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JoltPhysics3D: Skip the rigid body update if no physics step took place 

This improves the framerate if FPS > physics rate
This commit is contained in:
SirLynix 2023-11-26 21:28:40 +01:00
parent 72182327dd
commit f09175228d
3 changed files with 12 additions and 7 deletions
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6
include/Nazara/JoltPhysics3D/JoltPhysWorld3D.hpp
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@ -59,15 +59,15 @@ namespace Nz
void RefreshBodies(); void RefreshBodies();
inline void RegisterStepListener(JoltPhysicsStepListener* character); inline void RegisterStepListener(JoltPhysicsStepListener* stepListener);
void SetGravity(const Vector3f& gravity); void SetGravity(const Vector3f& gravity);
void SetMaxStepCount(std::size_t maxStepCount); void SetMaxStepCount(std::size_t maxStepCount);
void SetStepSize(Time stepSize); void SetStepSize(Time stepSize);
void Step(Time timestep); bool Step(Time timestep);
inline void UnregisterStepListener(JoltPhysicsStepListener* character); inline void UnregisterStepListener(JoltPhysicsStepListener* stepListener);
JoltPhysWorld3D& operator=(const JoltPhysWorld3D&) = delete; JoltPhysWorld3D& operator=(const JoltPhysWorld3D&) = delete;
JoltPhysWorld3D& operator=(JoltPhysWorld3D&&) = delete; JoltPhysWorld3D& operator=(JoltPhysWorld3D&&) = delete;

10
src/Nazara/JoltPhysics3D/JoltPhysWorld3D.cpp
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@ -456,15 +456,17 @@ namespace Nz
m_stepSize = stepSize; m_stepSize = stepSize;
} }
void JoltPhysWorld3D::Step(Time timestep) bool JoltPhysWorld3D::Step(Time timestep)
{ {
m_timestepAccumulator += timestep;
if (m_timestepAccumulator < m_stepSize)
return false;
RefreshBodies(); RefreshBodies();
JPH::JobSystem& jobSystem = JoltPhysics3D::Instance()->GetThreadPool(); JPH::JobSystem& jobSystem = JoltPhysics3D::Instance()->GetThreadPool();
float stepSize = m_stepSize.AsSeconds<float>(); float stepSize = m_stepSize.AsSeconds<float>();
m_timestepAccumulator += timestep;
std::size_t stepCount = 0; std::size_t stepCount = 0;
while (m_timestepAccumulator >= m_stepSize && stepCount < m_maxStepCount) while (m_timestepAccumulator >= m_stepSize && stepCount < m_maxStepCount)
{ {
@ -476,6 +478,8 @@ namespace Nz
m_timestepAccumulator -= m_stepSize; m_timestepAccumulator -= m_stepSize;
stepCount++; stepCount++;
} }
return true;
} }
void JoltPhysWorld3D::RegisterBody(const JPH::BodyID& bodyID, bool activate, bool removeFromDeactivationList) void JoltPhysWorld3D::RegisterBody(const JPH::BodyID& bodyID, bool activate, bool removeFromDeactivationList)

3
src/Nazara/JoltPhysics3D/Systems/JoltPhysics3DSystem.cpp
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@ -90,7 +90,8 @@ namespace Nz
}); });
// Update the physics world // Update the physics world
m_physWorld.Step(elapsedTime); if (!m_physWorld.Step(elapsedTime))
return; // No physics step took place
// Replicate characters to their NodeComponent // Replicate characters to their NodeComponent
{ {