Half overlay

TLM/TLM/Manager/Impl/LaneArrowManager.cs

@@ -319,15 +319,20 @@ public static void SeparateSegmentLanes(ushort segmentId, ushort nodeId, out Set
                 if (numdirs < 2) {
                     return; // no junction
                 }
+                bool lht = LaneArrowManager.Instance.Services.SimulationService.TrafficDrivesOnLeft;
 
                 if (srcLaneCount == 2 && numdirs == 3) {
-                    LaneArrowManager.Instance.SetLaneArrows(laneList[0].laneId, LaneArrows.LeftForward);
-                    LaneArrowManager.Instance.SetLaneArrows(laneList[1].laneId, LaneArrows.Right);
+                    if (!lht) {
+                        LaneArrowManager.Instance.SetLaneArrows(laneList[0].laneId, LaneArrows.LeftForward);
+                        LaneArrowManager.Instance.SetLaneArrows(laneList[1].laneId, LaneArrows.Right);
+                    }else {
+                        LaneArrowManager.Instance.SetLaneArrows(laneList[1].laneId, LaneArrows.ForwardRight);
+                        LaneArrowManager.Instance.SetLaneArrows(laneList[0].laneId, LaneArrows.Left);
+                    }
                     return;
                 }
 
                 int l = 0, f = 0, r = 0;
-                bool lht = LaneArrowManager.Instance.Services.SimulationService.TrafficDrivesOnLeft;
                 if (numdirs == 2) {
                     if (!lht) {
                         //if traffic drives on right, then favour the more difficult left turns.

TLM/TLM/UI/SubTool.cs

@@ -1,4 +1,4 @@
-namespace TrafficManager.UI {
+namespace TrafficManager.UI {
     using ColossalFramework.UI;
     using JetBrains.Annotations;
     using Textures;
@@ -78,12 +78,12 @@ private Texture2D BorderlessTexture {
 
         private GUIStyle borderlessStyle_;
 
-        protected ushort HoveredNodeId {
+        protected virtual ushort HoveredNodeId {
             get => TrafficManagerTool.HoveredNodeId;
             set => TrafficManagerTool.HoveredNodeId = value;
         }
 
-        protected ushort HoveredSegmentId {
+        protected virtual ushort HoveredSegmentId {
             get => TrafficManagerTool.HoveredSegmentId;
             set => TrafficManagerTool.HoveredSegmentId = value;
         }

TLM/TLM/UI/SubTools/LaneArrowTool.cs

@@ -6,6 +6,7 @@ namespace TrafficManager.UI.SubTools {
     using GenericGameBridge.Service;
     using Manager.Impl;
     using State;
+    using TrafficManager.API.Traffic.Data;
     using UnityEngine;
 
     public class LaneArrowTool : SubTool {
@@ -41,7 +42,7 @@ public override void OnPrimaryClickOverlay() {
                 LaneArrowManager.SeparateTurningLanes.SeparateSegmentLanes(HoveredSegmentId, HoveredNodeId, out res);
             } else if (ctrlDown) {
                 LaneArrowManager.SeparateTurningLanes.SeparateNode(HoveredNodeId, out res);
-            } else {
+            } else if (HasHoverLaneArrows()) {
                 SelectedSegmentId = HoveredSegmentId;
                 SelectedNodeId = HoveredNodeId;
             }
@@ -108,20 +109,89 @@ public override void OnToolGUI(Event e) {
             cursorInSecondaryPanel_ = windowRect3.Contains(Event.current.mousePosition);
         }
 
