Assorted minor aesthetic touchups

examples/ferromagnet.rs

@@ -5,11 +5,11 @@ fn main() {
     let width = 500;
     let height = 500;
     let feat_size = 1e-5; // feature size
-    let peak_current = 2.5e5;
+    let peak_current = 2.5e10;
     let conductivity = 1.0e6;
     let mut driver = Driver::new(width, height, feat_size);
-    //driver.set_steps_per_frame(8);
-    driver.set_steps_per_frame(40);
+    driver.set_steps_per_frame(8);
+    //driver.set_steps_per_frame(40);
     driver.add_y4m_renderer("ferromagnet.y4m");
     // driver.add_term_renderer();
     driver.add_measurement(meas::Current(225, 250));

src/driver.rs

@@ -75,7 +75,9 @@ impl Driver {
         }
         self.state.step();
         self.time_spent_stepping += start_time.elapsed().unwrap();
-        info!("fps: {}", (self.state.step_no() as f64) / self.time_spent_stepping.as_secs_f64());
+        if self.state.step_no() % (10*self.steps_per_frame) == 0 {
+            info!("fps: {:6.2}", (self.state.step_no() as f64) / self.time_spent_stepping.as_secs_f64());
+        }
     }
 }
 

src/meas.rs

@@ -62,7 +62,7 @@ impl AbstractMeasurement for Energy {
         let e = state.map_sum(|cell| {
             0.5 * cell.hz() * cell.bz() * dV
         });
-        format!("U = {:.2e}", e)
+        format!("U: {:.2e}", e)
     }
 }
 

src/render.rs

@@ -222,7 +222,7 @@ impl Renderer for ColorTermRenderer {
             })
             .collect();
 
-        println!("{}time: {:.3e} (fr {})", buf, state.time(), state.step_no());
+        println!("{}", buf);
     }
 }