full pipeline

app/api/convert/route.ts

@@ -13,32 +13,31 @@ export async function POST(req: NextRequest) {
       return NextResponse.json({ error: "No file provided" }, { status: 400 });
     }
 
-    // 1. Setup workspace
     const tempDir = path.join(os.tmpdir(), "xgrids-pipeline");
     await mkdir(tempDir, { recursive: true });
 
-    // FIX: Sanitize filename to avoid shell/path issues with spaces
+    const safeName = file.name.replace(/[^a-z0-9.]/gi, "_").toLowerCase();
-    const safeName = file.name.replace(/[^a-z0-8.]/gi, "_").toLowerCase();
     const timestamp = Date.now();
     const inputPath = path.join(tempDir, `${timestamp}_${safeName}`);
+    const outputPath = inputPath.replace(/\.(lcc|lci|bin)$/i, ".ply");
 
-    // Ensure we replace the extension correctly for the output
+    // DETERMINE WHICH SCRIPT TO RUN
-    const outputPath = inputPath.replace(/\.(lcc|lci)$/i, ".ply");
+    let scriptName = "convert_lci_to_ply.py";
+    if (file.name.toLowerCase().includes("environment.bin")) {
+      scriptName = "convert_env_to_ply.py";
+    }
 
     const scriptPath = path.join(
       process.cwd(),
       "scripts",
       "preprocess",
-      "convert_lci_to_ply.py",
+      scriptName,
     );
 
-    // 2. Write the file
     const buffer = Buffer.from(await file.arrayBuffer());
     await writeFile(inputPath, buffer);
 
-    // 3. Execute Python
     return new Promise<NextResponse>((resolve) => {
-      // spawn handles arguments as an array, which is safer than exec for spaces
       const pythonProcess = spawn("python3", [
         scriptPath,
         inputPath,
@@ -52,14 +51,10 @@ export async function POST(req: NextRequest) {
 
       pythonProcess.on("close", async (code) => {
         if (code !== 0) {
-          console.error("Python Error:", errorOutput);
-          // Cleanup input even on failure
           await unlink(inputPath).catch(() => {});
           return resolve(
             NextResponse.json(
-              {
+              { error: `Python failed (${scriptName}): ${errorOutput}` },
-                error: `Python script failed with code ${code}. ${errorOutput}`,
-              },
               { status: 500 },
             ),
           );
@@ -67,8 +62,6 @@ export async function POST(req: NextRequest) {
 
         try {
           const plyBuffer = await readFile(outputPath);
-
-          // Cleanup
           await Promise.all([
             unlink(inputPath).catch(() => {}),
             unlink(outputPath).catch(() => {}),
@@ -86,7 +79,7 @@ export async function POST(req: NextRequest) {
         } catch (e) {
           resolve(
             NextResponse.json(
-              { error: "Failed to read generated PLY file" },
+              { error: "Failed to read output PLY" },
               { status: 500 },
             ),
           );
@@ -94,7 +87,6 @@ export async function POST(req: NextRequest) {
       });
     });
   } catch (error: any) {
-    console.error("API Route Error:", error);
     return NextResponse.json({ error: error.message }, { status: 500 });
   }
 }

scripts/preprocess/convert_env_to_ply.py

@@ -0,0 +1,90 @@
+#!/usr/bin/env python3
+import argparse
+import struct
+import sys
+from pathlib import Path
+
+def convert_env_to_ply(input_path, output_path, verbose=False):
+    """
+    Parses Xgrids environment.bin using standard library only.
+    Format: 44 bytes per splat (11 little-endian floats).
+    """
+    input_path = Path(input_path)
+    output_path = Path(output_path)
+
+    if not input_path.exists():
+        print(f"✗ Error: File '{input_path}' not found.")
+        sys.exit(1)
+
+    # 44 bytes per point (Position x,y,z | Scale x,y,z | Rotation q1,q2,q3,q4 | Opacity)
+    POINT_SIZE = 44 
+    
+    try:
+        file_size = input_path.stat().st_size
+        num_points = file_size // POINT_SIZE
+
+        if verbose:
+            print("-" * 50)
+            print(f"Input:  {input_path}")
+            print(f"Output: {output_path}")
+            print(f"Size:   {file_size / (1024*1024):.2f} MB")
+            print(f"Points: {num_points:,}")
+            print("-" * 50)
+
+        with open(input_path, "rb") as f_in, open(output_path, "w") as f_out:
+            # 1. Write PLY Header
+            f_out.write("ply\n")
+            f_out.write("format ascii 1.0\n")
+            f_out.write(f"element vertex {num_points}\n")
+            f_out.write("property float x\n")
+            f_out.write("property float y\n")
+            f_out.write("property float z\n")
+            f_out.write("end_header\n")
+
+            # 2. Process Binary in Chunks (to keep RAM usage low)
+            # 10,000 points per chunk is a good balance for standard Python
+            chunk_size = 10000
+            points_processed = 0
+
+            while points_processed < num_points:
+                remaining = num_points - points_processed
+                batch_size = min(chunk_size, remaining)
+                
+                # Read binary chunk
+                chunk_data = f_in.read(batch_size * POINT_SIZE)
+                if not chunk_data:
+                    break
+                
+                # Unpack and write
+                # '<3f' grabs just the first 3 floats (XYZ) and ignores the rest of the 44 bytes
+                for i in range(batch_size):
+                    offset = i * POINT_SIZE
+                    # We only unpack the first 12 bytes (3 floats) of the 44-byte block
+                    x, y, z = struct.unpack_from("<fff", chunk_data, offset)
+                    f_out.write(f"{x:.6f} {y:.6f} {z:.6f}\n")
+                
+                points_processed += batch_size
+                if verbose and points_processed % 50000 == 0:
+                    print(f"• Progress: {points_processed:,} / {num_points:,}")
+
+        print(f"✓ Success! Converted {num_points:,} points.")
+
+    except Exception as e:
+        print(f"✗ Error during conversion: {e}")
+        sys.exit(1)
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(
+        description="Zero-dependency CLI tool to convert Xgrids environment.bin to PLY."
+    )
+    
+    parser.add_argument("input", help="Path to environment.bin")
+    parser.add_argument("output", nargs="?", help="Output .ply path")
+    parser.add_argument("-v", "--verbose", action="store_true", help="Enable logging")
+
+    args = parser.parse_args()
+
+    # Default output logic
+    out_path = Path(args.output) if args.output else Path(args.input).with_suffix(".ply")
+    
+    convert_env_to_ply(args.input, out_path, args.verbose)