diff options
Diffstat (limited to 'intern/cycles/kernel/kernel_random.h')
| -rw-r--r-- | intern/cycles/kernel/kernel_random.h | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/intern/cycles/kernel/kernel_random.h b/intern/cycles/kernel/kernel_random.h index bf3c25d2cb2..94598e2565e 100644 --- a/intern/cycles/kernel/kernel_random.h +++ b/intern/cycles/kernel/kernel_random.h @@ -232,14 +232,14 @@ ccl_device void path_rng_end(KernelGlobals *kg, ccl_global uint *rng_state, RNG /* Linear Congruential Generator */ -ccl_device uint lcg_step_uint(ccl_addr_space uint *rng) +ccl_device uint lcg_step_uint(uint *rng) { /* implicit mod 2^32 */ *rng = (1103515245*(*rng) + 12345); return *rng; } -ccl_device float lcg_step_float(ccl_addr_space uint *rng) +ccl_device float lcg_step_float(uint *rng) { /* implicit mod 2^32 */ *rng = (1103515245*(*rng) + 12345); @@ -314,5 +314,21 @@ ccl_device_inline uint lcg_state_init(RNG *rng, const ccl_addr_space PathState * return lcg_init(*rng + state->rng_offset + state->sample*scramble); } +/* TODO(sergey): For until we can use generic address space from OpenCL 2.0. */ + +ccl_device_inline uint lcg_state_init_addrspace(ccl_addr_space RNG *rng, + const ccl_addr_space PathState *state, + uint scramble) +{ + return lcg_init(*rng + state->rng_offset + state->sample*scramble); +} + +ccl_device float lcg_step_float_addrspace(ccl_addr_space uint *rng) +{ + /* implicit mod 2^32 */ + *rng = (1103515245*(*rng) + 12345); + return (float)*rng * (1.0f/(float)0xFFFFFFFF); +} + CCL_NAMESPACE_END |