GRID SNAP!

src/lib.rs

@@ -7,11 +7,35 @@ pub mod create;
 pub mod helpers;
 pub mod modify;
 pub mod ui;
-pub use ui::{action_bar_sys, shape_tree_sys};
 pub use modify::modify_sys;
 pub use create::create_sys;
 pub use helpers::*;
 
+#[derive(Debug, Clone)]
+pub struct SnapGrid {
+    pub width: f32,
+    pub height: f32,
+    pub snap: bool,
+    pub offset: Vec2,
+}
+impl SnapGrid {
+    pub fn snap_to_grid(&self, v: Vec2) -> Vec2 {
+        if self.snap {
+            let w = v - self.offset;
+            let snapped = Vec2::new(w.x - w.x % self.width, w.y - w.y % self.height);
+
+            snapped + self.offset
+        }
+        else {
+            v
+        }
+    }
+}
+impl Default for SnapGrid {
+    fn default() -> Self {
+        Self { width: 15.0, height: 15.0, snap: false, offset: Vec2::ZERO }
+    }
+}
 
 #[derive(Clone, Debug)]
 pub struct PointSize(pub f32);