1 files changed, 18 insertions, 0 deletions

diff --git a/geometry.h b/geometry.h
new file mode 100644
index 0000000..509ec7e
--- /dev/null
+++ b/geometry.h
@@ -0,0 +1,18 @@
+#pragma once
+
+typedef struct {
+  int x;
+  int y;
+} LPoint;
+
+typedef struct {
+  LPoint p0;
+  LPoint p1;
+} LLine;
+
+// dist is a fixed point with precission of 8 bits
+// offs is where on the line segment xy0-xy1 the point's normale hits,
+// range 0..65536 (but can extend, if normale hits line outside line segment)
+int dist_pl(LPoint const * p, LLine const * l, int * offs);
+int dist_pp(LPoint const * p0, LPoint const * p1);
+