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index014.html
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<!DOCTYPE html>
<html>
<head>
<!-- Load the Paper.js library -->
<script type="text/javascript" src="paper-full.min.js"></script>
<script type="text/javascript" src="config.js"></script>
<script type="text/javascript" src="testcam.js"></script>
<!-- Define inlined PaperScript associate it with myCanvas -->
<script type="text/paperscript" canvas="myCanvas">
// Cam/follower mechanism simulator by Jumpjack
// Version 0.1.4
// Added pressure angle path (hence circular cam moved to the right to get some space)
// Fixed bug of bad calculation of follower contact point;
// Added orange colorization for invalid concatc point of follower
// Added cam eccentricity (= follower horizontal offset); to do: fix flat path marker for eccentricity !=0
//
// Version 0.1.3
// Added flat path markers
// Added display of rotation angle value
// Added slider for manual rotation
// Added import/export SVG
// Grouped import/export buttons
// Cleaned up code
// Increased resolution of circular path (indepdendent of flat path resolution)
// Version 0.1.2
// Added exporting to SVG format.
// Please use one of these servies to convert to STL for 3d printing:
// https://rawgit.com/ryancalme/svg-to-stl/master/SVGtoSTL.html (source: https://github.com/rcalme/svg-to-stl )
// http://svg2stl.com/
// Version 0.1.1
// Added pressure angle
// Version 0.1.0 - First public version - 11/11/2021
// To do:
// editable flat path;
// export in SVG format;
// export in STL format;
// tunable rotation speed/direction;
// add speed chart, angle chart, acceleration chart,...
// Known problems:
// Can't handle properly two points at same angle in flat path
///////////////////////////////////////////////////////////////
// Init internal variables and constants:
ANGLE_OFFSET = -90; // Internally used to have the cam profile starting at top rather than at right
CAM_RADIUS = 100;
CAM_CENTER_X = 500;
CAM_CENTER_Y = 230;
GRID_X_OFFSET = 10;
GRID_Y_OFFSET = 10;
CAM_WIDTH = config.pathWidth;
CAM_LINE_COLOR = config.lineColor;
CAM_FILL_COLOR = config.fillColor;
CAM_POINTS_COLOR = config.pointsColor;
CAM_FLATPATH_COLOR = config.flatpathColor;
CAM_FLATPATH_POINTS_COLOR = config.flatpathPointsColor;
CAM_FLATPATH_WIDTH = config.flatpathWidth;
CIRCULAR_PRECISION = 1;
FOLLOWER_LENGTH = config.followerLength;
FOLLOWER_COLOR = config.followerColor;
FOLLOWER_WIDTH = config.followerWidth;
followerOffsetX = config.initialFollowerOffsetX;
followerOffsetY = config.initialFollowerOffsetY;
FOLLOWER_TOP = new Point(CAM_CENTER_X + followerOffsetX, CAM_CENTER_Y + followerOffsetY - CAM_RADIUS);
FOLLOWER_BOTTOM = new Point(CAM_CENTER_X + followerOffsetX, CAM_CENTER_Y + followerOffsetY - CAM_RADIUS - FOLLOWER_LENGTH);
MAX_PRESSURE = config.maxPressure;
NORMAL_COLOR = config.normalColor;
NORMAL_WIDTH = config.normalWidth;
ZERO_ZERO = new Point(0 + GRID_X_OFFSET, 0 + GRID_Y_OFFSET);
UPPER_POINT = new Point(0 + GRID_X_OFFSET,CAM_RADIUS+ GRID_Y_OFFSET);
BOTTOM = new Point(CAM_CENTER_X + GRID_X_OFFSET, CAM_CENTER_Y+200 + GRID_Y_OFFSET);
verticalLines = [];
radii =[]; // Reference lines
radiiReference = [];
gridToFront = false;
gridCircles = [];
gridCirclesCount = 0;
flatPathPointMarker = [];
intersector = null; // Vertical line intersecating flat cam profile, used to generate circular profile
allowRotation = false;
camCreated = false;
flatPath = new Path();
camPath = new Path();
camStaticReference = new Path();
