[added] math.lerp_eps and matching vec2/vec3 methods; for ensuring a lerp actually reaches its destination once the delta doesn't matter

math.lua

@@ -55,6 +55,16 @@ function _math.lerp(a, b, t)
 	return a * (1.0 - t) + b * t
 end
 
+--linear interpolation with a minimum "final step" distance
+--useful for making sure dynamic lerps do actually reach their final destination
+function _math.lerp_eps(a, b, t, eps)
+	local v = math.lerp(a, b, t)
+	if math.abs(v - b) < eps then
+		v = b
+	end
+	return v
+end
+
 --classic smoothstep
 --(only "safe" for 0-1 range)
 function _math.smoothstep(v)

vec2.lua

@@ -484,6 +484,16 @@ function vec2:lerp(other, amount)
 	return self:copy():lerpi(other, amount)
 end
 
+function vec2:lerp_epsi(other, amount, eps)
+	self.x = math.lerp_eps(self.x, other.x, amount, eps)
+	self.y = math.lerp_eps(self.y, other.y, amount, eps)
+	return self
+end
+
+function vec2:lerp_eps(other, amount, eps)
+	return self:copy():lerp_epsi(other, amount, eps)
+end
+
 -----------------------------------------------------------
 -- vector products and projections
 -----------------------------------------------------------

vec3.lua

@@ -556,6 +556,17 @@ function vec3:lerp(other, amount)
 	return self:copy():lerpi(other, amount)
 end
 
+function vec3:lerp_epsi(other, amount, eps)
+	self.x = math.lerp_eps(self.x, other.x, amount, eps)
+	self.y = math.lerp_eps(self.y, other.y, amount, eps)
+	self.z = math.lerp_eps(self.z, other.z, amount, eps)
+	return self
+end
+
+function vec3:lerp_eps(other, amount, eps)
+	return self:copy():lerp_epsi(other, amount, eps)
+end
+
 -----------------------------------------------------------
 -- vector products and projections
 -----------------------------------------------------------