- Patch 8.0.1

Libs/DF/math.lua

@@ -8,6 +8,9 @@ end
 local UnitExists = UnitExists
 local atan2 = math.atan2
 local pi = math.pi
+local abs = math.abs 
+
+SMALL_FLOAT = 0.000001
 
 --find distance between two players
 function DF:GetDistance_Unit (unit1, unit2)
@@ -45,7 +48,7 @@ function DF:MapRangeUnclamped (inputX, inputY, outputX, outputY, value)
 	return DF:GetRangeValue (outputX, outputY, DF:GetRangePercent (inputX, inputY, value))
 end
 
---find the normalized percent fo the value in the range. e.g range of 200-400 and a value of 250 result in 0.25
+--find the normalized percent of the value in the range. e.g range of 200-400 and a value of 250 result in 0.25
 function DF:GetRangePercent (minValue, maxValue, value)
 	return (value - minValue) / (maxValue - minValue)
 end
@@ -55,12 +58,51 @@ function DF:GetRangeValue (minValue, maxValue, percent)
 	return Lerp (minValue, maxValue, percent)
 end
 
---dot product of two vectors
-function DF:GetDotProduct (v1, v2)
-	return (v1.x * v2.x) + (v1.y * v2.y)
+--dot product of two 2D Vectors
+function DF:GetDotProduct (value1, value2)
+	return (value1.x * value2.x) + (value1.y * value2.y)
 end
 
 --normalized value 0-1 result in the value on the range given, e.g 200-400 range with a value of .5 result in 300
 function DF:LerpNorm (minValue, maxValue, value)
 	return (minValue + value * (maxValue - minValue))
-end
+end
+
+--change the color by the deltaTime
+function DF:LerpLinearColor (deltaTime, interpSpeed, r1, g1, b1, r2, g2, b2)
+	deltaTime = deltaTime * interpSpeed
+	local r = r1 + (r2 - r1) * deltaTime
+	local g = g1 + (g2 - g1) * deltaTime
+	local b = b1 + (b2 - b1) * deltaTime
+	return r, g, b
+end
+
+--check if a number is near another number by a tolerance
+function DF:IsNearlyEqual (value1, value2, tolerance)
+	tolerance = tolerance or SMALL_FLOAT
+	return abs (value1 - value2) <= tolerance
+end
+
+--check if a number is near zero
+function DF:IsNearlyZero (value, tolerance)
+	tolerance = tolerance or SMALL_FLOAT
+	return abs (value) <= tolerance
+end
+
+--check if a number is within a two other numbers, if isInclusive is true, it'll  include the max value
+function DF:IsWithin (minValue, maxValue, value, isInclusive)
+	if (isInclusive) then
+		return ((value >= minValue) and (value <= maxValue))	
+	else
+		return ((value >= minValue) and (value < maxValue))
+	end
+end
+
+--dont allow a number ot be lower or bigger than a certain range
+function DF:Clamp (minValue, maxValue, value)
+	return value < minValue and minValue or value < maxValue and value or maxValue
+end
+
+function DF:ScaleBack ()
+
+end