From f418812c321e94376bf738aad4b0ff77b2d45517 Mon Sep 17 00:00:00 2001
From: Christoph Sommer <mail@christoph-sommer.de>
Date: Mon, 27 Mar 2006 23:12:28 +0000
Subject: [PATCH] Titlescreen features a jumping Tux again

SVN-Revision: 3123
---
 data/levels/misc/menu.stl |  8 --------
 src/title.cpp             | 45 ++++++++++++++++++++++++++++-----------------
 2 files changed, 28 insertions(+), 25 deletions(-)

diff --git a/data/levels/misc/menu.stl b/data/levels/misc/menu.stl
index 8b00d12db..93fff4df0 100644
--- a/data/levels/misc/menu.stl
+++ b/data/levels/misc/menu.stl
@@ -337,15 +337,7 @@
       (mode "normal")
     )
 
-       (background
-         (image "arctis.jpg")
-         (speed 0.500000)
-       )
        (spawnpoint (name "main") (x 0) (y 0))
-       (background
-         (image "arctis.jpg")
-         (speed 0.500000)
-       )
    )
  )
 
diff --git a/src/title.cpp b/src/title.cpp
index c23186478..8a77d3a91 100644
--- a/src/title.cpp
+++ b/src/title.cpp
@@ -66,9 +66,6 @@ static Surface* bkg_title;
 static Surface* logo;
 //static Surface* img_choose_subset;
 
-static bool walking;
-static Timer random_timer;
-
 static int frame;
 
 static GameSession* titlesession;
@@ -243,8 +240,12 @@ void check_contrib_subset_menu()
 
 void draw_demo(float elapsed_time)
 {
+  static Timer randomWaitTimer;
+  static Timer jumpPushTimer;
+  static Timer jumpRecoverTimer;
   static float last_tux_x_pos = -1;
   static float last_tux_y_pos = -1;
+
   Sector* sector  = titlesession->get_current_sector();
   Player* tux = sector->player;
 
@@ -252,18 +253,31 @@ void draw_demo(float elapsed_time)
 
   controller->update();
   controller->press(Controller::RIGHT);
+
+  // Determine how far we moved since last frame
+  float dx = fabsf(last_tux_x_pos - tux->get_pos().x); 
+  float dy = fabsf(last_tux_y_pos - tux->get_pos().y); 
+ 
+  // Calculate space to check for obstacles 
+  Rect lookahead = Rect(tux->get_bbox());
+  lookahead.move(Vector(lookahead.get_width()*2,0));
   
-  if(random_timer.check() || 
-      (walking && fabsf(last_tux_x_pos - tux->get_pos().x)) < .1) {
-    walking = false;
-  } else {
-      if(!walking && fabsf(tux->get_pos().y - last_tux_y_pos) < .1) {
-        random_timer.start(float(rand() % 3000 + 3000) / 1000.);
-        walking = true;
-      }
+  // Check if we should press the jump button
+  bool randomJump = !randomWaitTimer.started();
+  bool mayJump = !jumpRecoverTimer.started();
+  bool notMoving = (dx+dy < 0.1);
+  bool pathBlocked = !sector->is_free_space(lookahead); 
+  if ((notMoving || pathBlocked || randomJump) && mayJump) {
+    float jumpDuration = float(rand() % 200 + 500) / 1000.0;
+    jumpPushTimer.start(jumpDuration);
+    jumpRecoverTimer.start(jumpDuration+0.1);
+    randomWaitTimer.start(float(rand() % 3000 + 3000) / 1000.0);
   }
-  if(!walking)
-    controller->press(Controller::JUMP);
+
+  // Keep jump button pressed
+  if (jumpPushTimer.started()) controller->press(Controller::JUMP);
+
+  // Remember last position, so we can determine if we moved
   last_tux_x_pos = tux->get_pos().x;
   last_tux_y_pos = tux->get_pos().y;
 
@@ -280,7 +294,6 @@ void draw_demo(float elapsed_time)
 /* --- TITLE SCREEN --- */
 void title()
 {
-  walking = true;
   //LevelEditor* leveleditor;
   controller = new CodeController();
 
@@ -300,8 +313,6 @@ void title()
   /* --- Main title loop: --- */
   frame = 0;
 
-  random_timer.start(float(rand() % 2000 + 2000) / 1000.0);
-
   Uint32 lastticks = SDL_GetTicks();
   
   Menu::set_current(main_menu);
@@ -340,7 +351,7 @@ void title()
         context.draw_surface(logo, Vector(SCREEN_WIDTH/2 - logo->get_width()/2, 30),
             LAYER_FOREGROUND1+1);
 
-      context.draw_text(white_small_text, " SuperTux " PACKAGE_VERSION "\n",
+      context.draw_text(white_small_text, " SuperTux " PACKAGE_VERSION " - This is an unsupported, experimental branch made by Christoph Sommer\n",
               Vector(0, SCREEN_HEIGHT - 50), LEFT_ALLIGN, LAYER_FOREGROUND1);
       context.draw_text(white_small_text,
         _(
-- 
2.11.0