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openjscad.js
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// == openjscad.js, originally written by Joost Nieuwenhuijse (MIT License)
// few adjustments by Rene K. Mueller <[email protected]> for OpenJSCAD.org
//
// History:
// 2013/03/12: reenable webgui parameters to fit in current design
// 2013/03/11: few changes to fit design of http://openjscad.org
OpenJsCad = function() { };
OpenJsCad.log = function(txt) {
var timeInMs = Date.now();
var prevtime = OpenJsCad.log.prevLogTime;
if(!prevtime) prevtime = timeInMs;
var deltatime = timeInMs - prevtime;
OpenJsCad.log.prevLogTime = timeInMs;
var timefmt = (deltatime*0.001).toFixed(3);
txt = "["+timefmt+"] "+txt;
if( (typeof(console) == "object") && (typeof(console.log) == "function") ) {
console.log(txt);
} else if( (typeof(self) == "object") && (typeof(self.postMessage) == "function") ) {
self.postMessage({cmd: 'log', txt: txt});
}
else throw new Error("Cannot log");
};
// A viewer is a WebGL canvas that lets the user view a mesh. The user can
// tumble it around by dragging the mouse.
OpenJsCad.Viewer = function(containerelement, width, height, initialdepth) {
var gl = GL.create();
this.gl = gl;
this.angleX = -60;
this.angleY = 0;
this.angleZ = -45;
this.viewpointX = 0;
this.viewpointY = -5;
this.viewpointZ = initialdepth;
this.touch = {
lastX: 0,
lastY: 0,
scale: 0,
ctrl: 0,
shiftTimer: null,
shiftControl: null,
cur: null //current state
};
// Draw axes flag:
this.drawAxes = true;
// Draw triangle lines:
this.drawLines = false;
// Set to true so lines don't use the depth buffer
this.lineOverlay = false;
// Set up the viewport
gl.canvas.width = width;
gl.canvas.height = height;
gl.viewport(0, 0, width, height);
gl.matrixMode(gl.PROJECTION);
gl.loadIdentity();
gl.perspective(45, width / height, 0.5, 1000);
gl.matrixMode(gl.MODELVIEW);
// Set up WebGL state
gl.blendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA);
gl.clearColor(0.93, 0.93, 0.93, 1);
gl.enable(gl.DEPTH_TEST);
gl.enable(gl.CULL_FACE);
gl.polygonOffset(1, 1);
// Black shader for wireframe
this.blackShader = new GL.Shader('\
void main() {\
gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\
}', '\
void main() {\
gl_FragColor = vec4(0.0, 0.0, 0.0, 0.1);\
}'
);
// Shader with diffuse and specular lighting
this.lightingShader = new GL.Shader('\
varying vec3 color;\
varying float alpha;\
varying vec3 normal;\
varying vec3 light;\
void main() {\
const vec3 lightDir = vec3(1.0, 2.0, 3.0) / 3.741657386773941;\
light = lightDir;\
color = gl_Color.rgb;\
alpha = gl_Color.a;\
normal = gl_NormalMatrix * gl_Normal;\
gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\
}',
'\
varying vec3 color;\
varying float alpha;\
varying vec3 normal;\
varying vec3 light;\
void main() {\
vec3 n = normalize(normal);\
float diffuse = max(0.0, dot(light, n));\
float specular = pow(max(0.0, -reflect(light, n).z), 10.0) * sqrt(diffuse);\
gl_FragColor = vec4(mix(color * (0.3 + 0.7 * diffuse), vec3(1.0), specular), alpha);\
}'
);
var _this=this;
var shiftControl = $('<div class="shift-scene"><div class="arrow arrow-left" />\
<div class="arrow arrow-right" />\
<div class="arrow arrow-top" />\
<div class="arrow arrow-bottom" /></div>');
this.touch.shiftControl = shiftControl;
$(containerelement).append(gl.canvas)
.append(shiftControl)
.hammer({//touch screen control
drag_lock_to_axis: true
}).on("transform", function(e){
if (e.gesture.touches.length >= 2) {
_this.clearShift();
