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feat(editor): PNG/JPG/BMP heightmap image import, undo for all imports

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- importHeightmapImage(): loads any resolution PNG/JPG/BMP/TGA via
  stb_image, supports both 8-bit and 16-bit precision, maps to terrain
  vertices with bilinear coordinate mapping
- Both image import and RAW import now wrapped with undo
  (recordGeneratorUndo/commitGeneratorUndo)
- UI: File > Import Heightmap now offers "Import Image" (any format)
  and "Import RAW" (binary) as separate options
- Enables professional terrain workflows: paint in Photoshop/GIMP,
  generate in World Machine/Gaea, import directly as terrain
This commit is contained in:
Kelsi 2026-05-05 15:42:35 -07:00
parent 33042c3a47
commit 36dc9ddef7
3 changed files with 77 additions and 7 deletions
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19
tools/editor/editor_ui.cpp
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@ -327,17 +327,24 @@ void EditorUI::renderMenuBar(EditorApp& app) {
ImGui::EndMenu();
}
if (ImGui::BeginMenu("Import Heightmap", app.hasTerrainLoaded())) {
static char hmPath[256] = "heightmap.raw";
static char hmPath[256] = "heightmap.png";
static float hmScale = 200.0f;
ImGui::InputText("File##hm", hmPath, sizeof(hmPath));
ImGui::SliderFloat("Height Scale", &hmScale, 10.0f, 1000.0f);
ImGui::TextColored(ImVec4(0.6f,0.6f,0.6f,1), "RAW 16-bit or 8-bit (129x129 or 257x257)");
if (ImGui::MenuItem("Import")) {
if (app.getTerrainEditor().importHeightmap(hmPath, hmScale))
app.showToast("Heightmap imported");
if (ImGui::MenuItem("Import Image (PNG/JPG/BMP/TGA)")) {
if (app.getTerrainEditor().importHeightmapImage(hmPath, hmScale))
app.showToast("Heightmap image imported (undoable)");
else
app.showToast("Failed to import heightmap");
app.showToast("Failed — check image path and format");
}
if (ImGui::MenuItem("Import RAW (16/8-bit binary)")) {
if (app.getTerrainEditor().importHeightmap(hmPath, hmScale))
app.showToast("RAW heightmap imported (undoable)");
else
app.showToast("Failed — need 129x129 or 257x257 RAW");
}
ImGui::TextColored(ImVec4(0.5f,0.5f,0.5f,1),
"Supports any resolution PNG/JPG/BMP/TGA or RAW");
ImGui::EndMenu();
}
if (ImGui::MenuItem("Generate Complete Zone", nullptr, false, app.hasTerrainLoaded()))