camStaticReference.visible=false;
follower = new Path();
normalVector = new Path();
normalVector.strokeColor = NORMAL_COLOR;
normalVector.strokeWidth = NORMAL_WIDTH;
flatPathBall = new Path.Circle({
center: ZERO_ZERO.clone(),
radius: 5,
strokeColor: '#000000',
fillColor: '#00AA00'
});
pressureAnglePointInitialY = 220 + GRID_Y_OFFSET;
pressureAnglePointInitialPosition = new Point(0 + GRID_X_OFFSET, pressureAnglePointInitialY );
pressureAnglePoint = new Path.Circle({
center: pressureAnglePointInitialPosition,
radius: 5,
strokeColor: '#000000',
fillColor: '#FFFF00'
});
pressureAnglePath = new Path();
pressureAnglePath.strokeColor = '#000000';
pressureAnglePath.strokeWidth = 3;
pressureAnglePath.visible=true;
pointToAdd = null;
pressureAngle= 0;
prevX = 0;
prevY = 0;
contactExists = false;
camType = "JSON"; // Default preloaded cam
function drawMarkers() {
localAngle = 360-totAngle;
if (localAngle < 0) localAngle += 360;
pressureAnglePoint.position.x = localAngle + GRID_X_OFFSET;
pressureAnglePoint.position.y = pressureAnglePointInitialY + pressureAngle;
flatPathBall.position.x = localAngle + GRID_X_OFFSET;
flatPathBall.position.y = followerContactPoint.y - 130 + GRID_Y_OFFSET;
}
function createPressureAnglePath() {
pressureAnglePath.clear();
for (var i=0; i < 360; i++) {
pressureAnglePath.add(new Point(i + GRID_X_OFFSET, pressureAnglePointInitialY + pressureAngle ));
}
dummy = new Path();
dummy.strokeColor = '#000000';
dummy.moveTo(new Point(15 + GRID_X_OFFSET, pressureAnglePointInitialY - 90 ));
dummy.add(new Point(360 + GRID_X_OFFSET, pressureAnglePointInitialY - 90 ));
var pressureText = new paper.PointText();
pressureText.content='+90';
pressureText.position.y = pressureAnglePointInitialY - 90 ;
dummy = new Path(); // Max
dummy.strokeColor = '#FF0000';
dummy.moveTo(new Point(15 + GRID_X_OFFSET, pressureAnglePointInitialY - MAX_PRESSURE ));
dummy.add(new Point(360 + GRID_X_OFFSET, pressureAnglePointInitialY - MAX_PRESSURE ));
var pressureText = new paper.PointText();
pressureText.content='Max';
pressureText.position.y = pressureAnglePointInitialY - MAX_PRESSURE - 10 ;
dummy = new Path();
dummy.strokeColor = '#000000';
dummy.moveTo(new Point(15 + GRID_X_OFFSET, pressureAnglePointInitialY ));
dummy.add(new Point(360 + GRID_X_OFFSET, pressureAnglePointInitialY ));
var pressureText = new paper.PointText();
pressureText.content='-90';
pressureText.position.y = pressureAnglePointInitialY + 90 ;
dummy = new Path(); // Min
dummy.strokeColor = '#FF0000';
dummy.moveTo(new Point(15 + GRID_X_OFFSET, pressureAnglePointInitialY + MAX_PRESSURE ));
dummy.add(new Point(360 + GRID_X_OFFSET, pressureAnglePointInitialY + MAX_PRESSURE ));
var pressureText = new paper.PointText();
pressureText.content='Min';
pressureText.position.y = pressureAnglePointInitialY + MAX_PRESSURE - 10 + GRID_Y_OFFSET;
dummy = new Path();
dummy.strokeColor = '#000000';
dummy.moveTo(new Point(15 + GRID_X_OFFSET, pressureAnglePointInitialY + 90 ));
dummy.add(new Point(360 + GRID_X_OFFSET, pressureAnglePointInitialY + 90 ));
var pressureText = new paper.PointText();
pressureText.content='Pressure Angle:';
pressureText.position.y = 115 + GRID_Y_OFFSET ;
}
camStartPoint = new Point();
CSR= camStartPoint.clone();
totAngle=0;
origin = new Point(CAM_CENTER_X,CAM_CENTER_Y);
INITIAL_FOLLOWER = new Path(origin, origin); // Dummy coordinates, just for creation;
intersector = new Path(); // Invisible object, used internally to determine local radius of cam profile
