166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis/* Copyright (c) 2013, Brandon Jones, Colin MacKenzie IV. All rights reserved. 266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 366a37686207944273ced825e0e8b6b6375f8c3deJamie GennisRedistribution and use in source and binary forms, with or without modification, 466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennisare permitted provided that the following conditions are met: 566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * Redistributions of source code must retain the above copyright notice, this 766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis list of conditions and the following disclaimer. 866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis * Redistributions in binary form must reproduce the above copyright notice, 966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis this list of conditions and the following disclaimer in the documentation 1066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis and/or other materials provided with the distribution. 1166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 1266a37686207944273ced825e0e8b6b6375f8c3deJamie GennisTHIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 1366a37686207944273ced825e0e8b6b6375f8c3deJamie GennisANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 1466a37686207944273ced825e0e8b6b6375f8c3deJamie GennisWARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 1566a37686207944273ced825e0e8b6b6375f8c3deJamie GennisDISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR 1666a37686207944273ced825e0e8b6b6375f8c3deJamie GennisANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 1766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 1866a37686207944273ced825e0e8b6b6375f8c3deJamie GennisLOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 1966a37686207944273ced825e0e8b6b6375f8c3deJamie GennisANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 2166a37686207944273ced825e0e8b6b6375f8c3deJamie GennisSOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ 2266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 2366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennisdescribe("mat2d", function() { 2466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis var out, matA, matB, identity, result; 2566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 2666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis beforeEach(function() { 2766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis matA = [1, 2, 2866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 3, 4, 2966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 5, 6]; 3066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 3166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis oldA = [1, 2, 3266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 3, 4, 3366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 5, 6]; 3466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 3566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis matB = [7, 8, 3666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 9, 10, 3766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 11, 12]; 3866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 3966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis oldB = [7, 8, 4066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 9, 10, 4166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 11, 12]; 4266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 4366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis out = [0, 0, 4466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 0, 0, 4566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 0, 0]; 4666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 4766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis identity = [1, 0, 4866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 0, 1, 4966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 0, 0]; 5066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis }); 5166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 5266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis describe("create", function() { 5366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis beforeEach(function() { result = mat2d.create(); }); 5466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should return a 6 element array initialized to a 2x3 identity matrix", function() { expect(result).toBeEqualish(identity); }); 5566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis }); 5666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 5766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis describe("clone", function() { 5866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis beforeEach(function() { result = mat2d.clone(matA); }); 5966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should return a 6 element array initialized to the values in matA", function() { expect(result).toBeEqualish(matA); }); 6066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis }); 6166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 6266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis describe("copy", function() { 6366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis beforeEach(function() { result = mat2d.copy(out, matA); }); 6466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should place values into out", function() { expect(out).toBeEqualish(matA); }); 6566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should return out", function() { expect(result).toBe(out); }); 6666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis }); 6766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 6866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis describe("identity", function() { 6966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis beforeEach(function() { result = mat2d.identity(out); }); 7066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should place values into out", function() { expect(result).toBeEqualish(identity); }); 7166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should return out", function() { expect(result).toBe(out); }); 7266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis }); 7366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 7466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis describe("invert", function() { 7566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis describe("with a separate output matrix", function() { 7666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis beforeEach(function() { result = mat2d.invert(out, matA); }); 7766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 7866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should place values into out", function() { expect(out).toBeEqualish([ -2, 1, 1.5, -0.5, 1, -2 ]); }); 7966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should return out", function() { expect(result).toBe(out); }); 8066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should not modify matA", function() { expect(matA).toBeEqualish(oldA); }); 8166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis }); 8266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 8366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis describe("when matA is the output matrix", function() { 8466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis beforeEach(function() { result = mat2d.invert(matA, matA); }); 8566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 8666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should place values into matA", function() { expect(matA).toBeEqualish([ -2, 1, 1.5, -0.5, 1, -2 ]); }); 8766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should return matA", function() { expect(result).toBe(matA); }); 8866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis }); 8966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis }); 9066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 9166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis describe("determinant", function() { 9266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis beforeEach(function() { result = mat2d.determinant(matA); }); 9366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 9466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should return the determinant", function() { expect(result).toEqual(-2); }); 9566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis }); 9666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 9766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis describe("multiply", function() { 9866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should have an alias called 'mul'", function() { expect(mat2d.mul).toEqual(mat2d.multiply); }); 9966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 10066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis