diff options
| author | Fabio Alessandrelli <fabio.alessandrelli@gmail.com> | 2015-03-19 14:10:07 +0000 |
|---|---|---|
| committer | Fabio Alessandrelli <fabio.alessandrelli@gmail.com> | 2015-05-18 01:30:43 +0000 |
| commit | 473c7222f512488bfea3674358e15cac83d41ffb (patch) | |
| tree | 50ba2fc0b960f3fdedcbe21c6723dc6c88c96182 /servers/physics | |
| parent | 5272853cdc1c37fc545c443370bf87642122f4cc (diff) | |
Calculate gravity based on distance from body to gravity point
Diffstat (limited to 'servers/physics')
| -rw-r--r-- | servers/physics/area_sw.cpp | 3 | ||||
| -rw-r--r-- | servers/physics/area_sw.h | 4 | ||||
| -rw-r--r-- | servers/physics/body_sw.cpp | 9 |
3 files changed, 13 insertions, 3 deletions
diff --git a/servers/physics/area_sw.cpp b/servers/physics/area_sw.cpp index de241c948b..aa1c530221 100644 --- a/servers/physics/area_sw.cpp +++ b/servers/physics/area_sw.cpp @@ -98,6 +98,7 @@ void AreaSW::set_param(PhysicsServer::AreaParameter p_param, const Variant& p_va case PhysicsServer::AREA_PARAM_GRAVITY: gravity=p_value; ; break; case PhysicsServer::AREA_PARAM_GRAVITY_VECTOR: gravity_vector=p_value; ; break; case PhysicsServer::AREA_PARAM_GRAVITY_IS_POINT: gravity_is_point=p_value; ; break; + case PhysicsServer::AREA_PARAM_GRAVITY_DISTANCE_SCALE: gravity_distance_scale=p_value; ; break; case PhysicsServer::AREA_PARAM_GRAVITY_POINT_ATTENUATION: point_attenuation=p_value; ; break; case PhysicsServer::AREA_PARAM_DENSITY: density=p_value; ; break; case PhysicsServer::AREA_PARAM_PRIORITY: priority=p_value; ; break; @@ -113,6 +114,7 @@ Variant AreaSW::get_param(PhysicsServer::AreaParameter p_param) const { case PhysicsServer::AREA_PARAM_GRAVITY: return gravity; case PhysicsServer::AREA_PARAM_GRAVITY_VECTOR: return gravity_vector; case PhysicsServer::AREA_PARAM_GRAVITY_IS_POINT: return gravity_is_point; + case PhysicsServer::AREA_PARAM_GRAVITY_DISTANCE_SCALE: return gravity_distance_scale; case PhysicsServer::AREA_PARAM_GRAVITY_POINT_ATTENUATION: return point_attenuation; case PhysicsServer::AREA_PARAM_DENSITY: return density; case PhysicsServer::AREA_PARAM_PRIORITY: return priority; @@ -177,6 +179,7 @@ AreaSW::AreaSW() : CollisionObjectSW(TYPE_AREA), monitor_query_list(this), move gravity=9.80665; gravity_vector=Vector3(0,-1,0); gravity_is_point=false; + gravity_distance_scale=0; point_attenuation=1; density=0.1; priority=0; diff --git a/servers/physics/area_sw.h b/servers/physics/area_sw.h index 87843b93c9..a875472f6b 100644 --- a/servers/physics/area_sw.h +++ b/servers/physics/area_sw.h @@ -45,6 +45,7 @@ class AreaSW : public CollisionObjectSW{ float gravity; Vector3 gravity_vector; bool gravity_is_point; + float gravity_distance_scale; float point_attenuation; float density; int priority; @@ -125,6 +126,9 @@ public: _FORCE_INLINE_ void set_gravity_as_point(bool p_enable) { gravity_is_point=p_enable; } _FORCE_INLINE_ bool is_gravity_point() const { return gravity_is_point; } + _FORCE_INLINE_ void set_gravity_distance_scale(float scale) { gravity_distance_scale=scale; } + _FORCE_INLINE_ float get_gravity_distance_scale() const { return gravity_distance_scale; } + _FORCE_INLINE_ void set_point_attenuation(float p_point_attenuation) { point_attenuation=p_point_attenuation; } _FORCE_INLINE_ float get_point_attenuation() const { return point_attenuation; } diff --git a/servers/physics/body_sw.cpp b/servers/physics/body_sw.cpp index 1cc0b763a4..5a528ecf94 100644 --- a/servers/physics/body_sw.cpp +++ b/servers/physics/body_sw.cpp @@ -362,9 +362,12 @@ void BodySW::set_space(SpaceSW *p_space){ void BodySW::_compute_area_gravity(const AreaSW *p_area) { if (p_area->is_gravity_point()) { - - gravity += (p_area->get_transform().xform(p_area->get_gravity_vector()) - get_transform().get_origin()).normalized() * p_area->get_gravity(); - + if(p_area->get_gravity_distance_scale() > 0) { + Vector3 v = p_area->get_transform().xform(p_area->get_gravity_vector()) - get_transform().get_origin(); + gravity += v.normalized() * (p_area->get_gravity() / Math::pow(v.length() * p_area->get_gravity_distance_scale()+1, 2) ); + } else { + gravity += (p_area->get_transform().xform(p_area->get_gravity_vector()) - get_transform().get_origin()).normalized() * p_area->get_gravity(); + } } else { gravity += p_area->get_gravity_vector() * p_area->get_gravity(); } |