Differential D7232 Diff 23086 intern/cycles/kernel/kernel_subsurface.h

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intern/cycles/kernel/kernel_subsurface.h

Show First 20 Lines • Show All 422 Lines • ▼ Show 20 Lines	for (int bounce = 0; bounce < BSSRDF_MAX_BOUNCES; bounce++) {
float sample_sigma_t = kernel_volume_channel_get(sigma_t, channel);		float sample_sigma_t = kernel_volume_channel_get(sigma_t, channel);
float t = -logf(1.0f - rdist) / sample_sigma_t;		float t = -logf(1.0f - rdist) / sample_sigma_t;

ray->t = t;		ray->t = t;
scene_intersect_local(kg, ray, ss_isect, sd->object, NULL, 1);		scene_intersect_local(kg, ray, ss_isect, sd->object, NULL, 1);
hit = (ss_isect->num_hits > 0);		hit = (ss_isect->num_hits > 0);

if (hit) {		if (hit) {
		#ifdef __KERNEL_OPTIX__
		/* t is always in world space with OptiX. */
		t = ss_isect->hits[0].t;
		#else
/* Compute world space distance to surface hit. */		/* Compute world space distance to surface hit. */
float3 D = ray->D;		float3 D = ray->D;
object_inverse_dir_transform(kg, sd, &D);		object_inverse_dir_transform(kg, sd, &D);
D = normalize(D) * ss_isect->hits[0].t;		D = normalize(D) * ss_isect->hits[0].t;
object_dir_transform(kg, sd, &D);		object_dir_transform(kg, sd, &D);
t = len(D);		t = len(D);
		#endif
}		}

/* Advance to new scatter location. */		/* Advance to new scatter location. */
ray->P += t * ray->D;		ray->P += t * ray->D;

/* Update throughput. */		/* Update throughput. */
float3 transmittance = volume_color_transmittance(sigma_t, t);		float3 transmittance = volume_color_transmittance(sigma_t, t);
float pdf = dot(channel_pdf, (hit) ? transmittance : sigma_t * transmittance);		float pdf = dot(channel_pdf, (hit) ? transmittance : sigma_t * transmittance);
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