97 lines
2.6 KiB
C#
97 lines
2.6 KiB
C#
// Copyright (c) 2012-2022 Wojciech Figat. All rights reserved.
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using System;
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using FlaxEngine;
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namespace FlaxEditor.Gizmo
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{
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/// <summary>
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/// Draws a grid to feel better world origin position and the world units.
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/// </summary>
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/// <seealso cref="FlaxEditor.Gizmo.GizmoBase" />
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[HideInEditor]
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public class GridGizmo : GizmoBase
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{
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private bool _enabled = true;
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/// <summary>
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/// Gets or sets a value indicating whether this <see cref="GridGizmo"/> is enabled.
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/// </summary>
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public bool Enabled
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{
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get => _enabled;
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set
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{
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if (_enabled != value)
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{
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_enabled = value;
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EnabledChanged?.Invoke(this);
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}
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}
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}
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/// <summary>
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/// Occurs when enabled state gets changed.
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/// </summary>
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public event Action<GridGizmo> EnabledChanged;
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/// <summary>
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/// Initializes a new instance of the <see cref="GridGizmo"/> class.
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/// </summary>
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/// <param name="owner">The gizmos owner.</param>
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public GridGizmo(IGizmoOwner owner)
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: base(owner)
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{
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}
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/// <inheritdoc />
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public override void Draw(ref RenderContext renderContext)
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{
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if (!Enabled)
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return;
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var viewPos = Owner.ViewPosition;
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var plane = new Plane(Vector3.Zero, Vector3.UnitY);
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var dst = CollisionsHelper.DistancePlanePoint(ref plane, ref viewPos);
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float space, size;
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if (dst <= 500.0f)
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{
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space = 50;
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size = 8000;
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}
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else if (dst <= 2000.0f)
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{
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space = 100;
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size = 8000;
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}
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else
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{
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space = 1000;
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size = 100000;
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}
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Color color = Color.Gray * 0.7f;
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int count = (int)(size / space);
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Vector3 start = new Vector3(0, 0, size * -0.5f);
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Vector3 end = new Vector3(0, 0, size * 0.5f);
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for (int i = 0; i <= count; i++)
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{
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start.X = end.X = i * space + start.Z;
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DebugDraw.DrawLine(start, end, color);
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}
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start = new Vector3(size * -0.5f, 0, 0);
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end = new Vector3(size * 0.5f, 0, 0);
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for (int i = 0; i <= count; i++)
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{
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start.Z = end.Z = i * space + start.X;
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DebugDraw.DrawLine(start, end, color);
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}
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}
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}
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}
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