,y){
var pos = transform(x,y);
checkPath();
inPath.line_to(pos[0],pos[1]);
}
function arc(x,y,r,t0,t1,resolution){
var pos = transform(x,y);
checkPath();
inPath.arc(pos[0],pos[1],r,t0+rotation+globalRotation,t1+rotation+globalRotation,false,resolution);
}
function arc_negative(x,y,r,t0,t1){
var pos = transform(x,y);
checkPath();
inPath.arc_negative(pos[0],pos[1],r,t0+rotation+globalRotation,t1+rotation+globalRotation,true);
}
function pop_group_to_source(){
// console.log("pop_gr",currentParent);
// currentParent = currentParent.parentNode();
currentParent = rootSvg;
}
function paint(){ // TBD ?????
if (inPath){
inPath.closePath();
currentParent.appendChild(inPath.getPath());
inPath = null;
}
}
function clearPath(){
inPath = null;
}
function fill(){
if (inPath){
inPath.closePath();
// console.log("fill:",inPath);
if ( clipPath ){
var cpe = inPath.getClippedPath(clipPath);
if ( cpe.getAttribute("d")){
currentParent.appendChild(cpe);
}
} else {
currentParent.appendChild(inPath.getPath());
}
inPath = null;
}
}
function stroke(bw){
if (inPath){
// console.log("stroke:",inPath);
if ( clipPath ){
var cpe = inPath.getClippedPath(clipPath,bw);
if ( cpe.getAttribute("d")){
currentParent.appendChild(cpe);
}
} else {
currentParent.appendChild(inPath.getPath());
}
inPath = null;
}
}
function set_operator(op){ // TBD
}
function set_source_rgb(r,g,b,a){
set_source_rgba(r,g,b,1);
}
function set_source_rgba(r,g,b,a){
currnetFill = "#"+(r+256).toString(16).substring(1)+(g+256).toString(16).substring(1)+(b+256).toString(16).substring(1);
currentStroke = currnetFill;
currentOpacity = a;
}
function setRGBA(elem){ // TBD
elem.setAttribute("opacity",currentOpacity);
elem.setAttribute("fill",currentFill);
elem.setAttribute("stroke",currentStroke);
}
var OPERATOR_DEST_IN = 1;
var OPERATOR_OVER = 2;
var clipPath=null;
function setClipPath(){
if ( inPath ){
clipPath = inPath.getCoordinates();
// console.log(polyCrdStr(clipPath));
}
}
function clearClipPath(){
clipPath = null;
}
function polyCrdStr(poly){
var str ="[";
for ( var i = 0 ; i < poly.length ; i++){
str +="["+(poly[i][0]+300)+","+(poly[i][1]+300)+"]";
if ( i < poly.length -1 ){
str+=",";
} else {
str+="]";
}
}
return(str);
}
return{
setGlobalRotation:setGlobalRotation,
setRotate:setRotate,
clearRotate:clearRotate,
clearPath:clearPath,
clearClipPath:clearClipPath,
setClipPath:setClipPath,
push_group:push_group,
rectangle:rectangle,
move_to:move_to,
line_to:line_to,
arc:arc,
arc_negative:arc_negative,
pop_group_to_source:pop_group_to_source,
paint:paint,
stroke:stroke,
fill:fill,
set_operator:set_operator,
set_source_rgba:set_source_rgba,
set_source_rgb:set_source_rgb,
OPERATOR_DEST_IN:OPERATOR_DEST_IN,
OPERATOR_OVER:OPERATOR_OVER,
roundedHorizontalRect:roundedHorizontalRect
}
}
function svgPath(){
var path = document.createElementNS(svgNs,"path");
var d="";
function move_to(x,y){
d+="M" + x + "," + y ;
}
function line_to(x,y){
d+="L" + x + "," + y ;
}
function closePath(){
d+="Z";
}
var arcRes = 2*Math.PI / 360;
