UNPKG

@jscad/modeling

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Constructive Solid Geometry (CSG) Library for JSCAD

openjscad.xyz

jscad/OpenJSCAD.org

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const test = require('ava') const { comparePolygonsAsPoints } = require('../../../test/helpers') const { TAU } = require('../../maths/constants') const { geom3 } = require('../../geometries') const { cuboid } = require('../../primitives') const { generalize } = require('./index') test('generalize: generalize of a geom3 produces an expected geom3', (t) => { const geometry1 = cuboid({ size: [TAU / 2, TAU / 4, TAU] }) // apply no modifications let result = generalize({}, geometry1) let pts = geom3.toPoints(result) let exp = [ [[-1.5707963267948966, -0.7853981633974483, -3.141592653589793], [-1.5707963267948966, -0.7853981633974483, 3.141592653589793], [-1.5707963267948966, 0.7853981633974483, 3.141592653589793], [-1.5707963267948966, 0.7853981633974483, -3.141592653589793]], [[1.5707963267948966, -0.7853981633974483, -3.141592653589793], [1.5707963267948966, 0.7853981633974483, -3.141592653589793], [1.5707963267948966, 0.7853981633974483, 3.141592653589793], [1.5707963267948966, -0.7853981633974483, 3.141592653589793]], [[-1.5707963267948966, -0.7853981633974483, -3.141592653589793], [1.5707963267948966, -0.7853981633974483, -3.141592653589793], [1.5707963267948966, -0.7853981633974483, 3.141592653589793], [-1.5707963267948966, -0.7853981633974483, 3.141592653589793]], [[-1.5707963267948966, 0.7853981633974483, -3.141592653589793], [-1.5707963267948966, 0.7853981633974483, 3.141592653589793], [1.5707963267948966, 0.7853981633974483, 3.141592653589793], [1.5707963267948966, 0.7853981633974483, -3.141592653589793]], [[-1.5707963267948966, -0.7853981633974483, -3.141592653589793], [-1.5707963267948966, 0.7853981633974483, -3.141592653589793], [1.5707963267948966, 0.7853981633974483, -3.141592653589793], [1.5707963267948966, -0.7853981633974483, -3.141592653589793]], [[-1.5707963267948966, -0.7853981633974483, 3.141592653589793], [1.5707963267948966, -0.7853981633974483, 3.141592653589793], [1.5707963267948966, 0.7853981633974483, 3.141592653589793], [-1.5707963267948966, 0.7853981633974483, 3.141592653589793]] ] t.notThrows(() => geom3.validate(result)) t.true(comparePolygonsAsPoints(pts, exp)) // apply snap only result = generalize({ snap: true }, geometry1) pts = geom3.toPoints(result) exp = [ [[-1.5707910908071407, -0.7854138713607164, -3.1415821816142815], [-1.5707910908071407, -0.7854138713607164, 3.1415821816142815], [-1.5707910908071407, 0.7854138713607164, 3.1415821816142815], [-1.5707910908071407, 0.7854138713607164, -3.1415821816142815]], [[1.5707910908071407, -0.7854138713607164, -3.1415821816142815], [1.5707910908071407, 0.7854138713607164, -3.1415821816142815], [1.5707910908071407, 0.7854138713607164, 3.1415821816142815], [1.5707910908071407, -0.7854138713607164, 3.1415821816142815]], [[-1.5707910908071407, -0.7854138713607164, -3.1415821816142815], [1.5707910908071407, -0.7854138713607164, -3.1415821816142815], [1.5707910908071407, -0.7854138713607164, 3.1415821816142815], [-1.5707910908071407, -0.7854138713607164, 3.1415821816142815]], [[-1.5707910908071407, 0.7854138713607164, -3.1415821816142815], [-1.5707910908071407, 0.7854138713607164, 3.1415821816142815], [1.5707910908071407, 0.7854138713607164, 3.1415821816142815], [1.5707910908071407, 