From 8068d0a816b3efd17ebb0dcf468c6d333e3577d3 Mon Sep 17 00:00:00 2001
From: 3gg <3gg@shellblade.net>
Date: Sat, 4 Feb 2023 14:36:02 -0800
Subject: Add support for skeletal animation.

---
 gltfview/src/game.c | 41 +++++++++++++++++++++++++----------------
 gltfview/src/game.h | 11 ++++++-----
 2 files changed, 31 insertions(+), 21 deletions(-)

(limited to 'gltfview')

diff --git a/gltfview/src/game.c b/gltfview/src/game.c
index 612ec67..1db7cba 100644
--- a/gltfview/src/game.c
+++ b/gltfview/src/game.c
@@ -89,13 +89,13 @@ static SceneNode* load_skyquad(Game* game) {
 }
 
 /// Load the 3D scene.
-static bool load_scene(
+static SceneNode* load_scene(
     Game* game, const char* scene_filepath, const char* view_mode) {
   assert(game);
 
   game->camera = gfx_make_camera();
   if (!game->camera) {
-    return false;
+    return 0;
   }
   Camera* camera = gfx_get_camera_camera(game->camera);
   // Sponza.
@@ -105,7 +105,7 @@ static bool load_scene(
 
   SceneNode* sky_light_node = load_skyquad(game);
   if (!sky_light_node) {
-    return false;
+    return 0;
   }
 
   // TODO: Move the debug rendering to the renderer.
@@ -114,16 +114,16 @@ static bool load_scene(
   //   return false;
   // }
 
-  if (!gfx_load_scene(
-          game->gfx, sky_light_node,
-          &(LoadSceneCmd){
-              .origin = SceneFromFile, .filepath = scene_filepath})) {
-    return false;
+  SceneNode* scene_node = gfx_load_scene(
+      game->gfx, sky_light_node,
+      &(LoadSceneCmd){.origin = SceneFromFile, .filepath = scene_filepath});
+  if (!scene_node) {
+    return 0;
   }
 
   gfx_log_node_hierarchy(gfx_get_scene_root(game->scene));
 
-  return true;
+  return scene_node;
 }
 
 /// Load a scene for debugging textures.
@@ -207,13 +207,23 @@ bool game_new(Game* game, int argc, const char** argv) {
     goto cleanup;
   }
 
-  if (!load_scene(game, scene_filepath, view_mode)) {
+  game->root_node = load_scene(game, scene_filepath, view_mode);
+  if (!game->root_node) {
     goto cleanup;
   }
   /*if (!load_texture_debugger_scene(game)) {
     goto cleanup;
   }*/
 
+  Anima* anima = gfx_get_node_anima(game->root_node);
+
+  // const bool play_result = gfx_play_animation(
+  //     anima, &(AnimationPlaySettings){.name = "Defiant stance", .loop =
+  //     false});
+  const bool play_result = gfx_play_animation(
+      anima, &(AnimationPlaySettings){.name = "Walk", .loop = true});
+  assert(play_result);
+
   return true;
 
 cleanup:
@@ -227,12 +237,11 @@ cleanup:
 void game_end(Game* game) { gfx_destroy(&game->gfx); }
 
 void game_update(Game* game, double t, double dt) {
-  game->elapsed += dt;
-  while (game->elapsed >= 1.0) {
-    // LOGD("Tick");
-    usleep(1000);
-    game->elapsed -= 1.0;
-  }
+  // LOGD("Tick");
+
+  Anima* anima = gfx_get_node_anima(game->root_node);
+  gfx_update_animation(anima, t);
+
   // TODO: Compute bounding boxes to then find a good orbit point and radius
   // for each scene.
   const vec3 orbit_point = vec3_make(0, 2, 0);
diff --git a/gltfview/src/game.h b/gltfview/src/game.h
index 92c0885..4aeb5ea 100644
--- a/gltfview/src/game.h
+++ b/gltfview/src/game.h
@@ -4,6 +4,7 @@
 #include <gfx/render_backend.h>
 #include <gfx/renderer.h>
 #include <gfx/scene/camera.h>
+#include <gfx/scene/node.h>
 #include <gfx/scene/scene.h>
 
 #include <stdbool.h>
@@ -13,12 +14,12 @@ static const double game_dt = 1.0 / 60.0;
 
 /// Game state.
 typedef struct {
-  Gfx* gfx;
+  Gfx*           gfx;
   RenderBackend* render_backend;
-  Renderer* renderer;
-  Scene* scene;
-  SceneCamera* camera;
-  double elapsed;
+  Renderer*      renderer;
+  Scene*         scene;
+  SceneCamera*   camera;
+  SceneNode*     root_node;
 } Game;
 
 bool game_new(Game*, int argc, const char** argv);
-- 
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