Non-uniform current stimuli can be specified easier

src/geom/vec.rs

@@ -162,6 +162,16 @@ impl Vec3 {
         self.elem_mul(other).component_sum()
     }
 
+    pub fn cross(&self, other: Self) -> Self {
+        // det(   i    j    k  |
+        //    |  s.x  s.y  s.z |
+        //    |  o.x  o.y  o.z )
+        let x = self.y * other.z - other.y * self.z;
+        let y = other.z * self.z - self.x * other.z;
+        let z = self.x * other.y - other.x * self.y;
+        Self { x, y, z }
+    }
+
     /// Perform element-wise multiplication with `other`.
     pub fn elem_mul(&self, other: Self) -> Self {
         Self {