forked from bartvdbraak/blender
Fix T73064: Embree does not like Bevel shader
Embree's local intersection routine was not prepared for local intersections without per-object BVH. Now it should be able to handle any kind of local intersection, such as AO, bevel and SSS. Differential Revision: https://developer.blender.org/D6602
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@ -146,7 +146,21 @@ static void rtc_filter_occluded_func(const RTCFilterFunctionNArguments *args)
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}
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break;
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}
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case CCLIntersectContext::RAY_LOCAL:
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case CCLIntersectContext::RAY_SSS: {
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/* Check if it's hitting the correct object. */
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Intersection current_isect;
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if (ctx->type == CCLIntersectContext::RAY_SSS) {
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kernel_embree_convert_sss_hit(kg, ray, hit, ¤t_isect, ctx->local_object_id);
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}
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else {
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kernel_embree_convert_hit(kg, ray, hit, ¤t_isect);
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if (ctx->local_object_id != current_isect.object) {
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/* This tells Embree to continue tracing. */
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*args->valid = 0;
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}
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}
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/* No intersection information requested, just return a hit. */
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if (ctx->max_hits == 0) {
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break;
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@ -160,8 +174,8 @@ static void rtc_filter_occluded_func(const RTCFilterFunctionNArguments *args)
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}
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/* See triangle_intersect_subsurface() for the native equivalent. */
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for (int i = min(ctx->max_hits, ctx->ss_isect->num_hits) - 1; i >= 0; --i) {
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if (ctx->ss_isect->hits[i].t == ray->tfar) {
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for (int i = min(ctx->max_hits, ctx->local_isect->num_hits) - 1; i >= 0; --i) {
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if (ctx->local_isect->hits[i].t == ray->tfar) {
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/* This tells Embree to continue tracing. */
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*args->valid = 0;
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break;
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@ -172,14 +186,14 @@ static void rtc_filter_occluded_func(const RTCFilterFunctionNArguments *args)
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if (ctx->lcg_state) {
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++ctx->ss_isect->num_hits;
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if (ctx->ss_isect->num_hits <= ctx->max_hits) {
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hit_idx = ctx->ss_isect->num_hits - 1;
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++ctx->local_isect->num_hits;
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if (ctx->local_isect->num_hits <= ctx->max_hits) {
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hit_idx = ctx->local_isect->num_hits - 1;
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}
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else {
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/* reservoir sampling: if we are at the maximum number of
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* hits, randomly replace element or skip it */
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hit_idx = lcg_step_uint(ctx->lcg_state) % ctx->ss_isect->num_hits;
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hit_idx = lcg_step_uint(ctx->lcg_state) % ctx->local_isect->num_hits;
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if (hit_idx >= ctx->max_hits) {
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/* This tells Embree to continue tracing. */
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@ -189,15 +203,11 @@ static void rtc_filter_occluded_func(const RTCFilterFunctionNArguments *args)
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}
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}
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else {
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ctx->ss_isect->num_hits = 1;
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ctx->local_isect->num_hits = 1;
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}
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/* record intersection */
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kernel_embree_convert_local_hit(
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kg, ray, hit, &ctx->ss_isect->hits[hit_idx], ctx->sss_object_id);
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ctx->ss_isect->Ng[hit_idx].x = hit->Ng_x;
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ctx->ss_isect->Ng[hit_idx].y = hit->Ng_y;
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ctx->ss_isect->Ng[hit_idx].z = hit->Ng_z;
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ctx->ss_isect->Ng[hit_idx] = normalize(ctx->ss_isect->Ng[hit_idx]);
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ctx->local_isect->hits[hit_idx] = current_isect;
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ctx->local_isect->Ng[hit_idx] = normalize(make_float3(hit->Ng_x, hit->Ng_y, hit->Ng_z));
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/* This tells Embree to continue tracing .*/
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*args->valid = 0;
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break;
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@ -329,24 +329,26 @@ ccl_device_intersect bool scene_intersect_local(KernelGlobals *kg,
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# ifdef __EMBREE__
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if (kernel_data.bvh.scene) {
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CCLIntersectContext ctx(kg, CCLIntersectContext::RAY_SSS);
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const bool has_bvh = !(kernel_tex_fetch(__object_flag, local_object) &
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SD_OBJECT_TRANSFORM_APPLIED);
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CCLIntersectContext ctx(
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kg, has_bvh ? CCLIntersectContext::RAY_SSS : CCLIntersectContext::RAY_LOCAL);
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ctx.lcg_state = lcg_state;
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ctx.max_hits = max_hits;
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ctx.ss_isect = local_isect;
