From 85925d69e08455bd91d32a27cd3690c9cb634a6b Mon Sep 17 00:00:00 2001
From: Graham Northup <grissess@nexusg.org>
Date: Mon, 18 Sep 2017 23:12:14 -0400
Subject: Initial work on modular synthesis

---
 src/synth/math.rs | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 src/synth/math.rs

(limited to 'src/synth/math.rs')

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
+    }
+}
-- 
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