nilrider:: reduce quality feature

rogueviz/nilrider/level.cpp

@@ -95,6 +95,7 @@ void level::init_shapes() {
     int prec = 16;
     if(s == 2) prec *= 4;
     int cdiv = prec / steps_per_block;
+    prec >>= reduce_quality;
     
     bool need_uniltinf = uniltinf.tvertices.empty();
     

rogueviz/nilrider/nilrider.cpp

@@ -545,6 +545,7 @@ auto celldemo = arg::add3("-unilcycle", initialize) + arg::add3("-unilplan", []
   + arg::add3("-nilgeo", nil_set_geodesic)
   + arg::add3("-nilper", nil_set_perspective)
   + arg::add3("-nilrider", initialize_all)
+  + arg::add3("-nilrider-q", [] { arg::shift(); reduce_quality = arg::argi(); })
   + addHook(hooks_configfile, 100, [] {
     param_f(aimspeed_key_x, "nilrider_key_x")
     ->editable(-5, 5, 0.1, "navigation sensitivity (keyboard)", "press Left/Right to navigate (lCtrl to fine-tune)", 'n');

rogueviz/nilrider/nilrider.h

@@ -206,5 +206,7 @@ extern int reversals;
 extern bool loaded_or_planned;
 extern bool planning_mode;
 
+inline int reduce_quality = 0;
+
 void save();
 }

rogueviz/nilrider/timestamp.cpp

@@ -15,7 +15,7 @@ EX hyperpoint sym_to_heis(hyperpoint H) {
   }
 
 void timestamp::draw_unilcycle(const shiftmatrix& V) {
-  const int points = 60;
+  const int points = 60 / (1 + reduce_quality);
   const int spoke_each = 5;
   hyperpoint whpoint[points+1];