Legacy/Itween

Parameter Parsing Strings may be passed into the "Parameters" input on Simple, Expert, and Minimal iTween operations. Anatomy of an iTween Parameter Each parameter has four elements, from...

Parameter Parsing
Strings may be passed into the "Parameters" input on Simple, Expert, and Minimal iTween operations.

Anatomy of an iTween Parameter
Each parameter has four elements, from left to right: The key, the assignment operator (or equals sign), the value and the punctuation (or semicolon).
-The key tells the parser which variable in the iTweenEvent to change.
-The assignment operator tells the parser that the command part is finished.
-The input is what the variable will be changed to.
-The punctuation tells the parser that the value part is finished and this parameter is complete.

   Example: "name = New Tween; vectorFrom = this; vectorTo = (10, 50, 100); time = 3.5;"

Keys are case-insensitive and space-agnostic, so "name," "NAME," and "Na Me" will all have the same effect. Values are not case-insensitive, so names should be input with the actual capitalization you want. Numeric values like "float" and "vector" are space-agnostic, but lettered values are not, i.e. "name."

Punctuation at the end of the last parameter in a string is not required, but is considered a best practice.

Parser Arithmetic
For numeric values, arithmetic operations are not parsed with one exception: one single multiplication operation per value. This allows for vectors and rotators to be easily multiplied, but also works for floats and other numeric values.

Keywords
Consider that vectors, rotators, and vector2D keys can take lettered values such as "this," "current," "zero" and "one."

   Example: "vectorfrom = this * 2; vectorto = one * 5;"

In this example, the from vector will be the object's current location multiplied by 2 and the to vector will be (5,5,5).

"this" OR "current" will return the object's current vector, rotator, or vector2D.
"zero" will return (0,0,0) or (0,0) for vector2D.
"one" will return (1,1,1) or (1,1) for vector2D.
Parser Grammar
Vectors, Vector2Ds, Rotators, and Linear Colors can be written with parentheses (), braces {}, brackets [] or nothing at all as long as the values are separated by commas (,).

Converting these values to string through the engine is also allowed into the parser. For example, converting a vector (9,7,8) to string will produce "X=9 Y=7 Z=8". The parser will recognize these without issue.

Linear color values can be input as 0-to-1-based RGB vectors or one of the following named colors: black, blue, cyan, green, magenta, red, white, and yellow.

Object references can be set by FName. These object reference keys include onstarttarget, onticktarget, onlooptarget, oncompletetarget, and orientationtarget. Note that the custom curve used as an EaseType cannot be set through the parser.

Variables in the Parser
Variable names may not be passed as a value because they can not be parsed from a string. In Blueprints, best practice is to use the "Format Text" node and convert your variable into text (or in some cases to string then to text) then convert the "Format Text" node's output into a string. Readings from string conversions will be understood by the parser. For C++ users, best practice is as follows:

   ("vectorfrom = this; vectorto = " + vectorVariable.ToString() + "; time = 5")

Keys and Values
By default, the values listed below are listed in the order that they are evaluated by the parser.

Key Effect Alternative Keys Acceptable Values Example Default Value

name Sets the Tween's name. N/A Anything name = Super Tween 1!; ""

floatfrom Sets the "from" float for operations that use floats. Ex: UMG RT Rotate From/To, Float From/To ffrom 1 OR 1.0 OR 1f OR 1.f floatfrom = 65; ffrom = 4.5 * 2; 0

floatto Sets the "from" float for operations that use floats. Ex: UMG RT Rotate From/To, Float From/To fto 1 OR 1.0 OR 1f OR 1.f floatto = 7f; fto = 100.267f * 30; 0

coordinatespace Sets the space for the tween. Ex: world space, parent space, or self space cspace world, self, space coordinatespace = self; cspace = parent; world

vectorfrom Sets the "from" vector for operations that use vectors. Ex: Vector From/To, Actor Scale From/To vfrom zero: (0,0,0) one: (1,1,1) 2,2,2 OR [3,3,3] vectorfrom = (2,75,33); vfrom = one * 5; FVector(0,0,0)

vectorto Sets the "to" vector for operations that use vectors. Ex: Component Move From/To vto zero: (0,0,0) one: (1,1,1) X=20 Y=90 Z=100 vectorto = zero; vto = 8,0,8 * 2.65; FVector(0,0,0)

vector2dfrom Sets the "from" vector2D for operations that use vector2Ds. Ex: Vector2D From/To, UMG RT Scale From/To v2from zero: (0,0) one: (1,1) {4,4} OR (5,5) vector2dfrom = (2,75); v2from = one * 5; FVector2D(0,0)

vector2dto Sets the "to" vector2D for operations that use vector2Ds. Ex: UMG RT Move From/To v2to zero: (0,0) one: (1,1) X=20 Y=90 vector2dto = zero; v2to = 8,0 * 2.65; FVector2D(0,0)

rotatorfrom Sets the "from" rotator for operations that use rotators. Ex: Rotator From/To, Actor Rotate From/To rfrom zero: (0,0,0) one: (1,1,1) 2,2,2 OR [3,3,3] rotatorfrom = (2,75,33); rfrom = one * 5; FRotator(0,0,0)

rotatorto Sets the "to" rotator for operations that use rotators. Ex: Component Rotate From/To rto zero: (0,0,0) one: (1,1,1) R=20 P=90 Y=100 rotatorto = zero; rto = 8,0,8 * 2.65; FRotator(0,0,0)

linearcolorfrom Sets the "from" linear color for operations that use linear colors. Can accept some color names, an RGB vector (R,G,B) or an RGB vector with Alpha argument (R,G,B,A). Ex: Linear Color From/To linearcolourfrom colorfrom colourfrom cfrom OR lcfrom black, blue, cyan, green, magenta, red, white, yellow 1,0,1 [0.5,0.75,1,0.5] linearcolorfrom = (2,75,33); cfrom = white; FColor::Black

