public void OnSceneGUI()
{
bool mousePosValid = false;
Vector3 mousePos = Vector3.zero;
float radius = gizmo.brushSettings.brushSize / 2f;
int controlId = GUIUtility.GetControlID(GetHashCode(), FocusType.Passive);
Ray ray = HandleUtility.GUIPointToWorldRay(Event.current.mousePosition);
RaycastHit hit;
// TODO: raycast hit against layer
// see https://docs.unity3d.com/ScriptReference/Physics.Raycast.html
if (Physics.Raycast(ray.origin, ray.direction, out hit, Mathf.Infinity))
{
mousePos = hit.point;
mousePosValid = true;
///
/// process mouse events
///
// control key pressed
if (Event.current.control)
{
// mouse wheel up/down changes the radius
if (Event.current.type == EventType.ScrollWheel)
{
// ctrl + shift + scroll = brush rotation
if (Event.current.shift)
{
int rotationStepSize = 10;
int rotationMin = 0; // TODO: find out of to get that from Range
int rotationMax = 360; // TODO: find out of to get that from Range
// scroll up
if (Event.current.delta.y > 0)
{
gizmo.brushSettings.brushRotation += rotationStepSize;
if (gizmo.brushSettings.brushRotation > rotationMax)
{
gizmo.brushSettings.brushRotation = rotationMin + rotationStepSize;
}
Event.current.Use();
}
// scroll down
else if (Event.current.delta.y < 0)
{
gizmo.brushSettings.brushRotation -= rotationStepSize;
if (gizmo.brushSettings.brushRotation < rotationMin)
{
gizmo.brushSettings.brushRotation = rotationMax - rotationStepSize;
}
Event.current.Use();
}
}
// ctrl + scroll = brush size
else
{
// scroll up
if (Event.current.delta.y > 0)
{
gizmo.brushSettings.brushSize++;
Event.current.Use();
}
// scroll down
else if (Event.current.delta.y < 0)
{
gizmo.brushSettings.brushSize--;
// TODO: slider
if (gizmo.brushSettings.brushSize < 1)
{
gizmo.brushSettings.brushSize = 1;
}
Event.current.Use();
}
}
}
}
BrushMode brushMode = BrushMode.None;
if (Event.current.shift)
{
brushMode = BrushMode.Add;
if (Event.current.control)
{
brushMode = BrushMode.Remove;
}
}
// draw brush gizmo
DrawBrush(mousePos, hit.normal, radius, brushMode);
// paint prefabs on mouse drag
if (Event.current.type == EventType.MouseDrag || Event.current.type == EventType.MouseDown)
{
// left button = 0; right = 1; middle = 2
if (Event.current.button == 0)
{
switch (brushMode)
{
case BrushMode.None:
break;
case BrushMode.Add:
AddPrefabs(hit);
break;
case BrushMode.Remove:
RemovePrefabs(hit.point);
break;
}
Event.current.Use();
}
}
}
else
{
mousePosValid = false;
}
if (Event.current.type == EventType.Layout)
{
HandleUtility.AddDefaultControl(controlId);
}
// examples about how to show ui info
// note: Handles.BeginGUI and EndGUI are important, otherwise the default gizmos aren't drawn
Handles.BeginGUI();
if (mousePosValid)
{
ShowHandleInfo(mousePos);
}
string[] info = new string[] { "Add prefabs: shift + drag mouse\nRemove prefabs: shift + ctrl + drag mouse\nBrush size: ctrl + mousewheel, Brush rotation: ctrl + shift + mousewheel", "Children: " + editor.getContainerChildren().Length };
PrefabPainterEditor.ShowGuiInfo(info);
Handles.EndGUI();
}
