Ok, I have made a thing. It might have been made before by others, but at least I never found it.
This recreate some functionality I have been missing from 3Ds Max, and which the OP also seem to need, where you can constrain movement in the editor to only one axis, even when snapping to vertices and such. It is an Overlay script with a new element that goes along. And so it NEEDS to be placed in folder called “Editor” (Filename: AxisConstrainOverlay.cs).
To activate it you as you do with other scene overlay tools: Three dots->Overlay Menu->Axis Constrain
It’s a toggle and dropdown in one, and can be activated and deactived by clicking the name, and the axis chosen by clicking the arrow. Also F5, F6 and F7 changes the axis (And if held down while the tool is deactive, it will activate until key up)
Anyways. Fun to make, learned something new. Some hacks in it (Don’t mention the icon creation!!!), but otherwise pretty robust. Probably did something backwards, but it is what it is 
using System.Collections.Generic;
using UnityEngine;
using UnityEditor.Toolbars;
using UnityEditor.Overlays;
using UnityEngine.UIElements;
using UnityEditor;
[Overlay(typeof(SceneView), "AxisConstrain", "Axis Constrain", true)]
public class AxisConstrainOverlay : ToolbarOverlay
{
public static Dictionary<Transform, Vector3> initPositions = new Dictionary<Transform, Vector3>();
public static Texture2D icon;
AxisConstrainOverlay() : base(
AxisDropDown.id
)
{
icon = Icon();
collapsedIcon = icon;
}
public static Texture2D Icon ()
{
//Build the icon to prevent needing an asset for it. Oh well...
Color[] txColor = new Color[256];
txColor[0] = new Color(1f, 1f, 1f, 0f);
txColor[1] = new Color(1f, 1f, 1f, 0f);
txColor[2] = new Color(1f, 1f, 1f, 0f);
txColor[3] = new Color(1f, 1f, 1f, 0f);
txColor[4] = new Color(1f, 1f, 1f, 0f);
txColor[5] = new Color(1f, 1f, 1f, 0f);
txColor[6] = new Color(1f, 1f, 1f, 0f);
txColor[7] = new Color(1f, 1f, 1f, 0f);
txColor[8] = new Color(1f, 1f, 1f, 0f);
txColor[9] = new Color(1f, 1f, 1f, 0f);
txColor[10] = new Color(1f, 1f, 1f, 0f);
txColor[11] = new Color(1f, 1f, 1f, 0f);
txColor[12] = new Color(1f, 1f, 1f, 0f);
txColor[13] = new Color(1f, 1f, 1f, 0f);
txColor[14] = new Color(1f, 1f, 1f, 0f);
txColor[15] = new Color(1f, 1f, 1f, 0f);
txColor[16] = new Color(1f, 1f, 1f, 0f);
txColor[17] = new Color(1f, 1f, 1f, 0f);
txColor[18] = new Color(1f, 1f, 1f, 0f);
txColor[19] = new Color(1f, 1f, 1f, 0f);
txColor[20] = new Color(1f, 1f, 1f, 0f);
txColor[21] = new Color(1f, 1f, 1f, 0f);
txColor[22] = new Color(1f, 1f, 1f, 0f);
txColor[23] = new Color(1f, 1f, 1f, 0f);
txColor[24] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[25] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[26] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[27] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[28] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[29] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[30] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[31] = new Color(1f, 1f, 1f, 0f);
txColor[32] = new Color(1f, 1f, 1f, 0f);
