camera follow player + lerp

code/apps/client/source/camera.c

@@ -3,6 +3,8 @@
 #include "entity_view.h"
 #include "game.h"
 
+#define CAMERA_LERP_FACTOR 0.06
+
 static camera main_camera;
 
 void camera_reset(void) {
@@ -13,11 +15,13 @@ void camera_reset(void) {
 void camera_update(void) {
     switch (main_camera.mode) {
         case CAMERA_MODE_FOLLOW: {
-            entity_view *view = entity_view_get(game_world_view_get_active(), main_camera.ent_id);
+            world_view *world = game_world_view_get_active();
+            if (!world) break;
+            entity_view *view = entity_view_get(&world->entities, main_camera.ent_id);
             if (!view) break;
             
-            main_camera.x = view->x;
-            main_camera.y = view->y;
+            main_camera.x = zpl_lerp(main_camera.x, view->x, CAMERA_LERP_FACTOR);
+            main_camera.y = zpl_lerp(main_camera.y, view->y, CAMERA_LERP_FACTOR);
         }break;
         
         default: {

code/apps/client/source/game.c

@@ -71,6 +71,16 @@ world_view *game_world_view_get_active(void) {
     return active_viewer;
 }
 
+void game_world_view_set_active_by_idx(uint16_t idx) {
+    ZPL_ASSERT(idx >= 0 && idx < zpl_buffer_count(world_viewers));
+    game_world_view_set_active(&world_viewers[idx]);
+}
+
+void game_world_view_set_active(world_view *view) {
+    active_viewer = view;
+    camera_set_follow(view->owner_id);
+}
+
 void flecs_dash_init() {
     ECS_IMPORT(world_ecs(), FlecsDash);
     ECS_IMPORT(world_ecs(), FlecsSystemsCivetweb);
@@ -131,6 +141,7 @@ void game_update() {
 }
 
 void game_render() {
+    camera_update();
     platform_render();
 }
 

code/common/game.h

@@ -12,4 +12,6 @@ void game_update();
 void game_render();
 
 world_view *game_world_view_get_active(void);
-world_view *game_world_view_get(uint16_t idx);
+world_view *game_world_view_get(uint16_t idx);
+void game_world_view_set_active_by_idx(uint16_t idx);
+void game_world_view_set_active(world_view *view);

code/common/packets/pkt_01_welcome.c

@@ -37,5 +37,6 @@ int32_t pkt_01_welcome_handler(pkt_header *header) {
 
     zpl_printf("[INFO] initializing read-only world view ...\n");
     world_view_init(view, table.ent_id, table.block_size, table.chunk_size, table.world_size);
+    game_world_view_set_active(view);
     return 0;
 }