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EdgeControl.cs
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1112 lines (931 loc) · 39.6 KB
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// Unity C# reference source
// Copyright (c) Unity Technologies. For terms of use, see
// https://unity3d.com/legal/licenses/Unity_Reference_Only_License
using System;
using UnityEngine;
using UnityEngine.UIElements;
using System.Collections.Generic;
using UnityEngine.Profiling;
using Unity.Collections;
using UnityEngine.UIElements.UIR;
namespace UnityEditor.Experimental.GraphView
{
public class EdgeControl : VisualElement
{
private struct EdgeCornerSweepValues
{
public Vector2 circleCenter;
public double sweepAngle;
public double startAngle;
public double endAngle;
public Vector2 crossPoint1;
public Vector2 crossPoint2;
public float radius;
}
private VisualElement m_FromCap;
private VisualElement m_ToCap;
private GraphView m_GraphView;
private static Stack<VisualElement> capPool = new Stack<VisualElement>();
private static VisualElement GetCap()
{
VisualElement result = null;
if (capPool.Count > 0)
{
result = capPool.Pop();
}
else
{
result = new VisualElement();
result.AddToClassList("edgeCap");
}
return result;
}
private static void RecycleCap(VisualElement cap)
{
capPool.Push(cap);
}
public EdgeControl()
{
RegisterCallback<DetachFromPanelEvent>(OnLeavePanel);
m_FromCap = null;
m_ToCap = null;
pickingMode = PickingMode.Ignore;
}
private bool m_ControlPointsDirty = true;
private bool m_RenderPointsDirty = true;
private bool m_MeshDirty = true;
Mesh m_Mesh;
public const float k_MinEdgeWidth = 1.75f;
private const float k_EdgeLengthFromPort = 12.0f;
private const float k_EdgeTurnDiameter = 16.0f;
private const float k_EdgeSweepResampleRatio = 4.0f;
private const int k_EdgeStraightLineSegmentDivisor = 5;
private Orientation m_InputOrientation;
public Orientation inputOrientation
{
get { return m_InputOrientation; }
set
{
if (m_InputOrientation == value)
return;
m_InputOrientation = value;
MarkDirtyRepaint();
}
}
private Orientation m_OutputOrientation;
public Orientation outputOrientation
{
get { return m_OutputOrientation; }
set
{
if (m_OutputOrientation == value)
return;
m_OutputOrientation = value;
MarkDirtyRepaint();
}
}
[Obsolete("Use inputColor and/or outputColor")]
public Color edgeColor
{
get { return m_InputColor; }
set
{
if (m_InputColor == value && m_OutputColor == value)
return;
m_InputColor = value;
m_OutputColor = value;
MarkDirtyRepaint();
}
}
Color m_InputColor = Color.grey;
public Color inputColor
{
get { return m_InputColor; }
set
{
if (m_InputColor != value)
{
m_InputColor = value;
MarkDirtyRepaint();
}
}
}
Color m_OutputColor = Color.grey;
public Color outputColor
{
get { return m_OutputColor; }
set
{
if (m_OutputColor != value)
{
m_OutputColor = value;
MarkDirtyRepaint();
}
}
}
private Color m_FromCapColor;
public Color fromCapColor
{
get { return m_FromCapColor; }
set
{
if (m_FromCapColor == value)
return;
m_FromCapColor = value;
if (m_FromCap != null)
{
m_FromCap.style.backgroundColor = m_FromCapColor;
}
}
}
private Color m_ToCapColor;
public Color toCapColor
{
get { return m_ToCapColor; }
set
{
if (m_ToCapColor == value)
return;
m_ToCapColor = value;
if (m_ToCap != null)
{
m_ToCap.style.backgroundColor = m_ToCapColor;
}
}
}
private float m_CapRadius = 5;
public float capRadius
{
get { return m_CapRadius; }
set
{
if (m_CapRadius == value)
return;
m_CapRadius = value;
MarkDirtyRepaint();
}
}
private int m_EdgeWidth = 2;
public int edgeWidth
{
get { return m_EdgeWidth; }
set
{
if (m_EdgeWidth == value)
return;
m_EdgeWidth = value;
m_MeshDirty = true;
UpdateLayout(); // The layout depends on the edges width
MarkDirtyRepaint();
}
}
private float m_InterceptWidth = 5;
public float interceptWidth
{
get { return m_InterceptWidth; }
set { m_InterceptWidth = value; }
}
// The start of the edge in graph coordinates.
