rogueviz:: projection visualizations have slides

rogueviz/hyperbolic-analogs.cpp

@@ -417,7 +417,47 @@ auto msc = arg::add3("-analogs", enable)
     ->editable(0, 255, 15, "Earth transparency", "", 't');
     param_b(textured, "analogs_texture")
     ->editable("draw Earth", 'T');
-    });
+    })
+  + addHook(rogueviz::pres::hooks_build_rvtour, 131, [] (string s, vector<tour::slide>& v) {
+      if(s != "mixed") return;
+      using namespace tour;
+
+      v.push_back(slide{
+        "projections/Earth and the hyperbolic plane", 10, LEGAL::NONE | QUICKGEO,
+
+        "Cartographers need to project the surface of Earth to a flat paper. However, since the surface of Earth is curved, there is no perfect way to do this. "
+        "Some projections will be conformal (map angles and small shapes faithfully), equidistant (map distances along SOME lines faithfully), equal-area (map areas proportionally), etc., "
+        "but no map will be all at once. Cartographers use many projections.\n\n"
+        
+        "We need these projections because the Earth has positive curvature, while the paper has no curvature. Interestingly, "
+        "most of the popular projections can be generalized, as projections from surface of curvature any K1 to surfaces of any curvature K2!\n\n"
+        
+        "This slide focuses on the hyperbolic analogs of popular spherical projections (projecting H² to E²). "
+        "Press '5' to enable cycling between different projections, or 'o' for more options."
+        ,
+        [] (presmode mode) {
+          slide_url(mode, 'y', "YouTube link (with description)", "https://youtu.be/H7NKhKTjHVE");
+          slide_url(mode, 'm', "HyperRogue page about projections", "http://www.roguetemple.com/z/hyper/models.php");
+          setCanvas(mode, '0');
+          if(mode == pmStart) {
+            enable();
+            start_game();
+            slide_backup(cycle_models);
+            slide_backup(anims::period);
+            }
+          if(mode == pmStop) {
+            dual::disable();
+            start_game();
+            }
+          if(mode == pmKey) {
+            cycle_models = !cycle_models;
+            if(cycle_models) anims::period *= 12;
+            else anims::period /= 12;
+            }
+          }});
+      
+      callhooks(rogueviz::pres::hooks_build_rvtour, "projections", v);
+      });
 
 }
 }

rogueviz/inner-maps.cpp

@@ -243,13 +243,15 @@ void show() {
   dialog::display();
   }
 
-auto hook = arg::add3("-inner-map", [] {
+void enable() {
   using rogueviz::rv_hook;
   rv_hook(hooks_frame, 100, frame);
   rv_hook(hooks_drawcell, 100, render);
   rv_hook(anims::hooks_anim, 100, shift);
   rv_hook(hooks_o_key, 80, [] (o_funcs& v) { v.push_back(named_dialog("inner maps", show)); });
-  }) 
+  }
+
+auto hook = arg::add3("-inner-map", enable) 
   + addHook(hooks_configfile, 100, [] {
     param_f(texture_alpha, "inner_talpha")
     ->editable(0, 5, .1, "texture projection distance", "", 't');
@@ -271,7 +273,31 @@ auto hook = arg::add3("-inner-map", [] {
       "How many times per frame should we re-render the map", 
       'i')
     ->set_reaction(need_redo);
-    });
+    })
+  + addHook(rogueviz::pres::hooks_build_rvtour, 52, [] (string s, vector<tour::slide>& v) {
+      if(s != "projections") return;
+      using namespace tour;
+
+      v.push_back(slide{
+        "projections/hyperbolic to hyperbolic", 10, LEGAL::NONE | QUICKGEO,
+
+        "We can also project a hyperbolic plane to a hyperbolic plane of different curvature.\n\n"
+        "Creatures living in the hyperbolic world may use the native Poincaré model to get conformal, circular, and totally useless maps of their whole world.\n\n"
+        
+        "Press 'o' to change the settings."
+        ,
+        [] (presmode mode) {
+          slide_url(mode, 't', "Twitter link (with description)", "https://twitter.com/zenorogue/status/1212408644941295619");
+          setCanvas(mode, 'r');
+          
+          if(mode == pmStart) {
+            if(!shmup::on) restart_game(rg::shmup);
+            slide_backup(mapeditor::drawplayer, true);
+            enable();
+            start_game();
+            }
+          }});
+      });
 
 }
 }

rogueviz/planets.cpp

@@ -510,7 +510,34 @@ auto msc =
     ->editable(0, 255, 15, "animation alpha max", "", 'm');
     param_f(prec, "moon_precision")
     ->editable(0, 30, .5, "precision", "larger values are less precise", 'p');
-    });
+    })
+  + addHook(rogueviz::pres::hooks_build_rvtour, 51, [] (string s, vector<tour::slide>& v) {
+      if(s != "projections") return;
+      using namespace tour;
+
+      v.push_back(slide{
+        "projections/sphere to sphere", 10, LEGAL::NONE | QUICKGEO,
+
+        "We can also project a sphere to a sphere of different curvature. For example, what about the azimuthal equidistant projection from Earth to Moon? "
+        "This projection correctly maps the angles and distances from a chosen point at Earth. "
+        "Press 'o' to use the place on Earth you are in as the chosen point, try other projections, or change the other settings!"
+        ,
+        [] (presmode mode) {
+          slide_url(mode, 't', "Twitter link (with description)", "https://twitter.com/ZenoRogue/status/1339946298460483589");
+          setCanvas(mode, '0');
+          
+          if(mode == pmStart) {
+            enable();
+            set_geometry(gSphere);
+            slide_backup(canvas_default_wall, waInvisibleFloor);
+            slide_backup(pmodel, mdDisk);
+            slide_backup(pconf.scale, 1000);
+            slide_backup(pconf.alpha, 1000);
+            start_game();
+            slide_backup(max_alpha, 192);
+            }
+          }});
+      });
 
 }
 }