txColor[33] = new Color(1f, 1f, 1f, 0f);
txColor[34] = new Color(1f, 1f, 1f, 0f);
txColor[35] = new Color(1f, 1f, 1f, 0f);
txColor[36] = new Color(1f, 1f, 1f, 0f);
txColor[37] = new Color(1f, 1f, 1f, 0f);
txColor[38] = new Color(1f, 1f, 1f, 0f);
txColor[39] = new Color(1f, 1f, 1f, 0f);
txColor[40] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[41] = new Color(1f, 0.4313726f, 0.2509804f, 0f);
txColor[42] = new Color(1f, 0.4313726f, 0.2509804f, 0f);
txColor[43] = new Color(1f, 0.4313726f, 0.2509804f, 0f);
txColor[44] = new Color(1f, 0.4313726f, 0.2509804f, 0f);
txColor[45] = new Color(1f, 0.4313726f, 0.2509804f, 0f);
txColor[46] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[47] = new Color(1f, 1f, 1f, 0f);
txColor[48] = new Color(1f, 1f, 1f, 0f);
txColor[49] = new Color(1f, 1f, 1f, 0f);
txColor[50] = new Color(1f, 1f, 1f, 0f);
txColor[51] = new Color(1f, 1f, 1f, 0f);
txColor[52] = new Color(1f, 1f, 1f, 0f);
txColor[53] = new Color(1f, 1f, 1f, 0f);
txColor[54] = new Color(1f, 1f, 1f, 0f);
txColor[55] = new Color(1f, 1f, 1f, 0f);
txColor[56] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[57] = new Color(1f, 0.4313726f, 0.2509804f, 0f);
txColor[58] = new Color(1f, 1f, 1f, 0.03921569f);
txColor[59] = new Color(1f, 1f, 1f, 0.6078432f);
txColor[60] = new Color(1f, 1f, 1f, 0.8352942f);
txColor[61] = new Color(1f, 0.4313726f, 0.2509804f, 0f);
txColor[62] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[63] = new Color(1f, 1f, 1f, 0f);
txColor[64] = new Color(1f, 1f, 1f, 0f);
txColor[65] = new Color(1f, 1f, 1f, 0.2941177f);
txColor[66] = new Color(1f, 1f, 1f, 0.1960784f);
txColor[67] = new Color(1f, 1f, 1f, 0f);
txColor[68] = new Color(1f, 1f, 1f, 0f);
txColor[69] = new Color(1f, 1f, 1f, 0f);
txColor[70] = new Color(1f, 1f, 1f, 0f);
txColor[71] = new Color(1f, 1f, 1f, 0f);
txColor[72] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[73] = new Color(1f, 1f, 1f, 0.1960784f);
txColor[74] = new Color(1f, 1f, 1f, 0.8470589f);
txColor[75] = new Color(1f, 1f, 1f, 0.5882353f);
txColor[76] = new Color(1f, 1f, 1f, 0.03921569f);
txColor[77] = new Color(1f, 0.4313726f, 0.2509804f, 0f);
txColor[78] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[79] = new Color(1f, 1f, 1f, 0f);
txColor[80] = new Color(1f, 1f, 1f, 0f);
txColor[81] = new Color(1f, 1f, 1f, 0.282353f);
txColor[82] = new Color(1f, 1f, 1f, 0.854902f);
txColor[83] = new Color(1f, 1f, 1f, 0.7607844f);
txColor[84] = new Color(1f, 1f, 1f, 0.3333333f);
txColor[85] = new Color(1f, 1f, 1f, 0.01568628f);
txColor[86] = new Color(1f, 1f, 1f, 0f);
txColor[87] = new Color(1f, 1f, 1f, 0.003921569f);
txColor[88] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[89] = new Color(1f, 1f, 1f, 0.8980393f);
txColor[90] = new Color(1f, 1f, 1f, 0.3058824f);
txColor[91] = new Color(1f, 0.4313726f, 0.2509804f, 0f);
txColor[92] = new Color(1f, 0.4313726f, 0.2509804f, 0f);
txColor[93] = new Color(1f, 0.4313726f, 0.2509804f, 0f);
txColor[94] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[95] = new Color(1f, 1f, 1f, 0f);
txColor[96] = new Color(1f, 1f, 1f, 0f);