intersector.moveTo(new Point(0 + GRID_X_OFFSET, CAM_RADIUS + GRID_Y_OFFSET));
intersector.add(new Point(0 + GRID_X_OFFSET, 0 + GRID_Y_OFFSET));
intersectorRay = new Path(); // Invisibile object, static: a vertical line crossing the cam, used to determine follower contact point
intersectorRay.moveTo(new Point(CAM_CENTER_X + followerOffsetX, CAM_CENTER_Y + followerOffsetY + 100));
intersectorRay.add(new Point(CAM_CENTER_X + followerOffsetX, CAM_CENTER_Y + followerOffsetY - CAM_RADIUS - 100));
intersectorRay.strokeColor = '#000000';
function moveFollower() {
followerOffsetX = rngFollowerOffset.value*1;
follower.segments[0].point.x = FOLLOWER_TOP.x + followerOffsetX;
intersectorRay.segments[0].point.x = FOLLOWER_TOP.x + followerOffsetX;
follower.segments[1].point.x = FOLLOWER_TOP.x + followerOffsetX;
intersectorRay.segments[1].point.x = FOLLOWER_TOP.x + followerOffsetX;
normalVector.bringToFront();
}
function importSVG() {
// Load SVG file containing definition of circular path //
var input, file, fr;
if (typeof window.FileReader !== 'function') {
alert("The file API isn't supported on this browser yet.");
return;
}
input = document.getElementById('SVGfileinput');
if (!input) {
alert("Um, couldn't find the fileinput element.");
}
else if (!input.files) {
alert("This browser doesn't seem to support the `files` property of file inputs.");
}
else if (!input.files[0]) {
}
else {
file = input.files[0];
fr = new FileReader();
fr.onload = processReceivedTextSVG;
fr.readAsText(file);
}
}
function processReceivedTextSVG(e) {
console.log("SVG loaded, importing...",e);
flatPath.clear();
camPath.clear();
camStaticReference.remove();
CSR.remove();
camStartPoint.remove();
for (var i=0; i< flatPathPointMarker.length; i++) {
flatPathPointMarker[i].remove();
}
var lines = e.target.result;
filename.innerHTML = SVGfileinput.value;
SVGfileinput.value="";
fileContentsSVG.value=lines;
fileContents.value = "";
rawPathStart = lines.indexOf("path");
rawPathStart = lines.indexOf("d=", rawPathStart+1) + 3;
rawPathEnd = lines.indexOf('"', rawPathStart+1) - 1;
rawPathLen = rawPathEnd - rawPathStart + 1;
rawPath = lines.substr(rawPathStart, rawPathLen);
try {
camPath = new Path(rawPath);
} catch (e){
alert("Invalid SVG file:" + e);
console.log("Invalid SVG file:" + e);
return -1;
}
camStartPoint = new Path.Circle({
center: startPosition,
radius: 5,
strokeColor: '#000000',
fillColor: '#FFFF00'
});
CSR = camStartPoint.clone()
// Cam first point:
camStart = new Point(startPosition.x, startPosition.y); // Define start position of circular cam path
camPath.moveTo(camStart); // Set first point of cam path to user-defined start position
camPath.position = origin;
camPath.strokeColor = CAM_LINE_COLOR;
camPath.selectedColor = CAM_POINTS_COLOR;
camPath.strokeWidth = CAM_WIDTH;
camPath.fillColor = CAM_FILL_COLOR;
camCreated = true;
camStaticReference = camPath.clone();
camStaticReference.visible=false;
camPath.visible = true;
camType = "SVG";
console.log("Cam SVG loading complete.");
}
function loadFile() {
// Load json file containing definition of flat path //
var input, file, fr;
if (typeof window.FileReader !== 'function') {
alert("The file API isn't supported on this browser yet.");
return;
}
input = document.getElementById('fileinput');
if (!input) {
alert("Um, couldn't find the fileinput element.");
}
else if (!input.files) {
alert("This browser doesn't seem to support the `files` property of file inputs.");
}
else if (!input.files[0]) {
}
else {
file = input.files[0];
try {
fr = new FileReader();
