97 lines
2.6 KiB
C#
97 lines
2.6 KiB
C#
// Copyright (c) 2012-2021 Wojciech Figat. All rights reserved.
|
|
|
|
using System;
|
|
using FlaxEngine;
|
|
|
|
namespace FlaxEditor.Gizmo
|
|
{
|
|
/// <summary>
|
|
/// Draws a grid to feel better world origin position and the world units.
|
|
/// </summary>
|
|
/// <seealso cref="FlaxEditor.Gizmo.GizmoBase" />
|
|
[HideInEditor]
|
|
public class GridGizmo : GizmoBase
|
|
{
|
|
private bool _enabled = true;
|
|
|
|
/// <summary>
|
|
/// Gets or sets a value indicating whether this <see cref="GridGizmo"/> is enabled.
|
|
/// </summary>
|
|
public bool Enabled
|
|
{
|
|
get => _enabled;
|
|
set
|
|
{
|
|
if (_enabled != value)
|
|
{
|
|
_enabled = value;
|
|
EnabledChanged?.Invoke(this);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Occurs when enabled state gets changed.
|
|
/// </summary>
|
|
public event Action<GridGizmo> EnabledChanged;
|
|
|
|
/// <summary>
|
|
/// Initializes a new instance of the <see cref="GridGizmo"/> class.
|
|
/// </summary>
|
|
/// <param name="owner">The gizmos owner.</param>
|
|
public GridGizmo(IGizmoOwner owner)
|
|
: base(owner)
|
|
{
|
|
}
|
|
|
|
/// <inheritdoc />
|
|
public override void Draw(ref RenderContext renderContext)
|
|
{
|
|
if (!Enabled)
|
|
return;
|
|
|
|
var viewPos = Owner.ViewPosition;
|
|
var plane = new Plane(Vector3.Zero, Vector3.UnitY);
|
|
float dst = CollisionsHelper.DistancePlanePoint(ref plane, ref viewPos);
|
|
|
|
float space, size;
|
|
if (dst <= 500.0f)
|
|
{
|
|
space = 50;
|
|
size = 8000;
|
|
}
|
|
else if (dst <= 2000.0f)
|
|
{
|
|
space = 100;
|
|
size = 8000;
|
|
}
|
|
else
|
|
{
|
|
space = 1000;
|
|
size = 100000;
|
|
}
|
|
|
|
Color color = Color.Gray * 0.7f;
|
|
int count = (int)(size / space);
|
|
|
|
Vector3 start = new Vector3(0, 0, size * -0.5f);
|
|
Vector3 end = new Vector3(0, 0, size * 0.5f);
|
|
|
|
for (int i = 0; i <= count; i++)
|
|
{
|
|
start.X = end.X = i * space + start.Z;
|
|
DebugDraw.DrawLine(start, end, color);
|
|
}
|
|
|
|
start = new Vector3(size * -0.5f, 0, 0);
|
|
end = new Vector3(size * 0.5f, 0, 0);
|
|
|
|
for (int i = 0; i <= count; i++)
|
|
{
|
|
start.Z = end.Z = i * space + start.X;
|
|
DebugDraw.DrawLine(start, end, color);
|
|
}
|
|
}
|
|
}
|
|
}
|