_this.onTransform(e);
e.preventDefault();
}
}).on("touch", function(e) {
if (e.gesture.pointerType != 'touch'){
e.preventDefault();
return;
}
if (e.gesture.touches.length == 1) {
var point = e.gesture.center;
_this.touch.shiftTimer = setTimeout(function(){
shiftControl.addClass('active').css({
left: point.pageX + 'px',
top: point.pageY + 'px'
});
_this.touch.shiftTimer = null;
_this.touch.cur = 'shifting';
}, 500);
} else {
_this.clearShift();
}
}).on("drag", function(e) {
if (e.gesture.pointerType != 'touch') {
e.preventDefault();
return;
}
if (!_this.touch.cur || _this.touch.cur == 'dragging') {
_this.clearShift();
_this.onPanTilt(e);
} else if (_this.touch.cur == 'shifting') {
_this.onShift(e);
}
}).on("touchend", function(e) {
_this.clearShift();
if (_this.touch.cur) {
shiftControl.removeClass('active shift-horizontal shift-vertical');
}
}).on("transformend dragstart dragend", function(e) {
if ((e.type == 'transformend' && _this.touch.cur == 'transforming') ||
(e.type == 'dragend' && _this.touch.cur == 'shifting') ||
(e.type == 'dragend' && _this.touch.cur == 'dragging'))
_this.touch.cur = null;
_this.touch.lastX = 0;
_this.touch.lastY = 0;
_this.touch.scale = 0;
});
gl.onmousemove = function(e) {
_this.onMouseMove(e);
};
gl.ondraw = function() {
_this.onDraw();
};
containerelement.onresize = function(e) { // is not called
// var viewer = document.getElementById('viewer');
// fix distortion after resize of canvas
//gl.perspective(45, viewer.offsetWidth / viewer.offsetHeight, 0.5, 1000);
//_this.gl.perspective(45, containerelement.offsetWidth / containerelement.offsetHeight, 0.5, 1000);
alert("canvas has been resized");
};
gl.onmousewheel = function(e) {
var wheelDelta = 0;
if (e.wheelDelta) {
wheelDelta = e.wheelDelta;
} else if (e.detail) {
// for firefox, see http://stackoverflow.com/questions/8886281/event-wheeldelta-returns-undefined
wheelDelta = e.detail * -40;
}
if(wheelDelta) {
var factor = Math.pow(1.003, -wheelDelta);
var coeff = _this.getZoom();
coeff *= factor;
_this.setZoom(coeff);
}
};
this.clear();
};
OpenJsCad.Viewer.prototype = {
setCsg: function(csg) {
if(0&&csg.length) { // preparing multiple CSG's (not union-ed), not yet working
for(var i=0; i<csg.length; i++)
this.meshes.concat(OpenJsCad.Viewer.csgToMeshes(csg[i]));
} else {
this.meshes = OpenJsCad.Viewer.csgToMeshes(csg);
}
this.onDraw();
},
clear: function() {
// empty mesh list:
this.meshes = [];
this.onDraw();
},
supported: function() {
return !!this.gl;
},
ZOOM_MAX: 1000,
ZOOM_MIN: 10,
onZoomChanged: null,
plate: true, // render plate
setZoom: function(coeff) { //0...1
coeff=Math.max(coeff, 0);
coeff=Math.min(coeff, 1);
this.viewpointZ = this.ZOOM_MIN + coeff * (this.ZOOM_MAX - this.ZOOM_MIN);
if(this.onZoomChanged) {
this.onZoomChanged();
}
this.onDraw();
},
getZoom: function() {
var coeff = (this.viewpointZ-this.ZOOM_MIN) / (this.ZOOM_MAX - this.ZOOM_MIN);
return coeff;
},
onMouseMove: function(e) {
if (e.dragging) {
//console.log(e.which,e.button);
var b = e.button;
if(e.which) { // RANT: not even the mouse buttons are coherent among the brand (chrome,firefox,etc)
b = e.which;
}
e.preventDefault();
if(e.altKey||b==3) { // ROTATE X,Y (ALT or right mouse button)
this.angleY += e.deltaX;
this.angleX += e.deltaY;
//this.angleX = Math.max(-180, Math.min(180, this.angleX));
} else if(e.shiftKey||b==2) { // PAN (SHIFT or middle mouse button)
var factor = 5e-3;
this.viewpointX += factor * e.deltaX * this.viewpointZ;
this.viewpointY -= factor * e.deltaY * this.viewpointZ;
