Modernize client code (#6250)

[oweals/minetest.git] / src / localplayer.cpp

diff --git a/src/localplayer.cpp b/src/localplayer.cpp
index f04be07d69ce9a533ca2e72bf4d0383c7784cf44..62066bb1856a89ba679bdf6880d4f66008e2dc58 100644 (file)
--- a/src/localplayer.cpp
+++ b/src/localplayer.cpp
@@ -444,7 +444,7 @@ void LocalPlayer::move(f32 dtime, Environment *env, f32 pos_max_d)
        move(dtime, env, pos_max_d, NULL);
 }
 
-void LocalPlayer::applyControl(float dtime)
+void LocalPlayer::applyControl(float dtime, Environment *env)
 {
        // Clear stuff
        swimming_vertical = false;
@@ -660,9 +660,15 @@ void LocalPlayer::applyControl(float dtime)
        else
                incH = incV = movement_acceleration_default * BS * dtime;
 
+       const INodeDefManager *nodemgr = env->getGameDef()->ndef();
+       Map *map = &env->getMap();
+       const ContentFeatures &f = nodemgr->get(map->getNodeNoEx(getStandingNodePos()));
+       bool slippery = (itemgroup_get(f.groups, "slippery") != 0);
        // Accelerate to target speed with maximum increment
-       accelerateHorizontal(speedH * physics_override_speed, incH * physics_override_speed);
-       accelerateVertical(speedV * physics_override_speed, incV * physics_override_speed);
+       accelerateHorizontal(speedH * physics_override_speed,
+                       incH * physics_override_speed, slippery);
+       accelerateVertical(speedV * physics_override_speed,
+                       incV * physics_override_speed);
 }
 
 v3s16 LocalPlayer::getStandingNodePos()
@@ -699,36 +705,44 @@ v3f LocalPlayer::getEyeOffset() const
 }
 
 // Horizontal acceleration (X and Z), Y direction is ignored
-void LocalPlayer::accelerateHorizontal(const v3f &target_speed, const f32 max_increase)
+void LocalPlayer::accelerateHorizontal(const v3f &target_speed,
+       const f32 max_increase, bool slippery)
 {
         if (max_increase == 0)
                 return;
 
-        v3f d_wanted = target_speed - m_speed;
-        d_wanted.Y = 0;
-        f32 dl = d_wanted.getLength();
-        if (dl > max_increase)
-                dl = max_increase;
+       v3f d_wanted = target_speed - m_speed;
+       if (slippery) {
+               if (target_speed == v3f())
+                       d_wanted = -m_speed * 0.05f;
+               else
+                       d_wanted *= 0.1f;
+       }
+
+       d_wanted.Y = 0.0f;
+       f32 dl = d_wanted.getLength();
+       if (dl > max_increase)
+               dl = max_increase;
 
-        v3f d = d_wanted.normalize() * dl;
+       v3f d = d_wanted.normalize() * dl;
 
-        m_speed.X += d.X;
-        m_speed.Z += d.Z;
+       m_speed.X += d.X;
+       m_speed.Z += d.Z;
 }
 
 // Vertical acceleration (Y), X and Z directions are ignored
 void LocalPlayer::accelerateVertical(const v3f &target_speed, const f32 max_increase)
 {
-        if (max_increase == 0)
-                return;
+       if (max_increase == 0)
+               return;
 
-        f32 d_wanted = target_speed.Y - m_speed.Y;
-        if (d_wanted > max_increase)
-                d_wanted = max_increase;
-        else if (d_wanted < -max_increase)
-                d_wanted = -max_increase;
+       f32 d_wanted = target_speed.Y - m_speed.Y;
+       if (d_wanted > max_increase)
+               d_wanted = max_increase;
+       else if (d_wanted < -max_increase)
+               d_wanted = -max_increase;
 
-        m_speed.Y += d_wanted;
+       m_speed.Y += d_wanted;
 }
 
 // Temporary option for old move code