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Unity Engine

UpdateInstanceTransform

Updates the transformation of a ray tracing instance.
Read time 1 minuteLast updated 10 days ago

Definition

UpdateInstanceTransform(Renderer)

Updates the transformation of a ray tracing instance.
public void UpdateInstanceTransform(Renderer renderer)

Parameters

renderer

Renderer
The Renderer associated with a ray tracing instance.

Remarks

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

UpdateInstanceTransform(int, Matrix4x4)

Updates the transformation of a ray tracing instance.
public void UpdateInstanceTransform(int handle, Matrix4x4 matrix)

Parameters

handle

int
The handle associated with a AABB or Mesh ray tracing instance.

matrix

Matrix4x4
The new transformation matrix of the ray tracing instance.

Remarks

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.