Pass model path from command line argument

Author: Nelarius

.vscode/launch.json

@@ -9,7 +9,9 @@
             "type": "cppdbg",
             "request": "launch",
             "program": "${workspaceFolder}/build/pt",
-            "args": [],
+            "args": [
+                "../assets/Duck.glb"
+            ],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}/build",
             "environment": [],
@@ -33,7 +35,9 @@
             "type": "cppvsdbg",
             "request": "launch",
             "program": "${workspaceFolder}/build/Debug/pt.exe",
-            "args": [],
+            "args": [
+                "../../assets/Duck.glb"
+            ],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}/build/Debug",
             "environment": [],

src/bvh-visualizer/main.cpp

@@ -14,9 +14,17 @@ using namespace nlrs;
 
 inline constexpr Extent2i imageSize = Extent2i{1280, 720};
 
-int main()
+void printHelp() { std::cout << "Usage: bvh-visualizer <input_gltf_file>\n" << std::endl; }
+
+int main(int argc, char** argv)
 {
-    const nlrs::GltfModel model("Duck.glb");
+    if (argc != 2)
+    {
+        printHelp();
+        return 0;
+    }
+
+    const nlrs::GltfModel model(argv[1]);
     const nlrs::Bvh       bvh = nlrs::buildBvh(
         model.positions(), model.normals(), model.texCoords(), model.baseColorTextureIndices());
 

src/pt/main.cpp

@@ -18,15 +18,23 @@
 inline constexpr int defaultWindowWidth = 640;
 inline constexpr int defaultWindowHeight = 480;
 
-int main()
+void printHelp() { std::printf("Usage: pt <input_gltf_file>\n"); }
+
+int main(int argc, char** argv)
 {
+    if (argc != 2)
+    {
+        printHelp();
+        return 0;
+    }
+
     nlrs::Window window{nlrs::WindowDescriptor{
         .windowSize = nlrs::Extent2i{defaultWindowWidth, defaultWindowHeight},
         .title = "pt-playground 🛝",
     }};
 
     {
-        const nlrs::GltfModel model("Duck.glb");
+        const nlrs::GltfModel model(argv[1]);
         const nlrs::Bvh       bvh = nlrs::buildBvh(
             model.positions(), model.normals(), model.texCoords(), model.baseColorTextureIndices());
 

src/textractor/main.cpp

@@ -2,11 +2,20 @@
 #include <common/texture.hpp>
 
 #include <cassert>
+#include <cstdio>
 #include <fstream>
 
-int main()
+void printHelp() { std::printf("Usage: textractor <input_gltf_file>\n"); }
+
+int main(int argc, char** argv)
 {
-    const nlrs::GltfModel model("Duck.glb");
+    if (argc != 2)
+    {
+        printHelp();
+        return 0;
+    }
+
+    nlrs::GltfModel model(argv[1]);
 
     const auto baseColorTextures = model.baseColorTextures();
     for (std::size_t textureIdx = 0; textureIdx < baseColorTextures.size(); ++textureIdx)