diff options
Diffstat (limited to 'src/environment.cpp')
| -rw-r--r-- | src/environment.cpp | 45 |
1 files changed, 31 insertions, 14 deletions
diff --git a/src/environment.cpp b/src/environment.cpp index 51255b918..e939672e7 100644 --- a/src/environment.cpp +++ b/src/environment.cpp @@ -1,6 +1,6 @@ /* -Minetest-c55 -Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com> +Minetest +Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com> This program is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by @@ -2065,20 +2065,37 @@ void ClientEnvironment::step(float dtime) { // Gravity v3f speed = lplayer->getSpeed(); - if(lplayer->swimming_up == false) - speed.Y -= 9.81 * BS * dtime_part * 2; + if(lplayer->in_liquid == false) + speed.Y -= lplayer->movement_gravity * dtime_part * 2; - // Water resistance - if(lplayer->in_water_stable || lplayer->in_water) - { - f32 max_down = 2.0*BS; - if(speed.Y < -max_down) speed.Y = -max_down; + // Liquid floating / sinking + if(lplayer->in_liquid && !lplayer->swimming_vertical) + speed.Y -= lplayer->movement_liquid_sink * dtime_part * 2; - f32 max = 2.5*BS; - if(speed.getLength() > max) - { - speed = speed / speed.getLength() * max; - } + // Liquid resistance + if(lplayer->in_liquid_stable || lplayer->in_liquid) + { + // How much the node's viscosity blocks movement, ranges between 0 and 1 + // Should match the scale at which viscosity increase affects other liquid attributes + const f32 viscosity_factor = 0.3; + + v3f d_wanted = -speed / lplayer->movement_liquid_fluidity; + f32 dl = d_wanted.getLength(); + if(dl > lplayer->movement_liquid_fluidity_smooth) + dl = lplayer->movement_liquid_fluidity_smooth; + dl *= (lplayer->liquid_viscosity * viscosity_factor) + (1 - viscosity_factor); + + v3f d = d_wanted.normalize() * dl; + speed += d; + +#if 0 // old code + if(speed.X > lplayer->movement_liquid_fluidity + lplayer->movement_liquid_fluidity_smooth) speed.X -= lplayer->movement_liquid_fluidity_smooth; + if(speed.X < -lplayer->movement_liquid_fluidity - lplayer->movement_liquid_fluidity_smooth) speed.X += lplayer->movement_liquid_fluidity_smooth; + if(speed.Y > lplayer->movement_liquid_fluidity + lplayer->movement_liquid_fluidity_smooth) speed.Y -= lplayer->movement_liquid_fluidity_smooth; + if(speed.Y < -lplayer->movement_liquid_fluidity - lplayer->movement_liquid_fluidity_smooth) speed.Y += lplayer->movement_liquid_fluidity_smooth; + if(speed.Z > lplayer->movement_liquid_fluidity + lplayer->movement_liquid_fluidity_smooth) speed.Z -= lplayer->movement_liquid_fluidity_smooth; + if(speed.Z < -lplayer->movement_liquid_fluidity - lplayer->movement_liquid_fluidity_smooth) speed.Z += lplayer->movement_liquid_fluidity_smooth; +#endif } lplayer->setSpeed(speed); |