private Vector2 m_From;
public Vector2 from
{
get { return m_From; }
set
{
if ((m_From - value).sqrMagnitude > 0.25f)
{
m_From = value;
PointsChanged();
}
}
}
// The end of the edge in graph coordinates.
private Vector2 m_To;
public Vector2 to
{
get { return m_To; }
set
{
if ((m_To - value).sqrMagnitude > 0.25f)
{
m_To = value;
PointsChanged();
}
}
}
// The control points in graph coordinates.
private Vector2[] m_ControlPoints;
public Vector2[] controlPoints
{
get
{
return m_ControlPoints;
}
}
public bool drawFromCap
{
get { return m_FromCap != null; }
set
{
if (!value)
{
if (m_FromCap != null)
{
m_FromCap.RemoveFromHierarchy();
RecycleCap(m_FromCap);
m_FromCap = null;
}
}
else
{
if (m_FromCap == null)
{
m_FromCap = GetCap();
m_FromCap.style.backgroundColor = m_FromCapColor;
Add(m_FromCap);
}
}
}
}
public bool drawToCap
{
get { return m_ToCap != null; }
set
{
if (!value)
{
if (m_ToCap != null)
{
m_ToCap.RemoveFromHierarchy();
RecycleCap(m_ToCap);
m_ToCap = null;
}
}
else
{
if (m_ToCap == null)
{
m_ToCap = GetCap();
m_ToCap.style.backgroundColor = m_ToCapColor;
Add(m_ToCap);
}
}
}
}
void UpdateEdgeCaps()
{
if (m_FromCap != null)
{
Vector2 size = m_FromCap.layout.size;
if ((size.x > 0) && (size.y > 0))
m_FromCap.layout = new Rect(parent.ChangeCoordinatesTo(this, m_From) - (size / 2), size);
}
if (m_ToCap != null)
{
Vector2 size = m_ToCap.layout.size;
if ((size.x > 0) && (size.y > 0))
m_ToCap.layout = new Rect(parent.ChangeCoordinatesTo(this, m_To) - (size / 2), size);
}
}
internal override void DoRepaint(IStylePainter painter)
{
UnityEngine.Profiling.Profiler.BeginSample("DrawEdge");
// Edges do NOT call base.DoRepaint. It would create a visual artifact.
DrawEdge(painter);
UnityEngine.Profiling.Profiler.EndSample();
}
public override bool ContainsPoint(Vector2 localPoint)
{
Profiler.BeginSample("EdgeControl.ContainsPoint");
if (!base.ContainsPoint(localPoint))
{
Profiler.EndSample();
return false;
}
// bounding box check succeeded, do more fine grained check by measuring distance to bezier points
// exclude endpoints
float capMaxDist = 4 * capRadius * capRadius; //(2 * CapRadius)^2
if ((from - localPoint).sqrMagnitude <= capMaxDist ||
(to - localPoint).sqrMagnitude <= capMaxDist)
{
Profiler.EndSample();
return false;
}
var allPoints = m_RenderPoints;
if (allPoints.Count > 0)
{
//we use squareDistance to avoid sqrts
float distance = (allPoints[0] - localPoint).sqrMagnitude;
float interceptWidth2 = interceptWidth * interceptWidth;
for (var i = 0; i < allPoints.Count - 1; i++)
{
Vector2 currentPoint = allPoints[i];
Vector2 nextPoint = allPoints[i + 1];
Vector2 next2Current = nextPoint - currentPoint;
float distanceNext = (nextPoint - localPoint).sqrMagnitude;
float distanceLine = next2Current.sqrMagnitude;
// if the point is somewhere between the two points
if (distance < distanceLine && distanceNext < distanceLine)
{
//https://en.wikipedia.org/wiki/Distance_from_a_point_to_a_line
var d = next2Current.y * localPoint.x -
next2Current.x * localPoint.y + nextPoint.x * currentPoint.y -
nextPoint.y * currentPoint.x;
if (d * d < interceptWidth2 * distanceLine)
{
Profiler.EndSample();
return true;
}
}
distance = distanceNext;
}
}
Profiler.EndSample();
return false;
}
public override bool Overlaps(Rect rect)
{
if (base.Overlaps(rect))
{
for (int a = 0; a < m_RenderPoints.Count - 1; a++)
{
if (RectUtils.IntersectsSegment(rect, m_RenderPoints[a], m_RenderPoints[a + 1]))
return true;
}
}
return false;
}
protected virtual void PointsChanged()
{
m_ControlPointsDirty = true;
MarkDirtyRepaint();
}
// The points that will be rendered. Expressed in coordinates local to the element.