linearcolorto Sets the "to" linear color for operations that use linear colors. Can accept some color names, an RGB vector (R,G,B) or an RGB vector with Alpha argument (R,G,B,A). Ex: Linear Color From/To linearcolourto colorto colourto cto OR lcto black, blue, cyan, green, magenta, red, white, yellow {0.5,0.75,1,0.5} R=1 G=1 B=0 A=1 colorto = zero; lcto = yellow; FColor::Black

delaytype Sets when to wait for the delay parameter. First: Only delay before the tween begins First and After Each Loop Section (firstloop): Delay before the tween and after every looping rewind or switch between back-and-forth. First and After Each Full Loop (firstloopfull): Delay before the tween and after every looping rewind or back-and-forth set. After Each Loop Section (loop): Loop after every looping rewind or switch between back-and-forth only. After Each Full Loop (loopfull): Loop after every looping rewind or back-and-forth set only. dtype first OR firstloop OR firstloopfull OR loop OR loopfull delaytype = first; dtype = loopfull; DelayType::first

delay Sets the amount of time in seconds that the operation will wait before starting or looping, depending on the delaytype. N/A 1 OR 1.0 OR 1f OR 1.f delay = 3.5; delay = 4.5 * 2; 0

ticktype Sets whether to use speed or time in seconds for the tween's duration. Seconds: The ticktypevalue will be evaluated as literal time in seconds. Speed: The ticktypevalue will be evaluated as distance between from and to variables divided by the ticktypevalue divided by 100. ttype seconds OR speed ticktype = seconds; ttype = speed; TickType::seconds

ticktypevalue Sets the duration of the tween, whether that be in seconds or by speed. ttv 1 OR 1.0 OR 1f OR 1.f ticktypevalue = 3; ttv = 1.1 * 3; 5

speed Sets the ticktype to speed and sets the ticktypevalue to a literal float. Think of this as a shortcut. N/A 1 OR 1.0 OR 1f OR 1.f speed = 10; N/A

timeinseconds Sets the ticktype to seconds and sets the ticktypevalue to a literal float. Think of this as a shortcut. time 1 OR 1.0 OR 1f OR 1.f timeinseconds = 3; time = 1.0; N/A

punchamplitude Sets the amplitude by which the "punch" easetype will move. punch OR pamp 1 OR 1.0 OR 1f OR 1.f punchamplitude = 2; punch = 3; pamp = 4.2 * 4; 1

generatedpointdistance Sets the distance at which vertices will be generated for a procedural spline component from the point of origin. Distance is in unreal units. For example, a gpd of 100 will generate a vertex 100 UU away from the selected origin in the selected direction and add it to the spline. Used for spline operations. gpd 1 OR 1.0 OR 1f OR 1.f generatedpointdistance = 100; gpd = 50.f; 100

sweep Sets whether or not an actor will stop tweening when it collides with another object. Ex: Actor Move From/To N/A true OR false sweep = true; false

vectorconstraints Constrains an object's vector-based tween to the specified axis or axes. Ex: Actor Move From/To, Actor Scale From/To vconst no OR none x OR y OR z xy OR xz OR yz vectorconstraints = x; vconst = xy VectorConstraints::none

vector2dconstraints Constrains an object's vector2D-based tween to the specified axis or axes. Ex: UMG RT Move From/To, UMG RT Shear From/To v2const no OR none x OR y vector2dconstraints = x; v2const = y Vector2DConstraints::none

rotatorconstraints Constrains an object's rotator-based tween to the specified axis or axes. Ex: Component Rotate From/To rconst no OR none pitch OR yaw OR roll pitchyaw OR pitchroll OR yawroll rotatorconstraints = pitch; vconst = yawroll RotatorConstraints::none

looptype Sets whether to loop and how to loop. Once: The tween will not loop. Back-and-forth (pingpong/backandforth): The tween will arrive at its destination then move back toward its starting position and repeat. Rewind: The tween will keep playing over and over, start to finish. loop once OR backandforth OR pingpong OR rewind looptype = pingpong; loop = rewind; LoopType::once

orientation Specifies the look direction of a moving object. Ex: Actor Move From/To NoOrientationChange (no): The direction in which the object looks will not be changed by the tween. OrientToPath (path): The object will look in the direction it's traveling. OrientToTarget (target): The object will rotate to look at a specific target onscreen. looktype look no OR path OR target orientation = path; look = target LookType::noOrientationChange

orientationspeed Sets the speed at which the object will reach its orientation if orientation is set to "path" or "target." ospeed OR lookspeed 1 OR 1.0 OR 1f OR 1.f orientationspeed = 2; ospeed = 3; lookspeed = 4.2 * 4; 5

tickwhenpaused Sets whether or not an actor will continue to tween even with the built-in UE4 "Pause" function enabled. Leaving this option set to "false" will respect whatever setting is currently set for the object with regards to "Tick When Paused." Setting it to true will leave it set to true on the actor for now. Ex: Actor Move From/To, Component Rotate From/To twp true OR false tickwhenpaused = true; twp = true; false

ignoretimedilation If enabled, the tweening object will have a time dilation that is the inverse of the global dilation. This is useful for when you use global time dilation modulation for slowdown effects or for pausing but you want the tween to function normally. The original time dilation will be restored after the tween completes or is stopped. Ex: Actor Move From/To, Component Rotate From/To itd true OR false ignoretimedilation = true; itd = true; false

