Enum bevy_rapier2d::prelude::SpringModel [−][src]
pub enum SpringModel { Disabled, VelocityBased, AccelerationBased, ForceBased, }
Expand description
The spring-like model used for constraints resolution.
Variants
No equation is solved.
The solved spring-like equation is:
delta_velocity(t + dt) = stiffness / dt * (target_pos - pos(t)) + damping * (target_vel - vel(t))
Here the stiffness
is the ratio of position error to be solved at each timestep (like
a velocity-based ERP), and the damping
is the ratio of velocity error to be solved at
each timestep.
The solved spring-like equation is:
acceleration(t + dt) = stiffness * (target_pos - pos(t)) + damping * (target_vel - vel(t))
The solved spring-like equation is:
force(t + dt) = stiffness * (target_pos - pos(t + dt)) + damping * (target_vel - vel(t + dt))
Implementations
Combines the coefficients used for solving the spring equation.
Returns the new coefficients (stiffness, damping, inv_lhs_scale, keep_inv_lhs) coefficients for the equivalent impulse-based equation. These new coefficients must be used in the following way:
rhs = (stiffness * pos_err + damping * vel_err) / gamma
.new_inv_lhs = gamma * if keep_inv_lhs { inv_lhs } else { 1.0 }
. Note that the returnedgamma
will be zero if bothstiffness
anddamping
are zero.
Trait Implementations
Returns the “default value” for a type. Read more
Auto Trait Implementations
impl RefUnwindSafe for SpringModel
impl Send for SpringModel
impl Sync for SpringModel
impl Unpin for SpringModel
impl UnwindSafe for SpringModel
Blanket Implementations
Mutably borrows from an owned value. Read more
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T: Any,
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impl<T> FromWorld for T where
T: Default,
impl<T> FromWorld for T where
T: Default,
pub fn from_world(_world: &mut World) -> T
pub fn from_world(_world: &mut World) -> T
Creates Self
using data from the given [World]
Instruments this type with the provided Span
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type Output = T
type Output = T
Should always be Self
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pub fn is_in_subset(&self) -> bool
pub fn is_in_subset(&self) -> bool
Checks if self
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pub fn to_subset_unchecked(&self) -> SS
pub fn to_subset_unchecked(&self) -> SS
Use with care! Same as self.to_subset
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pub fn from_subset(element: &SS) -> SP
pub fn from_subset(element: &SS) -> SP
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pub fn vzip(self) -> V