Differential D13361 Diff 45286 intern/cycles/kernel/sample/lcg.h

Changeset View

Standalone View

	Show All 13 Lines
	* limitations under the License.			* limitations under the License.
	*/			*/
	#pragma once			#pragma once

	CCL_NAMESPACE_BEGIN			CCL_NAMESPACE_BEGIN

	/* Linear Congruential Generator */			/* Linear Congruential Generator */

	ccl_device uint lcg_step_uint(uint *rng)			/* This is templated to handle multiple address spaces on Metal. */
				template<class T> ccl_device uint lcg_step_uint(T rng)
	{			{
	/* implicit mod 2^32 */			/* implicit mod 2^32 */
	rng = (1103515245 (*rng) + 12345);			rng = (1103515245 (*rng) + 12345);
	return *rng;			return *rng;
	}			}

	ccl_device float lcg_step_float(uint *rng)			/* This is templated to handle multiple address spaces on Metal. */
				template<class T> ccl_device float lcg_step_float(T rng)
	{			{
	/* implicit mod 2^32 */			/* implicit mod 2^32 */
	rng = (1103515245 (*rng) + 12345);			rng = (1103515245 (*rng) + 12345);
	return (float)rng (1.0f / (float)0xFFFFFFFF);			return (float)rng (1.0f / (float)0xFFFFFFFF);
	}			}

	ccl_device uint lcg_init(uint seed)			ccl_device uint lcg_init(uint seed)
	{			{
	Show All 14 Lines