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ctx.local_isect = local_isect;
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local_isect->num_hits = 0;
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ctx.sss_object_id = local_object;
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ctx.local_object_id = local_object;
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IntersectContext rtc_ctx(&ctx);
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RTCRay rtc_ray;
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kernel_embree_setup_ray(*ray, rtc_ray, PATH_RAY_ALL_VISIBILITY);
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/* Get the Embree scene for this intersection. */
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RTCGeometry geom = rtcGetGeometry(kernel_data.bvh.scene, local_object * 2);
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if (geom) {
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float3 P = ray->P;
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float3 dir = ray->D;
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float3 idir = ray->D;
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const int object_flag = kernel_tex_fetch(__object_flag, local_object);
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if (!(object_flag & SD_OBJECT_TRANSFORM_APPLIED)) {
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/* If this object has its own BVH, use it. */
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if (has_bvh) {
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RTCGeometry geom = rtcGetGeometry(kernel_data.bvh.scene, local_object * 2);
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if (geom) {
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float3 P = ray->P;
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float3 dir = ray->D;
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float3 idir = ray->D;
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Transform ob_itfm;
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rtc_ray.tfar = bvh_instance_motion_push(
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kg, local_object, ray, &P, &dir, &idir, ray->t, &ob_itfm);
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@ -360,11 +362,15 @@ ccl_device_intersect bool scene_intersect_local(KernelGlobals *kg,
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rtc_ray.dir_x = dir.x;
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rtc_ray.dir_y = dir.y;
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rtc_ray.dir_z = dir.z;
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RTCScene scene = (RTCScene)rtcGetGeometryUserData(geom);
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kernel_assert(scene);
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if (scene) {
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rtcOccluded1(scene, &rtc_ctx.context, &rtc_ray);
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}
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}
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RTCScene scene = (RTCScene)rtcGetGeometryUserData(geom);
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if (scene) {
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rtcOccluded1(scene, &rtc_ctx.context, &rtc_ray);
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}
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}
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else {
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rtcOccluded1(kernel_data.bvh.scene, &rtc_ctx.context, &rtc_ray);
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}
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return local_isect->num_hits > 0;
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@ -28,9 +28,9 @@ struct CCLIntersectContext {
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typedef enum {
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RAY_REGULAR = 0,
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RAY_SHADOW_ALL = 1,
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RAY_SSS = 2,
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RAY_VOLUME_ALL = 3,
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RAY_LOCAL = 2,
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RAY_SSS = 3,
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RAY_VOLUME_ALL = 4,
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} RayType;
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KernelGlobals *kg;
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@ -42,8 +42,8 @@ struct CCLIntersectContext {
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int num_hits;
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/* for SSS Rays: */
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LocalIntersection *ss_isect;
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int sss_object_id;
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LocalIntersection *local_isect;
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int local_object_id;
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uint *lcg_state;
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CCLIntersectContext(KernelGlobals *kg_, RayType type_)
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@ -53,8 +53,8 @@ struct CCLIntersectContext {
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max_hits = 1;
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num_hits = 0;
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isect_s = NULL;
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ss_isect = NULL;
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sss_object_id = -1;
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local_isect = NULL;
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local_object_id = -1;
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lcg_state = NULL;
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}
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};
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@ -121,11 +121,11 @@ ccl_device_inline void kernel_embree_convert_hit(KernelGlobals *kg,
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isect->type = kernel_tex_fetch(__prim_type, isect->prim);
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}
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ccl_device_inline void kernel_embree_convert_local_hit(KernelGlobals *kg,
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const RTCRay *ray,
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const RTCHit *hit,
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Intersection *isect,
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int local_object_id)
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ccl_device_inline void kernel_embree_convert_sss_hit(KernelGlobals *kg,
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const RTCRay *ray,
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const RTCHit *hit,
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Intersection *isect,
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int local_object_id)
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{
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isect->u = 1.0f - hit->v - hit->u;
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isect->v = hit->u;
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