returns the lane index of the current thread (thread index in warp)

simple variant of SHFL instruction returns val from the specified lane optional width parameter must be a power of two and width <= 32

Copy from a lane with higher ID relative to caller

Copy from a lane with lower ID relative to caller

Copy from a lane based on bitwise XOR of own lane ID

partion faces around the median face

partion faces based on the surface area heuristic

construct a plane equation such that ax + by + cz + dw = 0

Random number in range [-1,1]

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helper function to rotate an object

rotate vector by inverse transform in (q, w)

round towards +infinity

* Get the index of the most significant bit. Result is undefined when called * with 0. This operation can also be stated as "count leading zeroes"

* \brief Returns true if point resides inside a rectangle. */

* \brief Returns true if the rectangle has no area. */

* \brief Returns true if the two rectangles are equal. */

Note that memset() is a byte assignment and this is a 32-bit assignment, so they're not directly equivalent. */