1 files changed, 30 insertions, 0 deletions
diff --git a/src/osc_tri.c b/src/osc_tri.c
new file mode 100644
index 0000000..c4a56f5
--- /dev/null
+++ b/src/osc_tri.c
@@ -0,0 +1,30 @@
+#include "osc.h"
+
+osc_t OSC_tri = {
+  .name = "w_triangle",
+  .start = 0,
+  .end = 2,
+  .len = 2,
+};
+
+float
+tri(int index)
+{
+  if (index == 0) return -1.0f;
+  else if (index == 1) return 1.0f;
+  else return 0.0f;
+}
+
+float
+osc_tri(float offset)
+{
+  return osc_interpolate(offset,
+                         tri((int)offset),
+                         tri(osc_next_index(&OSC_tri, offset)));
+}
+
+float
+osc_tri_next(float f, float offset)
+{
+  return osc_next_offset(&OSC_tri, f, offset);
+}