[cc-frame-viewer] Add gl-matrix to third_party [redux]

tools/cc-frame-viewer/third_party/gl-matrix/spec/gl-matrix/vec2-spec.js

+/* 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("vec2", function() {
+    var out, vecA, vecB, result;
+
+    beforeEach(function() { vecA = [1, 2]; vecB = [3, 4]; out = [0, 0]; });
+
+    describe("create", function() {
+        beforeEach(function() { result = vec2.create(); });
+        it("should return a 2 element array initialized to 0s", function() { expect(result).toBeEqualish([0, 0]); });
+    });
+
+    describe("clone", function() {
+        beforeEach(function() { result = vec2.clone(vecA); });
+        it("should return a 2 element array initialized to the values in vecA", function() { expect(result).toBeEqualish(vecA); });
+    });
+
+    describe("fromValues", function() {
+        beforeEach(function() { result = vec2.fromValues(1, 2); });
+        it("should return a 2 element array initialized to the values passed", function() { expect(result).toBeEqualish([1, 2]); });
+    });
+
+    describe("copy", function() {
+        beforeEach(function() { result = vec2.copy(out, vecA); });
+        it("should place values into out", function() { expect(out).toBeEqualish([1, 2]); });
+        it("should return out", function() { expect(result).toBe(out); });
+    });
+
+    describe("set", function() {
+        beforeEach(function() { result = vec2.set(out, 1, 2); });
+        it("should place values into out", function() { expect(out).toBeEqualish([1, 2]); });
+        it("should return out", function() { expect(result).toBe(out); });
+    });
+    
+    describe("add", function() {
+        describe("with a separate output vector", function() {
+            beforeEach(function() { result = vec2.add(out, vecA, vecB); });
+            
+            it("should place values into out", function() { expect(out).toBeEqualish([4, 6]); });
+            it("should return out", function() { expect(result).toBe(out); });
+            it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 2]); });
+            it("should not modify vecB", function() { expect(vecB).toBeEqualish([3, 4]); });
+        });
+
+        describe("when vecA is the output vector", function() {
+            beforeEach(function() { result = vec2.add(vecA, vecA, vecB); });
+            
+            it("should place values into vecA", function() { expect(vecA).toBeEqualish([4, 6]); });
+            it("should return vecA", function() { expect(result).toBe(vecA); });
+            it("should not modify vecB", function() { expect(vecB).toBeEqualish([3, 4]); });
+        });
+
+        describe("when vecB is the output vector", function() {
+            beforeEach(function() { result = vec2.add(vecB, vecA, vecB); });
+            
+            it("should place values into vecB", function() { expect(vecB).toBeEqualish([4, 6]); });
+            it("should return vecB", function() { expect(result).toBe(vecB); });
+            it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 2]); });
+        });
+    });
+    
+    describe("subtract", function() {
+        it("should have an alias called 'sub'", function() { expect(vec2.sub).toEqual(vec2.subtract); });
+
+        describe("with a separate output vector", function() {
+            beforeEach(function() { result = vec2.subtract(out, vecA, vecB); });
+            
+            it("should place values into out", function() { expect(out).toBeEqualish([-2, -2]); });
+            it("should return out", function() { expect(result).toBe(out); });
+            it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 2]); });
+            it("should not modify vecB", function() { expect(vecB).toBeEqualish([3, 4]); });
+        });
+
+        describe("when vecA is the output vector", function() {
+            beforeEach(function() { result = vec2.subtract(vecA, vecA, vecB); });
+            
+            it("should place values into vecA", function() { expect(vecA).toBeEqualish([-2, -2]); });
+            it("should return vecA", function() { expect(result).toBe(vecA); });
+            it("should not modify vecB", function() { expect(vecB).toBeEqualish([3, 4]); });
+        });
+
+        describe("when vecB is the output vector", function() {
+            beforeEach(function() { result = vec2.subtract(vecB, vecA, vecB); });
+            
+            it("should place values into vecB", function() { expect(vecB).toBeEqualish([-2, -2]); });
+            it("should return vecB", function() { expect(result).toBe(vecB); });
+            it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 2]); });
+        });
+    });
+
+    describe("multiply", function() {