List<Vector2> m_RenderPoints = new List<Vector2>();
static bool Approximately(Vector2 v1, Vector2 v2)
{
return Mathf.Approximately(v1.x, v2.x) && Mathf.Approximately(v1.y, v2.y);
}
public virtual void UpdateLayout()
{
if (parent == null) return;
if (m_ControlPointsDirty)
{
ComputeControlPoints(); // Computes the control points in parent ( graph ) coordinates
ComputeLayout(); // Update the element layout based on the control points.
m_ControlPointsDirty = false;
}
UpdateEdgeCaps();
}
private List<Vector2> lastLocalControlPoints = new List<Vector2>();
void RenderStraightLines(Vector2 p1, Vector2 p2, Vector2 p3, Vector2 p4)
{
float safeSpan = outputOrientation == Orientation.Horizontal
? Mathf.Abs((p1.x + k_EdgeLengthFromPort) - (p4.x - k_EdgeLengthFromPort))
: Mathf.Abs((p1.y + k_EdgeLengthFromPort) - (p4.y - k_EdgeLengthFromPort));
float safeSpan3 = safeSpan / k_EdgeStraightLineSegmentDivisor;
float nodeToP2Dist = Mathf.Min(safeSpan3, k_EdgeTurnDiameter);
nodeToP2Dist = Mathf.Max(0, nodeToP2Dist);
var offset = outputOrientation == Orientation.Horizontal
? new Vector2(k_EdgeTurnDiameter - nodeToP2Dist, 0)
: new Vector2(0, k_EdgeTurnDiameter - nodeToP2Dist);
m_RenderPoints.Add(p1);
m_RenderPoints.Add(p2 - offset);
m_RenderPoints.Add(p3 + offset);
m_RenderPoints.Add(p4);
}
protected virtual void UpdateRenderPoints()
{
ComputeControlPoints(); // This should have been updated before : make sure anyway.
if (m_RenderPointsDirty == false && m_ControlPoints != null)
{
return;
}
Vector2 p1 = parent.ChangeCoordinatesTo(this, m_ControlPoints[0]);
Vector2 p2 = parent.ChangeCoordinatesTo(this, m_ControlPoints[1]);
Vector2 p3 = parent.ChangeCoordinatesTo(this, m_ControlPoints[2]);
Vector2 p4 = parent.ChangeCoordinatesTo(this, m_ControlPoints[3]);
// Only compute this when the "local" points have actually changed
if (lastLocalControlPoints.Count == 4)
{
if (Approximately(p1, lastLocalControlPoints[0]) &&
Approximately(p2, lastLocalControlPoints[1]) &&
Approximately(p3, lastLocalControlPoints[2]) &&
Approximately(p4, lastLocalControlPoints[3]))
{
m_RenderPointsDirty = false;
return;
}
}
Profiler.BeginSample("EdgeControl.UpdateRenderPoints");
lastLocalControlPoints.Clear();
lastLocalControlPoints.Add(p1);
lastLocalControlPoints.Add(p2);
lastLocalControlPoints.Add(p3);
lastLocalControlPoints.Add(p4);
m_RenderPointsDirty = false;
m_MeshDirty = true;
m_RenderPoints.Clear();
float diameter = k_EdgeTurnDiameter;
// We have to handle a special case of the edge when it is a straight line, but not
// when going backwards in space (where the start point is in front in y to the end point).
