From 21a8f87f98edfa6c7680b72761e3b46cbdd883c1 Mon Sep 17 00:00:00 2001
From: doyle <doyle.github.2ifxi@simplelogin.com>
Date: Sun, 8 Oct 2023 18:02:10 +1100
Subject: [PATCH] fp: Add terry ghost mode

---
 feely_pona.cpp               | 35 ++++++++++++++++++++++++++++++++++-
 feely_pona_entity.h          |  1 +
 feely_pona_entity_create.cpp |  4 ++++
 3 files changed, 39 insertions(+), 1 deletion(-)

diff --git a/feely_pona.cpp b/feely_pona.cpp
index be3ff9f..517f106 100644
--- a/feely_pona.cpp
+++ b/feely_pona.cpp
@@ -193,7 +193,7 @@ static void FP_Game_MoveEntity(FP_Game *game, FP_GameEntityHandle entity_handle,
                 case FP_EntityType_Terry: {
                     // NOTE: Don't collide with mobs when dashing (e.g. phase through)
                     FP_EntityTerryState state = *DQN_CAST(FP_EntityTerryState *)&entity->action.state;
-                    if (state == FP_EntityTerryState_Dash) {
+                    if (state == FP_EntityTerryState_Dash || state == FP_EntityTerryState_DeadGhost) {
                         if (collider->type == FP_EntityType_Smoochie || collider->type == FP_EntityType_Clinger || collider->type == FP_EntityType_Catfish)
                             entity_collides_with_collider = false;
                     }
@@ -597,6 +597,11 @@ void FP_EntityActionStateMachine(FP_Game *game, TELY_Audio *audio, TELY_Platform
                 }
             }
 
+            if (entity->hp <= 0 && *state != FP_EntityTerryState_DeadGhost) {
+                FP_Game_EntityTransitionState(game, entity, FP_EntityTerryState_DeadGhost);
+                break;
+            }
+
             switch (*state) {
                 case FP_EntityTerryState_Idle: {
                     if (entering_new_state) {
@@ -748,6 +753,26 @@ void FP_EntityActionStateMachine(FP_Game *game, TELY_Audio *audio, TELY_Platform
                         entity->action.sprite_alpha = 1.f;
                     }
                 } break;
+
+                case FP_EntityTerryState_DeadGhost: {
+                    if (entering_new_state) {
+                        uint64_t duration_ms = FP_GAME_ENTITY_ACTION_INFINITE_TIMER;
+                        FP_Game_EntityActionReset(game, entity->handle, duration_ms, render_data.sprite);
+                        entity->action.sprite_play_once = true;
+                        entity->faction                 = FP_GameEntityFaction_Nil;
+                    }
+
+                    Dqn_f32 hp_t = entity->hp / DQN_CAST(Dqn_f32)entity->hp_cap;
+                    if (hp_t >= 0.9f)
+                        entity->action.sprite_alpha = Dqn_PCG32_NextF32(&game->play.rng);
+
+                    if (entity->hp >= entity->hp_cap) {
+                        entity->faction = FP_GameEntityFaction_Friendly;
+                        entity->action.sprite_alpha = 1.f;
+                        entity->action.sprite_play_once = false;
+                        FP_Game_EntityTransitionState(game, entity, FP_EntityTerryState_Idle);
+                    }
+                } break;
             }
         } break;
 
@@ -1431,6 +1456,14 @@ void FP_Update(TELY_Platform *platform, FP_Game *game, TELY_PlatformInput *input
                         case FP_EntityType_Terry: {
                             auto *state = DQN_CAST(FP_EntityTerryState *)&entity->action.state;
                             move_entity = *state == FP_EntityTerryState_Run || *state == FP_EntityTerryState_Idle;
+                            if (*state == FP_EntityTerryState_DeadGhost) {
+                                FP_GameEntityAction const *action = &entity->action;
+                                uint64_t const elapsed_ms         = game->play.clock_ms - action->started_at_clock_ms;
+                                uint16_t const raw_anim_frame     = DQN_CAST(uint16_t)(elapsed_ms / action->sprite.anim->ms_per_frame);
+                                if (raw_anim_frame >= action->sprite.anim->count) {
+                                    move_entity = true;
+                                }
+                            }
                         } break;
 
                         case FP_EntityType_Smoochie: {
diff --git a/feely_pona_entity.h b/feely_pona_entity.h
index 9b6d6ee..6f31a8b 100644
--- a/feely_pona_entity.h
+++ b/feely_pona_entity.h
@@ -34,6 +34,7 @@ enum FP_EntityTerryState
     FP_EntityTerryState_RangeAttack,
     FP_EntityTerryState_Run,
     FP_EntityTerryState_Dash,
+    FP_EntityTerryState_DeadGhost,
 };
 
 enum FP_EntityMobSpawnerState
diff --git a/feely_pona_entity_create.cpp b/feely_pona_entity_create.cpp
index f3e1854..5b2328c 100644
--- a/feely_pona_entity_create.cpp
+++ b/feely_pona_entity_create.cpp
@@ -76,6 +76,10 @@ FP_EntityRenderData FP_Entity_GetRenderData(FP_Game *game, FP_EntityType type, u
                         case FP_GameDirection_Count: DQN_INVALID_CODE_PATH; break;
                     }
                 } break;
+
+                case FP_EntityTerryState_DeadGhost: {
+                    result.anim_name = g_anim_names.terry_death; break;
+                } break;
             }
         } break;