From 2b8b24e3f5135a9517fe8fe70e22822171b22ba0 Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Sun, 22 Jun 2025 16:03:07 +0200
Subject: [PATCH] rogueviz:: ads:: ship_history_period

---
 rogueviz/ads/display.cpp | 4 ++++
 rogueviz/ads/ds-game.cpp | 4 ++++
 rogueviz/ads/globals.cpp | 2 ++
 rogueviz/ads/views.cpp   | 6 +++++-
 4 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/rogueviz/ads/display.cpp b/rogueviz/ads/display.cpp
index 793d1eec..ec0c7c94 100644
--- a/rogueviz/ads/display.cpp
+++ b/rogueviz/ads/display.cpp
@@ -190,8 +190,12 @@ void draw_game_cell(const cell_to_draw& cd) {
     if(rock.type != oParticle) view_time(shiftless(rgpushxto0(rock.pt_main.h)), rock.pt_main.shift, 0xFFFFFF);
     }
 
+  ld last_shown = -HUGE_VAL;
   if(paused || which_cross) if(hv) for(auto& rock: ci.shipstates) {
 
+    if(rock.start < last_shown + ship_history_period) continue;
+    last_shown = rock.start;
+
     render_ship_parts([&] (const hpcshape& sh, color_t col, int sym) {
       int dx = sym ? -1 : 1;
       for(int i=sh.s; i<sh.e; i++) {
diff --git a/rogueviz/ads/ds-game.cpp b/rogueviz/ads/ds-game.cpp
index 737f899a..353167db 100644
--- a/rogueviz/ads/ds-game.cpp
+++ b/rogueviz/ads/ds-game.cpp
@@ -628,7 +628,11 @@ void view_ds_game() {
       }      
 
     ld delta = paused ? 1e-4 : -1e-4;
+    ld last_shown = -100;
+    vector<ld> times;
     if(paused) for(auto& ss: history) {
+      if(ss.start < last_shown + ship_history_period) continue;
+      last_shown = ss.start; times.push_back(ss.start);
       if(ss.at.shift < current.shift - 4 * TAU) continue;
       if(ss.at.shift > current.shift + 4 * TAU) continue;
 
diff --git a/rogueviz/ads/globals.cpp b/rogueviz/ads/globals.cpp
index c8dcafbe..07e184b6 100644
--- a/rogueviz/ads/globals.cpp
+++ b/rogueviz/ads/globals.cpp
@@ -58,6 +58,8 @@ bool view_proper_times = false;
 /** format for displaying time */
 const char *tformat = "%.2f";
 
+ld ship_history_period = 0;
+
 void game_menu();
 void restart();
 void change_scale(ld s);
diff --git a/rogueviz/ads/views.cpp b/rogueviz/ads/views.cpp
index 1440216a..2796184b 100644
--- a/rogueviz/ads/views.cpp
+++ b/rogueviz/ads/views.cpp
@@ -206,6 +206,10 @@ auto view_hooks =
 + arg::add3("-ads-replay", [] { arg::shift(); int i = arg::argi(); if(i != in_replay) switch_replay(); })
 + arg::add3("-ads-duality", [] { arg::shift(); use_duality = arg::argi(); })
 + arg::add3("-ads-cone", [] { arg::shift(); which_cross = arg::argi(); })
-+ arg::add3("-ads-spacetime", [] { arg::shift(); switch_spacetime_to(arg::argi()); });
++ arg::add3("-ads-ship-history", [] { arg::shift_arg_formula(ship_history_period); })
++ arg::add3("-ads-spacetime", [] { arg::shift(); switch_spacetime_to(arg::argi());
+  pmodel = mdRelPerspective;
+  use_duality = 0;
+  });
 
 }}