txColor[97] = new Color(1f, 1f, 1f, 0f);
txColor[98] = new Color(1f, 1f, 1f, 0.007843138f);
txColor[99] = new Color(1f, 1f, 1f, 0.2941177f);
txColor[100] = new Color(1f, 1f, 1f, 0.7254902f);
txColor[101] = new Color(1f, 1f, 1f, 0.8862746f);
txColor[102] = new Color(1f, 1f, 1f, 0.4784314f);
txColor[103] = new Color(1f, 1f, 1f, 0.7333333f);
txColor[104] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[105] = new Color(1f, 1f, 1f, 0.1019608f);
txColor[106] = new Color(1f, 0.4313726f, 0.2509804f, 0f);
txColor[107] = new Color(1f, 0.4313726f, 0.2509804f, 0f);
txColor[108] = new Color(1f, 0.4313726f, 0.2509804f, 0f);
txColor[109] = new Color(1f, 0.4313726f, 0.2509804f, 0f);
txColor[110] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[111] = new Color(1f, 1f, 1f, 0f);
txColor[112] = new Color(1f, 1f, 1f, 0f);
txColor[113] = new Color(1f, 1f, 1f, 0f);
txColor[114] = new Color(1f, 1f, 1f, 0f);
txColor[115] = new Color(1f, 1f, 1f, 0f);
txColor[116] = new Color(1f, 1f, 1f, 0f);
txColor[117] = new Color(1f, 1f, 1f, 0.1568628f);
txColor[118] = new Color(1f, 1f, 1f, 0.5490196f);
txColor[119] = new Color(1f, 1f, 1f, 0.937255f);
txColor[120] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[121] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[122] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[123] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[124] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[125] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[126] = new Color(1f, 0.4313726f, 0.2509804f, 1f);
txColor[127] = new Color(1f, 1f, 1f, 0f);
txColor[128] = new Color(1f, 1f, 1f, 0f);
txColor[129] = new Color(1f, 1f, 1f, 0f);
txColor[130] = new Color(1f, 1f, 1f, 0f);
txColor[131] = new Color(1f, 1f, 1f, 0f);
txColor[132] = new Color(1f, 1f, 1f, 0f);
txColor[133] = new Color(1f, 1f, 1f, 0f);
txColor[134] = new Color(1f, 1f, 1f, 0.05882353f);
txColor[135] = new Color(1f, 1f, 1f, 0.9411765f);
txColor[136] = new Color(1f, 1f, 1f, 0f);
txColor[137] = new Color(1f, 1f, 1f, 0f);
txColor[138] = new Color(1f, 1f, 1f, 0f);
txColor[139] = new Color(1f, 1f, 1f, 0f);
txColor[140] = new Color(1f, 1f, 1f, 0f);
txColor[141] = new Color(1f, 1f, 1f, 0f);
txColor[142] = new Color(1f, 1f, 1f, 0f);
txColor[143] = new Color(1f, 1f, 1f, 0f);
txColor[144] = new Color(1f, 1f, 1f, 0f);
txColor[145] = new Color(1f, 1f, 1f, 0f);
txColor[146] = new Color(1f, 1f, 1f, 0f);
txColor[147] = new Color(1f, 1f, 1f, 0f);
txColor[148] = new Color(1f, 1f, 1f, 0f);
txColor[149] = new Color(1f, 1f, 1f, 0f);
txColor[150] = new Color(1f, 1f, 1f, 0.05882353f);
txColor[151] = new Color(1f, 1f, 1f, 0.9411765f);
txColor[152] = new Color(1f, 1f, 1f, 0f);
txColor[153] = new Color(1f, 1f, 1f, 0f);
txColor[154] = new Color(1f, 1f, 1f, 0f);
txColor[155] = new Color(1f, 1f, 1f, 0f);
txColor[156] = new Color(1f, 1f, 1f, 0f);
txColor[157] = new Color(1f, 1f, 1f, 0f);
txColor[158] = new Color(1f, 1f, 1f, 0f);
txColor[159] = new Color(1f, 1f, 1f, 0f);
txColor[160] = new Color(1f, 1f, 1f, 0f);
txColor[161] = new Color(1f, 1f, 1f, 0f);