onstarttarget Sets the target to which the OnTweenStart interface message will be sent. Takes an object FName as a value. ontweenstarttarget OR ost object FName onstarttarget = My_Character; ost = Table; nullptr

onticktarget Sets the target to which the OnTweenTick and OnTweenDataTick interface messages will be sent. Takes an object FName as a value. ontweenticktarget OR ott object FName onticktarget = My_Character; ott = Table; nullptr

onlooptarget Sets the target to which the OnTweenLoop interface message will be sent. Takes an object FName as a value. ontweenlooptarget OR olt object FName onlooptarget = My_Character; olt = Table; nullptr

oncompletetarget Sets the target to which the OnTweenComplete interface message will be sent. Takes an object FName as a value. ontweencompletetarget OR oct object FName onlooptarget = My_Character; olt = Table; nullptr

orientationtarget If the LookType/orientation is set to "Orient To Target" then this will set that target to which the object will orient itself. Takes an object FName as a value. ot object FName orientationtarget = My_Character; ot = Table; nullptr

splinecomponent If performing a spline operation, you may use this key to specify a spline component by name. Takes an object FName as a value. spline object FName splinecomponent = SplineComponent1; spline = coilSpline; nullptr

interpolatetospline If performing a spline operation, sets whether or not the object will interpolate from its current position/rotation to the beginning of the spline position/rotation. If disabled, the object will snap to the start spline position/rotation. Ex: Actor Move To Spline Point, Component Rotate To Spline Point its true OR false interpolatetospline = true; its = true; false

switchpathorientationdirection If performing a spline operation and LoopType is pingpong/back-and-forth, this will determine whether or not the object will look back during its pong/back travel. Ex: Actor Move To Spline Point, Component Rotate To Spline Point its true OR false switchpathorientationdirection = false; spod = false; true

destroysplineobject If performing a spline operation, this will destroy the actor that contains the spline component used in the operation. This should only be used when creating procedural splines using GenerateSplineFromVectorArray or GenerateSplineFromRotatorArray. Ex: Actor Move To Spline Point, Component Rotate To Spline Point destroysplineobject OR destroyspline OR dso true OR false destroysplineobject = true; dso = true; false

shortestpath Will use find the shortest path between current rotation and the target rotation. Will avoid Gimbal Lock, but will not rotate more than is necessary to reach a rotation between 0 and 359 degrees. If disabled, 0 to 540 degrees will get you 3 full rotations; enabled will only get you one. Ex: Actor Rotate From/To, Component Rotate From/To short true OR false shortestpath = true; short = true; false

easetype Determines how the object will ease in or out of its tween. See table below for more information. ease see table below for easetype values easetype = easeinandoutback; ease = ioquad; EaseType::Linear

timerinterval Sets the interval, in seconds, at which the tween will update. 0 will make the tween operate on the tick function. Values greater or less than 0 will operate at the designated interval. You may add "fps" into the value to make the tween run at a fixed framerate. This works by setting timerInterval to 1 divided by the numerical value when "fps" is found in the value. interval OR ti 1 OR 1.0 OR 1f OR 1.f timerinterval = 0.5; interval = 30fps; ti = 0.016; 0

EaseTypes
With iTween, users can modulate the transform of their tweens to give them a different look. "In" refers to the beginning of the tween. "Out" refers to the end of the tween. "Ease In Quadratic" will produce a natural, slowed ease at the beginning of the tween and end more quickly. Try out different easetypes to get a feel for how they look. Generally, most users opt for "EaseInAndOutQuadratic" for single-motion tweens because it has the most natural look to it.
Values in this table are listed by the order that they are listed in the "EEaseType" enumeration.
Quadratic, Cubic, Quartic, Quintic, Circular, Sine and Exponential all perform the same type of animation more or less: a smooth push to the destination with a shorter or longer ease. Because of this, I will not be writing descriptions for them.
Note that the Elastic, Bounce, Back, Punch and Spring EaseTypes, also known as Out-Of-Bounds EaseTypes, do not currently work properly with spline operations. They won't cause crashes, but they won't look right because they work by running data through an equation. Splines only go from 0 to the specified spline "duration," so if the equation returns a negative number or a number greater than the spline's duration, the equation ends up clamped. This is being investigated for a fix, but as of now we have no announcements.

EaseType | Description | Acceptable Values | Curve

----------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------- | -----------

Linear | No modulation. 1:1 relationship between Lerped value and output value. | linear | Coming Soon

EaseInQuadratic | See above paragraph. | EaseInQuadratic OR iquad | Coming Soon

EaseOutQuadratic | See above paragraph. | EaseOutQuadratic OR oquad | Coming Soon

EaseInAndOutQuadratic | See above paragraph. | EaseInAndOutQuadratic OR ioquad | Coming Soon

EaseInCubic | See above paragraph. | EaseInCubic OR icubic | Coming Soon

EaseOutCubic | See above paragraph. | EaseOutCubic OR ocubic | Coming Soon

EaseInAndOutCubic | See above paragraph. | EaseInAndOutCubic OR iocubic | Coming Soon

EaseInQuartic | See above paragraph. | EaseInQuartic OR iquart | Coming Soon

EaseOutQuartic | See above paragraph. | EaseOutQuartic OR oquart | Coming Soon

EaseInAndOutQuartic | See above paragraph. | EaseInAndOutQuartic OR ioquart | Coming Soon

EaseInQuintic | See above paragraph. | EaseInQuintic OR iquint | Coming Soon

EaseOutQuintic | See above paragraph. | EaseOutQuintic OR oquint | Coming Soon

EaseInAndOutQuintic | See above paragraph. | EaseInAndOutQuintic OR ioquint | Coming Soon