+        it("should have an alias called 'mul'", function() { expect(vec2.mul).toEqual(vec2.multiply); });
+
+        describe("with a separate output vector", function() {
+            beforeEach(function() { result = vec2.multiply(out, vecA, vecB); });
+            
+            it("should place values into out", function() { expect(out).toBeEqualish([3, 8]); });
+            it("should return out", function() { expect(result).toBe(out); });
+            it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 2]); });
+            it("should not modify vecB", function() { expect(vecB).toBeEqualish([3, 4]); });
+        });
+
+        describe("when vecA is the output vector", function() {
+            beforeEach(function() { result = vec2.multiply(vecA, vecA, vecB); });
+            
+            it("should place values into vecA", function() { expect(vecA).toBeEqualish([3, 8]); });
+            it("should return vecA", function() { expect(result).toBe(vecA); });
+            it("should not modify vecB", function() { expect(vecB).toBeEqualish([3, 4]); });
+        });
+
+        describe("when vecB is the output vector", function() {
+            beforeEach(function() { result = vec2.multiply(vecB, vecA, vecB); });
+            
+            it("should place values into vecB", function() { expect(vecB).toBeEqualish([3, 8]); });
+            it("should return vecB", function() { expect(result).toBe(vecB); });
+            it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 2]); });
+        });
+    });
+
+    describe("divide", function() {
+        it("should have an alias called 'div'", function() { expect(vec2.div).toEqual(vec2.divide); });
+
+        describe("with a separate output vector", function() {
+            beforeEach(function() { result = vec2.divide(out, vecA, vecB); });
+            
+            it("should place values into out", function() { expect(out).toBeEqualish([0.3333333, 0.5]); });
+            it("should return out", function() { expect(result).toBe(out); });
+            it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 2]); });
+            it("should not modify vecB", function() { expect(vecB).toBeEqualish([3, 4]); });
+        });
+
+        describe("when vecA is the output vector", function() {
+            beforeEach(function() { result = vec2.divide(vecA, vecA, vecB); });
+            
+            it("should place values into vecA", function() { expect(vecA).toBeEqualish([0.3333333, 0.5]); });
+            it("should return vecA", function() { expect(result).toBe(vecA); });
+            it("should not modify vecB", function() { expect(vecB).toBeEqualish([3, 4]); });
+        });
+
+        describe("when vecB is the output vector", function() {
+            beforeEach(function() { result = vec2.divide(vecB, vecA, vecB); });
+            
+            it("should place values into vecB", function() { expect(vecB).toBeEqualish([0.3333333, 0.5]); });
+            it("should return vecB", function() { expect(result).toBe(vecB); });
+            it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 2]); });
+        });
+    });
+
+    describe("min", function() {
+        beforeEach(function() { vecA = [1, 4]; vecB = [3, 2]; });
+
+        describe("with a separate output vector", function() {
+            beforeEach(function() { result = vec2.min(out, vecA, vecB); });
+            
+            it("should place values into out", function() { expect(out).toBeEqualish([1, 2]); });
+            it("should return out", function() { expect(result).toBe(out); });
+            it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 4]); });
+            it("should not modify vecB", function() { expect(vecB).toBeEqualish([3, 2]); });
+        });
+
+        describe("when vecA is the output vector", function() {
+            beforeEach(function() { result = vec2.min(vecA, vecA, vecB); });
+            
+            it("should place values into vecA", function() { expect(vecA).toBeEqualish([1, 2]); });
+            it("should return vecA", function() { expect(result).toBe(vecA); });
+            it("should not modify vecB", function() { expect(vecB).toBeEqualish([3, 2]); });
+        });
+
+        describe("when vecB is the output vector", function() {
+            beforeEach(function() { result = vec2.min(vecB, vecA, vecB); });
+            
+            it("should place values into vecB", function() { expect(vecB).toBeEqualish([1, 2]); });
+            it("should return vecB", function() { expect(result).toBe(vecB); });
+            it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 4]); });
+        });
+    });
+
+    describe("max", function() {