fr.onload = processReceivedText;
fr.readAsText(file);
} catch (e) {
alert("Error loading file");
console.log("Error loading file, " , e);
}
}
}
function processReceivedText(e) {
var lines = e.target.result;
try {
camData = JSON.parse(lines);
fileContents.value = lines;
fileContentsSVG.value = "";
} catch (e){
alert("Invalid JSON file:" + e);
console.log("Invalid JSON file:" + e);
return -1;
}
flatPath.clear();
camPath.clear();
camStaticReference.remove();
CSR.remove();
camStartPoint.remove();
for (var i=0; i< flatPathPointMarker.length; i++) {
flatPathPointMarker[i].remove();
}
camCreated = false;
fileinput.value="";
console.log("Recreating cam from JSON...");
assignCamData();
createCam();
console.log("Done.");
resetRotation();
camPath.bringToFront();
camStartPoint.bringToFront();
camType = "JSON";
}
function saveCam () {
allowRotation = false;
resetRotation();
var filename = "cam.json";
var text = fileContents.value;
var blob = new Blob([text], {type:'text/plain'});
var link = document.createElement("a");
link.download = filename;
link.href = window.URL.createObjectURL(blob);
document.body.appendChild(link);
link.click();
setTimeout(function() {
document.body.removeChild(link);
window.URL.revokeObjectURL(link.href);
}, 100);
}
function update() {
// Security restrictions prevent from reloading a modified file without user intervention, hence "reload"
// is performed on temporary data shown on the page
try {
console.log("JSON REloaded, parsing...");
camData = JSON.parse(fileContents.value);
// fileContents.innerHTML = lines;
console.log("cam data Reloaded: ", camData);
} catch (e){
alert("Invalid JSON file:" + e);
console.log("Invalid JSON file:" + e);
}
console.log("Applying...");
ctx=myCanvas.getContext("2d");
ctx.fillStyle = "#ffffff";
ctx.fillRect(0, 0, myCanvas.width, myCanvas.height);
flatPath.clear();
camPath.clear();
flatPath.clear();
camPath.clear();
camStaticReference.remove();
CSR.remove();
camStartPoint.remove();
for (var i=0; i< flatPathPointMarker.length; i++) {
flatPathPointMarker[i].remove();
}
assignCamData();
createCam();
resetRotation();
camPath.bringToFront();
camPath.visible=true;
camStartPoint.bringToFront();
console.log("Done.");
}
function assignCamData() {
CAM_ROTATION_SPEED = camData.rotSpeed;
CAM_STEPS_WIDTH = camData.stepsWidth;
ROTATION_DIRECTION = camData.rotationDir;
camPath.clear();
camPath.strokeColor = CAM_LINE_COLOR;
camPath.selectedColor = CAM_POINTS_COLOR;
camPath.strokeWidth = CAM_WIDTH;
camPath.fillColor = CAM_FILL_COLOR;
flatPath.clear();
flatPath.strokeColor = CAM_FLATPATH_COLOR;
flatPath.selectedColor = CAM_FLATPATH_POINTS_COLOR;
flatPath.strokeWidth = CAM_FLATPATH_WIDTH;
follower.remove();
follower = INITIAL_FOLLOWER.clone();
follower.segments[0].point = FOLLOWER_TOP;
follower.segments[1].point = FOLLOWER_BOTTOM;
follower.segments[0].point.x = FOLLOWER_TOP.x + followerOffsetX;
follower.segments[1].point.x = FOLLOWER_BOTTOM.x + followerOffsetX;
follower.strokeColor = FOLLOWER_COLOR;
follower.strokeWidth = FOLLOWER_WIDTH;
follower.bringToFront();
normalVector.bringToFront();
drawGrid({x:0, y:0}, {x:360, y:CAM_RADIUS}, 10, 10);
}
function startRotation() {
if (!camCreated) return -1;
allowRotation=true;
}
function stopRotation() {
if (!camCreated) return -1;
allowRotation=false;
}
function rotateCam(angle, type) {
camPath.remove();
camPath = camStaticReference.clone();
camStartPoint.remove();
camStartPoint = CSR.clone();
if (type == "manual") {
totAngle = angle; // Manual --> absolute angle
rngRotation.value = totAngle;
