1 files changed, 52 insertions, 0 deletions
diff --git a/src/synth/math.rs b/src/synth/math.rs
index 91e58e3..8adad4b 100644
--- a/src/synth/math.rs
+++ b/src/synth/math.rs
@@ -48,3 +48,55 @@ impl Generator for Mul {
         mem::replace(&mut self.buf, buf)
     }
 }
+
+#[derive(Debug)]
+pub struct Negate {
+    pub value: GenBox,
+    pub buf: SampleBuffer,
+}
+
+impl Generator for Negate {
+    fn eval<'a>(&'a mut self, params: &Parameters) -> &'a SampleBuffer {
+        self.buf.update_from(self.value.eval(params));
+        match self.buf.rate {
+            Rate::Sample => {
+                for v in self.buf.iter_mut() {
+                    *v *= -1.0;
+                }
+            },
+            Rate::Control => {
+                self.buf[0] *= -1.0;
+            },
+        }
+        &self.buf
+    }
+    fn set_buffer(&mut self, buf: SampleBuffer) -> SampleBuffer {
+        mem::replace(&mut self.buf, buf)
+    }
+}
+
+#[derive(Debug)]
+pub struct Reciprocate {
+    pub value: GenBox,
+    pub buf: SampleBuffer,
+}
+
+impl Generator for Reciprocate {
+    fn eval<'a>(&'a mut self, params: &Parameters) -> &'a SampleBuffer {
+        self.buf.update_from(self.value.eval(params));
+        match self.buf.rate {
+            Rate::Sample => {
+                for v in self.buf.iter_mut() {
+                    *v = v.powf(-1.0);
+                }
+            },
+            Rate::Control => {
+                self.buf[0] = self.buf[0].powf(-1.0);
+            },
+        }
+        &self.buf
+    }
+    fn set_buffer(&mut self, buf: SampleBuffer) -> SampleBuffer {
+        mem::replace(&mut self.buf, buf)
+    }
+}