} else if(e.ctrlKey) { // ZOOM IN/OU
var factor = Math.pow(1.006, e.deltaX+e.deltaY);
var coeff = this.getZoom();
coeff *= factor;
this.setZoom(coeff);
} else { // ROTATE X,Z left mouse button
this.angleZ += e.deltaX;
this.angleX += e.deltaY;
}
this.onDraw();
}
},
clearShift: function() {
if(this.touch.shiftTimer) {
clearTimeout(this.touch.shiftTimer);
this.touch.shiftTimer = null;
}
return this;
},
//pan & tilt with one finger
onPanTilt: function(e) {
this.touch.cur = 'dragging';
var delta = 0;
if (this.touch.lastY && (e.gesture.direction == 'up' || e.gesture.direction == 'down')) {
//tilt
delta = e.gesture.deltaY - this.touch.lastY;
this.angleX += delta;
} else if (this.touch.lastX && (e.gesture.direction == 'left' || e.gesture.direction == 'right')) {
//pan
delta = e.gesture.deltaX - this.touch.lastX;
this.angleZ += delta;
}
if (delta)
this.onDraw();
this.touch.lastX = e.gesture.deltaX;
this.touch.lastY = e.gesture.deltaY;
},
//shift after 0.5s touch&hold
onShift: function(e) {
this.touch.cur = 'shifting';
var factor = 5e-3;
var delta = 0;
if (this.touch.lastY && (e.gesture.direction == 'up' || e.gesture.direction == 'down')) {
this.touch.shiftControl
.removeClass('shift-horizontal')
.addClass('shift-vertical')
.css('top', e.gesture.center.pageY + 'px');
delta = e.gesture.deltaY - this.touch.lastY;
this.viewpointY -= factor * delta * this.viewpointZ;
this.angleX += delta;
}
if (this.touch.lastX && (e.gesture.direction == 'left' || e.gesture.direction == 'right')) {
this.touch.shiftControl
.removeClass('shift-vertical')
.addClass('shift-horizontal')
.css('left', e.gesture.center.pageX + 'px');
delta = e.gesture.deltaX - this.touch.lastX;
this.viewpointX += factor * delta * this.viewpointZ;
this.angleZ += delta;
}
if (delta)
this.onDraw();
this.touch.lastX = e.gesture.deltaX;
this.touch.lastY = e.gesture.deltaY;
},
//zooming
onTransform: function(e) {
this.touch.cur = 'transforming';
if (this.touch.scale) {
var factor = 1 / (1 + e.gesture.scale - this.touch.scale);
var coeff = this.getZoom();
coeff *= factor;
this.setZoom( coeff);
}
this.touch.scale = e.gesture.scale;
return this;
},
onDraw: function(e) {
var gl = this.gl;
gl.makeCurrent();
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
gl.loadIdentity();
gl.translate(this.viewpointX, this.viewpointY, -this.viewpointZ);
gl.rotate(this.angleX, 1, 0, 0);
gl.rotate(this.angleY, 0, 1, 0);
gl.rotate(this.angleZ, 0, 0, 1);
gl.enable(gl.BLEND);
//gl.disable(gl.DEPTH_TEST);
if (!this.lineOverlay) gl.enable(gl.POLYGON_OFFSET_FILL);
for (var i = 0; i < this.meshes.length; i++) {
var mesh = this.meshes[i];
this.lightingShader.draw(mesh, gl.TRIANGLES);
}
if (!this.lineOverlay) gl.disable(gl.POLYGON_OFFSET_FILL);
gl.disable(gl.BLEND);
//gl.enable(gl.DEPTH_TEST);
if(this.drawLines) {
if (this.lineOverlay) gl.disable(gl.DEPTH_TEST);
gl.enable(gl.BLEND);
for (var i = 0; i < this.meshes.length; i++) {
var mesh = this.meshes[i];
this.blackShader.draw(mesh, gl.LINES);
}
gl.disable(gl.BLEND);
if (this.lineOverlay) gl.enable(gl.DEPTH_TEST);
}
//EDW: axes
if (this.drawAxes) {
gl.enable(gl.BLEND);
gl.blendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA);
gl.begin(gl.LINES);
var plate = 200;
if(this.plate) {
gl.color(.8,.8,.8,.5); // -- minor grid
for(var x=-plate/2; x<=plate/2; x++) {
if(x%10) {
gl.vertex(-plate/2, x, 0);
gl.vertex(plate/2, x, 0);
gl.vertex(x, -plate/2, 0);
gl.vertex(x, plate/2, 0);
}
}
gl.color(.5,.5,.5,.5); // -- major grid
for(var x=-plate/2; x<=plate/2; x+=10) {
