From f2ab92860558f17663eec06cab48be26635fed3a Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Fri, 17 Apr 2026 00:33:30 +0200
Subject: [PATCH] rogueviz:: edge have arrow_scale

---
 rogueviz/graphs.cpp | 13 +++++++++++++
 rogueviz/rogueviz.h |  1 +
 2 files changed, 14 insertions(+)

diff --git a/rogueviz/graphs.cpp b/rogueviz/graphs.cpp
index 78015002..70c3b1a1 100644
--- a/rogueviz/graphs.cpp
+++ b/rogueviz/graphs.cpp
@@ -661,6 +661,19 @@ void draw_edge(const shiftmatrix &V, cell *c, edgeinfo *ei) {
         storeline(ei->prec, inverse_shift(T, h1), inverse_shift(T, h2));
       }
     
+    if(ei->type->arrow_scale) {
+      auto T2 = gm2 * vd2.m->at;
+      auto T1 = gm1 * vd1.m->at;
+      auto T = inverse_shift(T1, T2);
+      auto X = rspintox(T * C0) * xpush(hdist(T1*C0, T2*C0)/2);
+      auto cs = cgi.scalefactor * ei->type->arrow_scale;
+      curvepoint(xpush0(0.1 * cs));
+      curvepoint(xpush(-0.1 * cs) * ypush0(0.05 * cs));
+      curvepoint(xpush(-0.1 * cs) * ypush0(-0.05 * cs));
+      curvepoint(xpush0(0.1 * cs));
+      queuecurve(gm1 * X, col, col, PPR::STRUCT0);
+      }
+
     const shiftmatrix& T = multidraw ? V : ggmatrix(ei->orig);
 
     queue_prec(T, ei, col);
diff --git a/rogueviz/rogueviz.h b/rogueviz/rogueviz.h
index 558b703e..46dc9fe0 100644
--- a/rogueviz/rogueviz.h
+++ b/rogueviz/rogueviz.h
@@ -54,6 +54,7 @@ namespace rogueviz {
     double visible_from_hi;
     unsigned color, color_hi;
     string name;
+    double arrow_scale = 0;
     };
 
   edgetype *add_edgetype(const string& name);