EaseInSine | See above paragraph. | EaseInSine OR isine | Coming Soon

EaseOutSine | See above paragraph. | EaseOutSine OR osine | Coming Soon

EaseInAndOutSine | See above paragraph. | EaseInAndOutSine OR iosine | Coming Soon

EaseInExponential | See above paragraph. | EaseInExponential OR iexpo | Coming Soon

EaseOutExponential | See above paragraph. | EaseOutExponential OR oexpo | Coming Soon

EaseInAndOutExponential | See above paragraph. | EaseInAndOutExponential OR ioexpo | Coming Soon

EaseInCircular | See above paragraph. | EaseInCircular OR icirc | Coming Soon

EaseOutCircular | See above paragraph. | EaseOutCircular OR ocirc | Coming Soon

EaseInAndOutCircular | See above paragraph. | EaseInAndOutCircular OR iocirc | Coming Soon

EaseInBounce | The tween will act is if it's bouncing into place, but in reverse; the tween will seem to bounce out of its source transform. The opposite of EaseOutBounce. | EaseInBounce OR ibounce | Coming Soon

EaseOutBounce | The tween will appear to bounce like a ball as it hits its destination. | EaseOutBounce OR obounce | Coming Soon

EaseInAndOutBounce | The tween will appear to reverse bounce out of its source transform then land on its destination, again bouncing like a ball. | EaseInAndOutBounce OR iobounce | Coming Soon

EaseInBack | The tween winds up and softly moves to its destination. | EaseInBack OR iback | Coming Soon

EaseOutBack | The tween moves to its destination, overshoots, then comes back. | EaseOutBack OR oback | Coming Soon

EaseInAndOutBack | The tween winds up in anticipation and then moves toward its destination, but overshoots then comes back. | EaseInAndOutBack OR ioback | Coming Soon

EaseInElastic | The tween will appear to vibrate in an elastic manner Then push to its destination The opposite of EaseOutElastic. | EaseInElastic OR ielastic | Coming Soon

EaseOutElastic | The tween will push toward its destination then vibrate and fling as if it had landed in a rubber band. | EaseOutElastic OR oelastic | Coming Soon

EaseInAndOutElastic | The tween will vibrate in an elastic manner then fling to its destination and vibrate in the same manner again. | EaseInAndOutElastic OR ioelastic | Coming Soon

Punch | Pushes like one of the elastic tweens in the direction of the destination, but ends up back where it started. The degree of violence is affected by the punchAmplitude property. | punch | Coming Soon

Spring | A much softer version of EaseOutElastic. | spring | Coming Soon

CustomCurve | Select this EaseType to use a CurveFloat asset to drive the tween's easing. | curve | Coming Soon

iTween for UE4 Installer source
Form1.Designer.cs

   namespace iTweenForUE4Installer
   {
       partial class iTween
       {
           /// 

           /// Required designer variable.
           /// 

           private System.ComponentModel.IContainer components = null;
   
           /// 

           /// Clean up any resources being used.
           /// 

           /// ``true if managed resources should be disposed; otherwise, false.
           protected override void Dispose(bool disposing)
           {
               if (disposing && (components != null))
               {
                   components.Dispose();
               }
               base.Dispose(disposing);
           }
   
           #region Windows Form Designer generated code
   
           /// 

           /// Required method for Designer support - do not modify
           /// the contents of this method with the code editor.
           /// 