+        beforeEach(function() { vecA = [1, 4]; vecB = [3, 2]; });
+
+        describe("with a separate output vector", function() {
+            beforeEach(function() { result = vec2.max(out, vecA, vecB); });
+            
+            it("should place values into out", function() { expect(out).toBeEqualish([3, 4]); });
+            it("should return out", function() { expect(result).toBe(out); });
+            it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 4]); });
+            it("should not modify vecB", function() { expect(vecB).toBeEqualish([3, 2]); });
+        });
+
+        describe("when vecA is the output vector", function() {
+            beforeEach(function() { result = vec2.max(vecA, vecA, vecB); });
+            
+            it("should place values into vecA", function() { expect(vecA).toBeEqualish([3, 4]); });
+            it("should return vecA", function() { expect(result).toBe(vecA); });
+            it("should not modify vecB", function() { expect(vecB).toBeEqualish([3, 2]); });
+        });
+
+        describe("when vecB is the output vector", function() {
+            beforeEach(function() { result = vec2.max(vecB, vecA, vecB); });
+            
+            it("should place values into vecB", function() { expect(vecB).toBeEqualish([3, 4]); });
+            it("should return vecB", function() { expect(result).toBe(vecB); });
+            it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 4]); });
+        });
+    });
+
+    describe("scale", function() {
+        describe("with a separate output vector", function() {
+            beforeEach(function() { result = vec2.scale(out, vecA, 2); });
+            
+            it("should place values into out", function() { expect(out).toBeEqualish([2, 4]); });
+            it("should return out", function() { expect(result).toBe(out); });
+            it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 2]); });
+        });
+
+        describe("when vecA is the output vector", function() {
+            beforeEach(function() { result = vec2.scale(vecA, vecA, 2); });
+            
+            it("should place values into vecA", function() { expect(vecA).toBeEqualish([2, 4]); });
+            it("should return vecA", function() { expect(result).toBe(vecA); });
+        });
+    });
+
+    describe("distance", function() {
+        it("should have an alias called 'dist'", function() { expect(vec2.dist).toEqual(vec2.distance); });
+
+        beforeEach(function() { result = vec2.distance(vecA, vecB); });
+        
+        it("should return the distance", function() { expect(result).toBeCloseTo(2.828427); });
+    });
+
+    describe("squaredDistance", function() {
+        it("should have an alias called 'sqrDist'", function() { expect(vec2.sqrDist).toEqual(vec2.squaredDistance); });
+
+        beforeEach(function() { result = vec2.squaredDistance(vecA, vecB); });
+        
+        it("should return the squared distance", function() { expect(result).toEqual(8); });
+    });
+
+    describe("length", function() {
+        it("should have an alias called 'len'", function() { expect(vec2.len).toEqual(vec2.length); });
+
+        beforeEach(function() { result = vec2.length(vecA); });
+        
+        it("should return the length", function() { expect(result).toBeCloseTo(2.236067); });
+    });
+
+    describe("squaredLength", function() {
+        it("should have an alias called 'sqrLen'", function() { expect(vec2.sqrLen).toEqual(vec2.squaredLength); });
+
+        beforeEach(function() { result = vec2.squaredLength(vecA); });
+        
+        it("should return the squared length", function() { expect(result).toEqual(5); });
+    });
+
+    describe("negate", function() {
+        describe("with a separate output vector", function() {
+            beforeEach(function() { result = vec2.negate(out, vecA); });
+            
+            it("should place values into out", function() { expect(out).toBeEqualish([-1, -2]); });
+            it("should return out", function() { expect(result).toBe(out); });
+            it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 2]); });
+        });
+
+        describe("when vecA is the output vector", function() {
+            beforeEach(function() { result = vec2.negate(vecA, vecA); });
+            
+            it("should place values into vecA", function() { expect(vecA).toBeEqualish([-1, -2]); });
+            it("should return vecA", function() { expect(result).toBe(vecA); });
+        });
+    });
+
+    describe("normalize", function() {
+        beforeEach(function() { vecA = [5, 0]; });
+
+        describe("with a separate output vector", function() {
+            beforeEach(function() { result = vec2.normalize(out, vecA); });
