From 7ec107dfd8dee21bf60fdeb948ffe040d174d68a Mon Sep 17 00:00:00 2001
From: Joshua Goins <josh@redstrate.com>
Date: Thu, 14 Apr 2022 10:32:41 -0400
Subject: [PATCH] Add level of detail selection in mdlviewer

---
 mdlviewer/include/mainwindow.h |  1 +
 mdlviewer/src/mainwindow.cpp   | 14 +++++++++++++-
 renderer/include/renderer.hpp  |  2 +-
 renderer/src/renderer.cpp      |  4 ++--
 4 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/mdlviewer/include/mainwindow.h b/mdlviewer/include/mainwindow.h
index fde6db0..b545240 100644
--- a/mdlviewer/include/mainwindow.h
+++ b/mdlviewer/include/mainwindow.h
@@ -71,6 +71,7 @@ private:
     std::vector<GearInfo*> loadedGears;
 
     Race currentRace = Race::HyurMidlanderMale;
+    int currentLod = 0;
 
     GameData& data;
 
diff --git a/mdlviewer/src/mainwindow.cpp b/mdlviewer/src/mainwindow.cpp
index 3f115bb..a285428 100644
--- a/mdlviewer/src/mainwindow.cpp
+++ b/mdlviewer/src/mainwindow.cpp
@@ -174,6 +174,18 @@ MainWindow::MainWindow(GameData& data) : data(data) {
 
     controlLayout->addWidget(raceCombo);
 
+    auto lodCombo = new QComboBox();
+    lodCombo->addItem("0");
+    lodCombo->addItem("1");
+    lodCombo->addItem("2");
+
+    connect(lodCombo, qOverload<int>(&QComboBox::currentIndexChanged), [this](int index) {
+        currentLod = index;
+        refreshModel();
+    });
+
+    controlLayout->addWidget(lodCombo);
+
     QPushButton* exportButton = new QPushButton("Export");
 
     connect(exportButton, &QPushButton::clicked, [this] {
@@ -212,7 +224,7 @@ void MainWindow::refreshModel() {
         data.extractFile(resolvedModelPath.toStdString(), "top.mdl");
 
 #ifndef USE_STANDALONE_WINDOW
-        vkWindow->models.push_back(renderer->addModel(parseMDL("top.mdl")));
+        vkWindow->models.push_back(renderer->addModel(parseMDL("top.mdl"), currentLod));
 #else
         standaloneWindow->models.push_back(renderer->addModel(parseMDL("top.mdl")));
 #endif
diff --git a/renderer/include/renderer.hpp b/renderer/include/renderer.hpp
index 3b55d59..62e15e5 100644
--- a/renderer/include/renderer.hpp
+++ b/renderer/include/renderer.hpp
@@ -26,7 +26,7 @@ public:
     bool initSwapchain(VkSurfaceKHR surface, int width, int height);
     void resize(VkSurfaceKHR surface, int width, int height);
 
-    RenderModel addModel(const Model& model);
+    RenderModel addModel(const Model& model, int lod);
 
     void render(std::vector<RenderModel> models);
 
diff --git a/renderer/src/renderer.cpp b/renderer/src/renderer.cpp
index b3b8ae6..14512ac 100644
--- a/renderer/src/renderer.cpp
+++ b/renderer/src/renderer.cpp
@@ -508,11 +508,11 @@ uint32_t Renderer::findMemoryType(uint32_t typeFilter, VkMemoryPropertyFlags pro
     return -1;
 }
 
-RenderModel Renderer::addModel(const Model& model) {
+RenderModel Renderer::addModel(const Model& model, int lod) {
     RenderModel renderModel;
     renderModel.model = model;
 
-    for(auto part : model.lods[0].parts) {
+    for(auto part : model.lods[lod].parts) {
         RenderPart renderPart;
 
         size_t vertexSize = part.vertices.size() * sizeof(Vertex);