} else {
// anim --> delta angle
totAngle += angle;
if (totAngle > 360) {
totAngle = totAngle - 360;
}
if (totAngle < 0) {
totAngle = totAngle + 360;
}
rngRotation.value = totAngle;
}
lblAngle.innerHTML = rngRotation.value;
camPath.rotate(totAngle, origin);
// Rotate reference lines
for (var i=0; i< radii.length; i++) {
if (radii[i]) {
radii[i].remove();
}
radii[i] = radiiReference[i].clone();
radii[i].strokeColor = "#FF0000";
radii[i].rotate(totAngle, origin);
}
calculatePressureAngle();
indexPressure = 360 - (totAngle - 1);
if (indexPressure < 0) indexPressure = 0;
if (indexPressure >360 ) indexPressure = indexPressure - 360;
try {
pressureAnglePath.segments[indexPressure].point.y = pressureAnglePointInitialY + pressureAngle;
} catch (e) {
console.log("Warning, cannot update pressure angle curve");
}
indexPressure++;
if (indexPressure > 359) {
indexPressure = indexPressure - 360;
}
try {
pressureAnglePath.segments[indexPressure].point.y = pressureAnglePointInitialY + pressureAngle + 1;
} catch (e) {
console.log("Warning 2, cannot update pressure angle curve");
}
drawMarkers();
camStartPoint.rotate(totAngle, origin);
camPath.bringToFront();
camStartPoint.bringToFront();
setCircularGridVisibvility(gridToFront);
camStaticReference.visible=false;
camPath.visible = true;
}
function rotateBySlider() {
rotateCam(rngRotation.value * 1, "manual");
}
function toggleCamSelection() {
if (!camCreated) return -1;
camPath.fullySelected = !camPath.fullySelected;
flatPath.fullySelected = !flatPath.fullySelected;
}
function toggleCircularGrid() {
gridToFront = !gridToFront;
setCircularGridVisibvility(gridToFront)
}
function setCircularGridVisibvility(front){
// Rays:
for (var i=0; i < radii.length; i++) {
if (front) {
radii[i].bringToFront();
} else {
radii[i].sendToBack();
}
}
// Circles:
for (var i=0; i < gridCirclesCount; i++) {
if (front) {
gridCircles[i].bringToFront();
} else {
gridCircles[i].sendToBack();
}
}
}
function onFrame(event) {
///// At each frame rotate cam and update follower position ////
if (!camCreated) return -1;
if (allowRotation === false) return;
// Rotate cam
rotateCam(ROTATION_DIRECTION * CAM_ROTATION_SPEED, "anim");
follower.bringToFront();
normalVector.bringToFront();
camStartPoint.bringToFront();
}
function calculatePressureAngle() {
// Calculate point of contact of follower with cam:
intersections = intersectorRay.getIntersections(camPath);
if (intersections.length>0) {
followerContactPoint = intersections[intersections.length-1].point;
prevX = followerContactPoint.x;
prevY = followerContactPoint.y;
follower.strokeColor = FOLLOWER_COLOR;
contactExists = true;
} else {
followerContactPoint = new Point(prevX, CAM_CENTER_Y + CAM_RADIUS);
follower.strokeColor = '#FFAA00';
contactExists=false;
//return -1;
}
// Update follower position:
follower.segments[1].point.y = followerContactPoint.y;
follower.segments[0].point.y = followerContactPoint.y - FOLLOWER_LENGTH;
if (!contactExists) return -1;
contactOffset = camPath.getOffsetOf(followerContactPoint);
normal = camPath.getNormalAt(contactOffset)*50;
if (normalVector) {
normalVector.clear();
normalVector.remove();
normalVector= new Path({
segments: [followerContactPoint, followerContactPoint + normal]
});
normalVector.strokeColor = NORMAL_COLOR;
normalVector.strokeWidth = NORMAL_WIDTH;
normalVector.bringToFront();
} else {
normalVector[0]= new Point(followerContactPoint, followerContactPoint + normal);
normalVector.bringToFront();
}
pressureAngle = (-90-normal.angle);
