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Calculate gravity based on distance from body to gravity point

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This commit is contained in:
Fabio Alessandrelli 2015-03-19 14:10:07 +00:00
parent 5272853cdc
commit 473c7222f5
7 changed files with 35 additions and 4 deletions
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17
scene/3d/area.cpp
View file

@ -42,7 +42,6 @@ Area::SpaceOverride Area::get_space_override_mode() const{
}
void Area::set_gravity_is_point(bool p_enabled){
gravity_is_point=p_enabled;
PhysicsServer::get_singleton()->area_set_param(get_rid(),PhysicsServer::AREA_PARAM_GRAVITY_IS_POINT,p_enabled);
@ -52,6 +51,17 @@ bool Area::is_gravity_a_point() const{
return gravity_is_point;
}
void Area::set_gravity_distance_scale(real_t p_scale){
gravity_distance_scale=p_scale;
PhysicsServer::get_singleton()->area_set_param(get_rid(),PhysicsServer::AREA_PARAM_GRAVITY_DISTANCE_SCALE,p_scale);
}
real_t Area::get_gravity_distance_scale() const{
return gravity_distance_scale;
}
void Area::set_gravity_vector(const Vector3& p_vec){
gravity_vec=p_vec;
@ -302,6 +312,9 @@ void Area::_bind_methods() {
ObjectTypeDB::bind_method(_MD("set_gravity_is_point","enable"),&Area::set_gravity_is_point);
ObjectTypeDB::bind_method(_MD("is_gravity_a_point"),&Area::is_gravity_a_point);
ObjectTypeDB::bind_method(_MD("set_gravity_distance_scale","distance_scale"),&Area::set_gravity_distance_scale);
ObjectTypeDB::bind_method(_MD("get_gravity_distance_scale"),&Area::get_gravity_distance_scale);
ObjectTypeDB::bind_method(_MD("set_gravity_vector","vector"),&Area::set_gravity_vector);
ObjectTypeDB::bind_method(_MD("get_gravity_vector"),&Area::get_gravity_vector);
@ -330,6 +343,7 @@ void Area::_bind_methods() {
ADD_PROPERTY( PropertyInfo(Variant::INT,"space_override",PROPERTY_HINT_ENUM,"Disabled,Combine,Replace"),_SCS("set_space_override_mode"),_SCS("get_space_override_mode"));
ADD_PROPERTY( PropertyInfo(Variant::BOOL,"gravity_point"),_SCS("set_gravity_is_point"),_SCS("is_gravity_a_point"));
ADD_PROPERTY( PropertyInfo(Variant::REAL,"gravity_distance_scale", PROPERTY_HINT_RANGE,"0,1024,0.001"),_SCS("set_gravity_distance_scale"),_SCS("get_gravity_distance_scale"));
ADD_PROPERTY( PropertyInfo(Variant::VECTOR3,"gravity_vec"),_SCS("set_gravity_vector"),_SCS("get_gravity_vector"));
ADD_PROPERTY( PropertyInfo(Variant::REAL,"gravity",PROPERTY_HINT_RANGE,"-1024,1024,0.01"),_SCS("set_gravity"),_SCS("get_gravity"));
ADD_PROPERTY( PropertyInfo(Variant::REAL,"density",PROPERTY_HINT_RANGE,"0,1024,0.001"),_SCS("set_density"),_SCS("get_density"));
@ -345,6 +359,7 @@ Area::Area() : CollisionObject(PhysicsServer::get_singleton()->area_create(),tru
locked=false;
set_gravity_vector(Vector3(0,-1,0));
gravity_is_point=false;
gravity_distance_scale=0;
density=0.1;
priority=0;
monitoring=false;

4
scene/3d/area.h
View file

@ -49,6 +49,7 @@ private:
Vector3 gravity_vec;
real_t gravity;
bool gravity_is_point;
real_t gravity_distance_scale;
real_t density;
int priority;
bool monitoring;
@ -98,6 +99,9 @@ public:
void set_gravity_is_point(bool p_enabled);
bool is_gravity_a_point() const;
void set_gravity_distance_scale(real_t p_scale);
real_t get_gravity_distance_scale() const;
void set_gravity_vector(const Vector3& p_vec);
Vector3 get_gravity_vector() const;

3
servers/physics/area_sw.cpp
View file

@ -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;

4
servers/physics/area_sw.h
View file

@ -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; }

9
servers/physics/body_sw.cpp
View file

@ -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();
}

1
servers/physics_server.cpp
View file

@ -681,6 +681,7 @@ void PhysicsServer::_bind_methods() {
BIND_CONSTANT( AREA_PARAM_GRAVITY );
BIND_CONSTANT( AREA_PARAM_GRAVITY_VECTOR );
BIND_CONSTANT( AREA_PARAM_GRAVITY_IS_POINT );
BIND_CONSTANT( AREA_PARAM_GRAVITY_DISTANCE_SCALE );
BIND_CONSTANT( AREA_PARAM_GRAVITY_POINT_ATTENUATION );
BIND_CONSTANT( AREA_PARAM_DENSITY );
BIND_CONSTANT( AREA_PARAM_PRIORITY );

1
servers/physics_server.h
View file

@ -298,6 +298,7 @@ public:
AREA_PARAM_GRAVITY,
AREA_PARAM_GRAVITY_VECTOR,
AREA_PARAM_GRAVITY_IS_POINT,
AREA_PARAM_GRAVITY_DISTANCE_SCALE,
AREA_PARAM_GRAVITY_POINT_ATTENUATION,
AREA_PARAM_DENSITY,
AREA_PARAM_PRIORITY