| /* Copyright (c) 2013, Brandon Jones, Colin MacKenzie IV. All rights reserved. |
| |
| Redistribution and use in source and binary forms, with or without modification, |
| are permitted provided that the following conditions are met: |
| |
| * Redistributions of source code must retain the above copyright notice, this |
| list of conditions and the following disclaimer. |
| * Redistributions in binary form must reproduce the above copyright notice, |
| this list of conditions and the following disclaimer in the documentation |
| and/or other materials provided with the distribution. |
| |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
| ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR |
| ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ |
| |
| describe("mat2", function() { |
| var out, matA, matB, identity, result; |
| |
| beforeEach(function() { |
| matA = [1, 2, |
| 3, 4]; |
| |
| matB = [5, 6, |
| 7, 8]; |
| |
| out = [0, 0, |
| 0, 0]; |
| |
| identity = [1, 0, |
| 0, 1]; |
| }); |
| |
| describe("create", function() { |
| beforeEach(function() { result = mat2.create(); }); |
| it("should return a 4 element array initialized to a 2x2 identity matrix", function() { expect(result).toBeEqualish(identity); }); |
| }); |
| |
| describe("clone", function() { |
| beforeEach(function() { result = mat2.clone(matA); }); |
| it("should return a 4 element array initialized to the values in matA", function() { expect(result).toBeEqualish(matA); }); |
| }); |
| |
| describe("copy", function() { |
| beforeEach(function() { result = mat2.copy(out, matA); }); |
| it("should place values into out", function() { expect(out).toBeEqualish(matA); }); |
| it("should return out", function() { expect(result).toBe(out); }); |
| }); |
| |
| describe("identity", function() { |
| beforeEach(function() { result = mat2.identity(out); }); |
| it("should place values into out", function() { expect(result).toBeEqualish(identity); }); |
| it("should return out", function() { expect(result).toBe(out); }); |
| }); |
| |
| describe("transpose", function() { |
| describe("with a separate output matrix", function() { |
| beforeEach(function() { result = mat2.transpose(out, matA); }); |
| |
| it("should place values into out", function() { expect(out).toBeEqualish([1, 3, 2, 4]); }); |
| it("should return out", function() { expect(result).toBe(out); }); |
| it("should not modify matA", function() { expect(matA).toBeEqualish([1, 2, 3, 4]); }); |
| }); |
| |
| describe("when matA is the output matrix", function() { |
| beforeEach(function() { result = mat2.transpose(matA, matA); }); |
| |
| it("should place values into matA", function() { expect(matA).toBeEqualish([1, 3, 2, 4]); }); |
| it("should return matA", function() { expect(result).toBe(matA); }); |
| }); |
| }); |
| |
| describe("invert", function() { |
| describe("with a separate output matrix", function() { |
| beforeEach(function() { result = mat2.invert(out, matA); }); |
| |
| it("should place values into out", function() { expect(out).toBeEqualish([-2, 1, 1.5, -0.5]); }); |
| it("should return out", function() { expect(result).toBe(out); }); |
| it("should not modify matA", function() { expect(matA).toBeEqualish([1, 2, 3, 4]); }); |
| }); |
| |
| describe("when matA is the output matrix", function() { |
| beforeEach(function() { result = mat2.invert(matA, matA); }); |
| |
| it("should place values into matA", function() { expect(matA).toBeEqualish([-2, 1, 1.5, -0.5]); }); |
| it("should return matA", function() { expect(result).toBe(matA); }); |
| }); |
| }); |
| |
| describe("adjoint", function() { |
| describe("with a separate output matrix", function() { |
| beforeEach(function() { result = mat2.adjoint(out, matA); }); |
| |
| it("should place values into out", function() { expect(out).toBeEqualish([4, -2, -3, 1]); }); |
| it("should return out", function() { expect(result).toBe(out); }); |