// We do this by turning the line into 3 linear segments with no curves. This also
// avoids possible NANs in later angle calculations.
bool sameOrientations = outputOrientation == inputOrientation;
if (sameOrientations &&
((outputOrientation == Orientation.Horizontal && Mathf.Abs(p1.y - p4.y) < 2 && p1.x + k_EdgeLengthFromPort < p4.x - k_EdgeLengthFromPort) ||
(outputOrientation == Orientation.Vertical && Mathf.Abs(p1.x - p4.x) < 2 && p1.y + k_EdgeLengthFromPort < p4.y - k_EdgeLengthFromPort)))
{
RenderStraightLines(p1, p2, p3, p4);
Profiler.EndSample();
return;
}
bool renderBothCorners = true;
EdgeCornerSweepValues corner1 = GetCornerSweepValues(p1, p2, p3, diameter, Direction.Output);
EdgeCornerSweepValues corner2 = GetCornerSweepValues(p2, p3, p4, diameter, Direction.Input);
if (!ValidateCornerSweepValues(ref corner1, ref corner2))
{
if (sameOrientations)
{
RenderStraightLines(p1, p2, p3, p4);
Profiler.EndSample();
return;
}
renderBothCorners = false;
//we try to do it with a single corner instead
Vector2 px = (outputOrientation == Orientation.Horizontal) ? new Vector2(p4.x, p1.y) : new Vector2(p1.x, p4.y);
corner1 = GetCornerSweepValues(p1, px, p4, diameter, Direction.Output);
}
m_RenderPoints.Add(p1);
if (!sameOrientations && renderBothCorners)
{
//if the 2 corners or endpoints are too close, the corner sweep angle calculations can't handle different orientations
float minDistance = 2 * diameter * diameter;
if ((p3 - p2).sqrMagnitude < minDistance ||
(p4 - p1).sqrMagnitude < minDistance)
{
Vector2 px = (p2 + p3) * 0.5f;
corner1 = GetCornerSweepValues(p1, px, p4, diameter, Direction.Output);
renderBothCorners = false;
}
}
GetRoundedCornerPoints(m_RenderPoints, corner1, Direction.Output);
if (renderBothCorners)
GetRoundedCornerPoints(m_RenderPoints, corner2, Direction.Input);
m_RenderPoints.Add(p4);
Profiler.EndSample();
}
private bool ValidateCornerSweepValues(ref EdgeCornerSweepValues corner1, ref EdgeCornerSweepValues corner2)
{
// Get the midpoint between the two corner circle centers.
Vector2 circlesMidpoint = (corner1.circleCenter + corner2.circleCenter) / 2;
// Find the angle to the corner circles midpoint so we can compare it to the sweep angles of each corner.
Vector2 p2CenterToCross1 = corner1.circleCenter - corner1.crossPoint1;
Vector2 p2CenterToCirclesMid = corner1.circleCenter - circlesMidpoint;
double angleToCirclesMid = outputOrientation == Orientation.Horizontal
? Math.Atan2(p2CenterToCross1.y, p2CenterToCross1.x) - Math.Atan2(p2CenterToCirclesMid.y, p2CenterToCirclesMid.x)
: Math.Atan2(p2CenterToCross1.x, p2CenterToCross1.y) - Math.Atan2(p2CenterToCirclesMid.x, p2CenterToCirclesMid.y);
if (double.IsNaN(angleToCirclesMid))
return false;
// We need the angle to the circles midpoint to match the turn direction of the first corner's sweep angle.
