297 lines
12 KiB
C#
297 lines
12 KiB
C#
using System;
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using System.Reflection;
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using UnityEngine;
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namespace UnityEditor.Rendering.Universal
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{
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// Copy of UnityEditor.Rendering.HighDefinition.DisplacableRectHandles
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class DisplacableRectHandles
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{
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const float k_HandleSizeCoef = 0.05f;
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enum NamedEdge { Right, Top, Left, Bottom, None }
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int[] m_ControlIDs = new int[4] { 0, 0, 0, 0 };
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Color m_MonochromeHandleColor;
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Color m_WireframeColor;
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Color m_WireframeColorBehind;
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/// <summary>The position of the center of the box in Handle.matrix space. On plane z=0.</summary>
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public Vector2 center { get; set; }
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/// <summary>The size of the box in Handle.matrix space. On plane z=0.</summary>
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public Vector2 size { get; set; }
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//Note: Handles.Slider not allow to use a specific ControlID.
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//Thus Slider1D is used (with reflection)
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static Type k_Slider1D = Type.GetType("UnityEditorInternal.Slider1D, UnityEditor");
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static MethodInfo k_Slider1D_Do = k_Slider1D
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.GetMethod(
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"Do",
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BindingFlags.Static | BindingFlags.NonPublic | BindingFlags.Public,
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null,
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CallingConventions.Any,
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new[] { typeof(int), typeof(Vector3), typeof(Vector3), typeof(float), typeof(Handles.CapFunction), typeof(float) },
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null);
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static void Slider1D(int controlID, ref Vector3 handlePosition, Vector3 handleOrientation, float snapScale)
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{
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handlePosition = (Vector3)k_Slider1D_Do.Invoke(null, new object[]
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{
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controlID,
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handlePosition,
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handleOrientation,
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HandleUtility.GetHandleSize(handlePosition) * k_HandleSizeCoef,
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new Handles.CapFunction(Handles.DotHandleCap),
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snapScale
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});
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}
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/// <summary>The baseColor used to draw the rect.</summary>
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public Color baseColor
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{
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get { return m_MonochromeHandleColor; }
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set
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{
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m_MonochromeHandleColor = GizmoUtility.GetHandleColor(value);
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m_WireframeColor = GizmoUtility.GetWireframeColor(value);
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m_WireframeColorBehind = GizmoUtility.GetWireframeColorBehindObjects(value);
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}
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}
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public DisplacableRectHandles(Color baseColor)
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{
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this.baseColor = baseColor;
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}
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/// <summary>Draw the rect.</summary>
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public void DrawRect(bool dottedLine = false, float thickness = .0f, float screenSpaceSize = 5f)
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{
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Vector2 start = center - size * .5f;
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Vector3[] positions = new Vector3[]
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{
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start,
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start + size * Vector2.right,
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start + size,
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start + size * Vector2.up
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};
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Vector3[] edges = new Vector3[]
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{
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positions[0], positions[1],
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positions[1], positions[2],
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positions[2], positions[3],
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positions[3], positions[0],
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};
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void Draw()
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{
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if (dottedLine)
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Handles.DrawDottedLines(edges, screenSpaceSize);
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else
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{
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Handles.DrawLine(positions[0], positions[1], thickness);
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Handles.DrawLine(positions[1], positions[2], thickness);
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Handles.DrawLine(positions[2], positions[3], thickness);
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Handles.DrawLine(positions[3], positions[0], thickness);
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}
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}
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Color previousColor = Handles.color;
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Handles.color = m_WireframeColor;
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Handles.zTest = UnityEngine.Rendering.CompareFunction.LessEqual;
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Draw();
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Handles.color = m_WireframeColorBehind;
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Handles.zTest = UnityEngine.Rendering.CompareFunction.Greater;
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Draw();
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Handles.zTest = UnityEngine.Rendering.CompareFunction.Always;
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Handles.color = previousColor;
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}
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NamedEdge DrawSliders(ref Vector3 leftPosition, ref Vector3 rightPosition, ref Vector3 topPosition, ref Vector3 bottomPosition)
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{
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NamedEdge theChangedEdge = NamedEdge.None;
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using (new Handles.DrawingScope(m_MonochromeHandleColor))
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{
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EditorGUI.BeginChangeCheck();
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Slider1D(m_ControlIDs[(int)NamedEdge.Left], ref leftPosition, Vector3.left, EditorSnapSettings.scale);
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if (EditorGUI.EndChangeCheck())
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theChangedEdge = NamedEdge.Left;
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EditorGUI.BeginChangeCheck();
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Slider1D(m_ControlIDs[(int)NamedEdge.Right], ref rightPosition, Vector3.right, EditorSnapSettings.scale);
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if (EditorGUI.EndChangeCheck())
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theChangedEdge = NamedEdge.Right;
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EditorGUI.BeginChangeCheck();
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Slider1D(m_ControlIDs[(int)NamedEdge.Top], ref topPosition, Vector3.up, EditorSnapSettings.scale);
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if (EditorGUI.EndChangeCheck())
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theChangedEdge = NamedEdge.Top;
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EditorGUI.BeginChangeCheck();
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Slider1D(m_ControlIDs[(int)NamedEdge.Bottom], ref bottomPosition, Vector3.down, EditorSnapSettings.scale);
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if (EditorGUI.EndChangeCheck())
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theChangedEdge = NamedEdge.Bottom;
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}
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return theChangedEdge;
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}
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void EnsureEdgeFacesOutsideForHomothety(NamedEdge theChangedEdge, ref Vector3 leftPosition, ref Vector3 rightPosition, ref Vector3 topPosition, ref Vector3 bottomPosition)
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{
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switch (theChangedEdge)
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{
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case NamedEdge.Left:
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if (rightPosition.x < leftPosition.x)
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leftPosition.x = rightPosition.x;
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if (topPosition.y < bottomPosition.y)