+        /// <summary>
+        /// Determines whether or not the hovered segment end has lane arrows.
+        /// </summary>
+        private bool HasHoverLaneArrows() => HasSegmentEndLaneArrows(HoveredSegmentId, HoveredNodeId);
+
+        /// <summary>
+        /// determines whether or not the given segment end has lane arrows.
+        /// </summary>
+        private bool HasSegmentEndLaneArrows(ushort segmentId, ushort nodeId) {
+            if(nodeId == 0 || segmentId == 0) {
+                return false;
+            }
+#if DEBUG
+            if(!Constants.ServiceFactory.NetService.IsNodeValid(nodeId) ||
+               !Constants.ServiceFactory.NetService.IsSegmentValid(segmentId)) {
+                Debug.LogError("Invalid node or segment ID");
+            }
+#endif
+            ExtSegmentEndManager segEndMan = ExtSegmentEndManager.Instance;
+            ExtSegmentEnd segEnd = segEndMan.ExtSegmentEnds[segEndMan.GetIndex(segmentId, nodeId)];
+            NetNode[] nodesBuffer = Singleton<NetManager>.instance.m_nodes.m_buffer;
+            bool bJunction = (nodesBuffer[nodeId].m_flags & NetNode.Flags.Junction) != 0;
+
+            // Outgoing lanes toward the node is incomming lanes to the segment end.
+            return bJunction && segEnd.incoming;
+        }
+
+        protected override ushort HoveredNodeId {
+        get {
+                // if the current segment end does not have lane arrows
+                // and the other end of the segment does have lane arrows, then
+                // assume the user intends to hover over that one.
+                // This code makes it easier to hover over small segments.
+                if (!HasSegmentEndLaneArrows(HoveredSegmentId, base.HoveredNodeId))
+                {
+                    ref NetSegment segment = ref Singleton<NetManager>.instance.m_segments.m_buffer[HoveredSegmentId];
+                    ushort otherNodeId = segment.GetOtherNode(base.HoveredNodeId);
+                    if (HasSegmentEndLaneArrows(HoveredSegmentId, otherNodeId)) {
+                        return otherNodeId;
+                    }
+                }
+                return base.HoveredNodeId;
+            }
+            set => base.HoveredNodeId = value;
+        }
+
+        /// <summary>
+        /// Draws a half sausage to highlight the segment end.
+        /// </summary>
+        private void DrawSegmentEnd(
+                       RenderManager.CameraInfo cameraInfo,
+                       ushort segmentId,
+                       bool bStartNode,
+                       Color color,
+                       bool alpha = false) {
+            ref NetSegment segment = ref Singleton<NetManager>.instance.m_segments.m_buffer[segmentId];
+
+            // if only one side of the segment has lane arrows then the length of the
+            // is 1. but the highlight still looks like a sausage which is cut at one end.
+            // this is important to give user visual feedback which area is hoverable.
+            bool con =
+                HasSegmentEndLaneArrows(segmentId, segment.m_startNode) ^
+                HasSegmentEndLaneArrows(segmentId, segment.m_endNode);
+            float cut = con ? 1f : 0.5f;
+
+            MainTool.DrawCutSegmentEnd(cameraInfo, segmentId, cut, bStartNode, color, alpha);
+        }
+
         public override void RenderOverlay(RenderManager.CameraInfo cameraInfo) {
             NetManager netManager = Singleton<NetManager>.instance;
 
             bool ctrlDown = Input.GetKey(KeyCode.LeftControl) || Input.GetKey(KeyCode.RightControl);
             bool altDown = Input.GetKey(KeyCode.LeftAlt) || Input.GetKey(KeyCode.RightAlt);
-
-            if (ctrlDown) {
+            bool PrimaryDown = Input.GetMouseButton(0);
+            if (ctrlDown && !cursorInSecondaryPanel_ && (HoveredNodeId != 0)) {
                 // draw hovered node
                 MainTool.DrawNodeCircle(cameraInfo, HoveredNodeId, Input.GetMouseButton(0));
                 return;
             }
 
             // Log._Debug($"LaneArrow Overlay: {HoveredNodeId} {HoveredSegmentId} {SelectedNodeId} {SelectedSegmentId}");
             if (!cursorInSecondaryPanel_
+                && HasHoverLaneArrows()
                 && (HoveredSegmentId != 0)
                 && (HoveredNodeId != 0)
                 && ((HoveredSegmentId != SelectedSegmentId)
@@ -131,28 +201,20 @@ public override void RenderOverlay(RenderManager.CameraInfo cameraInfo) {
 
                 if (((netManager.m_segments.m_buffer[HoveredSegmentId].m_startNode == HoveredNodeId)
                      || (netManager.m_segments.m_buffer[HoveredSegmentId].m_endNode == HoveredNodeId))
-                    && ((nodeFlags & NetNode.Flags.Junction) != NetNode.Flags.None))
-                {
-                    NetTool.RenderOverlay(
-                        cameraInfo,
-                        ref Singleton<NetManager>.instance.m_segments.m_buffer[HoveredSegmentId],
-                        MainTool.GetToolColor(altDown, false),
-                        MainTool.GetToolColor(altDown, false));
+                    && ((nodeFlags & NetNode.Flags.Junction) != NetNode.Flags.None)) {
+                    bool bStartNode = (bool)Constants.ServiceFactory.NetService.IsStartNode(HoveredSegmentId, HoveredNodeId);
+                    Color color = MainTool.GetToolColor(PrimaryDown, false);
+                    bool alpha = !altDown;
+                    DrawSegmentEnd(cameraInfo, HoveredSegmentId, bStartNode, color, alpha);
                 }
             }
 
-            if (SelectedSegmentId == 0) return;
-
-            Color color;
-            if (altDown && HoveredSegmentId == SelectedSegmentId)
-                color = MainTool.GetToolColor(true, true);
-            else
-                color = MainTool.GetToolColor(true, false);
-            NetTool.RenderOverlay(
-                cameraInfo,
-                ref Singleton<NetManager>.instance.m_segments.m_buffer[SelectedSegmentId],
-                color,
-                color);
+            if (SelectedSegmentId != 0) {
+                Color color = MainTool.GetToolColor(true, false);
+                bool bStartNode = (bool)Constants.ServiceFactory.NetService.IsStartNode(SelectedSegmentId, SelectedNodeId);
+                bool alpha = !altDown && HoveredSegmentId == SelectedSegmentId;
+                DrawSegmentEnd(cameraInfo, SelectedSegmentId, bStartNode, color, alpha);
+            }
         }
 
         private void GuiLaneChangeWindow(int num) {

TLM/TLM/UI/TrafficManagerTool.cs

@@ -1,4 +1,4 @@
-namespace TrafficManager.UI {
+namespace TrafficManager.UI {
     using System;
     using System.Collections.Generic;
     using System.Linq;
@@ -410,57 +410,102 @@ protected override void OnToolGUI(Event e) {
             }
         }
 