function arc(cx,cy,r,t0,t1,ccw,resolution){
var arcResolution = arcRes;
if ( resolution ){
arcResolution = 2*Math.PI / Math.ceil(resolution);
}
if (t0 === t1) {
return;
}
if ( ccw ){
if(t0 < t1){
t0 += 2 * Math.PI;
}
for ( var t = t0 ; t > t1 ; t-= arcResolution ){
if ( d==""){
d+="M";
} else {
d+="L";
}
d+=(r * Math.cos(t) + cx) +","+ (r * Math.sin(t) + cy) ;
}
d+="L"+ (r * Math.cos(t1) + cx) +","+ (r * Math.sin(t1) + cy) ;
} else {
if(t0 > t1){
t1 += 2 * Math.PI;
}
for ( var t = t0 ; t < t1 ; t+= arcResolution ){
if ( d==""){
d+="M";
} else {
d+="L";
}
d+=(r * Math.cos(t) + cx) +","+ (r * Math.sin(t) + cy) ;
}
d+="L"+ (r * Math.cos(t1) + cx) +","+ (r * Math.sin(t1) + cy) ;
}
// console.log("called arc:",d);
}
function arc_negative(x,y,r,t0,t1){
arc(x,y,r,t0,t1,true);
}
function getPath(){
path.setAttribute("d",d);
return(path);
}
function getClippedPath(clipCrds,bufferWidth){
var srcCrds = getCoordinates();
var bufLine = false;
if ( srcCrds.length == 3 ){
// srcCrds.push([srcCrds[0][0],srcCrds[0][1]-20,true]);
srcCrds[2].push(true);
bufLine = true;
}
console.log("srcCrds:",srcCrds);
// var clippedCrds = clip(srcCrds,clipCrds);
var clippedCrds = clip(clipCrds,srcCrds);
console.log("clippedCrds:",clippedCrds);
// console.log("getClippedPath:",clippedCrds,srcCrds,clipCrds);
var cd ="";
var cc = 0;
if ( bufLine==false ){
for ( var i = 0 ; i < clippedCrds.length ; i++ ){
if ( clippedCrds[i][2]){
} else {
if ( cc==0 ){
cd+="M";
} else {
cd+="L";
}
cd+=clippedCrds[i][0]+","+clippedCrds[i][1];
++cc;
}
}
cd+="Z";
if ( clippedCrds.length >1 ){
path.setAttribute("d",cd);
}
} else {
if ( clippedCrds.length >1 ){
var points=[];
for ( var i = 0 ; i < clippedCrds.length ; i++ ){
if ( clippedCrds[i][2]){
} else {
points.push(clippedCrds[i]);
}
}
if ( points.length > 1 ){
console.log(points);
var bw = bufferWidth;
for ( var i = 0 ; i < points.length ; i = i + 2 ){
var p1 = points[i];
var p2 = points[i+1];
var sx,sy;
console.log(p1,p2);
var theta;
var rp = " 1 1 ";
if ( p1[0]>p2[0] ){
var tp = [p1[0],p1[1]];
p1 = [p2[0],p2[1]];
p2 = tp;
}
if ( p1[0]-p2[0] != 0 ){
theta = Math.atan((p1[1]-p2[1])/(p1[0]-p2[0]));
sx = bw * Math.sin(theta);
sy = bw * Math.cos(theta);
} else {
theta = Math.PI / 2;
sx = bw;
sy = 0;
}
console.log("sx,sy:",sx,sy);
var p1a = [p1[0]-sx,p1[1]+sy];
var p1n = [p1[0]-sy,p1[1]-sx];
var p1b = [p1[0]+sx,p1[1]-sy];
var p2b = [p2[0]-sx,p2[1]+sy];
var p2n = [p2[0]+sy,p2[1]+sx];
var p2a = [p2[0]+sx,p2[1]-sy];
if ( bw > 0 ){
cd +="M"+p1a[0]+","+p1a[1] +
"A"+ bw + " " + bw + " " + theta * 180 / Math.PI + rp +
p1b[0]+","+p1b[1]+"L"+p2a[0]+","+p2a[1]+
"A"+ bw + " " + bw + " " + theta * 180 / Math.PI + rp +
p2b[0]+","+p2b[1]+"Z ";
}else{
cd +="M"+p1a[0]+","+p1a[1] +
"L"+p2a[0]+","+p2a[1]+"Z ";
}
/**
cd +="M"+p1a[0]+","+p1a[1]+"L"+p1n[0]+","+p1n[1]+"L"+p1b[0]+","+p1b[1]+
"L"+p2a[0]+","+p2a[1]+"L"+p2n[0]+","+p2n[1]+"L"+p2b[0]+","+p2b[1]+"Z ";
**/
// cd +="M"+p1a[0]+","+p1a[1]+"L"+p1b[0]+","+p1b[1]+"L"+p2a[0]+","+p2a[1]+"L"+p2b[0]+","+p2b[1]+"Z ";
}
path.setAttribute("d",cd);