gl.vertex(-plate/2, x, 0);
gl.vertex(plate/2, x, 0);
gl.vertex(x, -plate/2, 0);
gl.vertex(x, plate/2, 0);
}
}
if(0) {
//X - red
gl.color(1, 0.5, 0.5, 0.2); //negative direction is lighter
gl.vertex(-100, 0, 0);
gl.vertex(0, 0, 0);
gl.color(1, 0, 0, 0.8); //positive direction
gl.vertex(0, 0, 0);
gl.vertex(100, 0, 0);
//Y - green
gl.color(0.5, 1, 0.5, 0.2); //negative direction is lighter
gl.vertex(0, -100, 0);
gl.vertex(0, 0, 0);
gl.color(0, 1, 0, 0.8); //positive direction
gl.vertex(0, 0, 0);
gl.vertex(0, 100, 0);
//Z - black
gl.color(0.5, 0.5, 0.5, 0.2); //negative direction is lighter
gl.vertex(0, 0, -100);
gl.vertex(0, 0, 0);
gl.color(0.2, 0.2, 0.2, 0.8); //positive direction
gl.vertex(0, 0, 0);
gl.vertex(0, 0, 100);
}
if(0) {
gl.triangle();
gl.color(0.6, 0.2, 0.6, 0.2); //positive direction
gl.vertex(-plate,-plate,0);
gl.vertex(plate,-plate,0);
gl.vertex(plate,plate,0);
gl.end();
gl.triangle();
gl.color(0.6, 0.2, 0.6, 0.2); //positive direction
gl.vertex(plate,plate,0);
gl.vertex(-plate,plate,0);
gl.vertex(-plate,-plate,0);
gl.end();
}
gl.end();
gl.disable(gl.BLEND);
// GL.Mesh.plane({ detailX: 20, detailY: 40 });
}
}
};
// Convert from CSG solid to an array of GL.Mesh objects
// limiting the number of vertices per mesh to less than 2^16
OpenJsCad.Viewer.csgToMeshes = function(initial_csg) {
var csg = initial_csg.canonicalized();
var mesh = new GL.Mesh({ normals: true, colors: true });
var meshes = [ mesh ];
var vertexTag2Index = {};
var vertices = [];
var colors = [];
var triangles = [];
// set to true if we want to use interpolated vertex normals
// this creates nice round spheres but does not represent the shape of
// the actual model
var smoothlighting = false;
var polygons = csg.toPolygons();
var numpolygons = polygons.length;
for(var j = 0; j < numpolygons; j++) {
var polygon = polygons[j];
var color = [1,.4,1,1]; // -- default color
if(polygon.shared && polygon.shared.color) {
color = polygon.shared.color;
}
if(polygon.color) {
color = polygon.color;
}
if (color.length < 4)
color.push(1.); //opaque
var indices = polygon.vertices.map(function(vertex) {
var vertextag = vertex.getTag();
var vertexindex;
if(smoothlighting && (vertextag in vertexTag2Index)) {
vertexindex = vertexTag2Index[vertextag];
} else {
vertexindex = vertices.length;
vertexTag2Index[vertextag] = vertexindex;
vertices.push([vertex.pos.x, vertex.pos.y, vertex.pos.z]);
colors.push(color);
}
return vertexindex;
});
for (var i = 2; i < indices.length; i++) {
triangles.push([indices[0], indices[i - 1], indices[i]]);
}
// if too many vertices, start a new mesh;
if (vertices.length > 65000) {
// finalize the old mesh
mesh.triangles = triangles;
mesh.vertices = vertices;
mesh.colors = colors;
mesh.computeWireframe();
mesh.computeNormals();
// start a new mesh
mesh = new GL.Mesh({ normals: true, colors: true });
triangles = [];
colors = [];
vertices = [];
meshes.push(mesh);
}
}
// finalize last mesh
mesh.triangles = triangles;
mesh.vertices = vertices;
mesh.colors = colors;
mesh.computeWireframe();
mesh.computeNormals();
return meshes;
};
// this is a bit of a hack; doesn't properly supports urls that start with '/'
// but does handle relative urls containing ../
OpenJsCad.makeAbsoluteUrl = function(url, baseurl) {
if(!url.match(/^[a-z]+\:/i)) {
var basecomps = baseurl.split("/");
if(basecomps.length > 0) {
basecomps.splice(basecomps.length - 1, 1);
}
var urlcomps = url.split("/");
var comps = basecomps.concat(urlcomps);
var comps2 = [];
comps.map(function(c) {
if(c == "..") {