if (-pressureAngle * ROTATION_DIRECTION > MAX_PRESSURE) {
spnPressure.style="color:#FF0000;";
follower.strokeColor = '#FF0000';
} else {
spnPressure.style="color:#000000;";
follower.strokeColor = FOLLOWER_COLOR;
}
normalVector.bringToFront();
document.getElementById("spnPressure").innerHTML = pressureAngle.toFixed(0);
}
function resetRotation () {
// debug: aggiustare in modo che non cancelli la camma caricata ////
if (!camCreated) return -1;
rngRotation.value = 0;
rotateCam(0,"manual");
camStartPoint.bringToFront();
}
function drawGrid(topLeft, bottomRight, gridStepX, gridStepY) {
// Draw vertical lines of grid
for (var x=topLeft.x; x < bottomRight.x; x += gridStepX) {
segment = new Path();
segment.strokeColor = '#DDDDDD';
segment.strokeWidth = 1;
segment.moveTo(new Point(x + GRID_X_OFFSET, topLeft.y + GRID_Y_OFFSET));
segment.add(new Point(x + GRID_X_OFFSET , bottomRight.y + GRID_Y_OFFSET));
}
// Draw horizontal lines of grid and circles on cam
for (var y=topLeft.y; y <= bottomRight.y; y += gridStepY) {
segment = new Path();
segment.strokeColor = '#DDDDDD';
segment.strokeWidth = 1;
segment.moveTo(new Point(0 + GRID_X_OFFSET, y + GRID_Y_OFFSET));
segment.add(new Point(bottomRight.x + GRID_X_OFFSET, y + GRID_Y_OFFSET));
gridCircles.push(new Path.Circle({
center: new Point(CAM_CENTER_X, CAM_CENTER_Y),
radius: y,
strokeColor: '#BBBBBB'
}));
gridCirclesCount++;
}
// Draw top and bottom line of grid
segment = new Path();
segment.strokeColor = '#000000';
segment.moveTo(ZERO_ZERO);
segment.add(new Point(bottomRight.x + GRID_X_OFFSET,0 + GRID_Y_OFFSET));
segment = new Path();
segment.strokeColor = '#000000';
segment.moveTo(UPPER_POINT);
segment.add(new Point(bottomRight.x + GRID_X_OFFSET,CAM_RADIUS + GRID_Y_OFFSET));
}
function createCam() {
// if (camCreated) return -1;
camCreated = true;
// Draw flat path of cam on grid:
var start = ZERO_ZERO.clone();
flatPath.moveTo(start);
for (var i=0; i < camData.segments.length; i++) {
flatPathPoint = new Point(camData.segments[i].x + GRID_X_OFFSET, camData.segments[i].y + GRID_Y_OFFSET);
flatPath.add(flatPathPoint);
flatPathPointMarker.push(new Path.Circle({
center: flatPathPoint,
radius: 5,
strokeColor: '#000000',
fillColor: '#FF0000'
}));
}
flatPath.bringToFront();
//// Create the circular profile of the cam starting from the flat profile ////
intersector.position.x = 0 + GRID_X_OFFSET; // Intersector is the vertical line which crosses the flat path, and is used to determine "local cam radius"
intersector.visible=true;
//console.log(intersector);
intersection = flatPath.getIntersections(intersector);
console.log(intersection);
startPosition = new Point(CAM_CENTER_X + (CAM_RADIUS-intersection[0].point.y) + GRID_X_OFFSET, CAM_CENTER_Y ) ; // Start from right, then proceed CCW
startPosition = startPosition.rotate(ANGLE_OFFSET, origin); // Rotate startig point from righ side to top side
camStartPoint = new Path.Circle({
center: startPosition,
radius: 5,
strokeColor: '#000000',
fillColor: '#FFFF00'
});
CSR = camStartPoint.clone()
// Cam first point:
camStart = new Point(startPosition.x, startPosition.y); // Define start position of circular cam path
camPath.moveTo(camStart); // Set first point of cam path to user-defined start position
// Draw cam points:
var vector = origin + startPosition; // Create point w.r.t a base position, i.e. a vector
for (var degr = 0 ; degr <= 360; degr += CIRCULAR_PRECISION) {
intersector.position.x = degr + GRID_X_OFFSET; // "Move" intersector along flat profile
