Version: Unity 6 (6000.0)
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  • C#

RayTracingAccelerationStructure.UpdateInstanceTransform

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Declaration

public void UpdateInstanceTransform(Renderer renderer);

Parameters

renderer The Renderer associated with a ray tracing instance.

Description

Updates the transformation of a ray tracing instance.

For a ray tracing instance associated with a Renderer component, Unity retrieves the transformation from the Transform component.


Declaration

public void UpdateInstanceTransform(int handle, Matrix4x4 matrix);

Parameters

handle The handle associated with a AABB or Mesh ray tracing instance.
matrix The new transformation matrix of the ray tracing instance.

Description

Updates the transformation of a ray tracing instance.

Pass along a new transformation matrix and the handle RayTracingAccelerationStructure.AddInstance returns in order to transform a ray tracing instance associated with a axis-aligned bounding box (AABB) GraphicsBuffer or a Mesh.

Access the transformation matrix in shader code using WorldToObject() or ObjectToWorld() HLSL functions.

To trigger an acceleration structure build on the GPU, call RayTracingAccelerationStructure.Build or CommandBuffer.BuildRayTracingAccelerationStructure.

Additional resources: RayTracingAccelerationStructure.AddInstance, RayTracingAccelerationStructure.RemoveInstance.