diff options
author | Brecht Van Lommel <brechtvanlommel@gmail.com> | 2017-08-06 22:14:58 +0300 |
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committer | Brecht Van Lommel <brechtvanlommel@gmail.com> | 2017-08-12 21:40:38 +0300 |
commit | 601f94a3c2024343c4c473c5cf079f6c02a2ab77 (patch) | |
tree | 3ca4ed7704f8537e5ec556087eae4f862006d52f /intern/cycles | |
parent | 6919393a5150d7e788edbfd1410e16b5a78a1160 (diff) |
Code cleanup: remove unused Cycles random number code.
Diffstat (limited to 'intern/cycles')
-rw-r--r-- | intern/cycles/kernel/kernel_path.h | 2 | ||||
-rw-r--r-- | intern/cycles/kernel/kernel_path_branched.h | 2 | ||||
-rw-r--r-- | intern/cycles/kernel/kernel_random.h | 116 | ||||
-rw-r--r-- | intern/cycles/kernel/split/kernel_buffer_update.h | 3 | ||||
-rw-r--r-- | intern/cycles/kernel/split/kernel_path_init.h | 1 |
5 files changed, 7 insertions, 117 deletions
diff --git a/intern/cycles/kernel/kernel_path.h b/intern/cycles/kernel/kernel_path.h index 2a801597649..4f98306724b 100644 --- a/intern/cycles/kernel/kernel_path.h +++ b/intern/cycles/kernel/kernel_path.h @@ -825,8 +825,6 @@ ccl_device void kernel_path_trace(KernelGlobals *kg, else { kernel_write_result(kg, buffer, sample, NULL, 0.0f, false); } - - path_rng_end(kg, rng_state, rng); } #endif /* __SPLIT_KERNEL__ */ diff --git a/intern/cycles/kernel/kernel_path_branched.h b/intern/cycles/kernel/kernel_path_branched.h index 17facfa9a78..5d8ea009ce7 100644 --- a/intern/cycles/kernel/kernel_path_branched.h +++ b/intern/cycles/kernel/kernel_path_branched.h @@ -673,8 +673,6 @@ ccl_device void kernel_branched_path_trace(KernelGlobals *kg, else { kernel_write_result(kg, buffer, sample, NULL, 0.0f, false); } - - path_rng_end(kg, rng_state, rng); } #endif /* __SPLIT_KERNEL__ */ diff --git a/intern/cycles/kernel/kernel_random.h b/intern/cycles/kernel/kernel_random.h index e8a912ccc0b..9f91d045bf6 100644 --- a/intern/cycles/kernel/kernel_random.h +++ b/intern/cycles/kernel/kernel_random.h @@ -28,42 +28,6 @@ CCL_NAMESPACE_BEGIN /* High Dimensional Sobol. */ -/* Van der Corput radical inverse. */ -ccl_device uint van_der_corput(uint bits) -{ - bits = (bits << 16) | (bits >> 16); - bits = ((bits & 0x00ff00ff) << 8) | ((bits & 0xff00ff00) >> 8); - bits = ((bits & 0x0f0f0f0f) << 4) | ((bits & 0xf0f0f0f0) >> 4); - bits = ((bits & 0x33333333) << 2) | ((bits & 0xcccccccc) >> 2); - bits = ((bits & 0x55555555) << 1) | ((bits & 0xaaaaaaaa) >> 1); - return bits; -} - -/* Sobol radical inverse. */ -ccl_device uint sobol(uint i) -{ - uint r = 0; - for(uint v = 1U << 31; i; i >>= 1, v ^= v >> 1) { - if(i & 1) { - r ^= v; - } - } - return r; -} - -/* Inverse of sobol radical inverse. */ -ccl_device uint sobol_inverse(uint i) -{ - const uint msb = 1U << 31; - uint r = 0; - for(uint v = 1; i; i <<= 1, v ^= v << 1) { - if(i & msb) { - r ^= v; - } - } - return r; -} - /* Multidimensional sobol with generator matrices * dimension 0 and 1 are equal to van_der_corput() and sobol() respectively. */ @@ -79,31 +43,6 @@ ccl_device uint sobol_dimension(KernelGlobals *kg, int index, int dimension) return result; } -/* Lookup index and x/y coordinate, assumes m is a power of two. */ -ccl_device uint sobol_lookup(const uint m, - const uint frame, - const uint ex, - const uint ey, - uint *x, uint *y) -{ - /* Shift is constant per frame. */ - const uint shift = frame << (m << 1); - const uint sobol_shift = sobol(shift); - /* Van der Corput is its own inverse. */ - const uint lower = van_der_corput(ex << (32 - m)); - /* Need to compensate for ey difference and shift. */ - const uint sobol_lower = sobol(lower); - const uint mask = ~-(1 << m) << (32 - m); /* Only m upper bits. */ - const uint delta = ((ey << (32 - m)) ^ sobol_lower ^ sobol_shift) & mask; - /* Only use m upper bits for the index (m is a power of two). */ - const uint sobol_result = delta | (delta >> m); - const uint upper = sobol_inverse(sobol_result); - const uint index = shift | upper | lower; - *x = van_der_corput(index); - *y = sobol_shift ^ sobol_result ^ sobol_lower; - return index; -} - ccl_device_forceinline float path_rng_1D(KernelGlobals *kg, RNG *rng, int sample, int num_samples, @@ -117,11 +56,6 @@ ccl_device_forceinline float path_rng_1D(KernelGlobals *kg, } #endif -#ifdef __SOBOL_FULL_SCREEN__ - uint result = sobol_dimension(kg, *rng, dimension); - float r = (float)result * (1.0f/(float)0xFFFFFFFF); - return r; -#else /* Compute sobol sequence value using direction vectors. */ uint result = sobol_dimension(kg, sample + SOBOL_SKIP, dimension); float r = (float)result * (1.0f/(float)0xFFFFFFFF); @@ -136,7 +70,6 @@ ccl_device_forceinline float path_rng_1D(KernelGlobals *kg, shift = tmp_rng * (1.0f/(float)0xFFFFFFFF); return r + shift - floorf(r + shift); -#endif } ccl_device_forceinline void path_rng_2D(KernelGlobals *kg, @@ -167,25 +100,6 @@ ccl_device_inline void path_rng_init(KernelGlobals *kg, int x, int y, float *fx, float *fy) { -#ifdef __SOBOL_FULL_SCREEN__ - uint px, py; - uint bits = 16; /* limits us to 65536x65536 and 65536 samples */ - uint size = 1 << bits; - uint frame = sample; - - *rng = sobol_lookup(bits, frame, x, y, &px, &py); - - *rng ^= kernel_data.integrator.seed; - - if(sample == 0) { - *fx = 0.5f; - *fy = 0.5f; - } - else { - *fx = size * (float)px * (1.0f/(float)0xFFFFFFFF) - x; - *fy = size * (float)py * (1.0f/(float)0xFFFFFFFF) - y; - } -#else *rng = *rng_state; *rng ^= kernel_data.integrator.seed; @@ -197,28 +111,19 @@ ccl_device_inline void path_rng_init(KernelGlobals *kg, else { path_rng_2D(kg, rng, sample, num_samples, PRNG_FILTER_U, fx, fy); } -#endif -} - -ccl_device void path_rng_end(KernelGlobals *kg, - ccl_global uint *rng_state, - RNG rng) -{ - /* nothing to do */ } #else /* __SOBOL__ */ -/* Linear Congruential Generator */ +/* Pseudo random numbers, use this only on the CPU with a single thread + * for debugging correlations. */ ccl_device_forceinline float path_rng_1D(KernelGlobals *kg, RNG *rng, int sample, int num_samples, int dimension) { - /* implicit mod 2^32 */ - *rng = (1103515245*(*rng) + 12345); - return (float)*rng * (1.0f/(float)0xFFFFFFFF); + return (float)drand48(); } ccl_device_inline void path_rng_2D(KernelGlobals *kg, @@ -227,8 +132,8 @@ ccl_device_inline void path_rng_2D(KernelGlobals *kg, int dimension, float *fx, float *fy) { - *fx = path_rng_1D(kg, rng, sample, num_samples, dimension); - *fy = path_rng_1D(kg, rng, sample, num_samples, dimension + 1); + *fx = (float)drand48(); + *fy = (float)drand48(); } ccl_device void path_rng_init(KernelGlobals *kg, @@ -240,9 +145,10 @@ ccl_device void path_rng_init(KernelGlobals *kg, { /* load state */ *rng = *rng_state; - *rng ^= kernel_data.integrator.seed; + srand48(*rng); + if(sample == 0) { *fx = 0.5f; *fy = 0.5f; @@ -252,14 +158,6 @@ ccl_device void path_rng_init(KernelGlobals *kg, } } -ccl_device void path_rng_end(KernelGlobals *kg, - ccl_global uint *rng_state, - RNG rng) -{ - /* store state for next sample */ - *rng_state = rng; -} - #endif /* __SOBOL__ */ /* Linear Congruential Generator */ diff --git a/intern/cycles/kernel/split/kernel_buffer_update.h b/intern/cycles/kernel/split/kernel_buffer_update.h index 4c1fdd2d69c..ed47983e618 100644 --- a/intern/cycles/kernel/split/kernel_buffer_update.h +++ b/intern/cycles/kernel/split/kernel_buffer_update.h @@ -119,8 +119,6 @@ ccl_device void kernel_buffer_update(KernelGlobals *kg, bool is_shadow_catcher = (state->flag & PATH_RAY_SHADOW_CATCHER); kernel_write_result(kg, buffer, sample, L, 1.0f - (*L_transparent), is_shadow_catcher); - path_rng_end(kg, rng_state, rng); - ASSIGN_RAY_STATE(ray_state, ray_index, RAY_TO_REGENERATE); } @@ -169,7 +167,6 @@ ccl_device void kernel_buffer_update(KernelGlobals *kg, float4 L_rad = make_float4(0.0f, 0.0f, 0.0f, 0.0f); /* Accumulate result in output buffer. */ kernel_write_pass_float4(buffer, sample, L_rad); - path_rng_end(kg, rng_state, rng); ASSIGN_RAY_STATE(ray_state, ray_index, RAY_TO_REGENERATE); } diff --git a/intern/cycles/kernel/split/kernel_path_init.h b/intern/cycles/kernel/split/kernel_path_init.h index a7ecde7c80d..296983e4e21 100644 --- a/intern/cycles/kernel/split/kernel_path_init.h +++ b/intern/cycles/kernel/split/kernel_path_init.h @@ -96,7 +96,6 @@ ccl_device void kernel_path_init(KernelGlobals *kg) { float4 L_rad = make_float4(0.0f, 0.0f, 0.0f, 0.0f); /* Accumulate result in output buffer. */ kernel_write_pass_float4(buffer, my_sample, L_rad); - path_rng_end(kg, rng_state, kernel_split_state.rng[ray_index]); ASSIGN_RAY_STATE(kernel_split_state.ray_state, ray_index, RAY_TO_REGENERATE); } kernel_split_state.rng[ray_index] = rng; |