math test reviewed

test/math_test.cpp

@@ -5,14 +5,17 @@
 //  James Turk (jpt2433@rit.edu)
 //
 // Version:
-//  $Id: math_test.cpp,v 1.3 2005/07/17 02:40:39 cozman Exp $
+//  $Id: math_test.cpp,v 1.4 2005/07/20 01:47:15 cozman Exp $
 
-// Tests almost everything within photon::math
+// Tests almost everything within photon::math (example run at bottom of file)
 // Doesn't test:
 //  -Circle-Rectangle intersection: hard to test without graphics
 //  -Accessors: so many of them, simple to detect problems, possibly add later
-//  -Rect: coming soon
-//  -Vector2: coming soon
+//
+// example checks should always contain a positive check followed by a negative
+// ex:
+//  a contains origin
+//  b doesn't contain origin
 
 #include <iostream>
 #include <iomanip>
@@ -20,10 +23,6 @@
 using namespace photon;
 using namespace std;
 
-// example checks should always contain a positive check followed by a negative
-// ex:
-//  a contains origin
-//  b doesn't contain origin
 
 void testGeneral()
 {
@@ -169,3 +168,82 @@ int main()
     testRect();
     testVector2();
 }
+
+// Example run (values may vary slightly):
+// --General Math-------------------------------------------------
+// PI = 3.141592654
+// clamp(2.5, 0, 5)  = 2.5
+// clamp(-1, 0, 5)  = 0
+// clamp(1000, 0, 5)  = 5
+// scalarCompare(3.0, 3.0000001) are  equal
+// scalarCompare(3.0, 3.1) are not equal
+// PI/6 radians = 30 degrees
+// 45 degrees = 0.785 radians
+// 
+// --Circles------------------------------------------------------
+// a: Circle { Center: (0,0) Radius: 1 }
+// b: Circle { Center: (10,10) Radius: 25 }
+// c: Circle { Center: (-10,-10) Radius: 1 }
+// a == a
+// a != b
+// Moving a to 100,100: a: Circle { Center: (100,100) Radius: 1 }
+// Moving a by -100,-100: a: Circle { Center: (0,0) Radius: 1 }
+// Resizing a's radius to 2: a: Circle { Center: (0,0) Radius: 2 }
+// Resizing a's radius by -3 (can't have negative radius): a: Circle 
+//      { Center: (0,0) Radius: 0 }
+// Resizing a's radius by +3: a: Circle { Center: (0,0) Radius: 3 }
+// a and b intersect.
+// a and c do not intersect.
+// a contains (0,0).
+// c doesn't contain (0,0).
+// 
+// --Rects--------------------------------------------------------
+// a: Rect { Top left: (-4,-4) Width: 4 Height: 4 }
+// b: Rect { Top left: (-4,-4) Width: 10 Height: 10 }
+// c: Rect { Top left: (-4,-4) Width: 4 Height: 4 }
+// d: Rect { Top left: (-3,-3) Width: 1 Height: 1 }
+// a == a
+// a != b
+// Moving a to 0,0: a: Rect { Top left: (0,0) Width: 4 Height: 4 }
+// Moving a by 4,4: a: Rect { Top left: (4,4) Width: 4 Height: 4 }
+// Resizing a to 8x8: a: Rect { Top left: (4,4) Width: 8 Height: 8 }
+// Resizing a by 2 in each direction: a: 
+//      Rect { Top left: (4,4) Width: 10 Height: 10 }
+// a and b intersect.
+// a and c do not intersect.
+// c contains d
+// d doesn't contain c
+// c contains (0,0).
+// d doesn't contain (0,0).
+// a.calcIntersection(b) = Rect { Top left: (4,4) Width: 2 Height: 2 }
+// a.calcIntersection(a) = Rect { Top left: (4,4) Width: 10 Height: 10 }
+// a.calcIntersection(c) = Rect { Top left: (0,0) Width: 0 Height: 0 }
+// 
+// --Vector2------------------------------------------------------
+// a: (0,0)
+// b: (1,2)
+// Setting a to [5,5]: a: (5,5)
+// Setting a to 5 units long at 45 degrees: a: (3.54,-3.54)
+// Setting a to 5 units long at pi radians: a: (-5,-6.12e-16)
+// Normalizing a: a: (-1,-1.22e-16)
+// a == a
+// a != b
+// -a = (1,1.22e-16)
+// a.b = -1
+// a+b = (0,2)
+// a-b = (-2,-2)
+// 2*a = (-2,-2.45e-16)
+// a/2 = (-0.5,-6.12e-17)
+// a += b: (0,2)
+// a -= b: (-1,-2.22e-16)
+// |a| = 1
+// |b| = 2.24
+// angle of a (deg) = -180
+// angle of b (deg) = 63.4
+// angle of a (rad) = -3.14
+// angle of b (rad) = 1.11
+// normal of a: (-1,-2.22e-16)
+// normal of b: (0.447,0.894)
+// angle between a and b (deg): 117
+// angle between a and b (rad): 2.03
+// distance between a and b: 2.83