describe("with a separate output matrix", function() { 10166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis beforeEach(function() { result = mat2d.multiply(out, matA, matB); }); 10266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 10366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should place values into out", function() { expect(out).toBeEqualish([25, 28, 57, 64, 100, 112]); }); 10466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should return out", function() { expect(result).toBe(out); }); 10566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should not modify matA", function() { expect(matA).toBeEqualish(oldA); }); 10666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should not modify matB", function() { expect(matB).toBeEqualish(oldB); }); 10766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis }); 10866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 10966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis describe("when matA is the output matrix", function() { 11066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis beforeEach(function() { result = mat2d.multiply(matA, matA, matB); }); 11166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 11266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should place values into matA", function() { expect(matA).toBeEqualish([25, 28, 57, 64, 100, 112]); }); 11366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should return matA", function() { expect(result).toBe(matA); }); 11466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should not modify matB", function() { expect(matB).toBeEqualish(oldB); }); 11566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis }); 11666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 11766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis describe("when matB is the output matrix", function() { 11866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis beforeEach(function() { result = mat2d.multiply(matB, matA, matB); }); 11966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 12066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should place values into matB", function() { expect(matB).toBeEqualish([25, 28, 57, 64, 100, 112]); }); 12166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should return matB", function() { expect(result).toBe(matB); }); 12266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should not modify matA", function() { expect(matA).toBeEqualish(oldA); }); 12366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis }); 12466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis }); 12566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 12666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis describe("rotate", function() { 12766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis describe("with a separate output matrix", function() { 12866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis beforeEach(function() { result = mat2d.rotate(out, matA, Math.PI * 0.5); }); 12966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 13066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should place values into out", function() { expect(out).toBeEqualish([2, -1, 4, -3, 6, -5]); }); 13166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should return out", function() { expect(result).toBe(out); }); 13266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should not modify matA", function() { expect(matA).toBeEqualish(oldA); }); 13366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis }); 13466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 13566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis describe("when matA is the output matrix", function() { 13666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis beforeEach(function() { result = mat2d.rotate(matA, matA, Math.PI * 0.5); }); 13766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 13866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should place values into matA", function() { expect(matA).toBeEqualish([2, -1, 4, -3, 6, -5]); }); 13966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should return matA", function() { expect(result).toBe(matA); }); 14066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis }); 14166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis }); 14266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 14366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis describe("scale", function() { 14466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis var vecA; 14566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis beforeEach(function() { vecA = [2, 3]; }); 14666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 14766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis describe("with a separate output matrix", function() { 14866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis beforeEach(function() { result = mat2d.scale(out, matA, vecA); }); 14966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 15066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should place values into out", function() { expect(out).toBeEqualish([2, 6, 6, 12, 10, 18]); }); 15166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should return out", function() { expect(result).toBe(out); }); 15266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should not modify matA", function() { expect(matA).toBeEqualish(oldA); }); 15366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis }); 15466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 15566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis describe("when matA is the output matrix", function() { 15666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis beforeEach(function() { result = mat2d.scale(matA, matA, vecA); }); 15766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 15866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should place values into matA", function() { expect(matA).toBeEqualish([2, 6, 6, 12, 10, 18]); }); 15966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should return matA", function() { expect(result).toBe(matA); }); 16066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis }); 16166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis }); 16266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 16366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis describe("translate", function() { 16466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis var vecA; 16566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis beforeEach(function() { vecA = [2, 3]; }); 16666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 16766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis describe("with a separate output matrix", function() { 16866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis beforeEach(function() { result = mat2d.translate(out, matA, vecA); }); 16966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 17066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should place values into out", function() { expect(out).toBeEqualish([1, 2, 3, 4, 7, 9]); }); 17166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should return out", function() { expect(result).toBe(out); }); 17266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should not modify matA", function() { expect(matA).toBeEqualish(oldA); }); 17366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis }); 17466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 17566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis describe("when matA is the output matrix", function() { 17666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis beforeEach(function() { result = mat2d.translate(matA, matA, vecA); }); 17766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 17866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should place values into matA", function() { expect(matA).toBeEqualish([1, 2, 3, 4, 7, 9]); }); 17966a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should return matA", function() { expect(result).toBe(matA); }); 18066a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis }); 18166a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis }); 18266a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 18366a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis describe("str", function() { 18466a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis beforeEach(function() { result = mat2d.str(matA); }); 18566a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis 18666a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis it("should return a string representation of the matrix", function() { expect(result).toEqual("mat2d(1, 2, 3, 4, 5, 6)"); }); 18766a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis }); 18866a37686207944273ced825e0e8b6b6375f8c3deJamie Gennis});