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Title	Give Winston a Beard!
ID	5211412870725632
Created	11 years ago, 1399959943370
Updated	11 years ago, 1399959943495
Code	// This program lets the user move the mouse to draw Winston's beard - // but ONLY his beard, nothing else. // It does this by figuring out a polygon that describes his beard, // and using a point-in-poly algorithm to detect if the point is in the poly. // A polygon that describes the space of Winston's beard var beardPolygon = [ [ 51, 226], [ 125, 225], [ 180, 308], [ 258, 318], [ 320, 286], [ 338, 238], [ 353, 248], [ 349, 311], [ 286, 374], [ 161, 367], [ 70, 310], [ 53, 227] ]; // Function to determine whether a given point (array of two coordinates) // is inside a polygon (multi-dimensional array of multiple coordinates) // From: https://github.com/substack/point-in-polygon/blob/master/index.js var isPointInPoly = function (point, vs) { // ray-casting algorithm based on // http://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/pnpoly.html var x = point[0], y = point[1]; var inside = false; for (var i = 0, j = vs.length - 1; i < vs.length; j = i++) { var xi = vs[i][0], yi = vs[i][1]; var xj = vs[j][0], yj = vs[j][1]; var intersect = ((yi > y) !== (yj > y)) && (x < (xj - xi) * (y - yi) / (yj - yi) + xi); if (intersect) { inside = !inside; } } return inside; }; // Function that draws polygons (multi-dimensional arrays of coordinates), // useful for debugging and visualizing the beard polygon if desired var drawPoly = function(poly) { beginShape(); for (var i = 0; i < poly.length; i++) { vertex(poly[i][0], poly[i][1]); } endShape(); }; // Draw Winston's face var drawWinston = function() { noStroke(); // face fill(255, 255, 0); ellipse(202, 208, 300, 300); // eyes fill(46, 46, 41); ellipse(157, 151, 40, 40); ellipse(304, 142, 40, 40); // mouth fill(252, 65, 65); ellipse(257, 240, 120, 136); }; /* // This was used to come up with the beardPolygon array. Feel free to re-use to come up with your own beard! var polyPoints = []; mouseClicked = function() { polyPoints.push([mouseX, mouseY]); println("[ " + mouseX + ", " + mouseY + "],"); stroke(0, 0, 0); point(mouseX, mouseY); if (polyPoints.length >= 2) { line(polyPoints[polyPoints.length-2][0], polyPoints[polyPoints.length-2][1], polyPoints[polyPoints.length-1][0], polyPoints[polyPoints.length-1][1]); } };*/ // When the mouse moves, draw a point only if its inside the beard polygon mouseMoved = function() { if (isPointInPoly([mouseX, mouseY], beardPolygon)) { strokeWeight(5); stroke(0, 0, 0); point(mouseX, mouseY); } }; drawWinston();
Folds
Fork	false
Key	ag5zfmtoYW4tYWNhZGVteXIXCxIKU2NyYXRjaHBhZBiAgMDnifigCQw
Votes	247
Spin-Offs	57
Type	PJS
Width	400
Height	400
User Flagged	false
Origin Scratchpad	null
Hidden From Hotlist	false
Restricted Posting	false
By Child	false
Author Nick	pamela ❤
Author Name	pamela
Author ID	kaid_481802608512872365097525
Author Profile Access	PUBLIC

Archive Data

Added	6 months ago, 1739377297483
Updated	6 months ago, 1739377303005
Source Deleted	unknown