feat: yaaay first stem

packages/utils/src/geometry/mod.rs

@@ -1,3 +1,34 @@
-pub mod calculate_normals;
-pub mod extrude_path;
+mod calculate_normals;
+mod extrude_path;
 
+pub use calculate_normals::*;
+pub use extrude_path::*;
+
+use crate::log;
+
+#[rustfmt::skip]
+pub fn create_empty_geometry(vertex_amount: usize, face_amount: usize) -> Vec<i32> {
+    log!(
+        "create_empty_geometry: vertex_amount: {}, face_amount: {}",
+        vertex_amount,
+        face_amount
+    );
+
+    let amount = 
+        3 // definition (type, vertex_amount, face_amount)
+      + 4 // opening and closing brackets
+      + vertex_amount * 3  // positions
+      + vertex_amount * 3  // normals
+      + face_amount * 3;    // faces 
+    
+
+    let mut vec: Vec<i32> = vec![0; amount];
+    vec[0] = 0; // opening bracket
+    vec[1] = amount as i32 - 2; // opening bracket
+    vec[2] = 1; // type: geometry
+    vec[3] = vertex_amount as i32;
+    vec[4] = face_amount as i32;
+    vec[amount - 2] = 1; // closing bracket
+    vec[amount - 1] = 1; // closing bracket
+    vec
+}