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Title	Tearable Cloth
ID	4990470665666560
Created	9 years ago, 1445094197497
Updated	9 years ago, 1445199859128
Code	/* Copyright (c) 2013 dissimulate at Codepen Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Code adapted from CodePen to work on Khan Academy by Jacob 2015 / var physics_accuracy = 3, mouse_influence = 20, mouse_cut = 5, gravity = 1750, cloth_height = 25, cloth_width = 25, start_y = 20, spacing = 7, tear_distance = 60; var boundsx, boundsy; var Constraint = function (p1, p2) { this.p1 = p1; this.p2 = p2; this.length = spacing; }; var Point = function (x, y) { this.x = x; this.y = y; this.px = x; this.py = y; this.vx = 0; this.vy = 0; this.pin_x = null; this.pin_y = null; this.constraints = []; }; Point.prototype.update = function (delta) { if (mouseIsPressed) { var diff_x = this.x - mouseX, diff_y = this.y - mouseY, dist = Math.sqrt(diff_x diff_x + diff_y * diff_y); if (mouseButton === LEFT) { if (dist < mouse_influence) { this.px = this.x - (mouseX - pmouseX) * 1.8; this.py = this.y - (mouseY - pmouseY) * 1.8; } } else if (dist < mouse_cut){ this.constraints = []; } } this.add_force(0, gravity); delta = delta; var nx = this.x + ((this.x - this.px) 0.99) + ((this.vx / 2) * delta); var ny = this.y + ((this.y - this.py) * 0.99) + ((this.vy / 2) * delta); this.px = this.x; this.py = this.y; this.x = nx; this.y = ny; this.vy = this.vx = 0; this.y=constrain(this.y, -400, 320); this.x = constrain(this.x, 10, 390); }; Point.prototype.draw = function () { if (!this.constraints.length){ return; } var i = this.constraints.length; while (i--){ this.constraints[i].draw(); } }; Point.prototype.resolve_constraints = function () { if (this.pin_x !== null && this.pin_y !== null) { this.x = this.pin_x; this.y = this.pin_y; return; } var i = this.constraints.length; while (i--){ this.constraints[i].resolve(); } }; Point.prototype.attach = function (point) { this.constraints.push( new Constraint(this, point) ); }; Point.prototype.remove_constraint = function (constraint) { this.constraints.splice(this.constraints.indexOf(constraint), 1); }; Point.prototype.add_force = function (x, y) { this.vx += x; this.vy += y; }; Point.prototype.pin = function (pinx, piny) { this.pin_x = pinx; this.pin_y = piny; }; Constraint.prototype.resolve = function () { var diff_x = this.p1.x - this.p2.x, diff_y = this.p1.y - this.p2.y, dist = Math.sqrt(diff_x * diff_x + diff_y * diff_y), diff = (this.length - dist) / dist; if (dist > tear_distance){ this.p1.remove_constraint(this); } var px = diff_x * diff * 0.5; var py = diff_y * diff * 0.5; this.p1.x += px; this.p1.y += py; this.p2.x -= px; this.p2.y -= py; }; Constraint.prototype.draw = function () { line(this.p1.x, this.p1.y, this.p2.x, this.p2.y); }; var p = []; /* for(var i=0;i<35;i++){ p.push( new Point(200-i5, i10) ); if(i===0){ p[i].pin(200, 0); }else{ p[i].attach(p[i-1]); } }/ var start_x = width / 2 - cloth_width spacing / 2; for (var y = 0; y <= cloth_height; y++) { for (var x = 0; x <= cloth_width; x++) { var P = new Point(start_x + x * spacing, start_y + y * spacing); if(x !== 0){ P.attach(p[p.length - 1]); } if(y === 0){ P.pin(P.x, P.y); } else if(y !== 0){ P.attach(p[x + (y - 1) * (cloth_width + 1)]); } p.push(P); } } strokeWeight(0.5); println("Note, this code is NOT mine. I simply adapted it from CodePen:\nhttp://codepen.io/dissimulate/pen/KrAwx"); fill(227, 227, 227); var draw = function() { background(255, 255, 255); noStroke(); fill(227); quad(0,330,20,310,380,310,400,330); fill(240); quad(0,0,20,0,20,310,0,330); fill(210); quad(400,0,380,0,380,310,400,330); fill(148, 148, 148); text(" Frame-Rate: "+floor(this.__frameRate),5,15); text("- Move the cloth\n with your mouse\n\n- Right click and\n drag to cut the\n cloth\n",5,30); stroke(0, 0, 0); var i = physics_accuracy; while (i--) { var k = p.length; while (k--){ p[k].resolve_constraints(); } } i = p.length; while (i--){ p[i].update(0.016); } for(var i in p){ p[i].draw(); } fill(50); text("© 2013 dissimulate at Codepen",221,326); };
Folds
Fork	false
Key	ag5zfmtoYW4tYWNhZGVteXIXCxIKU2NyYXRjaHBhZBiAgKj659nuCAw
Votes	364
Spin-Offs	45
Type	PJS
Width	400
Height	400
User Flagged	false
Origin Scratchpad	null
Hidden From Hotlist	false
Restricted Posting	false
By Child	false
Author Nick	Jacob
Author Name	Jacob124
Author ID	kaid_196917702627746948456106
Author Profile Access	PUBLIC

Archive Data

Added	6 months ago, 1739372508132
Updated	4 months ago, 1744828640788
Source Deleted	unknown