forked from LeenkxTeam/LNXSDK
20 lines
1.2 KiB
C
20 lines
1.2 KiB
C
// Jolt Physics Library (https://github.com/jrouwe/JoltPhysics)
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// SPDX-FileCopyrightText: 2026 Jorrit Rouwe
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// SPDX-License-Identifier: MIT
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void ApplyGlobalPose(JPH_IN_OUT(JPH_HairPosition) ioPos, float3 inRestPosition, JPH_Quat inRestOrientation, JPH_IN(JPH_HairGlobalPoseTransform) inGlobalPoseTransform, JPH_IN(JPH_HairMaterial) inMaterial, float inStrandFraction)
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{
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// LERP between stored global pose and global pose skinned to the scalp
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float skin_factor = GradientSamplerSample(inMaterial.mSkinGlobalPose, inStrandFraction);
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float3 in_position = inRestPosition;
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in_position += skin_factor * (inGlobalPoseTransform.mPosition + JPH_QuatMulVec3(inGlobalPoseTransform.mRotation, in_position) - in_position);
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JPH_Quat in_rotation = inRestOrientation;
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in_rotation += skin_factor * (JPH_QuatMulQuat(inGlobalPoseTransform.mRotation, in_rotation) - in_rotation);
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// LERP between simulated position and skinned position
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float pose_factor = GradientSamplerSample(inMaterial.mGlobalPose, inStrandFraction);
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ioPos.mPosition += pose_factor * (in_position - ioPos.mPosition);
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ioPos.mRotation += pose_factor * (in_rotation - ioPos.mRotation);
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ioPos.mRotation = normalize(ioPos.mRotation);
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}
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