rename CellStateWithM => Fields; parameterize Sample over R

crates/coremem/src/sim/mod.rs

@@ -81,19 +81,29 @@ pub type GenericSim<R> = SpirvSim<R, FullyGenericMaterial<R>, CpuBackend>;
 ///           +------------+------------+
 ///
 #[derive(Clone, Default, Serialize, Deserialize)]
-pub struct Sample {
-    state: CellStateWithM<f32>,
-    conductivity: Vec3<f32>,
+pub struct Sample<R=f32> {
+    state: Fields<R>,
+    conductivity: Vec3<R>,
 }
 
 #[derive(Copy, Clone, Debug, Default, PartialEq, Serialize, Deserialize)]
-pub struct CellStateWithM<R> {
+pub struct Fields<R> {
     e: Vec3<R>,
     h: Vec3<R>,
     m: Vec3<R>,
 }
 
-impl<R: Real> CellStateWithM<R> {
+impl<R: Real> Fields<R> {
+    pub fn new(e: Vec3<R>, h: Vec3<R>, m: Vec3<R>) -> Self {
+        Self { e, h, m }
+    }
+    pub fn cast<R2: Real>(&self) -> Fields<R2> {
+        Fields {
+            e: self.e.cast(),
+            h: self.h.cast(),
+            m: self.m.cast(),
+        }
+    }
     pub fn e(&self) -> Vec3<R> {
         self.e
     }