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Differential D13991 Diff 47856 intern/cycles/kernel/light/light.h

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intern/cycles/kernel/light/light.h

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ls->P = make_float3(klight->co[0], klight->co[1], klight->co[2]); ls->P = make_float3(klight->co[0], klight->co[1], klight->co[2]);
if (type == LIGHT_SPOT) { if (type == LIGHT_SPOT) {
ls->Ng = make_float3(klight->spot.dir[0], klight->spot.dir[1], klight->spot.dir[2]); const float3 center = make_float3(klight->co[0], klight->co[1], klight->co[2]);
float radius = klight->spot.radius; const float radius = klight->spot.radius;
const float3 dir = make_float3(klight->spot.dir[0], klight->spot.dir[1], klight->spot.dir[2]);
/* disk oriented normal */
const float3 lightN = normalize(P - center);
ls->P = center;
if (radius > 0.0f) if (radius > 0.0f)
/* sphere light */ /* disk light */
ls->P += disk_light_sample(ls->Ng, randu, randv) * radius; ls->P += disk_light_sample(lightN, randu, randv) * radius;
const float invarea = klight->spot.invarea;
ls->pdf = invarea;
ls->D = normalize_len(ls->P - P, &ls->t); ls->D = normalize_len(ls->P - P, &ls->t);
/* we set the light normal to the outgoing direction to support texturing */
ls->Ng = -ls->D;
float invarea = klight->spot.invarea;
ls->eval_fac = (0.25f * M_1_PI_F) * invarea; ls->eval_fac = (0.25f * M_1_PI_F) * invarea;
ls->pdf = invarea;
/* spot light attenuation */ /* spot light attenuation */
ls->eval_fac *= spot_light_attenuation( ls->eval_fac *= spot_light_attenuation(
ls->Ng, klight->spot.spot_angle, klight->spot.spot_smooth, -ls->D); dir, klight->spot.spot_angle, klight->spot.spot_smooth, -ls->D);
if (!in_volume_segment && ls->eval_fac == 0.0f) { if (!in_volume_segment && ls->eval_fac == 0.0f) {
return false; return false;
} }
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ls->u = uv.x; ls->u = uv.x;
ls->v = uv.y; ls->v = uv.y;
ls->pdf *= lamp_light_pdf(kg, ls->Ng, -ls->D, ls->t); ls->pdf *= lamp_light_pdf(kg, lightN, -ls->D, ls->t);
} }
else if (type == LIGHT_POINT) { else if (type == LIGHT_POINT) {
float3 center = make_float3(klight->co[0], klight->co[1], klight->co[2]); float3 center = make_float3(klight->co[0], klight->co[1], klight->co[2]);
float radius = klight->spot.radius; float radius = klight->spot.radius;
/* disk oriented normal */
const float3 lightN = normalize(P - center);
ls->P = center; ls->P = center;
float pdf = 1.0;
if (radius > 0.0f) { if (radius > 0.0f) {
ls->Ng = normalize(P - center); ls->P += disk_light_sample(lightN, randu, randv) * radius;
ls->P += disk_light_sample(ls->Ng, randu, randv) * radius;
pdf = klight->spot.invarea;
ls->D = normalize_len(ls->P - P, &ls->t);
}
else {
ls->Ng = normalize(P - center);
} }
ls->pdf = klight->spot.invarea;
ls->D = normalize_len(ls->P - P, &ls->t); ls->D = normalize_len(ls->P - P, &ls->t);
ls->pdf = pdf; /* we set the light normal to the outgoing direction to support texturing */
ls->Ng = -ls->D;
ls->eval_fac = M_1_PI_F * 0.25f * klight->spot.invarea; ls->eval_fac = M_1_PI_F * 0.25f * klight->spot.invarea;
if (!in_volume_segment && ls->eval_fac == 0.0f) {
return false;
}
float2 uv = map_to_sphere(ls->Ng); float2 uv = map_to_sphere(ls->Ng);
ls->u = uv.x; ls->u = uv.x;
ls->v = uv.y; ls->v = uv.y;
ls->pdf *= lamp_light_pdf(kg, ls->Ng, -ls->D, ls->t); ls->pdf *= lamp_light_pdf(kg, lightN, -ls->D, ls->t);
} }
else { else {
/* area light */ /* area light */
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if (type == LIGHT_SPOT) { if (type == LIGHT_SPOT) {
/* Spot/Disk light. */ /* Spot/Disk light. */