}
}
}
return(path);
}
function getCoordinates(){
var crd = d.replace(/M/g,"");
crd = crd.replace(/Z/g,"");
crd = crd.split("L");
for ( var i = 0 ; i < crd.length ; i++ ){
crd[i]=crd[i].split(",");
crd[i][0]=Number(crd[i][0]);
crd[i][1]=Number(crd[i][1]);
}
// console.log(crd);
return ( crd );
}
return{
getCoordinates : getCoordinates,
move_to : move_to,
line_to : line_to,
arc : arc,
arc_negative : arc_negative,
closePath : closePath,
getPath : getPath,
getClippedPath : getClippedPath
}
}
// This is https://rosettacode.org/wiki/Sutherland-Hodgman_polygon_clipping
function clip (subjectPolygon, clipPolygon) {
var cp1, cp2, s, e;
var inside = function (p) {
return (cp2[0]-cp1[0])*(p[1]-cp1[1]) > (cp2[1]-cp1[1])*(p[0]-cp1[0]);
};
var intersection = function () {
var dc = [ cp1[0] - cp2[0], cp1[1] - cp2[1] ],
dp = [ s[0] - e[0], s[1] - e[1] ],
n1 = cp1[0] * cp2[1] - cp1[1] * cp2[0],
n2 = s[0] * e[1] - s[1] * e[0],
n3 = 1.0 / (dc[0] * dp[1] - dc[1] * dp[0]);
if ( cp1[2] || cp2[2] ){
return [(n1*dp[0] - n2*dc[0]) * n3, (n1*dp[1] - n2*dc[1]) * n3, true];
} else {
return [(n1*dp[0] - n2*dc[0]) * n3, (n1*dp[1] - n2*dc[1]) * n3];
}
};
var outputList = subjectPolygon;
cp1 = clipPolygon[clipPolygon.length-1];
for (j in clipPolygon) {
var cp2 = clipPolygon[j];
var inputList = outputList;
outputList = [];
s = inputList[inputList.length - 1]; //last on the input list
for (i in inputList) {
var e = inputList[i];
if (inside(e)) {
if (!inside(s)) {
outputList.push(intersection());
}
if ( cp1[2] ){
outputList.push([e[0],e[1],true]);
} else {
outputList.push(e);
}
}
else if (inside(s)) {
outputList.push(intersection());
}
s = e;
}
cp1 = cp2;
}
return outputList
}
function serializeToString(node) {
try {
// for Firefox, Chrome, Safari, Opera
var vb = node.getAttribute("viewBox").replace(/ /g,",").split(",");
var w = node.getAttribute("width");
var h = node.getAttribute("height");
var phSize = ( Number(vb[2]) / INCH2PIXELS ) + "in";
// console.log("src:",vb,w,h,phSize);
node.setAttribute("width",phSize);
node.setAttribute("height",phSize);
var svgStr = (new XMLSerializer()).serializeToString(node);
node.setAttribute("width",w);
node.setAttribute("height",h);
return (svgStr);
} catch (e) {
try {
// for IE
return node.xml;
} catch (e2) {
alert("I can not serialize DOM node!");
}
}
return false;
}
//########################################################
//# draw_mounting_holes( - draws the mounting holes of the mask
//########################################################
function draw_mounting_holes(cr,grot){
cr.push_group();
cr.set_operator(cr.OPERATOR_OVER);
// cr.set_source_rgba(0, 0, 0, 1);
cr.arc((tri_out_r+(tri_outb_r - tri_out_r)/2.0),0, tri_mount_hole_r, 0,2*Math.PI,36);
cr.paint();
// cr.stroke();
cr.pop_group_to_source();
return(cr);
}
var tb1,tb2,tb3,inW,outW;
var upDownBoundaryStem = false;
var buildMountHoles = false;
var stemWratio = -1;
var orderFactor = 1;
function updateMask(){
changeUnit();
var fl = Number(tb1.value);
var out_r = Number(tb2.value);