| it("should not modify matA", function() { expect(matA).toBeEqualish([1, 2, 3, 4]); }); |
| }); |
| |
| describe("when matA is the output matrix", function() { |
| beforeEach(function() { result = mat2.adjoint(matA, matA); }); |
| |
| it("should place values into matA", function() { expect(matA).toBeEqualish([4, -2, -3, 1]); }); |
| it("should return matA", function() { expect(result).toBe(matA); }); |
| }); |
| }); |
| |
| describe("determinant", function() { |
| beforeEach(function() { result = mat2.determinant(matA); }); |
| |
| it("should return the determinant", function() { expect(result).toEqual(-2); }); |
| }); |
| |
| describe("multiply", function() { |
| it("should have an alias called 'mul'", function() { expect(mat2.mul).toEqual(mat2.multiply); }); |
| |
| describe("with a separate output matrix", function() { |
| beforeEach(function() { result = mat2.multiply(out, matA, matB); }); |
| |
| it("should place values into out", function() { expect(out).toBeEqualish([19, 22, 43, 50]); }); |
| it("should return out", function() { expect(result).toBe(out); }); |
| it("should not modify matA", function() { expect(matA).toBeEqualish([1, 2, 3, 4]); }); |
| it("should not modify matB", function() { expect(matB).toBeEqualish([5, 6, 7, 8]); }); |
| }); |
| |
| describe("when matA is the output matrix", function() { |
| beforeEach(function() { result = mat2.multiply(matA, matA, matB); }); |
| |
| it("should place values into matA", function() { expect(matA).toBeEqualish([19, 22, 43, 50]); }); |
| it("should return matA", function() { expect(result).toBe(matA); }); |
| it("should not modify matB", function() { expect(matB).toBeEqualish([5, 6, 7, 8]); }); |
| }); |
| |
| describe("when matB is the output matrix", function() { |
| beforeEach(function() { result = mat2.multiply(matB, matA, matB); }); |
| |
| it("should place values into matB", function() { expect(matB).toBeEqualish([19, 22, 43, 50]); }); |
| it("should return matB", function() { expect(result).toBe(matB); }); |
| it("should not modify matA", function() { expect(matA).toBeEqualish([1, 2, 3, 4]); }); |
| }); |
| }); |
| |
| describe("rotate", function() { |
| describe("with a separate output matrix", function() { |
| beforeEach(function() { result = mat2.rotate(out, matA, Math.PI * 0.5); }); |
| |
| it("should place values into out", function() { expect(out).toBeEqualish([2, -1, 4, -3]); }); |
| it("should return out", function() { expect(result).toBe(out); }); |
| it("should not modify matA", function() { expect(matA).toBeEqualish([1, 2, 3, 4]); }); |
| }); |
| |
| describe("when matA is the output matrix", function() { |
| beforeEach(function() { result = mat2.rotate(matA, matA, Math.PI * 0.5); }); |
| |
| it("should place values into matA", function() { expect(matA).toBeEqualish([2, -1, 4, -3]); }); |
| it("should return matA", function() { expect(result).toBe(matA); }); |
| }); |
| }); |
| |
| describe("scale", function() { |
| var vecA; |
| beforeEach(function() { vecA = [2, 3]; }); |
| |
| describe("with a separate output matrix", function() { |
| beforeEach(function() { result = mat2.scale(out, matA, vecA); }); |
| |
| it("should place values into out", function() { expect(out).toBeEqualish([2, 6, 6, 12]); }); |
| it("should return out", function() { expect(result).toBe(out); }); |
| it("should not modify matA", function() { expect(matA).toBeEqualish([1, 2, 3, 4]); }); |
| }); |
| |
| describe("when matA is the output matrix", function() { |
| beforeEach(function() { result = mat2.scale(matA, matA, vecA); }); |
| |
| it("should place values into matA", function() { expect(matA).toBeEqualish([2, 6, 6, 12]); }); |
| it("should return matA", function() { expect(result).toBe(matA); }); |
| }); |
| }); |
| |
| describe("str", function() { |
| beforeEach(function() { result = mat2.str(matA); }); |
| |
| it("should return a string representation of the matrix", function() { expect(result).toEqual("mat2(1, 2, 3, 4)"); }); |
| }); |
| }); |