if(comps2.length > 0) {
comps2.splice(comps2.length - 1, 1);
}
} else {
comps2.push(c);
}
});
url = "";
for(var i = 0; i < comps2.length; i++) {
if(i > 0) url += "/";
url += comps2[i];
}
}
return url;
};
OpenJsCad.isChrome = function() {
return (navigator.userAgent.search("Chrome") >= 0);
};
// This is called from within the web worker. Execute the main() function of the supplied script
// and post a message to the calling thread when finished
OpenJsCad.runMainInWorker = function(mainParameters) {
try {
if(typeof(main) != 'function') throw new Error('Your jscad file should contain a function main() which returns a CSG solid or a CAG area.');
OpenJsCad.log.prevLogTime = Date.now();
var result = main(mainParameters);
if( (typeof(result) != "object") || ((!(result instanceof CSG)) && (!(result instanceof CAG)))) {
//throw new Error("Your main() function should return a CSG solid or a CAG area.");
}
if(result.length) { // main() return an array, we consider it a bunch of CSG not intersecting
var o = result[0];
if(o instanceof CAG) {
o = o.extrude({offset: [0,0,0.1]});
}
for(var i=1; i<result.length; i++) {
var c = result[i];
if(c instanceof CAG) {
c = c.extrude({offset: [0,0,0.1]});
}
o = o.unionForNonIntersecting(c);
}
result = o;
}
var result_compact = result.toCompactBinary();
result = null; // not needed anymore
self.postMessage({cmd: 'rendered', result: result_compact});
}
catch(e) {
var errtxt = e.stack;
if(!errtxt) {
errtxt = e.toString();
}
self.postMessage({cmd: 'error', err: errtxt});
}
};
OpenJsCad.parseJsCadScriptSync = function(script, mainParameters, debugging) {
var workerscript = "//SYNC\n";
workerscript += "_includePath = "+JSON.stringify(_includePath)+";\n";
workerscript += script;
if(debugging) {
workerscript += "\n\n\n\n\n\n\n/* -------------------------------------------------------------------------\n";
workerscript += "OpenJsCad debugging\n\nAssuming you are running Chrome:\nF10 steps over an instruction\nF11 steps into an instruction\n";
workerscript += "F8 continues running\nPress the (||) button at the bottom to enable pausing whenever an error occurs\n";
workerscript += "Click on a line number to set or clear a breakpoint\n";
workerscript += "For more information see: http://code.google.com/chrome/devtools/docs/overview.html\n\n";
workerscript += "------------------------------------------------------------------------- */\n";
workerscript += "\n\n// Now press F11 twice to enter your main() function:\n\n";
workerscript += "debugger;\n";
}
workerscript += "var me = " + JSON.stringify(me) + ";\n";
workerscript += "return main("+JSON.stringify(mainParameters)+");";
// trying to get include() somewhere:
// 1) XHR works for SYNC <---
// 2) importScripts() does not work in SYNC
// 3) _csg_libraries.push(fn) provides only 1 level include()
workerscript += "function include(fn) {\
if(0) {\
_csg_libraries.push(fn);\
} else if(0) {\
var url = _includePath!=='undefined'?_includePath:'./';\
var index = url.indexOf('index.html');\
if(index!=-1) {\
url = url.substring(0,index);\
}\
importScripts(url+fn);\
} else {\
console.log('SYNC checking gMemFs for '+fn);\
if(gMemFs[fn]) {\
console.log('found locally & eval:',gMemFs[fn].name);\
eval(gMemFs[fn].source); return;\
}\
var xhr = new XMLHttpRequest();\
xhr.open('GET',_includePath+fn,false);\
console.log('include:'+_includePath+fn);\
xhr.onload = function() {\
var src = this.responseText;\
eval(src);\
};\
xhr.onerror = function() {\
};\
xhr.send();\
}\
}\
";
