From 8388a448e789869ce0c3416d0328bcddf267a9ca Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Sat, 11 May 2019 17:20:57 +0200
Subject: [PATCH] 3d:: an option to limit cell generation

---
 config.cpp     |  9 +++++++++
 hyper.h        |  1 +
 hypgraph.cpp   | 10 ++++++++--
 screenshot.cpp |  1 +
 4 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/config.cpp b/config.cpp
index df0bfaff..bf739336 100644
--- a/config.cpp
+++ b/config.cpp
@@ -355,6 +355,7 @@ void initConfig() {
   addsaver(vid.smart_range_detail, "smart-range-detail", 8);
   addsaver(vid.smart_range_detail_3, "smart-range-detail", 30);
   addsaver(vid.cells_drawn_limit, "limit on cells drawn", 10000);
+  addsaver(vid.cells_generated_limit, "limit on cells generated", 25);
   
   addsaver(vid.skiprope, "mobius", 0);
   
@@ -629,6 +630,14 @@ void add_cells_drawn(char c = 'C') {
       );
     dialog::scaleLog();
     });
+  if(WDIM == 3 || vid.use_smart_range == 2) {
+    dialog::addSelItem(XLAT("limit generation per frame"), its(vid.cells_generated_limit), 'L');
+    dialog::add_action([] () { 
+      dialog::editNumber(vid.cells_generated_limit, 1, 1000, log(10), 25, XLAT("limit generation per frame"), 
+        XLAT("In the 3D mode, lowering this value may help if the game lags while exploring new areas.")
+        );
+      });
+    }
   }
 
 void edit_sightrange() {
diff --git a/hyper.h b/hyper.h
index fb577edc..99f52f54 100644
--- a/hyper.h
+++ b/hyper.h
@@ -1160,6 +1160,7 @@ struct videopar {
   ld smart_range_detail;// minimum visible cell for modes 1 and 2
   ld smart_range_detail_3;// minimum visible cell in 3D (for mode 2, there is no mode 1)
   int cells_drawn_limit;
+  int cells_generated_limit; // limit on cells generated per frame
   
   ld skiprope;
 
diff --git a/hypgraph.cpp b/hypgraph.cpp
index 969caf73..145c7722 100644
--- a/hypgraph.cpp
+++ b/hypgraph.cpp
@@ -1272,7 +1272,7 @@ void panning(hyperpoint hf, hyperpoint ht) {
   playermoved = false;
   }
 
-int cells_drawn;
+int cells_drawn, cells_generated;
 
 void fullcenter() {
   conformal::path_for_lineanimation.clear();
@@ -1690,6 +1690,8 @@ bool do_draw(cell *c, const transmatrix& T) {
     if(cells_drawn > vid.cells_drawn_limit) return false;
     if(vid.use_smart_range) {
       if(cells_drawn >= 50 && !in_smart_range(T)) return false;
+      if(c->mpdist > 7 && cells_generated > vid.cells_generated_limit) return false;
+      cells_generated++;
       setdist(c, 7, c);
       }
     else {
@@ -1720,7 +1722,11 @@ bool do_draw(cell *c, const transmatrix& T) {
   if(cells_drawn > vid.cells_drawn_limit) return false;
   bool usr = vid.use_smart_range || quotient || euwrap;
   if(usr && cells_drawn >= 50 && !in_smart_range(T)) return false;
-  if(vid.use_smart_range == 2) setdist(c, 7, c);
+  if(vid.use_smart_range == 2) {
+    if(cells_generated > vid.cells_generated_limit) return false;
+    setdist(c, 7, c);
+    cells_generated++;
+    }
   return true; 
   }
 
diff --git a/screenshot.cpp b/screenshot.cpp
index a5d6a753..d153954e 100644
--- a/screenshot.cpp
+++ b/screenshot.cpp
@@ -312,6 +312,7 @@ void take(string fname, const function<void()>& what) {
   dynamicval<bool> v2(inHighQual, true);
   dynamicval<bool> v6(auraNOGL, true);
   dynamicval<bool> vn(nohud, nohud || hide_hud);
+  dynamicval<int> cgl(vid.cells_generated_limit, 9999999);
 
   vid.smart_range_detail *= multiplier;
   darken = 0;