txColor[162] = new Color(1f, 1f, 1f, 0f);
txColor[163] = new Color(1f, 1f, 1f, 0f);
txColor[164] = new Color(1f, 1f, 1f, 0f);
txColor[165] = new Color(1f, 1f, 1f, 0f);
txColor[166] = new Color(1f, 1f, 1f, 0.05882353f);
txColor[167] = new Color(1f, 1f, 1f, 0.9411765f);
txColor[168] = new Color(1f, 1f, 1f, 0f);
txColor[169] = new Color(1f, 1f, 1f, 0f);
txColor[170] = new Color(1f, 1f, 1f, 0f);
txColor[171] = new Color(1f, 1f, 1f, 0f);
txColor[172] = new Color(1f, 1f, 1f, 0f);
txColor[173] = new Color(1f, 1f, 1f, 0f);
txColor[174] = new Color(1f, 1f, 1f, 0f);
txColor[175] = new Color(1f, 1f, 1f, 0f);
txColor[176] = new Color(1f, 1f, 1f, 0f);
txColor[177] = new Color(1f, 1f, 1f, 0f);
txColor[178] = new Color(1f, 1f, 1f, 0f);
txColor[179] = new Color(1f, 1f, 1f, 0f);
txColor[180] = new Color(1f, 1f, 1f, 0f);
txColor[181] = new Color(1f, 1f, 1f, 0f);
txColor[182] = new Color(1f, 1f, 1f, 0.05882353f);
txColor[183] = new Color(1f, 1f, 1f, 0.9411765f);
txColor[184] = new Color(1f, 1f, 1f, 0f);
txColor[185] = new Color(1f, 1f, 1f, 0f);
txColor[186] = new Color(1f, 1f, 1f, 0f);
txColor[187] = new Color(1f, 1f, 1f, 0f);
txColor[188] = new Color(1f, 1f, 1f, 0f);
txColor[189] = new Color(1f, 1f, 1f, 0f);
txColor[190] = new Color(1f, 1f, 1f, 0f);
txColor[191] = new Color(1f, 1f, 1f, 0f);
txColor[192] = new Color(1f, 1f, 1f, 0f);
txColor[193] = new Color(1f, 1f, 1f, 0f);
txColor[194] = new Color(1f, 1f, 1f, 0f);
txColor[195] = new Color(1f, 1f, 1f, 0f);
txColor[196] = new Color(1f, 1f, 1f, 0f);
txColor[197] = new Color(1f, 1f, 1f, 0f);
txColor[198] = new Color(1f, 1f, 1f, 0.05882353f);
txColor[199] = new Color(1f, 1f, 1f, 0.9411765f);
txColor[200] = new Color(1f, 1f, 1f, 0f);
txColor[201] = new Color(1f, 1f, 1f, 0f);
txColor[202] = new Color(1f, 1f, 1f, 0f);
txColor[203] = new Color(1f, 1f, 1f, 0f);
txColor[204] = new Color(1f, 1f, 1f, 0f);
txColor[205] = new Color(1f, 1f, 1f, 0f);
txColor[206] = new Color(1f, 1f, 1f, 0f);
txColor[207] = new Color(1f, 1f, 1f, 0f);
txColor[208] = new Color(1f, 1f, 1f, 0f);
txColor[209] = new Color(1f, 1f, 1f, 0f);
txColor[210] = new Color(1f, 1f, 1f, 0f);
txColor[211] = new Color(1f, 1f, 1f, 0f);
txColor[212] = new Color(1f, 1f, 1f, 0f);
txColor[213] = new Color(1f, 1f, 1f, 0f);
txColor[214] = new Color(1f, 1f, 1f, 0.05882353f);
txColor[215] = new Color(1f, 1f, 1f, 0.9411765f);
txColor[216] = new Color(1f, 1f, 1f, 0f);
txColor[217] = new Color(1f, 1f, 1f, 0f);
txColor[218] = new Color(1f, 1f, 1f, 0f);
txColor[219] = new Color(1f, 1f, 1f, 0f);
txColor[220] = new Color(1f, 1f, 1f, 0f);
txColor[221] = new Color(1f, 1f, 1f, 0f);
txColor[222] = new Color(1f, 1f, 1f, 0f);
txColor[223] = new Color(1f, 1f, 1f, 0f);
txColor[224] = new Color(1f, 1f, 1f, 0f);
txColor[225] = new Color(1f, 1f, 1f, 0f);
txColor[226] = new Color(1f, 1f, 1f, 0f);
txColor[227] = new Color(1f, 1f, 1f, 0f);
txColor[228] = new Color(1f, 1f, 1f, 0f);
txColor[229] = new Color(1f, 1f, 1f, 0f);
txColor[230] = new Color(1f, 1f, 1f, 0.03137255f);
txColor[231] = new Color(1f, 1f, 1f, 0.4705883f);
txColor[232] = new Color(1f, 1f, 1f, 0f);