var in_r = Number(tb3.value);
var out_w = Number(outW.value);
var in_w = Number(inW.value);
if (paramUiUnit < 3){ // diameter mode
out_r = out_r / 2.0;
in_r = in_r / 2.0;
}
if ( document.getElementById("stemB").checked ){
upDownBoundaryStem = true;
} else {
upDownBoundaryStem = false;
}
/**
if ( document.getElementById("mountH").checked ){
buildMountHoles = true;
} else {
buildMountHoles = false;
}
**/
if ( document.getElementById("equalizeArea").checked ){
equalizeArea = true;
} else {
equalizeArea = false;
}
if ( document.getElementById("thirdO").checked ){
orderFactor = 3.0;
} else {
orderFactor = 1.0;
}
if ( document.getElementById("roundE").checked ){
roundEdge = 1;
} else {
roundEdge = 0;
}
var stemWselect = document.getElementById("stemW").selectedIndex;
stemWratio = Number(document.getElementById("stemW").options[stemWselect].value);
// console.log("stemWratio:",stemWratio);
var BFselect = document.getElementById("bartinovF").selectedIndex;
BAHTINOV_FACTOR = Number(document.getElementById("bartinovF").options[BFselect].value);
if (paramUiUnit % 3 == 0){
// no change
} else if(paramUiUnit % 3 == 1){
out_r = out_r * toMm;
in_r = in_r * toMm;
out_w = out_w * toMm;
in_w = in_w * toMm;
} else if(paramUiUnit % 3 == 2){
fl = fl * toMm;
out_r = out_r * toMm;
in_r = in_r * toMm;
out_w = out_w * toMm;
in_w = in_w * toMm;
}
console.log("out_w:",out_w, " in_w:",in_w);
initParams(fl, out_r, in_r , out_w , in_w );
buildMask();
}
var paramUiUnit = 0;
var toMm = 25.4;
function changeUnit(){
// console.log( "cange unit");
var newUnit = document.getElementById("paramUnit").selectedIndex;
if ( newUnit % 3 == 0 ){ // mm
if ( paramUiUnit % 3 == 1 ){ // f.l.mm
tb1.value = Number(tb1.value);
tb2.value = Number(tb2.value)*toMm;
tb3.value = Number(tb3.value)*toMm;
inW.value = Number(inW.value)*toMm;
outW.value = Number(outW.value)*toMm;
} else if( paramUiUnit % 3 == 2 ){ // in
tb1.value = Number(tb1.value)*toMm;
tb2.value = Number(tb2.value)*toMm;
tb3.value = Number(tb3.value)*toMm;
inW.value = Number(inW.value)*toMm;
outW.value = Number(outW.value)*toMm;
}
} else if ( newUnit % 3 == 1 ){ // f.l. mm
if ( paramUiUnit % 3 == 0 ){ // mm
tb1.value = Number(tb1.value);
tb2.value = Number(tb2.value)/toMm;
tb3.value = Number(tb3.value)/toMm;
inW.value = Number(inW.value)/toMm;
outW.value = Number(outW.value)/toMm;
} else if( paramUiUnit % 3 == 2 ){ // in
tb1.value = Number(tb1.value)*toMm;
tb2.value = Number(tb2.value);
tb3.value = Number(tb3.value);
inW.value = Number(inW.value);
outW.value = Number(outW.value);
}
} else if ( newUnit % 3 == 2 ){ // in
if ( paramUiUnit % 3 == 0 ){ // mm
tb1.value = Number(tb1.value)/toMm;
tb2.value = Number(tb2.value)/toMm;
tb3.value = Number(tb3.value)/toMm;
inW.value = Number(inW.value)/toMm;
outW.value = Number(outW.value)/toMm;
} else if( paramUiUnit % 3 == 1 ){ // f.l.mm
tb1.value = Number(tb1.value)/toMm;
tb2.value = Number(tb2.value);
tb3.value = Number(tb3.value);
inW.value = Number(inW.value);
outW.value = Number(outW.value);