From: Mathnerd314 <man.is.allan@gmail.com>
Date: Sun, 3 May 2009 22:04:19 +0000 (+0000)
Subject: Ice blocks (graphics are placeholders)
X-Git-Url: https://git.verplant.org/?a=commitdiff_plain;h=8c0b10ba9ff57a36c3747c84a035faca5975556d;p=supertux.git

Ice blocks (graphics are placeholders)

SVN-Revision: 5885
---

diff --git a/data/images/tiles.strf b/data/images/tiles.strf
index adae3eef2..f010a74fc 100644
--- a/data/images/tiles.strf
+++ b/data/images/tiles.strf
@@ -3410,5 +3410,12 @@
     (image "tiles/pipe/blue.png")
   )
 
-;; next-id: 2406
+  (tile
+    (id 2406)
+    (ice #t)
+    (solid #t)
+    (images
+      "objects/icecube/icecube.png"))
+
+;; next-id: 2407
 )
diff --git a/data/levels/test/icetest.stl b/data/levels/test/icetest.stl
new file mode 100644
index 000000000..f7124423c
--- /dev/null
+++ b/data/levels/test/icetest.stl
@@ -0,0 +1,51 @@
+(supertux-level
+  (version 2)
+  (name (_ "Ice test"))
+  (author "Mathnerd314")
+  (sector
+    (name "main")
+    (music "music/chipdisko.ogg")
+    (ambient-light 1 1 1)
+    (spawnpoint
+      (name "main")
+      (x 100)
+      (y 100)
+    )
+    (background
+      (speed 0.5)
+      (image "images/background/arctis.jpg")
+    )
+    (tilemap
+      (z-pos 0)
+      (solid #t)
+      (speed 1)
+      (width 27)
+      (height 19)
+      (tiles
+0  0  0  0  0  0  0  0  0  0  0  0   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  
+0  0  0  0  0  0  0  0  0  0  0  0   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  
+0  0  0  0  0  0  0  0  0  0  0  0   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  
+0  0  0  0  0  0  0  0  0  0  0  0   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  
+0  0  0  0  0  0  0  0  0  0  0  0   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  
+0  0  0  0  0  0  0  0  0  0  0  0   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  
+0  0  0  0  0  0  0  0  0  0  0  0   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  
+0  0  0  0  0  0  0  0  0  0  0  0   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  
+0  0  0  0  0  0  0  0  0  0  0  0   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  
+0  0  0  0  0  0  0  0  0  0  0  0   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  
+0  0  0  0  0  0  0  0  0  0  0  0   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  
+0  0  0  0  0  0  0  0  0  0  0  0   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  
+0  0  0  0  0  0  0  0  0  0  0  0   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  
+0  0  0  0  0  0  0  0  0  0  0  0   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  
+0  0  0  0  0  0  0  0  0  0  0  0   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  
+0  0  0  0  0  0  0  0  0  0  0  0   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  
+7  8  8  8  8  8  8  9  0  2406 2406 2406 2406 2406 2406 2406 2406 2406 2406 2406 2406 2406 2406 2406 2406 2406 2406 
+13 14 14 14 14 14 14 15 0  0  0  0   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  
+10 11 11 11 11 11 11 12 0  0  0  0   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  
+      )
+    )
+
+    (camera
+      (mode "normal")
+    )
+  )
+)
diff --git a/src/object/player.cpp b/src/object/player.cpp
index 033f569b2..f04cb9090 100644
--- a/src/object/player.cpp
+++ b/src/object/player.cpp
@@ -94,6 +94,12 @@ namespace {
   /** instant velocity when tux starts to walk */
   static const float WALK_SPEED = 100;
 
+  /** multiplied by WALK_ACCELERATION to give friction */
+  static const float NORMAL_FRICTION_MULTIPLIER = 1.5f;
+  /** multiplied by WALK_ACCELERATION to give friction */
+  static const float ICE_FRICTION_MULTIPLIER = 0.1f;
+  static const float ICE_ACCELERATION_MULTIPLIER = 0.25f;
+
   /** time of the kick (kicking mriceblock) animation */
   static const float KICK_TIME = .3f;
   /** time of tux cheering (currently unused) */
@@ -171,6 +177,8 @@ Player::init()
   backflip_direction = 0;
   visible = true;
   swimming = false;
+  on_ice = false;
+  ice_this_frame = false;
   speedlimit = 0; //no special limit
 
   on_ground_flag = false;
@@ -350,7 +358,11 @@ Player::update(float elapsed_time)
     grabbed_object = NULL;
   }
 
+  if(!ice_this_frame && on_ground())
+    on_ice = false;
+
   on_ground_flag = false;
+  ice_this_frame = false;
 
   // when invincible, spawn particles
   if (invincible_timer.started() && !dying)
@@ -402,10 +414,14 @@ Player::apply_friction()
   if ((on_ground()) && (fabs(physic.get_velocity_x()) < WALK_SPEED)) {
     physic.set_velocity_x(0);
     physic.set_acceleration_x(0);
-  } else if(physic.get_velocity_x() < 0) {
-    physic.set_acceleration_x(WALK_ACCELERATION_X * 1.5);
-    } else if(physic.get_velocity_x() > 0) {
-    physic.set_acceleration_x(WALK_ACCELERATION_X * -1.5);
+  } else {
+    float friction = on_ice ? (WALK_ACCELERATION_X * ICE_FRICTION_MULTIPLIER) :
+                    (WALK_ACCELERATION_X * NORMAL_FRICTION_MULTIPLIER);
+    if(physic.get_velocity_x() < 0) {
+      physic.set_acceleration_x(friction);
+    } else /*if(physic.get_velocity_x() > 0)*/ {
+      physic.set_acceleration_x(-friction);
+    }
   }
 }
 
@@ -490,6 +506,10 @@ Player::handle_horizontal_input()
     }
   }
 
+  if(on_ice) {
+    ax *= ICE_ACCELERATION_MULTIPLIER;
+  }
+
   physic.set_velocity(vx, vy);
   physic.set_acceleration(ax, ay);
 
@@ -1071,6 +1091,11 @@ Player::collision_tile(uint32_t tile_attributes)
     }
   }
 #endif
+
+  if(tile_attributes & (Tile::ICE | Tile::SOLID)) {
+    ice_this_frame = true;
+    on_ice = true;
+  }
 }
 
 void
diff --git a/src/object/player.hpp b/src/object/player.hpp
index 91a1fcfc5..07e62d17e 100644
--- a/src/object/player.hpp
+++ b/src/object/player.hpp
@@ -75,6 +75,8 @@ private:
   float speedlimit;
   Controller* scripting_controller_old; /**< Saves the old controller while the scripting_controller is used */
   bool jump_early_apex;
+  bool on_ice;
+  bool ice_this_frame;
 
 public:
   Direction dir;