txColor[233] = new Color(1f, 1f, 1f, 0f);
txColor[234] = new Color(1f, 1f, 1f, 0f);
txColor[235] = new Color(1f, 1f, 1f, 0f);
txColor[236] = new Color(1f, 1f, 1f, 0f);
txColor[237] = new Color(1f, 1f, 1f, 0f);
txColor[238] = new Color(1f, 1f, 1f, 0f);
txColor[239] = new Color(1f, 1f, 1f, 0f);
txColor[240] = new Color(1f, 1f, 1f, 0f);
txColor[241] = new Color(1f, 1f, 1f, 0f);
txColor[242] = new Color(1f, 1f, 1f, 0f);
txColor[243] = new Color(1f, 1f, 1f, 0f);
txColor[244] = new Color(1f, 1f, 1f, 0f);
txColor[245] = new Color(1f, 1f, 1f, 0f);
txColor[246] = new Color(1f, 1f, 1f, 0f);
txColor[247] = new Color(1f, 1f, 1f, 0f);
txColor[248] = new Color(1f, 1f, 1f, 0f);
txColor[249] = new Color(1f, 1f, 1f, 0f);
txColor[250] = new Color(1f, 1f, 1f, 0f);
txColor[251] = new Color(1f, 1f, 1f, 0f);
txColor[252] = new Color(1f, 1f, 1f, 0f);
txColor[253] = new Color(1f, 1f, 1f, 0f);
txColor[254] = new Color(1f, 1f, 1f, 0f);
txColor[255] = new Color(1f, 1f, 1f, 0f);
Texture2D iconTx = new Texture2D(16, 16, TextureFormat.ARGB32, false);
iconTx.filterMode = FilterMode.Point;
iconTx.wrapMode = TextureWrapMode.Clamp;
iconTx.SetPixels(txColor);
iconTx.Apply();
return iconTx;
}
}
[EditorToolbarElement(id, typeof(SceneView))]
class AxisDropDown : EditorToolbarDropdownToggle, IAccessContainerWindow
{
public const string id = "AxisConstrain/Axis";
public EditorWindow containerWindow { get; set; }
public bool constrainActive;
static int axisIndex = 0;
static readonly string[] axisName = new string[] { "x", "y", "z" };
UndoPropertyModification[] changedMods = null;
static readonly Color[] btnColors = new Color[] { new Color(0.3686275f, 0.1254902f, 0.1341253f), new Color(0.162876f, 0.3679245f, 0.126691f), new Color(0.1460929f, 0.19f, 0.4622641f) };
bool preConstrainActive;
bool down;
public AxisDropDown()
{
//Load some values from registry to make tool persistent in editor load instances.
SetActive(EditorPrefs.GetBool("AxisConstrainActive", false), EditorPrefs.GetInt("AxisConstrainAxis", 0));
//Subscribe the dropdown function
dropdownClicked += ShowMenu;
//Subscribe the toggle click
this.RegisterValueChangedCallback(SetConstrain);
//Subscribe to scene view changes
SceneView.duringSceneGui -= ConstrainPositions;
SceneView.duringSceneGui += ConstrainPositions;
icon = AxisConstrainOverlay.icon;
}
void ConstrainPositions(SceneView view)
{
//Only run when visible
if (containerWindow != null && containerWindow.TryGetOverlay("AxisConstrain", out Overlay result))
{
if (!result.displayed)
{
SceneView.duringSceneGui -= ConstrainPositions;
ObjectChangeEvents.changesPublished -= ObjectChangeEventsHandler;
Undo.postprocessModifications -= PostprocessModifications;
return;
}
}
if (view != containerWindow)
{
return;
}
if (constrainActive)
{
//Convert curretn rotation handle to its matrix form, so we can grab an axis
Matrix4x4 handleOrientation = Matrix4x4.TRS(Vector3.zero, Tools.handleRotation, Vector3.one);
Vector3 compareAxis = handleOrientation.GetColumn(axisIndex).normalized;
//Do to rounding errors in floats, constraining with initial value before moving is best.