0.7854138713607164, -3.1415821816142815]], [[-1.5707910908071407, -0.7854138713607164, -3.1415821816142815], [-1.5707910908071407, 0.7854138713607164, -3.1415821816142815], [1.5707910908071407, 0.7854138713607164, -3.1415821816142815], [1.5707910908071407, -0.7854138713607164, -3.1415821816142815]], [[-1.5707910908071407, -0.7854138713607164, 3.1415821816142815], [1.5707910908071407, -0.7854138713607164, 3.1415821816142815], [1.5707910908071407, 0.7854138713607164, 3.1415821816142815], [-1.5707910908071407, 0.7854138713607164, 3.1415821816142815]] ] t.notThrows(() => geom3.validate(result)) t.true(comparePolygonsAsPoints(pts, exp)) // apply triangulate only result = generalize({ triangulate: true }, geometry1) pts = geom3.toPoints(result) exp = [ [[-1.5707963267948966, -0.7853981633974483, -3.141592653589793], [-1.5707963267948966, -0.7853981633974483, 3.141592653589793], [-1.5707963267948966, 0.7853981633974483, 3.141592653589793]], [[-1.5707963267948966, -0.7853981633974483, -3.141592653589793], [-1.5707963267948966, 0.7853981633974483, 3.141592653589793], [-1.5707963267948966, 0.7853981633974483, -3.141592653589793]], [[1.5707963267948966, -0.7853981633974483, -3.141592653589793], [1.5707963267948966, 0.7853981633974483, -3.141592653589793], [1.5707963267948966, 0.7853981633974483, 3.141592653589793]], [[1.5707963267948966, -0.7853981633974483, -3.141592653589793], [1.5707963267948966, 0.7853981633974483, 3.141592653589793], [1.5707963267948966, -0.7853981633974483, 3.141592653589793]], [[-1.5707963267948966, -0.7853981633974483, -3.141592653589793], [1.5707963267948966, -0.7853981633974483, -3.141592653589793], [1.5707963267948966, -0.7853981633974483, 3.141592653589793]], [[-1.5707963267948966, -0.7853981633974483, -3.141592653589793], [1.5707963267948966, -0.7853981633974483, 3.141592653589793], [-1.5707963267948966, -0.7853981633974483, 3.141592653589793]], [[-1.5707963267948966, 0.7853981633974483, -3.141592653589793], [-1.5707963267948966, 0.7853981633974483, 3.141592653589793], [1.5707963267948966, 0.7853981633974483, 3.141592653589793]], [[-1.5707963267948966, 0.7853981633974483, -3.141592653589793], [1.5707963267948966, 0.7853981633974483, 3.141592653589793], [1.5707963267948966, 0.7853981633974483, -3.141592653589793]], [[-1.5707963267948966, -0.7853981633974483, -3.141592653589793], [-1.5707963267948966, 0.7853981633974483, -3.141592653589793], [1.5707963267948966, 0.7853981633974483, -3.141592653589793]], [[-1.5707963267948966, -0.7853981633974483, -3.141592653589793], [1.5707963267948966, 0.7853981633974483, -3.141592653589793], [1.5707963267948966, -0.7853981633974483, -3.141592653589793]], [[-1.5707963267948966, -0.7853981633974483, 3.141592653589793], [1.5707963267948966, -0.7853981633974483, 3.141592653589793], [1.5707963267948966, 0.7853981633974483, 3.141592653589793]], [[-1.5707963267948966, -0.7853981633974483, 3.141592653589793], [1.5707963267948966, 0.7853981633974483, 3.141592653589793], [-1.5707963267948966, 0.7853981633974483, 3.141592653589793]] ] t.notThrows(() => geom3.validate(result)) t.true(comparePolygonsAsPoints(pts, exp)) const geometry2 = result // save the triangles for another test // apply simplify only (triangles => quads) result = generalize({ simplify: true }, geometry2) pts = geom3.toPoints(result) exp = [ [[-1.5707963267948966, -0.7853981633974483, -3.141592653589793], [-1.5707963267948966, -0.7853981633974483, 3.141592653589793], [-1.5707963267948966, 0.7853981633974483, 3.141592653589793], [-1.5707963267948966, 