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topPosition.y = bottomPosition.y = center.y;
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break;
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case NamedEdge.Right:
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if (rightPosition.x < leftPosition.x)
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rightPosition.x = leftPosition.x;
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if (topPosition.y < bottomPosition.y)
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topPosition.y = bottomPosition.y = center.y;
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break;
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case NamedEdge.Top:
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if (topPosition.y < bottomPosition.y)
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topPosition.y = bottomPosition.y;
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if (rightPosition.x < leftPosition.x)
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rightPosition.x = leftPosition.x = center.x;
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break;
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case NamedEdge.Bottom:
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if (topPosition.y < bottomPosition.y)
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bottomPosition.y = topPosition.y;
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if (rightPosition.x < leftPosition.x)
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rightPosition.x = leftPosition.x = center.x;
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break;
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}
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}
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void EnsureEdgeFacesOutsideForSymetry(NamedEdge theChangedEdge, ref Vector3 leftPosition, ref Vector3 rightPosition, ref Vector3 topPosition, ref Vector3 bottomPosition)
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{
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switch (theChangedEdge)
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{
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case NamedEdge.Left:
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case NamedEdge.Right:
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if (rightPosition.x < leftPosition.x)
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rightPosition.x = leftPosition.x = center.x;
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break;
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case NamedEdge.Top:
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case NamedEdge.Bottom:
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if (topPosition.y < bottomPosition.y)
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topPosition.y = bottomPosition.y = center.y;
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break;
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}
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}
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void EnsureEdgeFacesOutsideForOtherTransformation(ref Vector2 max, ref Vector2 min)
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{
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for (int axis = 0; axis < 2; ++axis)
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{
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if (min[axis] > max[axis])
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{
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// Control IDs in m_ControlIDs[0-1] are for positive axes
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if (GUIUtility.hotControl == m_ControlIDs[axis])
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max[axis] = min[axis];
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else
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min[axis] = max[axis];
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}
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}
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}
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/// <summary>Draw the manipulable handles</summary>
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public void DrawHandle()
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{
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Event evt = Event.current;
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bool useHomothety = evt.shift;
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bool useSymetry = evt.alt || evt.command;
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// Note: snapping is handled natively on ctrl for each Slider1D
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for (int i = 0, count = m_ControlIDs.Length; i < count; ++i)
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m_ControlIDs[i] = GUIUtility.GetControlID("DisplacableRectHandles".GetHashCode() + i, FocusType.Passive);
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Vector3 leftPosition = center + size.x * .5f * Vector2.left;
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Vector3 rightPosition = center + size.x * .5f * Vector2.right;
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Vector3 topPosition = center + size.y * .5f * Vector2.up;
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Vector3 bottomPosition = center + size.y * .5f * Vector2.down;
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var theChangedEdge = NamedEdge.None;
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EditorGUI.BeginChangeCheck();
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theChangedEdge = DrawSliders(ref leftPosition, ref rightPosition, ref topPosition, ref bottomPosition);
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if (EditorGUI.EndChangeCheck())
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{
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float delta = 0f;
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switch (theChangedEdge)
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{
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case NamedEdge.Left: delta = ((Vector2)leftPosition - center - size.x * .5f * Vector2.left).x; break;
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case NamedEdge.Right: delta = -((Vector2)rightPosition - center - size.x * .5f * Vector2.right).x; break;
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case NamedEdge.Top: delta = -((Vector2)topPosition - center - size.y * .5f * Vector2.up).y; break;
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case NamedEdge.Bottom: delta = ((Vector2)bottomPosition - center - size.y * .5f * Vector2.down).y; break;
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}
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if (useHomothety && useSymetry)
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{
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var tempSize = size - Vector2.one * delta;
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//ensure that the rect edges are still facing outside
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for (int axis = 0; axis < 3; ++axis)
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{
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if (tempSize[axis] < 0)
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{
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delta += tempSize[axis];
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tempSize = size - Vector2.one * delta;
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}
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}
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size = tempSize;
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}
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else
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{
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if (useSymetry)
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{
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switch (theChangedEdge)
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{
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case NamedEdge.Left: rightPosition.x -= delta; break;
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case NamedEdge.Right: leftPosition.x += delta; break;
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case NamedEdge.Top: bottomPosition.y += delta; break;
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case NamedEdge.Bottom: topPosition.y -= delta; break;
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}
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EnsureEdgeFacesOutsideForSymetry(theChangedEdge, ref leftPosition, ref rightPosition, ref topPosition, ref bottomPosition);
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}
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if (useHomothety)
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{
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float halfDelta = delta * 0.5f;
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switch (theChangedEdge)
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{
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case NamedEdge.Left:
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case NamedEdge.Right:
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bottomPosition.y += halfDelta;
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topPosition.y -= halfDelta;
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break;
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case NamedEdge.Top:
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case NamedEdge.Bottom:
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rightPosition.x -= halfDelta;
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leftPosition.x += halfDelta;
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break;
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}
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EnsureEdgeFacesOutsideForHomothety(theChangedEdge, ref leftPosition, ref rightPosition, ref topPosition, ref bottomPosition);
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}
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var max = new Vector2(rightPosition.x, topPosition.y);
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var min = new Vector2(leftPosition.x, bottomPosition.y);
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if (!useSymetry && !useHomothety)
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EnsureEdgeFacesOutsideForOtherTransformation(ref max, ref min);
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center = (max + min) * .5f;
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size = max - min;
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}
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}
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}
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}
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}
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