SPIR-V Built-In
RayTminKHR
Minimum T value of a ray
RayTminKHR
A variable decorated with the RayTminKHR decoration will contain the
parametric tmin value of the ray being processed.
The value is independent of the space in which the ray origin and direction
exist.
The value is the parameter passed into the pipeline trace ray instruction.
The tmin value remains constant for the duration of the ray query.
Valid Usage
VUID-RayTminKHR-RayTminKHR-04351
The RayTminKHR decoration must be used only within the
IntersectionKHR, AnyHitKHR, ClosestHitKHR, or
MissKHR Execution Model
VUID-RayTminKHR-RayTminKHR-04352
The variable decorated with RayTminKHR must be declared using the
Input Storage Class
VUID-RayTminKHR-RayTminKHR-04353
The variable decorated with RayTminKHR must be declared as a
scalar 32-bit floating-point value