angleToCirclesMid = Math.Sign(angleToCirclesMid) * 2 * Mathf.PI - angleToCirclesMid;
if (Mathf.Abs((float)angleToCirclesMid) > 1.5 * Mathf.PI)
angleToCirclesMid = -1 * Math.Sign(angleToCirclesMid) * 2 * Mathf.PI + angleToCirclesMid;
// Calculate the maximum sweep angle so that both corner sweeps and with the tangents of the 2 circles meeting each other.
float h = p2CenterToCirclesMid.magnitude;
float p2AngleToMidTangent = Mathf.Acos(corner1.radius / h);
if (double.IsNaN(p2AngleToMidTangent))
return false;
float maxSweepAngle = Mathf.Abs((float)corner1.sweepAngle) - p2AngleToMidTangent * 2;
// If the angle to the circles midpoint is within the sweep angle, we need to apply our maximum sweep angle
// calculated above, otherwise the maximum sweep angle is irrelevant.
if (Mathf.Abs((float)angleToCirclesMid) < Mathf.Abs((float)corner1.sweepAngle))
{
corner1.sweepAngle = Math.Sign(corner1.sweepAngle) * Mathf.Min(maxSweepAngle, Mathf.Abs((float)corner1.sweepAngle));
corner2.sweepAngle = Math.Sign(corner2.sweepAngle) * Mathf.Min(maxSweepAngle, Mathf.Abs((float)corner2.sweepAngle));
}
return true;
}
private EdgeCornerSweepValues GetCornerSweepValues(
Vector2 p1, Vector2 cornerPoint, Vector2 p2, float diameter, Direction closestPortDirection)
{
EdgeCornerSweepValues corner = new EdgeCornerSweepValues();
// Calculate initial radius. This radius can change depending on the sharpness of the corner.
corner.radius = diameter / 2;
// Calculate vectors from p1 to cornerPoint.
Vector2 d1Corner = (cornerPoint - p1).normalized;
Vector2 d1 = d1Corner * diameter;
float dx1 = d1.x;
float dy1 = d1.y;
// Calculate vectors from p2 to cornerPoint.
Vector2 d2Corner = (cornerPoint - p2).normalized;
Vector2 d2 = d2Corner * diameter;
float dx2 = d2.x;
float dy2 = d2.y;
// Calculate the angle of the corner (divided by 2).
float angle = (float)(Math.Atan2(dy1, dx1) - Math.Atan2(dy2, dx2)) / 2;
// Calculate the length of the segment between the cornerPoint and where
// the corner circle with given radius meets the line.
float tan = (float)Math.Abs(Math.Tan(angle));
float segment = corner.radius / tan;
// If the segment is larger than the diameter, we need to cap the segment
// to the diameter and reduce the radius to match the segment. This is what
// makes the corner turn radii get smaller as the edge corners get tighter.
if (segment > diameter)
{
segment = diameter;
corner.radius = diameter * tan;
}
// Calculate both cross points (where the circle touches the p1-cornerPoint line
// and the p2-cornerPoint line).
corner.crossPoint1 = cornerPoint - (d1Corner * segment);
corner.crossPoint2 = cornerPoint - (d2Corner * segment);
// Calculation of the coordinates of the circle center.
corner.circleCenter = GetCornerCircleCenter(cornerPoint, corner.crossPoint1, corner.crossPoint2, segment, corner.radius);
// Calculate the starting and ending angles.
corner.startAngle = Math.Atan2(corner.crossPoint1.y - corner.circleCenter.y, corner.crossPoint1.x - corner.circleCenter.x);
corner.endAngle = Math.Atan2(corner.crossPoint2.y - corner.circleCenter.y, corner.crossPoint2.x - corner.circleCenter.x);
// Get the full sweep angle from the starting and ending angles.
corner.sweepAngle = corner.endAngle - corner.startAngle;
// If we are computing the second corner (into the input port), we want to start
// the sweep going backwards.