           private void InitializeComponent()
           {
               System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(iTween));
               this.lblVersion = new System.Windows.Forms.Label();
               this.rbnCPP = new System.Windows.Forms.RadioButton();
               this.rbnBlue = new System.Windows.Forms.RadioButton();
               this.btnInstall = new System.Windows.Forms.Button();
               this.folderBrowserDialog1 = new System.Windows.Forms.FolderBrowserDialog();
               this.txbPath = new System.Windows.Forms.TextBox();
               this.btnBrowse = new System.Windows.Forms.Button();
               this.lnkPixelPlacement = new System.Windows.Forms.LinkLabel();
               this.imgLogo = new System.Windows.Forms.PictureBox();
               this.lblDescription = new System.Windows.Forms.Label();
               this.lnkSweet = new System.Windows.Forms.LinkLabel();
               this.lblStatus = new System.Windows.Forms.Label();
               this.chkDebugMessages = new System.Windows.Forms.CheckBox();
               this.chkErrorMessages = new System.Windows.Forms.CheckBox();
               this.txtListLog = new System.Windows.Forms.TextBox();
               this.btnCopyLog = new System.Windows.Forms.Button();
               this.btnShowLog = new System.Windows.Forms.Button();
               this.lblLinkSeparator = new System.Windows.Forms.Label();
               this.btnUninstall = new System.Windows.Forms.Button();
               this.chkSaveLog = new System.Windows.Forms.CheckBox();
               ((System.ComponentModel.ISupportInitialize)(this.imgLogo)).BeginInit();
               this.SuspendLayout();
               // 
               // lblVersion
               // 
               this.lblVersion.AutoSize = true;
               this.lblVersion.Dock = System.Windows.Forms.DockStyle.Right;
               this.lblVersion.Location = new System.Drawing.Point(646, 0);
               this.lblVersion.Name = "lblVersion";
               this.lblVersion.Size = new System.Drawing.Size(103, 13);
               this.lblVersion.TabIndex = 0;
               this.lblVersion.Text = "iTween version here";
               this.lblVersion.TextAlign = System.Drawing.ContentAlignment.TopRight;
               // 
               // rbnCPP
               // 
               this.rbnCPP.AutoSize = true;
               this.rbnCPP.Location = new System.Drawing.Point(12, 94);
               this.rbnCPP.Name = "rbnCPP";
               this.rbnCPP.Size = new System.Drawing.Size(130, 17);
               this.rbnCPP.TabIndex = 2;
               this.rbnCPP.TabStop = true;
               this.rbnCPP.Text = "I\'m a C++ User or both";
               this.rbnCPP.UseVisualStyleBackColor = true;
               this.rbnCPP.Click += new System.EventHandler(this.SetStatusWaiting);
               // 
               // rbnBlue
               // 
               this.rbnBlue.AutoSize = true;
               this.rbnBlue.Location = new System.Drawing.Point(12, 71);
               this.rbnBlue.Name = "rbnBlue";
               this.rbnBlue.Size = new System.Drawing.Size(154, 17);
               this.rbnBlue.TabIndex = 1;
               this.rbnBlue.TabStop = true;
               this.rbnBlue.Text = "I\'m a Blueprinter exclusively";
               this.rbnBlue.UseVisualStyleBackColor = true;
               this.rbnBlue.Click += new System.EventHandler(this.SetStatusWaiting);
               // 
               // btnInstall
               // 
               this.btnInstall.Enabled = false;
               this.btnInstall.Location = new System.Drawing.Point(172, 71);
               this.btnInstall.Name = "btnInstall";
               this.btnInstall.Size = new System.Drawing.Size(59, 22);
               this.btnInstall.TabIndex = 3;
               this.btnInstall.Text = "Install";
               this.btnInstall.UseVisualStyleBackColor = true;
               this.btnInstall.MouseClick += new System.Windows.Forms.MouseEventHandler(this.btnInstall_Click);
               // 
               // folderBrowserDialog1
               // 
               this.folderBrowserDialog1.HelpRequest += new System.EventHandler(this.folderBrowserDialog1_HelpRequest);
               // 
               // txbPath
               // 
               this.txbPath.Location = new System.Drawing.Point(10, 166);
               this.txbPath.Name = "txbPath";
               this.txbPath.Size = new System.Drawing.Size(166, 20);
               this.txbPath.TabIndex = 4;
               this.txbPath.Text = "UE4 Project Path here...";
               this.txbPath.Click += new System.EventHandler(this.SetStatusWaiting);
               this.txbPath.TextChanged += new System.EventHandler(this.ValidatePath);
               // 
               // btnBrowse
               // 
               this.btnBrowse.Location = new System.Drawing.Point(180, 164);
               this.btnBrowse.Name = "btnBrowse";
               this.btnBrowse.Size = new System.Drawing.Size(51, 22);
               this.btnBrowse.TabIndex = 5;
               this.btnBrowse.Text = "Browse";
               this.btnBrowse.UseVisualStyleBackColor = true;
               this.btnBrowse.MouseClick += new System.Windows.Forms.MouseEventHandler(this.btnBrowse_Click);
               // 
               // lnkPixelPlacement
               // 
               this.lnkPixelPlacement.AutoSize = true;
               this.lnkPixelPlacement.Location = new System.Drawing.Point(82, 190);
               this.lnkPixelPlacement.Name = "lnkPixelPlacement";
               this.lnkPixelPlacement.Size = new System.Drawing.Size(79, 13);
               this.lnkPixelPlacement.TabIndex = 6;
               this.lnkPixelPlacement.TabStop = true;
               this.lnkPixelPlacement.Text = "PixelPlacement";
               this.lnkPixelPlacement.LinkClicked += new System.Windows.Forms.LinkLabelLinkClickedEventHandler(this.lnkPixelPlacement_Click);
               // 
               // imgLogo
               // 
               this.imgLogo.Location = new System.Drawing.Point(12, 1);
               this.imgLogo.Name = "imgLogo";
               this.imgLogo.Size = new System.Drawing.Size(64, 64);
               this.imgLogo.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;
               this.imgLogo.TabIndex = 7;
               this.imgLogo.TabStop = false;
               // 
               // lblDescription
               // 
               this.lblDescription.Location = new System.Drawing.Point(82, 23);
               this.lblDescription.Name = "lblDescription";
               this.lblDescription.Size = new System.Drawing.Size(160, 45);
               this.lblDescription.TabIndex = 8;
               this.lblDescription.Text = "Choose the path to your project containing a *.uproject file to enable the \"Insta" +
       "ll\" button!";
               // 
               // lnkSweet
               // 
               this.lnkSweet.AutoSize = true;
               this.lnkSweet.Location = new System.Drawing.Point(164, 190);
               this.lnkSweet.Name = "lnkSweet";
               this.lnkSweet.Size = new System.Drawing.Size(67, 13);
               this.lnkSweet.TabIndex = 9;
               this.lnkSweet.TabStop = true;
               this.lnkSweet.Text = "Sweet Team";