+            
+            it("should place values into out", function() { expect(out).toBeEqualish([1, 0]); });
+            it("should return out", function() { expect(result).toBe(out); });
+            it("should not modify vecA", function() { expect(vecA).toBeEqualish([5, 0]); });
+        });
+
+        describe("when vecA is the output vector", function() {
+            beforeEach(function() { result = vec2.normalize(vecA, vecA); });
+            
+            it("should place values into vecA", function() { expect(vecA).toBeEqualish([1, 0]); });
+            it("should return vecA", function() { expect(result).toBe(vecA); });
+        });
+    });
+
+    describe("dot", function() {
+        beforeEach(function() { result = vec2.dot(vecA, vecB); });
+        
+        it("should return the dot product", function() { expect(result).toEqual(11); });
+        it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 2]); });
+        it("should not modify vecB", function() { expect(vecB).toBeEqualish([3, 4]); });
+    });
+
+    describe("cross", function() {
+        var out3;
+
+        beforeEach(function() {
+            out3 = [0, 0, 0];
+            result = vec2.cross(out3, vecA, vecB);
+        });
+
+        it("should place values into out", function() { expect(out3).toBeEqualish([0, 0, -2]); });
+        it("should return out", function() { expect(result).toBe(out3); });
+        it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 2]); });
+        it("should not modify vecB", function() { expect(vecB).toBeEqualish([3, 4]); });
+    });
+
+    describe("lerp", function() {
+        describe("with a separate output vector", function() {
+            beforeEach(function() { result = vec2.lerp(out, vecA, vecB, 0.5); });
+            
+            it("should place values into out", function() { expect(out).toBeEqualish([2, 3]); });
+            it("should return out", function() { expect(result).toBe(out); });
+            it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 2]); });
+            it("should not modify vecB", function() { expect(vecB).toBeEqualish([3, 4]); });
+        });
+
+        describe("when vecA is the output vector", function() {
+            beforeEach(function() { result = vec2.lerp(vecA, vecA, vecB, 0.5); });
+            
+            it("should place values into vecA", function() { expect(vecA).toBeEqualish([2, 3]); });
+            it("should return vecA", function() { expect(result).toBe(vecA); });
+            it("should not modify vecB", function() { expect(vecB).toBeEqualish([3, 4]); });
+        });
+
+        describe("when vecB is the output vector", function() {
+            beforeEach(function() { result = vec2.lerp(vecB, vecA, vecB, 0.5); });
+            
+            it("should place values into vecB", function() { expect(vecB).toBeEqualish([2, 3]); });
+            it("should return vecB", function() { expect(result).toBe(vecB); });
+            it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 2]); });
+        });
+    });
+
+    describe("transformMat2", function() {
+        var matA;
+        beforeEach(function() { matA = [1, 2, 3, 4]; });
+
+        describe("with a separate output vector", function() {
+            beforeEach(function() { result = vec2.transformMat2(out, vecA, matA); });
+            
+            it("should place values into out", function() { expect(out).toBeEqualish([7, 10]); });
+            it("should return out", function() { expect(result).toBe(out); });
+            it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 2]); });
+            it("should not modify matA", function() { expect(matA).toBeEqualish([1, 2, 3, 4]); });
+        });
+
+        describe("when vecA is the output vector", function() {
+            beforeEach(function() { result = vec2.transformMat2(vecA, vecA, matA); });
+            
+            it("should place values into vecA", function() { expect(vecA).toBeEqualish([7, 10]); });
+            it("should return vecA", function() { expect(result).toBe(vecA); });
+            it("should not modify matA", function() { expect(matA).toBeEqualish([1, 2, 3, 4]); });
+        });
+    });
+
+    describe("transformMat2d", function() {
+        var matA;
+        beforeEach(function() { matA = [1, 2, 3, 4, 5, 6]; });
+
+        describe("with a separate output vector", function() {
+            beforeEach(function() { result = vec2.transformMat2d(out, vecA, matA); });
+            
+            it("should place values into out", function() { expect(out).toBeEqualish([12, 16]); });
+            it("should return out", function() { expect(result).toBe(out); });
