1 files changed, 29 insertions, 0 deletions
diff --git a/src/net_notch.c b/src/net_notch.c
new file mode 100644
index 0000000..608d0b5
--- /dev/null
+++ b/src/net_notch.c
@@ -0,0 +1,29 @@
+
+#include "fracture.h"
+
+void net_notch(net_t *net, double notch_len, cholmod_common *c) {
+	for (uint_t i = 0; i < net->graph->ne; i++) {
+		uint_t v1, v2;
+		double v1x, v1y, v2x, v2y, dx, dy;
+		bool crosses_center, not_wrapping, correct_length;
+
+		v1 = net->graph->ev[2 * i];
+		v2 = net->graph->ev[2 * i + 1];
+
+		v1x = net->graph->vx[2 * v1];
+		v1y = net->graph->vx[2 * v1 + 1];
+		v2x = net->graph->vx[2 * v2];
+		v2y = net->graph->vx[2 * v2 + 1];
+
+		dx = v1x - v2x;
+		dy = v1y - v2y;
+
+		crosses_center = (v1y >= 0.5 && v2y <= 0.5) || (v1y <= 0.5 && v2y >= 0.5);
+		not_wrapping = fabs(dy) < 0.5;
+		correct_length = v1x + dx / dy * (v1y - 0.5) <= notch_len;
+
+		if (crosses_center && not_wrapping && correct_length) {
+			break_edge(net, i, c);
+		}
+	}
+}