//workerscript += "function includePath(p) { _includePath = p; }\n";
if(0) {
OpenJsCad.log.prevLogTime = Date.now();
return eval(workerscript); // old fashion-way
} else {
var f = new Function(workerscript);
OpenJsCad.log.prevLogTime = Date.now();
return f(); // execute the actual code
}
};
// callback: should be function(error, csg)
OpenJsCad.parseJsCadScriptASync = function(script, mainParameters, options, callback) {
var baselibraries = [
"csg.js",
"openjscad.js",
"openscad.js"
//"jquery/jquery-1.9.1.js",
//"jquery/jquery-ui.js"
];
var baseurl = document.location.href.replace(/\?.*$/, '');
baseurl = baseurl.replace(/#.*$/,''); // remove remote URL
var openjscadurl = baseurl;
if (options['openJsCadPath'] != null) {
openjscadurl = OpenJsCad.makeAbsoluteUrl( options['openJsCadPath'], baseurl );
}
var libraries = [];
if (options['libraries'] != null) {
libraries = options['libraries'];
}
for(var i in gMemFs) { // let's test all files and check syntax before we do anything
var src = gMemFs[i].source+"\nfunction include() { }\n";
var f;
try {
f = new Function(src);
} catch(e) {
this.setError(i+": "+e.message);
}
}
var workerscript = "//ASYNC\n";
workerscript += "var me = " + JSON.stringify(me) + ";\n";
workerscript += "var _csg_baseurl=" + JSON.stringify(baseurl)+";\n"; // -- we need it early for include()
workerscript += "var _includePath=" + JSON.stringify(_includePath)+";\n"; // '' ''
workerscript += "var gMemFs = [];\n";
var ignoreInclude = false;
var mainFile;
for(var fn in gMemFs) {
workerscript += "// "+gMemFs[fn].name+":\n";
//workerscript += gMemFs[i].source+"\n";
if(!mainFile)
mainFile = fn;
if(fn=='main.jscad'||fn.match(/\/main.jscad$/))
mainFile = fn;
workerscript += "gMemFs[\""+gMemFs[fn].name+"\"] = "+JSON.stringify(gMemFs[fn].source)+";\n";
ignoreInclude = true;
}
if(ignoreInclude) {
workerscript += "eval(gMemFs['"+mainFile+"']);\n";
} else {
workerscript += script;
}
workerscript += "\n\n\n\n//// The following code is added by OpenJsCad + OpenJSCAD.org:\n";
workerscript += "var _csg_baselibraries=" + JSON.stringify(baselibraries)+";\n";
workerscript += "var _csg_libraries=" + JSON.stringify(libraries)+";\n";
workerscript += "var _csg_openjscadurl=" + JSON.stringify(openjscadurl)+";\n";
workerscript += "var _csg_makeAbsoluteURL=" + OpenJsCad.makeAbsoluteUrl.toString()+";\n";
// workerscript += "if(typeof(libs) == 'function') _csg_libraries = _csg_libraries.concat(libs());\n";
workerscript += "_csg_baselibraries = _csg_baselibraries.map(function(l){return _csg_makeAbsoluteURL(l,_csg_openjscadurl);});\n";
workerscript += "_csg_libraries = _csg_libraries.map(function(l){return _csg_makeAbsoluteURL(l,_csg_baseurl);});\n";
workerscript += "_csg_baselibraries.map(function(l){importScripts(l)});\n";
workerscript += "_csg_libraries.map(function(l){importScripts(l)});\n";
workerscript += "self.addEventListener('message', function(e) {if(e.data && e.data.cmd == 'render'){";
workerscript += " OpenJsCad.runMainInWorker("+JSON.stringify(mainParameters)+");";
// workerscript += " if(typeof(main) != 'function') throw new Error('Your jscad file should contain a function main() which returns a CSG solid.');\n";
// workerscript += " var csg; try {csg = main("+JSON.stringify(mainParameters)+"); self.postMessage({cmd: 'rendered', csg: csg});}";
// workerscript += " catch(e) {var errtxt = e.stack; self.postMessage({cmd: 'error', err: errtxt});}";
workerscript += "}},false);\n";
// trying to get include() somewhere:
// 1) XHR fails: not allowed in blobs