               this.lnkSweet.LinkClicked += new System.Windows.Forms.LinkLabelLinkClickedEventHandler(this.lnkSweet_Click);
               // 
               // lblStatus
               // 
               this.lblStatus.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)));
               this.lblStatus.AutoSize = true;
               this.lblStatus.Location = new System.Drawing.Point(348, 214);
               this.lblStatus.Name = "lblStatus";
               this.lblStatus.Size = new System.Drawing.Size(52, 13);
               this.lblStatus.TabIndex = 10;
               this.lblStatus.Text = "Waiting...";
               this.lblStatus.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
               // 
               // chkDebugMessages
               // 
               this.chkDebugMessages.AutoSize = true;
               this.chkDebugMessages.Location = new System.Drawing.Point(12, 118);
               this.chkDebugMessages.Name = "chkDebugMessages";
               this.chkDebugMessages.Size = new System.Drawing.Size(212, 17);
               this.chkDebugMessages.TabIndex = 11;
               this.chkDebugMessages.Text = "Print iTween Debug Messages in Editor";
               this.chkDebugMessages.UseVisualStyleBackColor = true;
               this.chkDebugMessages.CheckedChanged += new System.EventHandler(this.SetStatusWaiting);
               this.chkDebugMessages.CheckStateChanged += new System.EventHandler(this.SetStatusWaiting);
               this.chkDebugMessages.Click += new System.EventHandler(this.SetStatusWaiting);
               // 
               // chkErrorMessages
               // 
               this.chkErrorMessages.AutoSize = true;
               this.chkErrorMessages.Checked = true;
               this.chkErrorMessages.CheckState = System.Windows.Forms.CheckState.Checked;
               this.chkErrorMessages.Location = new System.Drawing.Point(12, 141);
               this.chkErrorMessages.Name = "chkErrorMessages";
               this.chkErrorMessages.Size = new System.Drawing.Size(202, 17);
               this.chkErrorMessages.TabIndex = 12;
               this.chkErrorMessages.Text = "Print iTween Error Messages in Editor";
               this.chkErrorMessages.UseVisualStyleBackColor = true;
               // 
               // txtListLog
               // 
               this.txtListLog.Location = new System.Drawing.Point(8, 237);
               this.txtListLog.Multiline = true;
               this.txtListLog.Name = "txtListLog";
               this.txtListLog.ReadOnly = true;
               this.txtListLog.ScrollBars = System.Windows.Forms.ScrollBars.Both;
               this.txtListLog.Size = new System.Drawing.Size(732, 159);
               this.txtListLog.TabIndex = 13;
               // 
               // btnCopyLog
               // 
               this.btnCopyLog.Location = new System.Drawing.Point(168, 209);
               this.btnCopyLog.Name = "btnCopyLog";
               this.btnCopyLog.Size = new System.Drawing.Size(63, 22);
               this.btnCopyLog.TabIndex = 14;
               this.btnCopyLog.Text = "Copy Log";
               this.btnCopyLog.UseVisualStyleBackColor = true;
               this.btnCopyLog.MouseClick += new System.Windows.Forms.MouseEventHandler(this.btnCopyLog_Click);
               // 
               // btnShowLog
               // 
               this.btnShowLog.Location = new System.Drawing.Point(8, 209);
               this.btnShowLog.Name = "btnShowLog";
               this.btnShowLog.Size = new System.Drawing.Size(66, 22);
               this.btnShowLog.TabIndex = 15;
               this.btnShowLog.Text = "Show Log";
               this.btnShowLog.UseVisualStyleBackColor = true;
               this.btnShowLog.MouseClick += new System.Windows.Forms.MouseEventHandler(this.btnShowLog_Click);
               // 
               // lblLinkSeparator
               // 
               this.lblLinkSeparator.AutoSize = true;
               this.lblLinkSeparator.Location = new System.Drawing.Point(158, 190);
               this.lblLinkSeparator.Name = "lblLinkSeparator";
               this.lblLinkSeparator.Size = new System.Drawing.Size(9, 13);
               this.lblLinkSeparator.TabIndex = 16;
               this.lblLinkSeparator.Text = "|";
               // 
               // btnUninstall
               // 
               this.btnUninstall.Enabled = false;
               this.btnUninstall.Location = new System.Drawing.Point(172, 94);
               this.btnUninstall.Name = "btnUninstall";
               this.btnUninstall.Size = new System.Drawing.Size(59, 22);
               this.btnUninstall.TabIndex = 17;
               this.btnUninstall.Text = "Uninstall";
               this.btnUninstall.UseVisualStyleBackColor = true;
               this.btnUninstall.Click += new System.EventHandler(this.btnUninstall_Click);
               // 
               // chkSaveLog
               // 
               this.chkSaveLog.AutoSize = true;
               this.chkSaveLog.Checked = true;
               this.chkSaveLog.CheckState = System.Windows.Forms.CheckState.Checked;
               this.chkSaveLog.Location = new System.Drawing.Point(10, 189);
               this.chkSaveLog.Name = "chkSaveLog";
               this.chkSaveLog.Size = new System.Drawing.Size(72, 17);
               this.chkSaveLog.TabIndex = 18;
               this.chkSaveLog.Text = "Save Log";
               this.chkSaveLog.UseVisualStyleBackColor = true;
               // 
               // iTween
               // 
               this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
               this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
               this.ClientSize = new System.Drawing.Size(749, 408);
               this.Controls.Add(this.chkSaveLog);
               this.Controls.Add(this.btnUninstall);
               this.Controls.Add(this.lblLinkSeparator);
               this.Controls.Add(this.btnShowLog);
               this.Controls.Add(this.btnCopyLog);
               this.Controls.Add(this.txtListLog);
               this.Controls.Add(this.chkErrorMessages);
               this.Controls.Add(this.chkDebugMessages);
               this.Controls.Add(this.lblStatus);
               this.Controls.Add(this.lnkSweet);
               this.Controls.Add(this.lblDescription);
               this.Controls.Add(this.imgLogo);
               this.Controls.Add(this.lnkPixelPlacement);
               this.Controls.Add(this.btnBrowse);
               this.Controls.Add(this.txbPath);
               this.Controls.Add(this.btnInstall);
               this.Controls.Add(this.rbnBlue);
               this.Controls.Add(this.rbnCPP);
               this.Controls.Add(this.lblVersion);
               this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedToolWindow;
               this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
               this.Name = "iTween";
               this.Text = "iTween for UE4 Installer";
               this.FormClosed += new System.Windows.Forms.FormClosedEventHandler(this.FormClose);
               this.Load += new System.EventHandler(this.iTween_Load);
               ((System.ComponentModel.ISupportInitialize)(this.imgLogo)).EndInit();
               this.ResumeLayout(false);
               this.PerformLayout();
   