if (closestPortDirection == Direction.Input)
{
double endAngle = corner.endAngle;
corner.endAngle = corner.startAngle;
corner.startAngle = endAngle;
}
// Validate the sweep angle so it turns into the correct direction.
if (corner.sweepAngle > Math.PI)
corner.sweepAngle = -2 * Math.PI + corner.sweepAngle;
else if (corner.sweepAngle < -Math.PI)
corner.sweepAngle = 2 * Math.PI + corner.sweepAngle;
return corner;
}
private Vector2 GetCornerCircleCenter(Vector2 cornerPoint, Vector2 crossPoint1, Vector2 crossPoint2, float segment, float radius)
{
float dx = cornerPoint.x * 2 - crossPoint1.x - crossPoint2.x;
float dy = cornerPoint.y * 2 - crossPoint1.y - crossPoint2.y;
var cornerToCenterVector = new Vector2(dx, dy);
float L = cornerToCenterVector.magnitude;
if (Mathf.Approximately(L, 0))
{
return cornerPoint;
}
float d = new Vector2(segment, radius).magnitude;
float factor = d / L;
return new Vector2(cornerPoint.x - cornerToCenterVector.x * factor, cornerPoint.y - cornerToCenterVector.y * factor);
}
private void GetRoundedCornerPoints(List<Vector2> points, EdgeCornerSweepValues corner, Direction closestPortDirection)
{
// Calculate the number of points that will sample the arc from the sweep angle.
int pointsCount = Mathf.CeilToInt((float)Math.Abs(corner.sweepAngle * k_EdgeSweepResampleRatio));
int sign = Math.Sign(corner.sweepAngle);
bool backwards = (closestPortDirection == Direction.Input);
for (int i = 0; i < pointsCount; ++i)
{
// If we are computing the second corner (into the input port), the sweep is going backwards
// but we still need to add the points to the list in the correct order.
float sweepIndex = backwards ? i - pointsCount : i;
double sweepedAngle = corner.startAngle + sign * sweepIndex / k_EdgeSweepResampleRatio;
var pointX = (float)(corner.circleCenter.x + Math.Cos(sweepedAngle) * corner.radius);
var pointY = (float)(corner.circleCenter.y + Math.Sin(sweepedAngle) * corner.radius);
// Check if we overlap the previous point. If we do, we skip this point so that we
// don't cause the edge polygons to twist.
if (i == 0 && backwards)
{
if (outputOrientation == Orientation.Horizontal)
{
if (corner.sweepAngle < 0 && points[points.Count - 1].y > pointY)
continue;
else if (corner.sweepAngle >= 0 && points[points.Count - 1].y < pointY)
continue;
}
else
{
if (corner.sweepAngle < 0 && points[points.Count - 1].x < pointX)
continue;
else if (corner.sweepAngle >= 0 && points[points.Count - 1].x > pointX)
continue;
}
}
points.Add(new Vector2(pointX, pointY));
}
}
private void AssignControlPoint(ref Vector2 destination, Vector2 newValue)
{
if (!Approximately(destination, newValue))
{
destination = newValue;
m_RenderPointsDirty = true;
}
}
protected virtual void ComputeControlPoints()
{
if (m_ControlPointsDirty == false) return;
Profiler.BeginSample("EdgeControl.ComputeControlPoints");
float offset = k_EdgeLengthFromPort + k_EdgeTurnDiameter;
// This is to ensure we don't have the edge extending
// left and right by the offset right when the `from`
// and `to` are on top of each other.