// 2) importScripts() works for ASYNC <----
// 3) _csg_libraries.push(fn) provides only 1 level include()
if(!ignoreInclude) {
workerscript += "function include(fn) {\
if(0) {\
_csg_libraries.push(fn);\
} else if(1) {\
if(gMemFs[fn]) {\
eval(gMemFs[fn]); return;\
}\
var url = _csg_baseurl+_includePath;\
var index = url.indexOf('index.html');\
if(index!=-1) {\
url = url.substring(0,index);\
}\
importScripts(url+fn);\
} else {\
var xhr = new XMLHttpRequest();\
xhr.open('GET', _includePath+fn, true);\
xhr.onload = function() {\
return eval(this.responseText);\
};\
xhr.onerror = function() {\
};\
xhr.send();\
}\
}\
";
} else {
//workerscript += "function include() {}\n";
workerscript += "function include(fn) { eval(gMemFs[fn]); }\n";
}
//workerscript += "function includePath(p) { _includePath = p; }\n";
var blobURL = OpenJsCad.textToBlobUrl(workerscript);
if(!window.Worker) throw new Error("Your browser doesn't support Web Workers. Please try the Chrome or Firefox browser instead.");
var worker = new Worker(blobURL);
worker.onmessage = function(e) {
if(e.data)
{
if(e.data.cmd == 'rendered')
{
var resulttype = e.data.result.class;
var result;
if(resulttype == "CSG")
{
result = CSG.fromCompactBinary(e.data.result);
}
else if(resulttype == "CAG")
{
result = CAG.fromCompactBinary(e.data.result);
}
else
{
throw new Error("Cannot parse result");
}
callback(null, result);
}
else if(e.data.cmd == "error")
{
callback(e.data.err, null);
}
else if(e.data.cmd == "log")
{
console.log(e.data.txt);
}
}
};
worker.onerror = function(e) {
var errtxt = "Error in line "+e.lineno+": "+e.message;
callback(errtxt, null);
};
worker.postMessage({
cmd: "render"
}); // Start the worker.
return worker;
};
OpenJsCad.getWindowURL = function() {
if(window.URL) return window.URL;
else if(window.webkitURL) return window.webkitURL;
else throw new Error("Your browser doesn't support window.URL");
};
OpenJsCad.textToBlobUrl = function(txt) {
var windowURL=OpenJsCad.getWindowURL();
var blob = new Blob([txt]);
var blobURL = windowURL.createObjectURL(blob);
if(!blobURL) throw new Error("createObjectURL() failed");
return blobURL;
};
OpenJsCad.revokeBlobUrl = function(url) {
if(window.URL) window.URL.revokeObjectURL(url);
else if(window.webkitURL) window.webkitURL.revokeObjectURL(url);
else throw new Error("Your browser doesn't support window.URL");
};
OpenJsCad.FileSystemApiErrorHandler = function(fileError, operation) {
var errormap = {
1: 'NOT_FOUND_ERR',
2: 'SECURITY_ERR',
3: 'ABORT_ERR',
4: 'NOT_READABLE_ERR',
5: 'ENCODING_ERR',
6: 'NO_MODIFICATION_ALLOWED_ERR',
7: 'INVALID_STATE_ERR',
8: 'SYNTAX_ERR',
9: 'INVALID_MODIFICATION_ERR',
10: 'QUOTA_EXCEEDED_ERR',
11: 'TYPE_MISMATCH_ERR',
12: 'PATH_EXISTS_ERR',
};
var errname;
if(fileError.code in errormap)
{
errname = errormap[fileError.code];
}
else
{
errname = "Error #"+fileError.code;
}
var errtxt = "FileSystem API error: "+operation+" returned error "+errname;
throw new Error(errtxt);
};
OpenJsCad.AlertUserOfUncaughtExceptions = function() {
window.onerror = function(message, url, line) {
message = message.replace(/^Uncaught /i, "");
alert(message+"\n\n("+url+" line "+line+")");
};
};
// parse the jscad script to get the parameter definitions
OpenJsCad.getParamDefinitions = function(script) {
var scriptisvalid = true;
script += "\nfunction include() {}"; // at least make it not throw an error so early
try
{
// first try to execute the script itself
// this will catch any syntax errors
// BUT we can't introduce any new function!!!
