| /* 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("mat3", function() { |
| var out, matA, matB, identity, result; |
| |
| beforeEach(function() { |
| matA = [1, 0, 0, |
| 0, 1, 0, |
| 1, 2, 1]; |
| |
| matB = [1, 0, 0, |
| 0, 1, 0, |
| 3, 4, 1]; |
| |
| out = [0, 0, 0, |
| 0, 0, 0, |
| 0, 0, 0]; |
| |
| identity = [1, 0, 0, |
| 0, 1, 0, |
| 0, 0, 1]; |
| }); |
| |
| describe("fromMat4", function() { |
| beforeEach(function() { |
| result = mat3.fromMat4(out, [ 1, 2, 3, 4, |
| 5, 6, 7, 8, |
| 9,10,11,12, |
| 13,14,15,16]); }); |
| |
| it("should return out", function() { expect(result).toBe(out); }); |
| |
| it("should calculate proper mat3", function() { |
| expect(out).toBeEqualish([ 1, 2, 3, |
| 5, 6, 7, |
| 9,10,11]); |
| }); |
| }); |
| |
| describe("create", function() { |
| beforeEach(function() { result = mat3.create(); }); |
| it("should return a 9 element array initialized to a 3x3 identity matrix", function() { expect(result).toBeEqualish(identity); }); |
| }); |
| |
| describe("clone", function() { |
| beforeEach(function() { result = mat3.clone(matA); }); |
| it("should return a 9 element array initialized to the values in matA", function() { expect(result).toBeEqualish(matA); }); |
| }); |
| |
| describe("copy", function() { |
| beforeEach(function() { result = mat3.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 = mat3.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 = mat3.transpose(out, matA); }); |
| |
| it("should place values into out", function() { |
| expect(out).toBeEqualish([ |
| 1, 0, 1, |
| 0, 1, 2, |
| 0, 0, 1 |
| ]); |
| }); |
| it("should return out", function() { expect(result).toBe(out); }); |
| it("should not modify matA", function() { |
| expect(matA).toBeEqualish([ |
| 1, 0, 0, |
| 0, 1, 0, |
| 1, 2, 1 |
| ]); |
| }); |
| }); |
| |
| describe("when matA is the output matrix", function() { |
| beforeEach(function() { result = mat3.transpose(matA, matA); }); |
| |
| it("should place values into matA", function() { |
| expect(matA).toBeEqualish([ |
| 1, 0, 1, |
| 0, 1, 2, |
| 0, 0, 1 |
| ]); |
| }); |
| it("should return matA", function() { expect(result).toBe(matA); }); |
| }); |
| }); |
| |
| describe("invert", function() { |
| describe("with a separate output matrix", function() { |
| beforeEach(function() { result = mat3.invert(out, matA); }); |
| |
| it("should place values into out", function() { |
| expect(out).toBeEqualish([ |
| 1, 0, 0, |
| 0, 1, 0, |
| -1, -2, 1 |
| ]); |
| }); |
| it("should return out", function() { expect(result).toBe(out); }); |
| it("should not modify matA", function() { |
| expect(matA).toBeEqualish([ |
| 1, 0, 0, |
| 0, 1, 0, |
| 1, 2, 1 |
| ]); |
| }); |
| }); |
| |
| describe("when matA is the output matrix", function() { |
| beforeEach(function() { result = mat3.invert(matA, matA); }); |
| |
| it("should place values into matA", function() { |
| expect(matA).toBeEqualish([ |
| 1, 0, 0, |
| 0, 1, 0, |
| -1, -2, 1 |
| ]); |
| }); |
| it("should return matA", function() { expect(result).toBe(matA); }); |
| }); |
| }); |
| |
| describe("adjoint", function() { |
| describe("with a separate output matrix", function() { |
| beforeEach(function() { result = mat3.adjoint(out, matA); }); |
| |
| it("should place values into out", function() { |
| expect(out).toBeEqualish([ |
| 1, 0, 0, |
| 0, 1, 0, |
| -1, -2, 1 |
| ]); |
| }); |
| it("should return out", function() { expect(result).toBe(out); }); |
| it("should not modify matA", function() { |
| expect(matA).toBeEqualish([ |
| 1, 0, 0, |
| 0, 1, 0, |
| 1, 2, 1 |
| ]); |
| }); |
| }); |
| |
| describe("when matA is the output matrix", function() { |
| beforeEach(function() { result = mat3.adjoint(matA, matA); }); |
| |
| it("should place values into matA", function() { |
| expect(matA).toBeEqualish([ |
| 1, 0, 0, |
| 0, 1, 0, |
| -1, -2, 1 |
| ]); |
| }); |
| it("should return matA", function() { expect(result).toBe(matA); }); |
| }); |
| }); |
| |
| describe("determinant", function() { |
| beforeEach(function() { result = mat3.determinant(matA); }); |
| |
| it("should return the determinant", function() { expect(result).toEqual(1); }); |
| }); |
| |
| describe("multiply", function() { |
| it("should have an alias called 'mul'", function() { expect(mat3.mul).toEqual(mat3.multiply); }); |
| |
| describe("with a separate output matrix", function() { |
| beforeEach(function() { result = mat3.multiply(out, matA, matB); }); |
| |
| it("should place values into out", function() { |
| expect(out).toBeEqualish([ |
| 1, 0, 0, |
| 0, 1, 0, |
| 4, 6, 1 |
| ]); |
| }); |
| it("should return out", function() { expect(result).toBe(out); }); |
| it("should not modify matA", function() { |
| expect(matA).toBeEqualish([ |
| 1, 0, 0, |
| 0, 1, 0, |
| 1, 2, 1 |
| ]); |
| }); |
| it("should not modify matB", function() { |
| expect(matB).toBeEqualish([ |
| 1, 0, 0, |
| 0, 1, 0, |
| 3, 4, 1 |
| ]); |
| }); |
| }); |
| |
| describe("when matA is the output matrix", function() { |
| beforeEach(function() { result = mat3.multiply(matA, matA, matB); }); |
| |
| it("should place values into matA", function() { |
| expect(matA).toBeEqualish([ |
| 1, 0, 0, |
| 0, 1, 0, |
| 4, 6, 1 |
| ]); |
| }); |
| it("should return matA", function() { expect(result).toBe(matA); }); |
| it("should not modify matB", function() { |
| expect(matB).toBeEqualish([ |
| 1, 0, 0, |
| 0, 1, 0, |
| 3, 4, 1 |
| ]); |
| }); |
| }); |
| |
| describe("when matB is the output matrix", function() { |
| beforeEach(function() { result = mat3.multiply(matB, matA, matB); }); |
| |
| it("should place values into matB", function() { |
| expect(matB).toBeEqualish([ |
| 1, 0, 0, |
| 0, 1, 0, |
| 4, 6, 1 |
| ]); |
| }); |
| it("should return matB", function() { expect(result).toBe(matB); }); |
| it("should not modify matA", function() { |
| expect(matA).toBeEqualish([ |
| 1, 0, 0, |
| 0, 1, 0, |
| 1, 2, 1 |
| ]); |
| }); |
| }); |
| }); |
| |
| describe("str", function() { |
| beforeEach(function() { result = mat3.str(matA); }); |
| |
| it("should return a string representation of the matrix", function() { expect(result).toEqual("mat3(1, 0, 0, 0, 1, 0, 1, 2, 1)"); }); |
| }); |
| }); |