| /* 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("mat2d", function() { |
| var out, matA, matB, identity, result; |
| |
| beforeEach(function() { |
| matA = [1, 2, |
| 3, 4, |
| 5, 6]; |
| |
| oldA = [1, 2, |
| 3, 4, |
| 5, 6]; |
| |
| matB = [7, 8, |
| 9, 10, |
| 11, 12]; |
| |
| oldB = [7, 8, |
| 9, 10, |
| 11, 12]; |
| |
| out = [0, 0, |
| 0, 0, |
| 0, 0]; |
| |
| identity = [1, 0, |
| 0, 1, |
| 0, 0]; |
| }); |
| |
| describe("create", function() { |
| beforeEach(function() { result = mat2d.create(); }); |
| it("should return a 6 element array initialized to a 2x3 identity matrix", function() { expect(result).toBeEqualish(identity); }); |
| }); |
| |
| describe("clone", function() { |
| beforeEach(function() { result = mat2d.clone(matA); }); |
| it("should return a 6 element array initialized to the values in matA", function() { expect(result).toBeEqualish(matA); }); |
| }); |
| |
| describe("copy", function() { |
| beforeEach(function() { result = mat2d.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 = mat2d.identity(out); }); |
| it("should place values into out", function() { expect(result).toBeEqualish(identity); }); |
| it("should return out", function() { expect(result).toBe(out); }); |
| }); |
| |
| describe("invert", function() { |
| describe("with a separate output matrix", function() { |
| beforeEach(function() { result = mat2d.invert(out, matA); }); |
| |
| it("should place values into out", function() { expect(out).toBeEqualish([ -2, 1, 1.5, -0.5, 1, -2 ]); }); |
| it("should return out", function() { expect(result).toBe(out); }); |
| it("should not modify matA", function() { expect(matA).toBeEqualish(oldA); }); |
| }); |
| |
| describe("when matA is the output matrix", function() { |
| beforeEach(function() { result = mat2d.invert(matA, matA); }); |
| |
| it("should place values into matA", function() { expect(matA).toBeEqualish([ -2, 1, 1.5, -0.5, 1, -2 ]); }); |
| it("should return matA", function() { expect(result).toBe(matA); }); |
| }); |
| }); |
| |
| describe("determinant", function() { |
| beforeEach(function() { result = mat2d.determinant(matA); }); |
| |
| it("should return the determinant", function() { expect(result).toEqual(-2); }); |
| }); |
| |
| describe("multiply", function() { |
| it("should have an alias called 'mul'", function() { expect(mat2d.mul).toEqual(mat2d.multiply); }); |
| |
| describe("with a separate output matrix", function() { |
| beforeEach(function() { result = mat2d.multiply(out, matA, matB); }); |
| |
| it("should place values into out", function() { expect(out).toBeEqualish([25, 28, 57, 64, 100, 112]); }); |
| it("should return out", function() { expect(result).toBe(out); }); |
| it("should not modify matA", function() { expect(matA).toBeEqualish(oldA); }); |
| it("should not modify matB", function() { expect(matB).toBeEqualish(oldB); }); |
| }); |
| |
| describe("when matA is the output matrix", function() { |
| beforeEach(function() { result = mat2d.multiply(matA, matA, matB); }); |
| |
| it("should place values into matA", function() { expect(matA).toBeEqualish([25, 28, 57, 64, 100, 112]); }); |
| it("should return matA", function() { expect(result).toBe(matA); }); |
| it("should not modify matB", function() { expect(matB).toBeEqualish(oldB); }); |
| }); |
| |
| describe("when matB is the output matrix", function() { |
| beforeEach(function() { result = mat2d.multiply(matB, matA, matB); }); |
| |
| it("should place values into matB", function() { expect(matB).toBeEqualish([25, 28, 57, 64, 100, 112]); }); |
| it("should return matB", function() { expect(result).toBe(matB); }); |
| it("should not modify matA", function() { expect(matA).toBeEqualish(oldA); }); |
| }); |
| }); |
| |
| describe("rotate", function() { |
| describe("with a separate output matrix", function() { |
| beforeEach(function() { result = mat2d.rotate(out, matA, Math.PI * 0.5); }); |
| |
| it("should place values into out", function() { expect(out).toBeEqualish([2, -1, 4, -3, 6, -5]); }); |
| it("should return out", function() { expect(result).toBe(out); }); |
| it("should not modify matA", function() { expect(matA).toBeEqualish(oldA); }); |
| }); |
| |
| describe("when matA is the output matrix", function() { |
| beforeEach(function() { result = mat2d.rotate(matA, matA, Math.PI * 0.5); }); |
| |
| it("should place values into matA", function() { expect(matA).toBeEqualish([2, -1, 4, -3, 6, -5]); }); |
| 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 = mat2d.scale(out, matA, vecA); }); |
| |
| it("should place values into out", function() { expect(out).toBeEqualish([2, 6, 6, 12, 10, 18]); }); |
| it("should return out", function() { expect(result).toBe(out); }); |
| it("should not modify matA", function() { expect(matA).toBeEqualish(oldA); }); |
| }); |
| |
| describe("when matA is the output matrix", function() { |
| beforeEach(function() { result = mat2d.scale(matA, matA, vecA); }); |
| |
| it("should place values into matA", function() { expect(matA).toBeEqualish([2, 6, 6, 12, 10, 18]); }); |
| it("should return matA", function() { expect(result).toBe(matA); }); |
| }); |
| }); |
| |
| describe("translate", function() { |
| var vecA; |
| beforeEach(function() { vecA = [2, 3]; }); |
| |
| describe("with a separate output matrix", function() { |
| beforeEach(function() { result = mat2d.translate(out, matA, vecA); }); |
| |
| it("should place values into out", function() { expect(out).toBeEqualish([1, 2, 3, 4, 7, 9]); }); |
| it("should return out", function() { expect(result).toBe(out); }); |
| it("should not modify matA", function() { expect(matA).toBeEqualish(oldA); }); |
| }); |
| |
| describe("when matA is the output matrix", function() { |
| beforeEach(function() { result = mat2d.translate(matA, matA, vecA); }); |
| |
| it("should place values into matA", function() { expect(matA).toBeEqualish([1, 2, 3, 4, 7, 9]); }); |
| it("should return matA", function() { expect(result).toBe(matA); }); |
| }); |
| }); |
| |
| describe("str", function() { |
| beforeEach(function() { result = mat2d.str(matA); }); |
| |
| it("should return a string representation of the matrix", function() { expect(result).toEqual("mat2d(1, 2, 3, 4, 5, 6)"); }); |
| }); |
| }); |