(new Function(script))();
}
catch(e) {
scriptisvalid = false;
}
var params = [];
if(scriptisvalid)
{
var script1 = "if(typeof(getParameterDefinitions) == 'function') {return getParameterDefinitions();} else {return [];} ";
script1 += script;
var f = new Function(script1);
params = f();
if( (typeof(params) != "object") || (typeof(params.length) != "number") )
{
throw new Error("The getParameterDefinitions() function should return an array with the parameter definitions");
}
}
return params;
};
OpenJsCad.Processor = function(containerdiv, onchange) {
this.containerdiv = containerdiv;
this.onchange = onchange;
this.viewerdiv = null;
this.viewer = null;
this.zoomControl = null;
//this.viewerwidth = 1200;
//this.viewerheight = 800;
this.initialViewerDistance = 100;
this.processing = false;
this.currentObject = null;
this.hasValidCurrentObject = false;
this.hasOutputFile = false;
this.worker = null;
this.paramDefinitions = [];
this.paramControls = [];
this.script = null;
this.hasError = false;
this.debugging = false;
this.options = {};
this.createElements();
};
OpenJsCad.Processor.convertToSolid = function(obj) {
//echo("typeof="+typeof(obj),obj.length);
if( (typeof(obj) == "object") && ((obj instanceof CAG)) ) {
// convert a 2D shape to a thin solid:
obj = obj.extrude({offset: [0,0,0.1]});
} else if( (typeof(obj) == "object") && ((obj instanceof CSG)) ) {
// obj already is a solid, nothing to do
;
} else if(obj.length) { // main() return an array, we consider it a bunch of CSG not intersecting
//echo("putting them together");
var o = obj[0];
for(var i=1; i<obj.length; i++) {
o = o.unionForNonIntersecting(obj[i]);
}
obj = o;
//echo("done.");
} else {
throw new Error("Cannot convert to solid");
}
return obj;
};
OpenJsCad.Processor.prototype = {
createElements: function() {
var that = this; // for event handlers
while(this.containerdiv.children.length > 0)
{
this.containerdiv.removeChild(0);
}
/*
if(!OpenJsCad.isChrome() )
{
var div = document.createElement("div");
div.innerHTML = "Please note: OpenJsCad currently only runs reliably on Google Chrome!";
this.containerdiv.appendChild(div);
}
*/
var viewerdiv = document.createElement("div");
viewerdiv.className = "viewer";
viewerdiv.style.width = '100%'; //this.viewerwidth; // + "px";
viewerdiv.style.height = '100%'; //this.viewerheight; // + "px";
viewerdiv.style.width = screen.width;
viewerdiv.style.height = screen.height;
//viewerdiv.style.overflow = 'hidden';
viewerdiv.style.backgroundColor = "rgb(200,200,200)";
this.containerdiv.appendChild(viewerdiv);
this.viewerdiv = viewerdiv;
try {
//this.viewer = new OpenJsCad.Viewer(this.viewerdiv, this.viewerwidth, this.viewerheight, this.initialViewerDistance);
//this.viewer = new OpenJsCad.Viewer(this.viewerdiv, viewerdiv.offsetWidth, viewer.offsetHeight, this.initialViewerDistance);
this.viewer = new OpenJsCad.Viewer(this.viewerdiv, screen.width, screen.height, this.initialViewerDistance);
} catch(e) {
// this.viewer = null;
this.viewerdiv.innerHTML = "<b><br><br>Error: " + e.toString() + "</b><br><br>OpenJsCad currently requires Google Chrome or Firefox with WebGL enabled";
// this.viewerdiv.innerHTML = e.toString();
}
//Zoom control
if(0) {
var div = document.createElement("div");
this.zoomControl = div.cloneNode(false);
this.zoomControl.style.width = this.viewerwidth + 'px';
this.zoomControl.style.height = '20px';
this.zoomControl.style.backgroundColor = 'transparent';
this.zoomControl.style.overflowX = 'scroll';
div.style.width = this.viewerwidth * 11 + 'px';
div.style.height = '1px';
this.zoomControl.appendChild(div);
this.zoomChangedBySlider = false;
this.zoomControl.onscroll = function(event) {
var zoom = that.zoomControl;
var newzoom=zoom.scrollLeft / (10 * zoom.offsetWidth);
that.zoomChangedBySlider=true; // prevent recursion via onZoomChanged
that.viewer.setZoom(newzoom);
that.zoomChangedBySlider=false;
};
this.viewer.onZoomChanged = function() {
if(!that.zoomChangedBySlider)
{
var newzoom = that.viewer.getZoom();
that.zoomControl.scrollLeft = newzoom * (10 * that.zoomControl.offsetWidth);
}
};
this.containerdiv.appendChild(this.zoomControl);
//this.zoomControl.scrollLeft = this.viewer.viewpointZ / this.viewer.ZOOM_MAX * this.zoomControl.offsetWidth;
this.zoomControl.scrollLeft = this.viewer.viewpointZ / this.viewer.ZOOM_MAX *
(this.zoomControl.scrollWidth - this.zoomControl.offsetWidth);
//end of zoom control
}
//this.errordiv = document.createElement("div");
this.errordiv = document.getElementById("errordiv");