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Diffstat (limited to 'intern/cycles/kernel/kernel_random.h')
| -rw-r--r-- | intern/cycles/kernel/kernel_random.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/intern/cycles/kernel/kernel_random.h b/intern/cycles/kernel/kernel_random.h index c86ac34a057..be848d9bb16 100644 --- a/intern/cycles/kernel/kernel_random.h +++ b/intern/cycles/kernel/kernel_random.h @@ -235,7 +235,14 @@ __device void path_rng_end(KernelGlobals *kg, __global uint *rng_state, RNG rng) #endif -__device float lcg_step(uint *rng) +__device uint lcg_step_uint(uint *rng) +{ + /* implicit mod 2^32 */ + *rng = (1103515245*(*rng) + 12345); + return *rng; +} + +__device float lcg_step_float(uint *rng) { /* implicit mod 2^32 */ *rng = (1103515245*(*rng) + 12345); @@ -245,7 +252,7 @@ __device float lcg_step(uint *rng) __device uint lcg_init(uint seed) { uint rng = seed; - lcg_step(&rng); + lcg_step_uint(&rng); return rng; } |