lathe/examples/js/booleanexample.js

A discrete solid modeller using BSPs

'use strict';

define([
    'lib/bench',
    'lib/conv',
    'lib/bsp',
    'examples/js/viewport',
    'examples/js/trackball',
  ], function(Bench, Conv, BSP, Viewport, Trackball) {

  var Example = function(t1, t2, shpClass) {

    var exampleContainer = document.createElement('div');
    exampleContainer.classList.add('example');
    var beforeContainer = document.createElement('div');
    var bspAContainer = document.createElement('div');
    beforeContainer.classList.add('viewport');
    bspAContainer.classList.add('viewport');
    document.body.appendChild(exampleContainer);
    exampleContainer.appendChild(beforeContainer);
    exampleContainer.appendChild(bspAContainer);
    var beforeViewport = new Viewport(beforeContainer);
    var bspAViewport  = new Viewport(bspAContainer);
    new Trackball([beforeViewport, bspAViewport]);

    beforeViewport.addBRep(Conv.bspToBrep(t1), 0x00ff00);
    beforeViewport.addBRep(Conv.bspToBrep(t2), 0x0000ff);

    var calculate = function(booleanFn) {
      bspAViewport.clear();
      var merged = Bench.time(function() { 
        return booleanFn();
      }, 'boolean');
      var brep = Bench.time(function() { 
        return Conv.bspToBrep(merged); 
      }, 'brep');
      bspAViewport.addBRep(brep, 0x00ffff);
    }

    var controls = $('<div class="controls"></div>')
    var unionAB = $('<input type="button" value="A &cup; B">');
    var unionBA = $('<input type="button" value="B &cup; A">');
    var intersectAB = $('<input type="button" value="A &cap; B">');
    var intersectBA = $('<input type="button" value="B &cap; A">');
    var diffAB = $('<input type="button" value="A - B">');
    var diffBA = $('<input type="button" value="B - A">');
    $(bspAContainer).append(controls);
    $(controls).append(unionAB);
    $(controls).append(unionBA);
    $(controls).append(intersectAB);
    $(controls).append(intersectBA);
    $(controls).append(diffAB);
    $(controls).append(diffBA);

    unionAB.click(function() {
      calculate(function() {
        return BSP.union(t1, t2, shpClass);
      });
    });

    unionBA.click(function() {
      calculate(function() {
        return BSP.union(t2, t1, shpClass);
      });
    });

    intersectAB.click(function() {
      calculate(function() {
        return BSP.intersection(t1, t2, shpClass);
      });
    });

    intersectBA.click(function() {
      calculate(function() {
        return BSP.intersection(t2, t1, shpClass);
      });
    });

    diffAB.click(function() {
      calculate(function() {
        return BSP.difference(t1, t2, shpClass);
      });
    });
    
    diffBA.click(function() {
      calculate(function() {
        return BSP.difference(t2, t1, shpClass);
      });
    });

  }

  return Example;

});