foreach (KeyValuePair<Transform, Vector3> entry in AxisConstrainOverlay.initPositions)
{
//Delta vector of current local position vs initial local position when action started
Vector3 moveVector = entry.Key.localPosition - entry.Value;
if (entry.Key.parent != null)
{
//The changed property is in local coordinates. Transform to world using parent
moveVector = entry.Key.parent.localToWorldMatrix.MultiplyPoint3x4(moveVector) - entry.Key.parent.position;
}
//Project the delta vector on to the constrain axis (In world space)
Vector3 modMoveVector = Vector3.Project(moveVector, compareAxis);
//Offset the transform by how the projected vector differs from the delta vector
entry.Key.position += modMoveVector - moveVector;
}
}
if (Event.current != null)
{
if (Event.current.type == EventType.MouseUp)
{
//Clear all init positions on MouseUp, to prepare for next move action
AxisConstrainOverlay.initPositions.Clear();
}
else if (Event.current.type == EventType.KeyDown && !down)
{
preConstrainActive = constrainActive;
if (Event.current.keyCode == KeyCode.F5)
{
down = true;
SetActive(true, 0);
}
else if (Event.current.keyCode == KeyCode.F6)
{
down = true;
SetActive(true, 1);
}
else if (Event.current.keyCode == KeyCode.F7)
{
down = true;
SetActive(true, 2);
}
}
else if (Event.current.type == EventType.KeyUp && down)
{
if (Event.current.keyCode == KeyCode.F5)
{
down = false;
SetActive(preConstrainActive, 0);
}
else if (Event.current.keyCode == KeyCode.F6)
{
down = false;
SetActive(preConstrainActive, 1);
}
else if (Event.current.keyCode == KeyCode.F7)
{
down = false;
SetActive(preConstrainActive, 2);
}
}
}
}
void SetConstrain(ChangeEvent<bool> toggle)
{
//Save toggle state in both var and registry and appearance
SetActive(toggle.newValue, axisIndex);
}
public UndoPropertyModification[] PostprocessModifications(UndoPropertyModification[] modifications)
{
//Save this undo event to make sure we have the initial values of the objects being moved
changedMods = modifications;
return modifications;
}
public void ObjectChangeEventsHandler(ref ObjectChangeEventStream stream)
{
int changes = stream.length;
for (int i = 0; i < changes && changedMods != null && changedMods.Length > 0; i++)
{
//Find the "kind" of change i
ObjectChangeKind changeKind = stream.GetEventType(i);
if (changeKind == ObjectChangeKind.ChangeGameObjectOrComponentProperties)
{
//"Kind" is the one we are looking for: Component changes.
//Grab the data of this change
stream.GetChangeGameObjectOrComponentPropertiesEvent(i, out ChangeGameObjectOrComponentPropertiesEventArgs data);
//Get the Object of this change based on instanceID
Object instance = EditorUtility.InstanceIDToObject(data.instanceId);
if (instance is Transform)
{
//Changed object is of type: Transform
Transform changedTransform = instance as Transform;
//Check if we have this object stored already!
if (!AxisConstrainOverlay.initPositions.ContainsKey(changedTransform))
{
//Create and initialize initPos with local positions of changed transform (So that components of the Vector3 localPosition that are NOT changed are still saved)
Vector3 initPos;
initPos = changedTransform.localPosition;
//Loop through undo ops and find one that matches this change
for (int j = 0; j < changedMods.Length; j++)
{
UndoPropertyModification currentMod = changedMods[j];
if (currentMod.previousValue.target == changedTransform)
{
if (float.TryParse(currentMod.previousValue.value, out float valueAsFloat))
{
//Value is a float. Find the vector component by the property path
if (currentMod.previousValue.propertyPath == "m_LocalPosition.x")
{
initPos.x = valueAsFloat;
}
else if (currentMod.previousValue.propertyPath == "m_LocalPosition.y")
{
initPos.y = valueAsFloat;
}
else if (currentMod.previousValue.propertyPath == "m_LocalPosition.z")
{
initPos.z = valueAsFloat;
}
}
}
}
//Store init value in dict.
AxisConstrainOverlay.initPositions.Add(changedTransform, initPos);
}
}
}
}
}
void ShowMenu()
{
//Create and show drop down of toggle element. Add actions on value change
GenericMenu menu = new GenericMenu();
menu.AddItem(new GUIContent("x-axis"), axisIndex == 0, () => { SetActive(true, 0); });
menu.AddItem(new GUIContent("y-axis"), axisIndex == 1, () => { SetActive(true, 1); });
menu.AddItem(new GUIContent("z-axis"), axisIndex == 2, () => { SetActive(true, 2); });
menu.ShowAsContext();
}
void SetActive (bool active, int axis)
{
constrainActive = active;
EditorPrefs.SetBool("AxisConstrainActive", constrainActive);
SetValueWithoutNotify(constrainActive);
axisIndex = axis;
EditorPrefs.SetInt("AxisConstrainAxis", axisIndex);
SetText();
ObjectChangeEvents.changesPublished -= ObjectChangeEventsHandler;
Undo.postprocessModifications -= PostprocessModifications;
if (active)
{
ObjectChangeEvents.changesPublished += ObjectChangeEventsHandler;
Undo.postprocessModifications += PostprocessModifications;
}
}
void SetText ()
{
//Change text based on if active...
if (constrainActive)
{
text = "<color=#" + ColorUtility.ToHtmlStringRGB(btnColors[axisIndex] * 4) + "><b>Constrain to " + axisName[axisIndex] + "-axis";
}
else
{
text = "<b>Axis Constrain Off";
}
}
}
