Jolt Physics 5.6 Launched – GameFromScratch.com

Only one week after Box3D physics was launched, the favored free & open supply cross platform Jolt physics engine launched Jolt Physics 5.6. This highly effective physics engine is already being utilized by tons of open supply sport engines, together with Godot and GDevelop in addition to getting used for industrial AAA titles comparable to Horizon Forbidden West, Loss of life Stranding 2 and X4. The 5.6 launch provides a number of new options, with the star of the present being the brand new hair simulation system.

Jolt Physics 5.6 options:

• Added interface to run compute shaders on the GPU with implementations for DX12, Vulkan and Metallic. These interfaces could be disabled by setting JPH_USE_DX12, JPH_USE_VK, JPH_USE_MTL and JPH_USE_CPU_COMPUTE to OFF. To construct on macOS, you’ll must have dxc and spirv-cross put in. The simplest technique to set up them is by putting in the Vulkan SDK.
• Added a strand based mostly hair simulation operating on GPU
  • System relies on Cosserad rods.
  • Can use lengthy vary attachment constraints to restrict the stretch of hairs.
  • Helps simulation (information) and render (comply with) hairs.
  • Hair vs hair collision is dealt with by accumulating the common velocity in a grid and utilizing these velocities to drive hairs.
  • Helps collision with the setting, though it solely helps ConvexHull and CompoundShapes in the mean time.
  • The roots of the hairs could be skinned to the scalp mesh.
  • Notice that that is nonetheless work in progress, some issues that also should be executed are listed in Hair.h.
• Carried out a brand new friction mannequin. This friction mannequin is cheaper to execute (15 % quicker, 40% much less reminiscence for Pyramid check) and doesn’t favor the primary contact manifold level. As a substitute of making use of friction at each contact level, we now calculate the common contact level and apply friction there. Friction consists of two linear constraints and 1 angular constraint. The linear constraints use the friction_coefficient * sum(contact_impulse) to find out the max linear friction impulse, the angular constraint makes use of friction_coefficient * sum(distance_friction_point_to_contact_point * contact_impulse) to find out the max angular friction impulse.
• Elevated most worth of HeightFieldShape::mBitsPerSample to 16 to have the ability to create top fields that extra intently match the uncompressed top values.
• Made tolerance that’s used within the inside edge elimination algorithm configurable in CollideShapeSettings::mInternalEdgeRemovalVertexToleranceSq and PhysicsSettings::mInternalEdgeRemovalVertexToleranceSq.
• Added assist for RISC-V RVV, the SIMD extension for RISC-V.
• Added JPH_BUILD_SHARED_LIBS cmake variable to find out whether or not to construct static or shared libraries (it defaults to BUILD_SHARED_LIBS). This enables embedding Jolt as a static library inside a shared library.
• Simulation stats: Added monitoring of collision steps. This fashion we are able to know by what number of steps we have to divide the numbers to get averages per step.
• Added assist for glTF KHR_physics_rigid_bodies constraint motors. This provides ESpringMode::MassNormalizedStiffnessAndDamping to have the ability to specify the spring parameters mass-normalized / in acceleration-mode. It additionally provides EMotorState::PositionAndVelocity which creates a power proportional to stiffness * (position_target - position_current) + damping * (velocity_target - velocity_current).
• Added Ragdoll::DriveToPoseUsingMotors variant that drives to a pose utilizing each place and velocity.
• Added Physique::ApplyBodyCreationSettings and Physique::ApplySoftBodyCreationSettings to have the ability to replace a physique with creation settings after creation.
• Added ShapeCastSettings::mExtraConvexRadius which inflates the question form by an additional convex radius.
• As much as 40% efficiency enchancment (scene dependent) and as much as 70% reminiscence discount (scene dependent).

Key Hyperlinks

Jolt Physics GitHub Repository

Jolt Physics 5.6 Launch Notes

You possibly can be taught extra about Jolt Physics 5.6 and see the brand new hair simulation in motion within the video under.