+            it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 2]); });
+            it("should not modify matA", function() { expect(matA).toBeEqualish([1, 2, 3, 4, 5, 6]); });
+        });
+
+        describe("when vecA is the output vector", function() {
+            beforeEach(function() { result = vec2.transformMat2d(vecA, vecA, matA); });
+            
+            it("should place values into vecA", function() { expect(vecA).toBeEqualish([12, 16]); });
+            it("should return vecA", function() { expect(result).toBe(vecA); });
+            it("should not modify matA", function() { expect(matA).toBeEqualish([1, 2, 3, 4, 5, 6]); });
+        });
+    });
+
+    describe("forEach", function() {
+        var vecArray;
+
+        beforeEach(function() {
+            vecArray = [
+                1, 2,
+                3, 4,
+                0, 0
+            ];
+        });
+
+        describe("when performing operations that take no extra arguments", function() {
+            beforeEach(function() { result = vec2.forEach(vecArray, 0, 0, 0, vec2.normalize); });
+            
+            it("should update all values", function() { 
+                expect(vecArray).toBeEqualish([
+                    0.447214, 0.894427,
+                    0.6, 0.8,
+                    0, 0
+                ]); 
+            });
+            it("should return vecArray", function() { expect(result).toBe(vecArray); });
+        });
+
+        describe("when performing operations that takes one extra arguments", function() {
+            beforeEach(function() { result = vec2.forEach(vecArray, 0, 0, 0, vec2.add, vecA); });
+            
+            it("should update all values", function() {
+                expect(vecArray).toBeEqualish([
+                    2, 4,
+                    4, 6,
+                    1, 2
+                ]); 
+            });
+            it("should return vecArray", function() { expect(result).toBe(vecArray); });
+            it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 2]); });
+        });
+
+        describe("when specifying an offset", function() {
+            beforeEach(function() { result = vec2.forEach(vecArray, 0, 2, 0, vec2.add, vecA); });
+            
+            it("should update all values except the first vector", function() {
+                expect(vecArray).toBeEqualish([
+                    1, 2,
+                    4, 6,
+                    1, 2
+                ]); 
+            });
+            it("should return vecArray", function() { expect(result).toBe(vecArray); });
+            it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 2]); });
+        });
+
+        describe("when specifying a count", function() {
+            beforeEach(function() { result = vec2.forEach(vecArray, 0, 0, 2, vec2.add, vecA); });
+            
+            it("should update all values except the last vector", function() {
+                expect(vecArray).toBeEqualish([
+                    2, 4,
+                    4, 6,
+                    0, 0
+                ]); 
+            });
+            it("should return vecArray", function() { expect(result).toBe(vecArray); });
+            it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 2]); });
+        });
+
+        describe("when specifying a stride", function() {
+            beforeEach(function() { result = vec2.forEach(vecArray, 4, 0, 0, vec2.add, vecA); });
+            
+            it("should update all values except the second vector", function() {
+                expect(vecArray).toBeEqualish([
+                    2, 4,
+                    3, 4,
+                    1, 2
+                ]); 
+            });
+            it("should return vecArray", function() { expect(result).toBe(vecArray); });
+            it("should not modify vecA", function() { expect(vecA).toBeEqualish([1, 2]); });
+        });
+
+        describe("when calling a function that does not modify the out variable", function() {
+            beforeEach(function() { 
+                result = vec2.forEach(vecArray, 0, 0, 0, function(out, vec) {}); 
+            });
+            
+            it("values should remain unchanged", function() {
+                expect(vecArray).toBeEqualish([
+                    1, 2,
+                    3, 4,
+                    0, 0,
+                ]); 
+            });
+            it("should return vecArray", function() { expect(result).toBe(vecArray); });
+        });
+    });
+
+    describe("str", function() {
+        beforeEach(function() { result = vec2.str(vecA); });
+        
+        it("should return a string representation of the vector", function() { expect(result).toEqual("vec2(1, 2)"); });
+    });
+});