float fromToDistance = (to - from).magnitude;
offset = Mathf.Min(offset, fromToDistance * 2);
offset = Mathf.Max(offset, k_EdgeTurnDiameter);
if (m_ControlPoints == null || m_ControlPoints.Length != 4)
m_ControlPoints = new Vector2[4];
AssignControlPoint(ref m_ControlPoints[0], from);
if (outputOrientation == Orientation.Horizontal)
AssignControlPoint(ref m_ControlPoints[1], new Vector2(from.x + offset, from.y));
else
AssignControlPoint(ref m_ControlPoints[1], new Vector2(from.x, from.y + offset));
if (inputOrientation == Orientation.Horizontal)
AssignControlPoint(ref m_ControlPoints[2], new Vector2(to.x - offset, to.y));
else
AssignControlPoint(ref m_ControlPoints[2], new Vector2(to.x, to.y - offset));
AssignControlPoint(ref m_ControlPoints[3], to);
Profiler.EndSample();
}
void ComputeLayout()
{
Profiler.BeginSample("EdgeControl.ComputeLayout");
Vector2 to = m_ControlPoints[m_ControlPoints.Length - 1];
Vector2 from = m_ControlPoints[0];
Rect rect = new Rect(Vector2.Min(to, from), new Vector2(Mathf.Abs(from.x - to.x), Mathf.Abs(from.y - to.y)));
// Make sure any control points (including tangents, are included in the rect)
for (int i = 1; i < m_ControlPoints.Length - 1; ++i)
{
if (!rect.Contains(m_ControlPoints[i]))
{
Vector2 pt = m_ControlPoints[i];
rect.xMin = Math.Min(rect.xMin, pt.x);
rect.yMin = Math.Min(rect.yMin, pt.y);
rect.xMax = Math.Max(rect.xMax, pt.x);
rect.yMax = Math.Max(rect.yMax, pt.y);
}
}
if (m_GraphView == null)
{
m_GraphView = GetFirstAncestorOfType<GraphView>();
}
//Make sure that we have the place to display Edges with EdgeControl.k_MinEdgeWidth at the lowest level of zoom.
float margin = Mathf.Max(edgeWidth * 0.5f + 1, EdgeControl.k_MinEdgeWidth / m_GraphView.minScale);
rect.xMin -= margin;
rect.yMin -= margin;
rect.width += margin;
rect.height += margin;
if (layout != rect)
{
layout = rect;
m_RenderPointsDirty = true;
}
Profiler.EndSample();
}
static Material s_LineMat;
static Material lineMat
{
get
{
if (s_LineMat == null)
s_LineMat = new Material(EditorGUIUtility.LoadRequired("GraphView/AAEdge.shader") as Shader);
return s_LineMat;
}
}
internal virtual void DrawEdge(IStylePainter painter)
{
var stylePainter = (IStylePainterInternal)painter;
if (!DrawUsingUIVertices(stylePainter))
stylePainter.DrawImmediate(Draw);
}
void Draw()
{
if (edgeWidth <= 0)
return;
UpdateRenderPoints();
Vector2[] points = controlPoints;
Color inputColor = this.inputColor;
Color outputColor = this.outputColor;
inputColor *= UIElementsUtility.editorPlayModeTintColor;
outputColor *= UIElementsUtility.editorPlayModeTintColor;
float realWidth = edgeWidth;
if (realWidth * m_GraphView.scale < k_MinEdgeWidth)
{
realWidth = k_MinEdgeWidth / m_GraphView.scale;
// make up for bigger edge by fading it.
inputColor.a = outputColor.a = edgeWidth / realWidth;
}
if (m_MeshDirty || m_Mesh == null)
{
m_MeshDirty = false;
RecomputeMesh();
}
// Send the view zoom factor so that the antialias width do not grow when zooming in.
lineMat.SetFloat("_ZoomFactor", m_GraphView.scale * realWidth / edgeWidth * EditorGUIUtility.pixelsPerPoint);
// Send the view zoom correction so that the vertex shader can scale the edge triangles when below m_MinWidth.