intersection = flatPath.getIntersections(intersector); // Calculate intersection to determine cam local radius
vector.angle = degr + ANGLE_OFFSET; // Rotate the vector at each step/segment of the flat path
vector.length = CAM_RADIUS - intersection[0].point.y + GRID_Y_OFFSET; // Set cam local radius
relativePoint = origin + vector; // Calculate position of point representing local radius of cam
camPath.add(new Point(relativePoint.x, relativePoint.y)); // Add point to circular profile
}
camStaticReference = camPath.clone(); // Reference cam for rotation, constant
drawReferenceRays(vector);
camPath.bringToFront();
camStartPoint.bringToFront();
camStaticReference.visible=false;
camPath.visible = true;
}
function drawReferenceRays(vect) {
vect.length = CAM_RADIUS;
// Draw reference "rays" (one per segment):
for (var index = 0 ; index < flatPath.segments.length; index++) {
vect.angle = flatPath.segments[index].point.x + ANGLE_OFFSET + GRID_X_OFFSET;
relativePoint = origin + vect;
if (radii[index]) {
radii[index].remove();
}
radii.push(new Path(origin, relativePoint));
radiiReference.push(new Path(origin, relativePoint));
radii[index].strokeColor = "#FF0000";
vertLine = new Path(new Point(flatPath.segments[index].point.x ,0 + GRID_Y_OFFSET), new Point(flatPath.segments[index].point.x ,CAM_RADIUS + GRID_X_OFFSET));
if (verticalLines[index]) {
verticalLines[index].remove();
}
verticalLines.push(vertLine);
verticalLines[index].strokeColor = "#FF0000";
verticalLines[index].bringToFront();
}
}
function exportSVG() {
allowRotation = false;
resetRotation();
SVGheader = '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 500 300">\
<g fill="#AAA" stroke="#000000" stroke-width="1">';
SVGfooter = ' </g>\
</svg>';
SVGtext = camPath.exportSVG( { asString: true} );
// Before exporting, create a copy of cam and reposition it:
copy = camPath.clone();
// Define new center for cam
X_MARGIN = 10;
Y_MARGIN = 10;
newCenterX = camPath.bounds.width/2 + X_MARGIN;
newCenterY = camPath.bounds.height/2 + Y_MARGIN;
// Move copy to new position
copy.position = new Point(newCenterX, newCenterY );
// Create SVG export string
SVGtext = SVGheader + copy.exportSVG( { asString: true} ) + SVGfooter;
// Ask user to download the SVG version of the cam:
fileName = "cam.svg"; // Default suggested name
var url = "data:image/svg+xml;utf8," + encodeURIComponent(SVGtext); // Convert SVG string into downloadable format
copy.remove(); // Remove clone of the cam
// Prompt user for downloading:
var link = document.createElement("a");
link.download = fileName;
link.href = url;
link.click();
}
/*
function onMouseDown(event) {
}
*/
/*
function onMouseMove(event) {
}
*/
/*
function onMouseUp(event) {
}
*/
/*function onMouseDrag(event) {
}
*/
drawGrid({x:0, y:0}, {x:360, y:CAM_RADIUS}, 10, 10);
camCreated = false;
assignCamData();
createCam();
fileContents.value = JSON.stringify(camData,null,4);
camPath.bringToFront();
camStartPoint.bringToFront();
createPressureAnglePath();
/////////////
document.getElementById("btnStart").addEventListener("click", startRotation);
document.getElementById("btnStop").addEventListener("click", stopRotation);
document.getElementById("btnReset").addEventListener("click", resetRotation);
document.getElementById("btnShow").addEventListener("click", toggleCamSelection);
document.getElementById("btnUpdate").addEventListener("click", update);
document.getElementById("fileinput").addEventListener("change", loadFile);
document.getElementById("SVGfileinput").addEventListener("change", importSVG);
