Initial commit. WIP blur implementation. Grid struct is tentatively ready. Model struct is in its nascency.

src/model.rs

@@ -0,0 +1,32 @@
+use crate::grid::Grid;
+
+/// A single Physarum agent. The x and y positions are continuous, hence we use floating point
+/// numbers instead of integers.
+#[derive(Debug)]
+pub struct Agent {
+    pub x: f32,
+    pub y: f32,
+    pub angle: f32,
+}
+
+/// A model configuration. We make it into a separate type, because we will eventually have multiple
+/// configurations in one model.
+#[derive(Debug)]
+pub struct PopulationConfig {
+    pub sensor_angle: f32,
+    pub sensor_distance: f32,
+    pub rotation_angle: f32,
+    pub step_distance: f32,
+    pub decay_factor: f32,
+}
+
+impl PopulationConfig {}
+
+/// Top-level simulation class.
+#[derive(Debug)]
+pub struct Model {
+    grid: Grid,
+    agents: Vec<Agent>,
+
+    config: PopulationConfig,
+}