CalculateSolverSteps.h

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// Jolt Physics Library (https://github.com/jrouwe/JoltPhysics)
// SPDX-FileCopyrightText: 2023 Jorrit Rouwe
// SPDX-License-Identifier: MIT
 
#pragma once
 
#include <Jolt/Physics/PhysicsSettings.h>
 
JPH_NAMESPACE_BEGIN
 
class CalculateSolverSteps
{
public:
    JPH_INLINE explicit         CalculateSolverSteps(const PhysicsSettings &inSettings) : mSettings(inSettings) { }
 
    template <class Type>
    JPH_INLINE void             operator () (const Type *inObject)
    {
        uint num_velocity_steps = inObject->GetNumVelocityStepsOverride();
        mNumVelocitySteps = max(mNumVelocitySteps, num_velocity_steps);
        mApplyDefaultVelocity |= num_velocity_steps == 0;
 
        uint num_position_steps = inObject->GetNumPositionStepsOverride();
        mNumPositionSteps = max(mNumPositionSteps, num_position_steps);
        mApplyDefaultPosition |= num_position_steps == 0;
    }
 
    JPH_INLINE void             Finalize()
    {
        // If we have a default velocity/position step count, take the max of the default and the overrides
        if (mApplyDefaultVelocity)
            mNumVelocitySteps = max(mNumVelocitySteps, mSettings.mNumVelocitySteps);
        if (mApplyDefaultPosition)
            mNumPositionSteps = max(mNumPositionSteps, mSettings.mNumPositionSteps);
    }
 
    JPH_INLINE uint             GetNumPositionSteps() const                 { return mNumPositionSteps; }
    JPH_INLINE uint             GetNumVelocitySteps() const                 { return mNumVelocitySteps; }
 
private:
    const PhysicsSettings &     mSettings;
 
    uint                        mNumVelocitySteps = 0;
    uint                        mNumPositionSteps = 0;
 
    bool                        mApplyDefaultVelocity = false;
    bool                        mApplyDefaultPosition = false;
};
 
class DummyCalculateSolverSteps
{
public:
    template <class Type>
    JPH_INLINE void             operator () (const Type *) const
    {
        /* Nothing to do */
    }
};
 
JPH_NAMESPACE_END