document.getElementById("btnExportSVG").addEventListener("click", exportSVG);
document.getElementById("btnSave").addEventListener("click", saveCam);
document.getElementById("rngRotation").addEventListener("change", rotateBySlider);
document.getElementById("rngRotation").addEventListener("input", rotateBySlider);
document.getElementById("btnGrid").addEventListener("click", toggleCircularGrid);
document.getElementById("rngFollowerOffset").addEventListener("change", moveFollower);
document.getElementById("rngFollowerOffset").addEventListener("input", moveFollower);
//document.getElementById("btnPressure").addEventListener("click", createPressureAnglePath);
</script>
</head>
<body>
<center><big><big>Javascript Cam/Follower mechanism generator/simulator</big></big><br>
v. 0.1.4 - 18/11/2021<br>
Made with <a href="http://paperjs.org/tutorials/">paper.js</a> by Jumpjack<br>
Source code: <a href="https://github.com/jumpjack/CamFollowerJS">link</a><br>
<table border=1>
<tr><td colspan=2><center>File loaded:<span id="filename" name="filename">none</span></center></td></tr>
<tr>
<td style="vertical-align:top;">
Flat profile (JSON format):<br>
<input type='file' id='fileinput' name='fileinput' accept=".json" style="display:none;">
<input type="button" id="btnLoadJSON" name="btnLoadJSON" value="Load" onclick="document.getElementById('fileinput').click();" />
<button id="btnSave" name="btnSave">Save</button><br>
<br>
Circular profile (SVG format):<br>
<input type='file' id='SVGfileinput' name='SVGfileinput' accept=".svg" style="display:none;">
<input type="button" id="btnLoadSVG" name="btnLoadSVG" value="Load" onclick="document.getElementById('SVGfileinput').click();" />
<button id="btnExportSVG" name="btnExportSVG">Save</button><br>
<br>
Raster to SVG online converter:<a href="https://image.online-convert.com/convert-to-svg">link</a><br>
<br>
<br>
Rotation: <button id="btnStart" name="btnStart">Start</button><button id="btnStop" name="btnStop">Stop</button> <button id="btnReset" name="btnStop">Reset</button><br>
<br>
Please use one of these services to convert SVG file to STL format for 3d printing:<br>
<a href="https://rawgit.com/ryancalme/svg-to-stl/master/SVGtoSTL.html">https://rawgit.com/ryancalme/svg-to-stl/master/SVGtoSTL.html</a><br>
<a href="http://svg2stl.com/">http://svg2stl.com/</a><br>
<br>
Status: <span id="status" name="status">-</span><br>
<br>
Pressure angle: <span id="spnPressure" name="spnPressure" style="color:#000000;">0</pan><br>
</td>
<td>
<canvas id="myCanvas" width=650 height=400 style="background:#EEEEEE;"></canvas><br>
<center>
Follower offset: <input type="range" id="rngFollowerOffset" name="rngFollowerOffset" value = "0" min= "-100" max = "100"><br>
<button id="btnGrid" name="btnGrid">Grid back/front</button>
<button id="btnShow" name="btnShow">Points</button><br>
<div class="slidecontainer">
<input type="range" min="0" max="360" value="5" class="slider" id="rngRotation" name="rngRotation">
</div>
Angle: <span id="lblAngle" name="lblAngle">0</span><br>
</center>
</td>
</tr>
<tr>
<td>
JSON imported data <input type='button' id='btnUpdate' name='btnUpdate' value='Update' ><input type='button' id='btnSmooth' name='btnSmooth' value='Smooth' onclick="camPath.smooth()"><br>
<textarea id="fileContents" name="fileContents" cols=50 rows=30>
</textarea><br>
SVG imported data:<br>
<textarea id="fileContentsSVG" name="fileContentsSVG" cols=50 rows=30>
</textarea><br>
</td>
<td style="vertical-align:top;">
</td>
</tr>
</table>
</body>
</html>