           }
   
           #endregion
   
           private System.Windows.Forms.Label lblVersion;
           private System.Windows.Forms.RadioButton rbnCPP;
           private System.Windows.Forms.RadioButton rbnBlue;
           private System.Windows.Forms.Button btnInstall;
           private System.Windows.Forms.FolderBrowserDialog folderBrowserDialog1;
           private System.Windows.Forms.TextBox txbPath;
           private System.Windows.Forms.Button btnBrowse;
           private System.Windows.Forms.LinkLabel lnkPixelPlacement;
           private System.Windows.Forms.PictureBox imgLogo;
           private System.Windows.Forms.Label lblDescription;
           private System.Windows.Forms.LinkLabel lnkSweet;
           private System.Windows.Forms.Label lblStatus;
           private System.Windows.Forms.CheckBox chkDebugMessages;
           private System.Windows.Forms.CheckBox chkErrorMessages;
           private System.Windows.Forms.TextBox txtListLog;
           private System.Windows.Forms.Button btnCopyLog;
           private System.Windows.Forms.Button btnShowLog;
           private System.Windows.Forms.Label lblLinkSeparator;
           private System.Windows.Forms.Button btnUninstall;
           private System.Windows.Forms.CheckBox chkSaveLog;
       }
   }

Form1.cs

   using System;
   using System.Diagnostics;
   using System.Collections.Generic;
   using System.ComponentModel;
   using System.Data;
   using System.Drawing;
   using System.Linq;
   using System.Text;
   using System.Threading.Tasks;
   using System.Windows.Forms;
   using System.Windows;
   using System.IO;
   
   namespace iTweenForUE4Installer
   {
       public partial class iTween : Form
       {
           //Paths
           string iTweenUpluginPath = "iTween/iTween.uplugin";
           string imagePath = "iTween/Resources/Icon128.png";
           string projectName;
   
           string BPPath;
           string CPPPath;
   
           //URLs
           string urlPixelPlacement = "``";
           string urlSweet = "``!";
   
           //log
           List`` textLog = new List``();
   
           bool showLogState = false;
           int collapsedWidth = 258;
           int collapsedHeight = 274;
           int expandedWidth;
           int expandedHeight;
   
           public iTween()
           {
               InitializeComponent();
           }
   
           private void iTween_Load(object sender, EventArgs e)
           {
               expandedHeight = this.Height;
               expandedWidth = this.Width;
               this.Height = collapsedHeight;
               AddToListLog("Window height is " + this.Height.ToString());
               this.Width = collapsedWidth;
               AddToListLog("Window width is " + this.Width.ToString());
   
               lblStatus.Text = "Waiting...";
   
               //Set the logo image
               if (File.Exists(imagePath))
               {
                   imgLogo.Image = Image.FromFile(imagePath);
                   AddToListLog("iTween logo found.");
               }
               else
               {
                   imgLogo.Image = imgLogo.ErrorImage;
                   AddToListLog("iTween logo not found.");
               }
   
               //Set Blueprinter Radio Button checked
               rbnBlue.Checked = true;
   
               //Set version name (all this just for that! Ha.)
               if (File.Exists(iTweenUpluginPath))
               {
                   StreamReader sr = new StreamReader(iTweenUpluginPath);
                   string line;
                   string fileText = "";
                   int lineCount = 1;
                   string versionLine = "versionLine is null.";
                   while ((line = sr.ReadLine()) != null)
                   {
                       if (line.Contains("VersionName"))
                       {
                           versionLine = line;
                       }
                       fileText = fileText + lineCount.ToString() + " - " + line + "\n";
                       lineCount++;
                   }
                   versionLine = versionLine.Substring(versionLine.IndexOf(":") + 3);
                   versionLine = versionLine.Substring(0, versionLine.Length - 2);
                   lblVersion.Text = "Version " + versionLine;
                   AddToListLog("Version found in file '" + iTweenUpluginPath + "': " + lblVersion.Text);
               }
               else
               {
                   PrintMessage("This executable must be placed inside the root iTween folder to work. If it is in this folder, you may be missing 
   some files. Please unzip the source archive again and rerun this executable or install manually.");
                   AddToListLog("Incorrect installer configuration.");
               }
   
               if (File.Exists(Application.StartupPath + "\\InstallerPrefs.txt"))
               {
                   LoadPrefs();
               }
           }
   
           void PrintMessage(string message)
           {
               MessageBox.Show(message);
           }
   
           void LoadPrefs()
           {
               
               foreach (string s in File.ReadAllLines(Application.StartupPath + "\\InstallerPrefs.txt"))
               {
                   string[] entries;
                   string[] splitter = new string[] {"&=&"};
                   if (s.Contains("radioButton"))
                   {
                       entries = s.Split(splitter, StringSplitOptions.None);
   
                       if (entries.Contains("blue"))
                       {
                           rbnBlue.Checked = true;
                       }
                       else if (entries.Contains("cpp"))
                       {
                           rbnCPP.Checked = true;
                       }
                   }
                   else if (s.Contains("debugMessages"))
                   {
                       entries = s.Split(splitter, StringSplitOptions.None);
   
                       if (entries.Contains("true"))
                       {
                           chkDebugMessages.Checked = true;
                       }
                       else if (entries.Contains("false"))
                       {
                           chkDebugMessages.Checked = false;
                       }
                   }
                   else if (s.Contains("errorMessages"))
                   {
                       entries = s.Split(splitter, StringSplitOptions.None);
   
                       if (entries.Contains("true"))
                       {
                           chkErrorMessages.Checked = true;
                       }
                       else if (entries.Contains("false"))
                       {
                           chkErrorMessages.Checked = false;
                       }
                   }
                   else if (s.Contains("saveLog"))
                   {
                       entries = s.Split(splitter, StringSplitOptions.None);
   
