From bdf2497f46b5727ac255c24f6b3b49114966376c Mon Sep 17 00:00:00 2001
From: Kelsi <kelsihates2fa@gmail.com>
Date: Thu, 7 May 2026 11:59:52 -0700
Subject: [PATCH] feat(editor): paint roads to/from selected objects/NPCs
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The path tool gains a "Append selected <object|NPC> as path point"
button that captures the currently-selected entity's world position
into pathPoints_. Workflow: place an inn + a town hall, select inn
→ click append, select town hall → click append, click Apply Path.
The road is then drawn between the two object positions.

When no object/NPC is selected, the button area shows a hint
instead. The button auto-kicks pathCapture_ from None into Waiting*
on first use so the user doesn't have to remember the setup
sequence.

Works with the multi-point polyline path tool from the previous
commit — append three or more objects to route a road through them
in order.
---
 tools/editor/editor_ui.cpp | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/tools/editor/editor_ui.cpp b/tools/editor/editor_ui.cpp
index c3ff775b..cdf39983 100644
--- a/tools/editor/editor_ui.cpp
+++ b/tools/editor/editor_ui.cpp
@@ -1032,6 +1032,40 @@ void EditorUI::renderBrushPanel(EditorApp& app) {
             ImGui::SliderFloat("Width##path", &pathWidth_, 2.0f, 50.0f);
             if (pathMode_ == 0) ImGui::SliderFloat("Depth##path", &pathDepth_, 1.0f, 30.0f);
 
+            // "Painting roads to/from models" — append the position of
+            // the currently-selected object or NPC as a path waypoint.
+            // Common workflow: place inn + town hall, select inn → click
+            // append, select town hall → click append, click Apply Path.
+            // The path then runs between them as a road.
+            const auto* selObj = app.getObjectPlacer().getSelected();
+            const auto* selNpc = app.getNpcSpawner().getSelected();
+            const char* srcLabel = selObj ? "object" :
+                                    selNpc ? "NPC" : nullptr;
+            glm::vec3 srcPos(0);
+            if (selObj) srcPos = selObj->position;
+            else if (selNpc) srcPos = selNpc->position;
+            if (srcLabel) {
+                std::string btn = std::string("Append selected ") + srcLabel +
+                                   " as path point";
+                if (ImGui::Button(btn.c_str(), ImVec2(-1, 0))) {
+                    // setPathPoint only acts when capture is in one of
+                    // its waiting states. If we're idle, kick to
+                    // WaitingStart for the first append; subsequent
+                    // appends progress through Waiting* automatically.
+                    if (pathCapture_ == PathCapture::None) {
+                        pathCapture_ = pathPoints_.empty()
+                                       ? PathCapture::WaitingStart
+                                       : PathCapture::WaitingMore;
+                    }
+                    setPathPoint(srcPos);
+                    app.showToast("Path point added at selected " +
+                                   std::string(srcLabel));
+                }
+            } else {
+                ImGui::TextColored(ImVec4(0.6f, 0.6f, 0.6f, 1),
+                    "Select an object or NPC to append its position as a path point.");
+            }
+
             if (pathCapture_ == PathCapture::None && pathPoints_.empty()) {
                 if (ImGui::Button("Click Start Point", ImVec2(-1, 0))) {
                     pathCapture_ = PathCapture::WaitingStart;