Add project files.

assets/entities.def

@@ -0,0 +1,22 @@
+# Hammer++ custom entity definitions. Loaded on start-up after the built-in set, so you can add
+# your game's entities here - or redefine a built-in class by repeating its name.
+#
+#   @point <class> "<label>" [color(r,g,b)] [size(h) | size(hx,hy,hz)] [dir] [model]
+#   @brush <class> "<label>" [color(r,g,b)] [contents(solid|clip|trigger|water|sky)]
+#     <key> <type> "<label>" "<default>" ["value=Label,value=Label"]
+#   types: string int float bool color255 vec3 choice model material target
+#   dir = shows an orientation arrow, model = displays the "model" key as a prop
+
+@point npc_spawner "NPC spawner" color(255,110,110) size(12,32,12) dir
+  npc_type choice "NPC type" "grunt" "grunt=Grunt,sniper=Sniper,boss=Boss"
+  count int "Count" "3"
+  respawn bool "Respawn" "0"
+  patrol_target target "Patrol path start" ""
+
+@point env_fog "Fog volume" color(180,200,230) size(10)
+  color color255 "Fog color" "180 190 210"
+  start float "Start distance" "256"
+  end float "End distance" "2048"
+
+@brush trigger_hurt "Hurt trigger" color(255,60,60) contents(trigger)
+  damage float "Damage per second" "10"