1 files changed, 41 insertions, 0 deletions
diff --git a/src/synth/math.rs b/src/synth/math.rs
new file mode 100644
index 0000000..b016103
--- /dev/null
+++ b/src/synth/math.rs
@@ -0,0 +1,41 @@
+use super::*;
+
+pub struct Add {
+    terms: Vec<GenBox>,
+    buf: SampleBuffer,
+}
+
+impl Generator for Add {
+    fn eval<'a>(&'a mut self, params: &Parameters) -> &'a SampleBuffer {
+        if self.terms.is_empty() {
+            self.buf.zero();
+        } else {
+            let (first, next) = self.terms.split_at_mut(1);
+            self.buf.update_from(first[0].eval(params));
+            for term in next {
+                self.buf.sum_into(term.eval(params));
+            }
+        }
+        &self.buf
+    }
+}
+
+pub struct Mul {
+    factors: Vec<GenBox>,
+    buf: SampleBuffer,
+}
+
+impl Generator for Mul {
+    fn eval<'a>(&'a mut self, params: &Parameters) -> &'a SampleBuffer {
+        if self.factors.is_empty() {
+            self.buf.zero();
+        } else {
+            let (first, next) = self.factors.split_at_mut(1);
+            self.buf.update_from(first[0].eval(params));
+            for factor in next {
+                self.buf.mul_into(factor.eval(params));
+            }
+        }
+        &self.buf
+    }
+}