diff options
| author | Brecht Van Lommel <brecht@blender.org> | 2022-08-11 17:53:11 +0300 |
|---|---|---|
| committer | Brecht Van Lommel <brecht@blender.org> | 2022-08-15 14:48:02 +0300 |
| commit | e949d6da5bd347663addd583ff3f0211c96b81c8 (patch) | |
| tree | 4a7478de4eb8fbd4c67989d94bc8e7c0353bca94 /intern/cycles/kernel/geom | |
| parent | d8841d0aa341e05c8cb9559b116b7e2a9ec11882 (diff) | |
Cycles: simplify handling of ray differentials
* Store compact ray differentials in ShaderData and compute full differentials
on demand. This reduces register pressure on the GPU.
* Remove BSDF differential code that was effectively doing nothing as the
differential orientation was discarded when making it compact.
This gives a 1-5% speedup with RTX A6000 + OptiX in our benchmarks, with the
bigger speedups in simpler scenes.
Renders appear to be identical except for the Both displacement option that
does both displacement and bump.
Differential Revision: https://developer.blender.org/D15677
Diffstat (limited to 'intern/cycles/kernel/geom')
| -rw-r--r-- | intern/cycles/kernel/geom/shader_data.h | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/intern/cycles/kernel/geom/shader_data.h b/intern/cycles/kernel/geom/shader_data.h index 5af89b45f20..028c03ace1d 100644 --- a/intern/cycles/kernel/geom/shader_data.h +++ b/intern/cycles/kernel/geom/shader_data.h @@ -123,9 +123,9 @@ ccl_device_inline void shader_setup_from_ray(KernelGlobals kg, #ifdef __RAY_DIFFERENTIALS__ /* differentials */ - differential_transfer_compact(&sd->dP, ray->dP, ray->D, ray->dD, sd->Ng, sd->ray_length); - differential_incoming_compact(&sd->dI, ray->D, ray->dD); - differential_dudv(&sd->du, &sd->dv, sd->dPdu, sd->dPdv, sd->dP, sd->Ng); + sd->dP = differential_transfer_compact(ray->dP, ray->D, ray->dD, sd->ray_length); + sd->dI = differential_incoming_compact(ray->dD); + differential_dudv_compact(&sd->du, &sd->dv, sd->dPdu, sd->dPdv, sd->dP, sd->Ng); #endif } @@ -240,8 +240,8 @@ ccl_device_inline void shader_setup_from_sample(KernelGlobals kg, #ifdef __RAY_DIFFERENTIALS__ /* no ray differentials here yet */ - sd->dP = differential3_zero(); - sd->dI = differential3_zero(); + sd->dP = differential_zero_compact(); + sd->dI = differential_zero_compact(); sd->du = differential_zero(); sd->dv = differential_zero(); #endif @@ -348,8 +348,8 @@ ccl_device void shader_setup_from_curve(KernelGlobals kg, /* No ray differentials currently. */ #ifdef __RAY_DIFFERENTIALS__ - sd->dP = differential3_zero(); - sd->dI = differential3_zero(); + sd->dP = differential_zero_compact(); + sd->dI = differential_zero_compact(); sd->du = differential_zero(); sd->dv = differential_zero(); #endif @@ -391,8 +391,8 @@ ccl_device_inline void shader_setup_from_background(KernelGlobals kg, #ifdef __RAY_DIFFERENTIALS__ /* differentials */ - sd->dP = differential3_zero(); /* TODO: ray->dP */ - differential_incoming(&sd->dI, sd->dP); + sd->dP = differential_zero_compact(); /* TODO: ray->dP */ + sd->dI = differential_zero_compact(); sd->du = differential_zero(); sd->dv = differential_zero(); #endif @@ -433,8 +433,8 @@ ccl_device_inline void shader_setup_from_volume(KernelGlobals kg, # ifdef __RAY_DIFFERENTIALS__ /* differentials */ - sd->dP = differential3_zero(); /* TODO ray->dD */ - differential_incoming(&sd->dI, sd->dP); + sd->dP = differential_zero_compact(); /* TODO ray->dD */ + sd->dI = differential_zero_compact(); sd->du = differential_zero(); sd->dv = differential_zero(); # endif |