Add hp, Add attack collision detection, Add destroy on death

2023-09-26 22:34:42 +10:00
parent 589d56dd82
commit 5e441e1a13
3 changed files with 34 additions and 0 deletions
@@ -815,6 +815,36 @@ void FP_Update(TELY_Platform *platform, FP_Game *game, TELY_PlatformInput *input
                entity->local_pos += delta_pos;
            }
        }
+        
+        // NOTE: Attack collisions =================================================================
+        {
+            // NOTE: Check if there's an active attack box
+            if (entity->attack_box_size.x != 0 && entity->attack_box_size.y != 0) {
+                Dqn_Rect entity_attack_box = {};
+                // NOTE: Convert from centre origin to top-left origin
+                entity_attack_box.pos  = entity->local_pos + entity->attack_box_offset - (entity->attack_box_size * 0.5f);
+                entity_attack_box.size = entity->attack_box_size;
+
+                for (FP_GameEntityIterator target_it = {}; FP_Game_DFSPreOrderWalkEntityTree(game, &target_it, game->root_entity);) {
+                    FP_GameEntity *target = target_it.entity;
+                    if (target->handle == entity->handle)
+                        continue;
+
+                    // TODO(josh): This check should be updated based on an entity attackable flag
+                    if (target->flags & FP_GameEntityFlag_Attackable) {
+                        Dqn_Rect target_world_hit_box = FP_Game_CalcEntityWorldHitBox(game, target->handle);
+
+                        if (Dqn_Rect_Intersects(entity_attack_box, target_world_hit_box)) {
+                            target->hp -= 1;
+
+                            if (target->hp <= 0) {
+                                FP_Game_DeleteEntity(game, target->handle);
+                            }
+                        }
+                    }
+                }
+            }
+        }

        // NOTE: Move entity by mouse ==============================================================
        if (game->active_entity == entity->handle && entity->flags & FP_GameEntityFlag_MoveByMouse) {