ru:: detect cross

rogueviz/ru/classes.cpp

@@ -297,7 +297,7 @@ struct entity {
 struct statdata {
   statarray<ld> stats;
   int jump_control, coyote_time, hallucinating;
-  ld detect_area;
+  ld detect_area, detect_cross;
   void reset();
   vector<tuple<power*, mod, int>> mods;
   };

rogueviz/ru/man.cpp

@@ -42,6 +42,7 @@ void statdata::reset() {
   coyote_time = 0;
   jump_control = 0;
   detect_area = 0;
+  detect_cross = 0;
   hallucinating = false;
   mods.clear();
   }
@@ -87,8 +88,23 @@ void man::act() {
   }
 
 bool man::can_see(entity& e) {
-  ld d = hdist(to_hyper(m.where), to_hyper(e.where));
+  if(m.current.detect_area) {
-  return d < inverse_wvolarea_auto(m.current.detect_area);
+    ld d = hdist(to_hyper(m.where), to_hyper(e.where));
+    if(d < inverse_wvolarea_auto(m.current.detect_area)) return true;
+    }
+  if(m.current.detect_cross) {
+    array<int, 4> ar;
+    transmatrix T = iso_inverse(eupush(to_hyper(m.where)));
+    auto bb = e.get_pixel_bbox();
+    for(int u=0; u<4; u++) {
+      xy vertex = { ld((u&1) ? bb.minx : bb.maxx), ld((u&2) ? bb.miny : bb.maxy) };
+      hyperpoint h = T * to_hyper(vertex);
+      ar[u] = (h[0] > 0 ? 1 : 0) + (h[1] > 0 ? 2 : 0);
+      if(hdist0(h) > m.next.detect_cross) ar[u] = 4;
+      }
+    if(ar[0] != ar[1] || ar[0] != ar[2] || ar[0] != ar[3]) return true;
+    }
+  return false;
   }
 
 void man::on_kill() {

rogueviz/ru/randeff.cpp

@@ -45,6 +45,10 @@ randeff trap_detect("Detect traps", "Lets you see traps and secret passages in a
     }
   });
 
+randeff trap_detect_cross("Detect cross", "Lets you see traps and secret passages in a cross around you.", "You see things you could not see before!", [] (data &d) {
+  m.next.detect_cross = m.current.detect_cross + 0.01 / game_fps * m.current.stats[stat::wis];
+  });
+
 randeff trap_snake("Snake Hair", "Lets you create snakes that can be used to disarm traps and secret passages.", "You grow snakes on your head!", [] (data &d) { });
 randeff trap_disarm("Disarm traps", "Lets you see all traps on the level for a short time, and to attack them with your [weapon] to destroy them.", "You suddenly feel able to disarm traps with your [weapon]!", [] (data &d) { });
 

rogueviz/ru/render.cpp

@@ -272,6 +272,21 @@ void man::draw() {
       }
     queuecurve(scrm, 0x800080, 0, PPR::LINE);
     }
+
+  if(m.current.detect_cross > 0) for(int d: {0, 1, 2, 3}) {
+    transmatrix T = eupush(to_hyper(m.where)) * spin(90._deg * d);
+    ld dist = 0;
+    while(dist < m.current.detect_cross) {
+      dist += 0.01;
+      auto h = from_hyper(T * xpush0(dist));
+      curvepoint(eupush(h.x, h.y) * C0);
+      int cx = int(h.x / block_x);
+      int cy = int(h.y / block_y);
+      if(cx < 0 || cy < 0 || cx >= room_x || cy >= room_y) break;
+      if(!(walls[current_room->at(cx, cy)].flags & W_TRANS)) break;
+      }
+    queuecurve(scrm, 0x800080, 0, PPR::LINE);
+    }
   }
 
 void render_room_objects(room *r) {