twn_util: final cleaning up, introducton of powerful file_read()

apps/demos/scenery/game.c

@@ -30,10 +30,6 @@ void game_tick(void) {
         ctx.debug = !ctx.debug;
     }
 
-    if (input_action_just_pressed("debug_dump_atlases")) {
-        textures_dump_atlases();
-    }
-
     state->scene->tick(state);
 
     /* there's a scene switch pending, we can do it now that the tick is done */

apps/demos/scenery/scenes/ingame.c

@@ -109,6 +109,12 @@ static float height_at(SceneIngame *scn, Vec2 position);
 static Vec3 normal_at(SceneIngame *scn, Vec2 position);
 
 
+static inline float clampf(float f, float min, float max) {
+    const float t = f < min ? min : f;
+    return t > max ? max : t;
+}
+
+
 static void draw_vehicle(SceneIngame *scn) {
     for (size_t i = 0; i < 12; ++i)
         draw_line_3d(vbp[vbs[i][0]], vbp[vbs[i][1]], 1, (Color){255, 255, 255, 255});