// Unity C# reference source

// Copyright (c) Unity Technologies. For terms of use, see

// https://unity3d.com/legal/licenses/Unity_Reference_Only_License

using UnityEditor.AnimatedValues;

using UnityEngine;

using UnityEditor;

using System.Collections;

namespace UnityEditor

{

[System.Serializable]

internal class SceneViewGrid

{

static PrefColor kViewGridColor = new PrefColor("Scene/Grid", .5f, .5f, .5f, .4f);

public void Register(SceneView source)

{

// hook up the anims, so repainting can work correctly

xGrid.valueChanged.AddListener(source.Repaint);

yGrid.valueChanged.AddListener(source.Repaint);

zGrid.valueChanged.AddListener(source.Repaint);

}

[SerializeField]

AnimBool xGrid = new AnimBool();

[SerializeField]

AnimBool yGrid = new AnimBool();

[SerializeField]

AnimBool zGrid = new AnimBool();

public DrawGridParameters PrepareGridRender(Camera camera, Vector3 pivot, Quaternion rotation,

float size, bool orthoMode, bool gridVisible

)

{

bool _xGrid = false, _yGrid = false, _zGrid = false;

if (gridVisible)

{

if (orthoMode)

{

Vector3 fwd = rotation * Vector3.forward;

// Show horizontal grid as long as angle is not too small

if (Mathf.Abs(fwd.y) > 0.2f)

_yGrid = true;

// Show xy and zy planes only when straight on

else if (fwd == Vector3.left || fwd == Vector3.right)

_xGrid = true;

else if (fwd == Vector3.forward || fwd == Vector3.back)

_zGrid = true;

}

else

{

_yGrid = true;

}

}

xGrid.target = _xGrid;

yGrid.target = _yGrid;

zGrid.target = _zGrid;

DrawGridParameters parameters;

parameters.pivot = pivot;

parameters.color = kViewGridColor;

parameters.size = size;

parameters.alphaX = xGrid.faded;

parameters.alphaY = yGrid.faded;

parameters.alphaZ = zGrid.faded;

return parameters;

}

}

} // namespace