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feat(editor): road flattener tool alongside river carver

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- River/Road Carver section now has two modes:
  - River: carves a channel below terrain (existing)
  - Road: flattens terrain to interpolated height between start/end
- Road mode smoothly transitions height along the path with quadratic
  falloff at edges for natural embankment shape
- Set Start → Set End + Apply workflow works for both modes
- Roads follow terrain slope by interpolating between start/end heights
- Pair with Paint mode to add cobblestone/dirt texture on the road
This commit is contained in:
Kelsi 2026-05-05 06:37:54 -07:00
parent d253aed635
commit 3ac40d27ad
3 changed files with 71 additions and 17 deletions
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41
tools/editor/editor_ui.cpp
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@ -484,29 +484,36 @@ void EditorUI::renderBrushPanel(EditorApp& app) {
}
ImGui::Separator();
if (ImGui::CollapsingHeader("River / Path Carver")) {
static glm::vec3 riverStart{0}, riverEnd{0};
static float riverWidth = 8.0f, riverDepth = 5.0f;
static bool riverStartSet = false;
ImGui::SliderFloat("Width##river", &riverWidth, 2.0f, 50.0f);
ImGui::SliderFloat("Depth##river", &riverDepth, 1.0f, 30.0f);
if (ImGui::CollapsingHeader("River / Road Carver")) {
static glm::vec3 pathStart{0}, pathEnd{0};
static float pathWidth = 8.0f, pathDepth = 5.0f;
static bool pathStartSet = false;
static int pathMode = 0; // 0=river, 1=road
ImGui::RadioButton("River (carve down)", &pathMode, 0);
ImGui::SameLine();
ImGui::RadioButton("Road (flatten)", &pathMode, 1);
ImGui::SliderFloat("Width##path", &pathWidth, 2.0f, 50.0f);
if (pathMode == 0) ImGui::SliderFloat("Depth##path", &pathDepth, 1.0f, 30.0f);
auto& brush4 = app.getTerrainEditor().brush();
if (ImGui::Button("Set Start##river", ImVec2(120, 0)) && brush4.isActive()) {
riverStart = brush4.getPosition();
riverStartSet = true;
app.showToast("River start set");
if (ImGui::Button("Set Start##path", ImVec2(120, 0)) && brush4.isActive()) {
pathStart = brush4.getPosition();
pathStartSet = true;
app.showToast("Path start set");
}
ImGui::SameLine();
if (ImGui::Button("Set End + Carve##river", ImVec2(140, 0)) && brush4.isActive() && riverStartSet) {
riverEnd = brush4.getPosition();
app.getTerrainEditor().carveRiver(riverStart, riverEnd, riverWidth, riverDepth);
app.showToast("River carved");
riverStartSet = false;
if (ImGui::Button("Set End + Apply##path", ImVec2(140, 0)) && brush4.isActive() && pathStartSet) {
pathEnd = brush4.getPosition();
if (pathMode == 0)
app.getTerrainEditor().carveRiver(pathStart, pathEnd, pathWidth, pathDepth);
else
app.getTerrainEditor().flattenRoad(pathStart, pathEnd, pathWidth);
app.showToast(pathMode == 0 ? "River carved" : "Road flattened");
pathStartSet = false;
}
if (riverStartSet)
if (pathStartSet)
ImGui::TextColored(ImVec4(0.5f, 0.9f, 0.5f, 1), "Start set — click end point");
else
ImGui::TextColored(ImVec4(0.6f, 0.6f, 0.6f, 1), "Set start then end to carve");
ImGui::TextColored(ImVec4(0.6f, 0.6f, 0.6f, 1), "Set start then end to apply");
}
if (ImGui::CollapsingHeader("Mirror Terrain")) {