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64 lines
4.6 KiB
JavaScript
64 lines
4.6 KiB
JavaScript
var assert = require('assert');
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var error = require('../../../lib/error/index');
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var math = require('../../../index');
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describe('intersect', function() {
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it('should calculate the intersection point of two 2D lines', function() {
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assert.deepEqual(math.intersect([0, 0], [10, 10], [10, 0], [0, 10]), [5, 5]);
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assert.deepEqual(math.intersect(math.matrix([0, 0]), [10, 10], math.matrix([10, 0]), math.matrix([0, 10])), math.matrix([5, 5]));
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assert.deepEqual(math.intersect(math.matrix([0, 0]), math.matrix([10, 10]), math.matrix([10, 0]), math.matrix([0, 10])), math.matrix([5, 5]));
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assert.deepEqual(math.intersect([300, 90], [400, 97], [300, 130], [400, 125]), [633.3333333333334, 113.33333333333334]);
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});
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it('should calculate the intersection point of two 3D lines', function() {
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assert.deepEqual(math.intersect([0, 0, 0], [10, 10, 0], [10, 0, 0], [0, 10, 0]), [5, 5, 0]);
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assert.deepEqual(math.intersect(math.matrix([0, 0, 0]), [10, 10, 0], [10, 0, 0], math.matrix([0, 10, 0])), math.matrix([5, 5, 0]));
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assert.deepEqual(math.intersect(math.matrix([0, 0, 0]), math.matrix([10, 10, 0]), math.matrix([10, 0, 0]), math.matrix([0, 10, 0])), math.matrix([5, 5, 0]));
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});
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it('should calculate the intersection point of a line and a plane', function() {
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assert.deepEqual(math.intersect([1, 0, 1], [4, -2, 2], [1, 1, 1, 6]), [7, -4, 3]);
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assert.deepEqual(math.intersect(math.matrix([1, 0, 1]), [4, -2, 2], math.matrix([1, 1, 1, 6])), math.matrix([7, -4, 3]));
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assert.deepEqual(math.intersect(math.matrix([1, 0, 1]), math.matrix([4, -2, 2]), math.matrix([1, 1, 1, 6])), math.matrix([7, -4, 3]));
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});
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it('should calculate the intersection point of a line and a plane with plane coefficients other than (1, 1, 1)', function() {
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assert.deepEqual(math.intersect([0, 30, 0], [0, 21, 0], [0, 9, 0, 0]), [0, 0, 0]);
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assert.deepEqual(math.intersect(math.matrix([0, 30, 0]), [0, 21, 0], math.matrix([0, 9, 0, 0])), math.matrix([0, 0, 0]));
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assert.deepEqual(math.intersect(math.matrix([0, 30, 0]), math.matrix([0, 21, 0]), math.matrix([0, 9, 0, 0])), math.matrix([0, 0, 0]));
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});
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it('should return null if the points do not intersect', function() {
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assert.deepEqual(math.intersect([0, 1, 0], [0, 0, 0], [1, 1, 0], [1, 0, 0]), null);
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assert.deepEqual(math.intersect([0, 1], [0, 0], [1, 1], [1, 0]), null);
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});
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it('should throw an error when number of arguments are other than 3 or 4', function() {
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assert.throws(function () {math.intersect([2, 0, 1], [1, 1, 1, 6])}, /TypeError: Too few arguments in function intersect/);
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assert.throws(function () {math.intersect([2, 0, 1], [1, 1, 6], [2, 0, 1], [1, 1, 6], [0, 8, 1])}, /TypeError: Too many arguments in function intersect/);
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});
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it('should throw an error for incompatible parameter types', function() {
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assert.throws(function () {math.intersect(2, 3, 6)}, /TypeError: Unexpected type of argument in function intersect/);
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assert.throws(function () {math.intersect([2, 0, 1], [1, 1, 1], [5, 1, 10])}, /TypeError: Array with 4 numbers expected as third argument/);
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assert.throws(function () {math.intersect([], [], [], [])}, /TypeError: Arrays with two or thee dimensional points expected/);
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assert.throws(function () {math.intersect([2, 8, 9], 3, 6)}, /TypeError: Unexpected type of argument in function intersect/);
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assert.throws(function () {math.intersect('a', 'b', 'c', 'd')}, /TypeError: Unexpected type of argument in function intersect/);
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});
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it('should calculate the intersection point if coordinates are bignumbers', function() {
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var bigmath = math.create({number: 'BigNumber', precision: 32});
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var bigintersect = bigmath.intersect;
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var bignumber = bigmath.bignumber;
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assert.deepEqual(bigmath.eval('intersect([0, 0], [10, 10], [10, 0], [0, 10])'), math.matrix([bignumber(5), bignumber(5)]));
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assert.deepEqual(bigintersect([bignumber(0), bignumber(0)], [bignumber(10), bignumber(10)], [bignumber(10), bignumber(0)], [bignumber(0), bignumber(10)]),
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[bignumber(5), bignumber(5)]);
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assert.deepEqual(bigintersect([bignumber(0), 0], [10, bignumber(10)], [10, bignumber(0)], [0, bignumber(10)]), [bignumber(5), bignumber(5)]);
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assert.deepEqual(bigintersect([bignumber(0), bignumber(0), bignumber(0)], [bignumber(10), bignumber(10), bignumber(0)], [bignumber(10), bignumber(0), bignumber(0)], [bignumber(0), bignumber(10), bignumber(0)]),
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[bignumber(5), bignumber(5), bignumber(0)]);
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assert.deepEqual(bigintersect([bignumber(1), bignumber(0), bignumber(1)], [bignumber(4), bignumber(-2), bignumber(2)], [bignumber(1), bignumber(1), bignumber(1), bignumber(6)]),
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[bignumber(7), bignumber(-4), bignumber(3)]);
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});
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});
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