From 776f5199e95a40be4dc47c358065605dde66c899 Mon Sep 17 00:00:00 2001
From: Alexander Shishkin <alex@ash.works>
Date: Mon, 7 Oct 2024 06:32:57 +0300
Subject: [PATCH] character: Add start to idle animation sequence

If "start" and "start_to_idle" animations are set up, put the character
in "start" until motion controls wake it up and play "start_to_idle"
before transitioning to "idle" and motion controls become available.

Signed-off-by: Alexander Shishkin <alex@ash.works>
---
 core/character.c | 22 ++++++++++++++++++++++
 core/character.h |  7 +++++++
 core/scene.c     |  8 ++++++++
 3 files changed, 37 insertions(+)

diff --git a/core/character.c b/core/character.c
index 8a64244..5d5e8ea 100644
--- a/core/character.c
+++ b/core/character.c
@@ -159,6 +159,15 @@ bool character_is_grounded(struct character *ch, struct scene *s)
     return false;
 }
 
+static void character_idle(struct scene *s, void *priv)
+{
+    struct character *c = priv;
+
+    c->state = CS_AWAKE;
+    anictl_set_state(&c->anictl, 0);
+    animation_push_by_name(c->entity, s, "idle", true, true);
+}
+
 void character_move(struct character *ch, struct scene *s)
 {
     struct phys_body *body = ch->entity->phys_body;
@@ -185,6 +194,18 @@ void character_move(struct character *ch, struct scene *s)
     }
 
     ch->ragdoll = body ? !phys_body_ground_collide(body) : 0;
+
+    if (ch->state == CS_START) {
+        if (ch->mctl.ls_dx || ch->mctl.ls_dy) {
+            ch->state = CS_WAKING;
+            animation_push_by_name(ch->entity, s, "start_to_idle", true, false);
+            animation_set_end_callback(ch->entity, character_idle, ch);
+        }
+        return;
+    } else if (ch->state < CS_AWAKE) {
+        return;
+    }
+
     if (ch->ragdoll) {
         dJointSetLMotorParam(body->lmotor, dParamVel1, 0);
         dJointSetLMotorParam(body->lmotor, dParamVel2, 0);
@@ -453,6 +474,7 @@ struct character *character_new(struct model3dtx *txm, struct scene *s)
     c->entity->priv = c;
     c->orig_update = c->entity->update;
     c->entity->update = character_update;
+    c->state = CS_AWAKE;
     list_append(&s->characters, &c->entry);
     motion_reset(&c->mctl, s);
 
diff --git a/core/character.h b/core/character.h
index 0b48e9b..2a9871b 100644
--- a/core/character.h
+++ b/core/character.h
@@ -31,6 +31,12 @@ struct motionctl {
     bool    jump;
 };
 
+enum character_state {
+    CS_START = 0,
+    CS_WAKING,
+    CS_AWAKE
+};
+
 struct character {
     struct ref  ref;
     struct entity3d *entity;
@@ -55,6 +61,7 @@ struct character {
     int     stuck;
     bool    dashing;
     bool    jumping;
+    enum character_state state;
 };
 
 static inline struct entity3d *character_entity(struct character *c)
diff --git a/core/scene.c b/core/scene.c
index 5a8d856..09bdc9a 100644
--- a/core/scene.c
+++ b/core/scene.c
@@ -587,6 +587,14 @@ static int model_new_from_json(struct scene *scene, JsonNode *node)
                     free(m->anis.x[idx].name);
                     m->anis.x[idx].name = strdup(p->key);
                 }
+
+                if (c &&
+                    animation_by_name(e->txmodel->model, "start") >= 0 &&
+                    animation_by_name(e->txmodel->model, "start_to_idle") >= 0) {
+                        c->anictl.state = UINT_MAX;
+                        c->state = CS_START;
+                        animation_push_by_name(e, scene, "start", true, true);
+                }
             }
         }
     } else {