udpate sick

importer/src/services/mesh_service.rs

@@ -158,12 +158,18 @@ impl MeshGenerationService {
     }
 
     fn generate_road_mesh(points: &[[f32; 2]], lanes: f32, road_type: f32) -> Vec<RoadVertex> {
+        let debug_mesh = std::env::var("DEBUG_MESH").is_ok();
+        
         if points.len() < 2 {
+            if debug_mesh {
+                println!("DEBUG MESH: Too few points ({})", points.len());
+            }
             return Vec::new();
         }
 
         // Compute normals for each segment
         let mut segment_normals = Vec::with_capacity(points.len() - 1);
+        let mut degenerate_count = 0;
         for i in 0..points.len() - 1 {
             let p1 = points[i];
             let p2 = points[i + 1];
@@ -172,10 +178,15 @@ impl MeshGenerationService {
             let len = (dx * dx + dy * dy).sqrt();
             if len < 0.000001 {
                 segment_normals.push([0.0, 0.0]);
+                degenerate_count += 1;
             } else {
                 segment_normals.push([-dy / len, dx / len]);
             }
         }
+        
+        if debug_mesh && degenerate_count > 0 {
+            println!("DEBUG MESH: {}/{} segments degenerate", degenerate_count, segment_normals.len());
+        }
 
         // Generate vertex pairs with miter joins
         let mut point_pairs = Vec::with_capacity(points.len() * 2);
@@ -233,8 +244,10 @@ impl MeshGenerationService {
 
         // Triangulate
         let mut triangle_vertices = Vec::with_capacity((points.len() - 1) * 6);
+        let mut skipped = 0;
         for i in 0..points.len() - 1 {
             if Self::dot(segment_normals[i], segment_normals[i]) == 0.0 {
+                skipped += 1;
                 continue;
             }
 
@@ -255,6 +268,11 @@ impl MeshGenerationService {
             triangle_vertices.push(v3);
         }
 
+        if debug_mesh {
+            println!("DEBUG MESH: Generated {} vertices from {} points (skipped {} segments)", 
+                triangle_vertices.len(), points.len(), skipped);
+        }
+
         triangle_vertices
     }