                       if (entries.Contains("true"))
                       {
                           chkSaveLog.Checked = true;
                       }
                       else if (entries.Contains("false"))
                       {
                           chkSaveLog.Checked = false;
                       }
                   }
                   else if (s.Contains("lastPath"))
                   {
                       entries = s.Split(splitter, StringSplitOptions.None);
   
                       txbPath.Text = entries[entries.Length - 1];
                   }
               }
           }
   
           private void ValidatePath(object sender, EventArgs e)
           {
               if (Directory.Exists(txbPath.Text))
               {
                   string[] files = Directory.GetFiles(txbPath.Text, "*.uproject");
   
                   if (files.Length > 0)
                   {
                       while (txbPath.Text.Substring(txbPath.Text.Length - 1) == "\\")
                       {
                           txbPath.Text = txbPath.Text.Substring(0, txbPath.Text.Length - 1);
                       }
   
                       projectName = files[0].Substring(txbPath.Text.Length + 1, files[0].IndexOf(".uproject") - txbPath.Text.Length - 1);
                       AddToListLog("Project name: " + projectName);
   
                       btnInstall.Enabled = true;
   
                       BPPath = txbPath.Text + "\\Plugins\\iTween";
                       CPPPath = txbPath.Text + "\\Source\\" + projectName + "\\iTween";
   
`                       if (Directory.Exists(BPPath) && rbnBlue.Checked 

 Directory.Exists(CPPPath) && rbnCPP.Checked)                        {                            btnUninstall.Enabled = true;                        }                        else                        {                            btnUninstall.Enabled = false;                        }                    }                    else                    {                        btnInstall.Enabled = false;                        btnUninstall.Enabled = false;                    }                }                else                {                    btnInstall.Enabled = false;                    btnUninstall.Enabled = false;                }            }                private void DirectoryCopy(string sourceDirName, string destDirName, bool copySubDirs)            {                // Get the subdirectories for the specified directory.                DirectoryInfo dir = new DirectoryInfo(sourceDirName);                DirectoryInfo[] dirs = dir.GetDirectories();                    if (!dir.Exists)                {                    throw new DirectoryNotFoundException(                        "Source directory does not exist or could not be found: "                        + sourceDirName);                }                    // If the destination directory doesn't exist, create it.                 if (!Directory.Exists(destDirName))                {                    Directory.CreateDirectory(destDirName);                    AddToListLog("Created new directory at '" + destDirName + "'");                }                    // Get the files in the directory and copy them to the new location.                FileInfo[] files = dir.GetFiles();                foreach (FileInfo file in files)                {                    string temppath = Path.Combine(destDirName, file.Name);                    file.CopyTo(temppath, false);                    AddToListLog("Copied '" + file.Name + "' from '" + sourceDirName + "' to '" + destDirName + "'");                }                    // If copying subdirectories, copy them and their contents to new location.                 if (copySubDirs)                {                    foreach (DirectoryInfo subdir in dirs)                    {                        string temppath = Path.Combine(destDirName, subdir.Name);                        DirectoryCopy(subdir.FullName, temppath, copySubDirs);                    }                }            }                public void btnInstall_Click(object sender, MouseEventArgs e)            {                if (rbnBlue.Checked)                {                    AddToListLog("Installing for Blueprint as a plugin for " + projectName + "...");                    btnUninstall_Click(sender, e);                        lblStatus.Text = "Copying...";                    AddToListLog("Copying...");                        DirectoryCopy("iTween\", txbPath.Text + "\Plugins\iTween", true);                        lblStatus.Text = "Done!";                    AddToListLog("Done!");                }                 else if (rbnCPP.Checked)                {                    AddToListLog("Installing for C++ user or both to " + projectName + "'s source folder...");                    btnUninstall_Click(sender, e);                        lblStatus.Text = "Copying...";                    AddToListLog("Copying...");                        DirectoryCopy("iTween\Source\iTween\Private\", txbPath.Text + "\Source\" + projectName + "\iTween", true);                        lblStatus.Text = "Fixing...";                        LocalizeSourceFiles();                        lblStatus.Text = "Done!";                    AddToListLog("Done!");                }                    ValidatePath(sender, e);            }                private void LocalizeSourceFiles()            {                string sourcePath = txbPath.Text + "\Source\" + projectName + "\iTween\";                string insertInclude = "#include \"" + projectName + ".h\"";                string insertAPI = projectName.ToUpper() + "_API";                    string[] sourceFiles = Directory.GetFiles(sourcePath, ".cpp");                string[] headerFiles = Directory.GetFiles(sourcePath, ".h");                    //Source files                AddToListLog("Editing iTween source files...");                foreach (string s in sourceFiles)                {                    if (File.Exists(s))                    {                        List textLines = new List();                        foreach (string lines in File.ReadAllLines(s))                        {                            textLines.Add(lines);                        }                        textLines.Insert(textLines.IndexOf("#include \"iTweenPCH.h\""), insertInclude);                        AddToListLog("Added " + "'#include \"" + projectName + ".h\"'" + " to '" + s + "' at line " + (textLines.IndexOf("#include     \"iTweenPCH.h\"") - 1).ToString());                            File.Delete(s);                        File.WriteAllLines(s, textLines.ToArray());                    }                }                    //Header files                AddToListLog("Editing iTween header files...");                foreach (string s in headerFiles)                {                    if (File.Exists(s))                    {                        List textLines = new List();                        foreach (string lines in File.ReadAllLines(s))                        {                            textLines.Add(lines);                        }                        for (int i = 0; i

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