vector2d::equals now has an tolerance parameter for passing the epsilon (like...

vector2d::equals now has an tolerance parameter for passing the epsilon (like vector3d has already). Note that this changes the default behavior of vector2d::equals as well as functions using it like the operators for ==, !=, <, >, <=, >= when using vector2d with f64 as the tolerance is increased in that case (for f32 and integer values it shouldn't make any difference).

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@4584 dfc29bdd-3216-0410-991c-e03cc46cb475

changes.txt

 --------------------------
 Changes in 1.9 (not yet released)
 
+- vector2d::equals now has an tolerance parameter for passing the epsilon (like vector3d had). Note that this changes the default 
+  behavior of vector2d::equals as well as functions using it like the operators for ==, !=, <, >, <=, >= when using vector2d with f64
+  as the tolerance is increased in that case (for f32 and integer values it shouldn't make any difference).
 - Material renderers which offers blending feature (eg. EMT_TRANSPARENT_ALPHA_CHANNEL, EMT_ONETEXTURE_BLEND etc.) require SMaterial::BlendOperation set to other value than EBO_NONE.
 - Removed support for built-in T&L variables in ASM/GLSL shaders (variables related to vertices eg. gl_MultiTexCoord0 are still supported). This change allow us to reduce CPU overhead in shader material renderers.
 - IGUIEnvironment::hasFocus has now a parameter checkSubElements as subelements are usually seen as part of an element. Default unfortunately must be false due to backward compatibility.

include/vector2d.h

@@ -100,10 +100,11 @@ public:
 	//! Checks if this vector equals the other one.
 	/** Takes floating point rounding errors into account.
 	\param other Vector to compare with.
+	\param tolerance Epsilon value for both - comparing X and Y.
 	\return True if the two vector are (almost) equal, else false. */
-	bool equals(const vector2d<T>& other) const
+	bool equals(const vector2d<T>& other, const T tolerance = (T)ROUNDING_ERROR_f32 ) const
 	{
-		return core::equals(X, other.X) && core::equals(Y, other.Y);
+		return core::equals(X, other.X, tolerance) && core::equals(Y, other.Y, tolerance);
 	}
 
 	vector2d<T>& set(T nx, T ny) {X=nx; Y=ny; return *this; }