+
         public void DrawNodeCircle(RenderManager.CameraInfo cameraInfo,
                                    ushort nodeId,
                                    bool warning = false,
                                    bool alpha = false) {
             DrawNodeCircle(cameraInfo, nodeId, GetToolColor(warning, false), alpha);
         }
 
+        /// <summary>
+        /// Gets the coordinates of the given node.
+        /// </summary>
+        private static Vector3 GetNodePos(ushort nodeId) {
+            NetNode[] nodeBuffer = Singleton<NetManager>.instance.m_nodes.m_buffer;
+            Vector3 pos = nodeBuffer[nodeId].m_position;
+            float terrainY = Singleton<TerrainManager>.instance.SampleDetailHeightSmooth(pos);
+            if (terrainY > pos.y) {
+                pos.y = terrainY;
+            }
+            return pos;
+        }
+
+        /// <returns>the average half width of all connected segments</returns>
+        private static float CalculateNodeRadius(ushort nodeId) {
+
+            float sum_half_width = 0;
+            int count = 0;
+            Constants.ServiceFactory.NetService.IterateNodeSegments(
+                nodeId,
+                (ushort segmentId, ref NetSegment segment) => {
+                    sum_half_width += segment.Info.m_halfWidth;
+                    count++;
+                    return true;
+                });
+            return sum_half_width / count;
+        }
+
         public void DrawNodeCircle(RenderManager.CameraInfo cameraInfo,
                                    ushort nodeId,
                                    Color color,
                                    bool alpha = false) {
-            NetNode[] nodesBuffer = Singleton<NetManager>.instance.m_nodes.m_buffer;
-            NetSegment segment =
-                Singleton<NetManager>.instance.m_segments.m_buffer[ nodesBuffer[nodeId].m_segment0];
+            float r = CalculateNodeRadius(nodeId);
+            Vector3 pos = Singleton<NetManager>.instance.m_nodes.m_buffer[nodeId].m_position;
+            DrawOverlayCircle(cameraInfo, color, pos, r * 2, alpha);
+        }
 
-            Vector3 pos = nodesBuffer[nodeId].m_position;
-            float terrainY = Singleton<TerrainManager>.instance.SampleDetailHeightSmooth(pos);
-            if (terrainY > pos.y) {
-                pos.y = terrainY;
+        /// <summary>
+        /// Draws a half sausage at segment end.
+        /// </summary>
+        /// <param name="segmentId"></param>
+        /// <param name="cut">The lenght of the highlight [0~1] </param>
+        /// <param name="bStartNode">Determines the direction of the half sausage.</param>
+        public void DrawCutSegmentEnd(RenderManager.CameraInfo cameraInfo,
+                       ushort segmentId,
+                       float cut,
+                       bool bStartNode,
+                       Color color,
+                       bool alpha = false) {
+            if( segmentId == 0) {
+                return;
             }
+            ref NetSegment segment = ref Singleton<NetManager>.instance.m_segments.m_buffer[segmentId];
+            float width = segment.Info.m_halfWidth;
+            ushort nodeId, otherNodeId;
+
+
+            NetNode[] nodeBuffer = Singleton<NetManager>.instance.m_nodes.m_buffer;
+            bool IsMiddle(ushort nodeId) => (nodeBuffer[nodeId].m_flags & NetNode.Flags.Middle) != 0;
 
             Bezier3 bezier;
-            bezier.a = pos;
-            bezier.d = pos;
+            bezier.a = GetNodePos(segment.m_startNode);
+            bezier.d = GetNodePos(segment.m_endNode);
 
             NetSegment.CalculateMiddlePoints(
                 bezier.a,
                 segment.m_startDirection,
                 bezier.d,
                 segment.m_endDirection,
-                false,
-                false,
+                IsMiddle(segment.m_startNode),
+                IsMiddle(segment.m_endNode),
                 out bezier.b,
                 out bezier.c);
 
-            DrawOverlayBezier(cameraInfo, bezier, color, alpha);
-        }
+            if (bStartNode) {
+                bezier = bezier.Cut(0, cut);
+            } else {
+                bezier = bezier.Cut(1 - cut, 1);
+            }
 
-        private void DrawOverlayBezier(RenderManager.CameraInfo cameraInfo,
-                                       Bezier3 bezier,
-                                       Color color,
-                                       bool alpha = false) {
-            const float width = 8f; // 8 - small roads; 16 - big roads
             Singleton<ToolManager>.instance.m_drawCallData.m_overlayCalls++;
             Singleton<RenderManager>.instance.OverlayEffect.DrawBezier(
                 cameraInfo,
                 color,
                 bezier,
                 width * 2f,
-                width,
-                width,
+                bStartNode ? 0 : width,
+                bStartNode ? width : 0,
                 -1f,
                 1280f,
                 false,