Add very basic structure for opticscenery

Cargo.lock

@@ -2,6 +2,47 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "autocfg"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+
+[[package]]
+name = "fixedbitset"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ce7134b9999ecaf8bcd65542e436736ef32ddca1b3e06094cb6ec5755203b80"
+
+[[package]]
+name = "hashbrown"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
+
+[[package]]
+name = "indexmap"
+version = "1.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bd070e393353796e801d209ad339e89596eb4c8d430d18ede6a1cced8fafbd99"
+dependencies = [
+ "autocfg",
+ "hashbrown",
+]
+
 [[package]]
 name = "opossum"
 version = "0.1.0"
+dependencies = [
+ "petgraph",
+]
+
+[[package]]
+name = "petgraph"
+version = "0.6.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4dd7d28ee937e54fe3080c91faa1c3a46c06de6252988a7f4592ba2310ef22a4"
+dependencies = [
+ "fixedbitset",
+ "indexmap",
+]

Cargo.toml

@@ -11,3 +11,4 @@ categories = [ "science", "simulation"]
 publish = false
 
 [dependencies]
+petgraph = "0.6.3" # the graph library
\ No newline at end of file

examples/opticscenery.rs

+use opossum::opticscenery::*;
+
+fn main() {
+  println!("opticscenery example");
+  println!("default opticscenery: {:?}",Opticscenery::default());
+}

src/lib.rs

+pub mod opticscenery;
\ No newline at end of file

src/opticscenery.rs

+use petgraph::prelude::DiGraph;
+
+#[derive(Default, Debug)]
+pub struct Opticscenery {
+  g: DiGraph<i32,()>
+}
\ No newline at end of file