0.7853981633974483, -3.141592653589793]], [[1.5707963267948966, -0.7853981633974483, -3.141592653589793], [1.5707963267948966, 0.7853981633974483, -3.141592653589793], [1.5707963267948966, 0.7853981633974483, 3.141592653589793], [1.5707963267948966, -0.7853981633974483, 3.141592653589793]], [[-1.5707963267948966, -0.7853981633974483, -3.141592653589793], [1.5707963267948966, -0.7853981633974483, -3.141592653589793], [1.5707963267948966, -0.7853981633974483, 3.141592653589793], [-1.5707963267948966, -0.7853981633974483, 3.141592653589793]], [[-1.5707963267948966, 0.7853981633974483, -3.141592653589793], [-1.5707963267948966, 0.7853981633974483, 3.141592653589793], [1.5707963267948966, 0.7853981633974483, 3.141592653589793], [1.5707963267948966, 0.7853981633974483, -3.141592653589793]], [[-1.5707963267948966, -0.7853981633974483, -3.141592653589793], [-1.5707963267948966, 0.7853981633974483, -3.141592653589793], [1.5707963267948966, 0.7853981633974483, -3.141592653589793], [1.5707963267948966, -0.7853981633974483, -3.141592653589793]], [[-1.5707963267948966, -0.7853981633974483, 3.141592653589793], [1.5707963267948966, -0.7853981633974483, 3.141592653589793], [1.5707963267948966, 0.7853981633974483, 3.141592653589793], [-1.5707963267948966, 0.7853981633974483, 3.141592653589793]] ] t.notThrows(() => geom3.validate(result)) t.true(comparePolygonsAsPoints(pts, exp)) }) test('generalize: generalize of a geom3 with T junctions produces an expected geom3', (t) => { const geometry1 = geom3.fromPoints( [ [[-1, -1, -1], [-1, -1, 1], [-1, 1, 1], [-1, 1, -1]], [[1, -1, -1], [1, 1, -1], [1, 1, 1], [1, -1, 1]], [[-1, -1, -1], [1, -1, -1], [1, -1, 1], [-1, -1, 1]], [[-1, 1, -1], [-1, 1, 1], [1, 1, 1], [1, 1, -1]], [[-1, -1, -1], [-1, 1, -1], [1, 1, -1], [1, -1, -1]], // T junctions [[-1, -1, 1], [0, -1, 1], [0, 0, 1]], [[-1, 0, 1], [-1, -1, 1], [0, 0, 1]], [[0, -1, 1], [1, -1, 1], [0, 0, 1]], [[1, -1, 1], [1, 0, 1], [0, 0, 1]], [[1, 0, 1], [1, 1, 1], [0, 0, 1]], [[1, 1, 1], [0, 1, 1], [0, 0, 1]], [[0, 1, 1], [-1, 1, 1], [0, 0, 1]], [[-1, 1, 1], [-1, 0, 1], [0, 0, 1]] ] ) const result = generalize({ snap: true, triangulate: true }, geometry1) const pts = geom3.toPoints(result) const exp = [ [[-1, 0, 0.2], [-1, -1, -1], [-1, -1, 1]], [[-1, 0, 0.2], [-1, -1, 1], [-1, 0, 1]], [[-1, 0, 0.2], [-1, 0, 1], [-1, 1, 1]], [[-1, 0, 0.2], [-1, 1, 1], [-1, 1, -1]], [[-1, 0, 0.2], [-1, 1, -1], [-1, -1, -1]], [[1, 0, 0.2], [1, -1, -1], [1, 1, -1]], [[1, 0, 0.2], [1, 1, -1], [1, 1, 1]], [[1, 0, 0.2], [1, 1, 1], [1, 0, 1]], [[1, 0, 0.2], [1, 0, 1], [1, -1, 1]], [[1, 0, 0.2], [1, -1, 1], [1, -1, -1]], [[0, -1, 0.2], [-1, -1, -1], [1, -1, -1]], [[0, -1, 0.2], [1, -1, -1], [1, -1, 1]], [[0, -1, 0.2], [1, -1, 1], [0, -1, 1]], [[0, -1, 0.2], [0, -1, 1], [-1, -1, 1]], [[0, -1, 0.2], [-1, -1, 1], [-1, -1, -1]], [[0, 1, 0.2], [-1, 1, -1], [-1, 1, 1]], [[0, 1, 0.2], [-1, 1, 1], [0, 1, 1]], [[0, 1, 0.2], [0, 1, 1], [1, 1, 1]], [[0, 1, 0.2], [1, 1, 1], [1, 1, -1]], [[0, 1, 0.2], [1, 1, -1], [-1, 1, -1]], [[-1, -1, -1], [-1, 1, -1], [1, 1, -1]], [[-1, -1, -1], [1, 1, -1], [1, -1, -1]], [[-1, -1, 1], [0, -1, 1], [0, 0, 1]], [[-1, 0, 1], [-1, -1, 1], [0, 0, 1]], [[0, -1, 1], [1, -1, 1], [0, 0, 1]], [[1, -1, 1], [1, 0, 1], [0, 0, 1]], [[1, 0, 1], [1, 1, 1], [0, 0, 1]], [[1, 1, 1], [0, 1, 1], [0, 0, 1]], [[0, 1, 1], [-1, 1, 1], [0, 0, 1]], [[-1, 1, 1], [-1, 0, 1], [0, 0, 1]] ] t.notThrows(() => geom3.validate(result)) t.true(comparePolygonsAsPoints(pts, exp)) })