Fix the top reflection in the RndWk max

src/dsp/node_rndwk.rs

@@ -128,11 +128,19 @@ impl DspNode for RndWk {
                 let step = denorm::RndWk::step(step, frame).clamp(-1.0, 1.0);
                 let offs = denorm::RndWk::offs(offs, frame).clamp(-1.0, 1.0);
 
-                let target =
+                let mut target =
                     self.slew_val.value() as f32
                     + ((self.rng.next() * 2.0 * step) - step)
                     + offs;
-                self.target = (((target - min) % delta).abs() + min) as f64;
+
+                // println!("{:8.6} {:8.6} {:8.6}", min, max, target);
+                // clamp target into a range we can reflect
+                target = target.clamp(min - (delta * 0.99), max + (delta * 0.99));
+                // reflect back the overshoots:
+                if target > max { target = max - (max - target).abs(); }
+                if target < min { target = min + (min - target).abs(); }
+
+                self.target = target as f64;
             }
 
             let slew_time_ms = denorm::RndWk::slew(slew, frame);

tests/node_rndwk.rs

@@ -152,14 +152,15 @@ fn check_node_rndwk_max() {
     pset_n(&mut matrix, rwk, "trig", 1.0);
     run_for_ms(&mut node_exec, 7.0); // wait for trigger...
 
-    let (out_l, _) = run_for_ms(&mut node_exec, 20.0);
+    let (out_l, _) = run_for_ms(&mut node_exec, 50.0);
-    assert_decimated_feq!(out_l, 60, vec![
+    assert_decimated_feq!(out_l, 200, vec![
         0.0, // start value
         // slew ramp:
-        0.011791383, 0.029931974, 0.04807256, 0.06621315,
+        0.054119427, 0.11458806, 0.1750567, 0.23552532, 0.29599395,
+        0.3564626, 0.4169312,
         // end value
-        // which is 0.5 - 0.56891763
+        // which is (0.5 - 0.43108237) == 0.06891763
-        0.06891763, 0.06891763,
+        0.43108237, 0.43108237, 0.43108237, 0.43108237
     ]);
 }