lineMat.SetFloat("_ZoomCorrection", realWidth / edgeWidth);
lineMat.SetColor("_InputColor", (QualitySettings.activeColorSpace == ColorSpace.Linear) ? inputColor.gamma : inputColor);
lineMat.SetColor("_OutputColor", (QualitySettings.activeColorSpace == ColorSpace.Linear) ? outputColor.gamma : outputColor);
lineMat.SetPass(0);
Graphics.DrawMeshNow(m_Mesh, Matrix4x4.identity);
}
bool DrawUsingUIVertices(IStylePainterInternal painter)
{
if (edgeWidth <= 0)
return true;
UpdateRenderPoints();
if (m_RenderPoints.Count == 0)
return true; // Don't draw anything
Color inColor = this.inputColor;
Color outColor = this.outputColor;
inColor *= UIElementsUtility.editorPlayModeTintColor;
outColor *= UIElementsUtility.editorPlayModeTintColor;
uint cpt = (uint)m_RenderPoints.Count;
uint wantedLength = (cpt) * 2;
uint indexCount = (wantedLength - 2) * 3;
NativeSlice<Vertex> vertices;
NativeSlice<UInt16> indices;
var meshParams = MeshStylePainterParameters.GetDefault(null, wantedLength, indexCount);
meshParams.uvIsDisplacement = true; // We store displacement data in the UV channel
painter.DrawMesh(MeshStylePainterParameters.GetDefault(null, wantedLength, indexCount), out vertices, out indices);
if (vertices.Length == 0)
return false;
float polyLineLength = 0;
for (int i = 1; i < cpt; ++i)
polyLineLength += (m_RenderPoints[i - 1] - m_RenderPoints[i]).sqrMagnitude;
float halfWidth = edgeWidth * 0.5f;
float currentLength = 0;
float flags = (float)VertexFlags.LastType;
Vector2 unitPreviousSegment = Vector2.zero;
for (int i = 0; i < cpt; ++i)
{
Vector2 dir;
Vector2 unitNextSegment = Vector2.zero;
Vector2 nextSegment = Vector2.zero;
if (i < cpt - 1)
{
nextSegment = (m_RenderPoints[i + 1] - m_RenderPoints[i]);
unitNextSegment = nextSegment.normalized;
}
if (i > 0 && i < cpt - 1)
{
dir = unitPreviousSegment + unitNextSegment;
dir.Normalize();
}
else if (i > 0)
{
dir = unitPreviousSegment;
}
else
{
dir = unitNextSegment;
}
Vector2 pos = m_RenderPoints[i];
Vector2 uv = new Vector2(dir.y * halfWidth, -dir.x * halfWidth); // Normal scaled by half width
Color32 tint = Color.LerpUnclamped(outColor, inColor, currentLength / polyLineLength);
int index = i * 2;
vertices[index] = new Vertex()
{
position = new Vector3(pos.x, pos.y, 1), uv = uv, tint = tint, flags = flags
};
vertices[index + 1] = new Vertex()
{
position = new Vector3(pos.x, pos.y, -1), uv = uv, tint = tint, flags = flags
};
if (i < cpt - 2)
{
currentLength += nextSegment.sqrMagnitude;
}
else
{
currentLength = polyLineLength;
}
unitPreviousSegment = unitNextSegment;
}
// Fill triangle indices as it is a triangle strip
for (uint i = 0; i < wantedLength - 2; ++i)
{
int index = (int)(i * 3);
if ((i & 0x01) == 0)
{
indices[index] = (UInt16)i;
indices[index + 1] = (UInt16)(i + 1);
indices[index + 2] = (UInt16)(i + 2);
}
else
{
indices[index] = (UInt16)(i + 1);
indices[index + 1] = (UInt16)i;
indices[index + 2] = (UInt16)(i + 2);
}
}
return true;
}
private void RecomputeMesh()
{
int cpt = m_RenderPoints.Count;
float polyLineLength = 0;
for (int i = 1; i < cpt; ++i)
{
polyLineLength += (m_RenderPoints[i - 1] - m_RenderPoints[i]).sqrMagnitude;
}
if (m_Mesh == null)
{
m_Mesh = new Mesh();
m_Mesh.hideFlags = HideFlags.HideAndDontSave;
}
Vector3[] vertices = m_Mesh.vertices;
Vector2[] uvs = m_Mesh.uv;
Vector3[] normals = m_Mesh.normals;
bool newIndices = false;