const float mis_ray_t = INTEGRATOR_STATE(state, path, mis_ray_t);
const float3 ray_P = ray->P - ray->D * mis_ray_t;
const float3 lightP = make_float3(klight->co[0], klight->co[1], klight->co[2]); const float3 lightP = make_float3(klight->co[0], klight->co[1], klight->co[2]);
const float3 lightN = make_float3(
klight->spot.dir[0], klight->spot.dir[1], klight->spot.dir[2]);
const float radius = klight->spot.radius; const float radius = klight->spot.radius;
if (radius == 0.0f) { if (radius == 0.0f) {
continue; continue;
} }
/* disk oriented normal */
const float3 lightN = normalize(ray_P - lightP);
/* One sided. */ /* One sided. */
if (dot(ray->D, lightN) >= 0.0f) { if (dot(ray->D, lightN) >= 0.0f) {
continue; continue;
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continue; continue;
} }
/* disk oriented normal */
const float3 lightN = normalize(ray_P - lightP);
float3 P; float3 P;
const float3 lsN = normalize(ray_P - lightP); if (!ray_disk_intersect(ray->P, ray->D, ray->t, lightP, lightN, radius, &P, &t)) {
if (!ray_disk_intersect(ray->P, ray->D, ray->t, lightP, lsN, radius, &P, &t)) {
continue; continue;
} }
} }
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ls->D = ray_D; ls->D = ray_D;
if (type == LIGHT_SPOT) { if (type == LIGHT_SPOT) {
ls->Ng = make_float3(klight->spot.dir[0], klight->spot.dir[1], klight->spot.dir[2]); const float3 center = make_float3(klight->co[0], klight->co[1], klight->co[2]);
const float3 dir = make_float3(klight->spot.dir[0], klight->spot.dir[1], klight->spot.dir[2]);
/* the normal of the oriented disk */
const float3 lightN = normalize(ray_P - center);
/* we set the light normal to the outgoing direction to support texturing*/
ls->Ng = -ls->D;
float invarea = klight->spot.invarea; float invarea = klight->spot.invarea;
ls->eval_fac = (0.25f * M_1_PI_F) * invarea; ls->eval_fac = (0.25f * M_1_PI_F) * invarea;
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/* spot light attenuation */ /* spot light attenuation */
ls->eval_fac *= spot_light_attenuation( ls->eval_fac *= spot_light_attenuation(
ls->Ng, klight->spot.spot_angle, klight->spot.spot_smooth, -ls->D); dir, klight->spot.spot_angle, klight->spot.spot_smooth, -ls->D);
if (ls->eval_fac == 0.0f) { if (ls->eval_fac == 0.0f) {
return false; return false;
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/* compute pdf */ /* compute pdf */
if (ls->t != FLT_MAX) if (ls->t != FLT_MAX)
ls->pdf *= lamp_light_pdf(kg, ls->Ng, -ls->D, ls->t); ls->pdf *= lamp_light_pdf(kg, lightN, -ls->D, ls->t);
else
ls->pdf = 0.f;
} }
else if (type == LIGHT_POINT) { else if (type == LIGHT_POINT) {
float3 center = make_float3(klight->co[0], klight->co[1], klight->co[2]); const float3 center = make_float3(klight->co[0], klight->co[1], klight->co[2]);
const float3 lighN = normalize(ray_P - center);
ls->Ng = normalize(ray_P - center); /* we set the light normal to the outgoing direction to support texturing*/
ls->Ng = -ls->D;
float invarea = klight->spot.invarea; float invarea = klight->spot.invarea;
ls->eval_fac = (0.25f * M_1_PI_F) * invarea; ls->eval_fac = (0.25f * M_1_PI_F) * invarea;
ls->pdf = invarea; ls->pdf = invarea;
if (ls->eval_fac == 0.0f) {
return false;
}
float2 uv = map_to_sphere(ls->Ng); float2 uv = map_to_sphere(ls->Ng);
ls->u = uv.x; ls->u = uv.x;
ls->v = uv.y; ls->v = uv.y;
/* compute pdf */ /* compute pdf */
if (ls->t != FLT_MAX) if (ls->t != FLT_MAX)
ls->pdf *= lamp_light_pdf(kg, ls->Ng, -ls->D, ls->t); ls->pdf *= lamp_light_pdf(kg, lighN, -ls->D, ls->t);
else else
ls->pdf = 0.f; ls->pdf = 0.f;
} }
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} }
} }
CCL_NAMESPACE_END CCL_NAMESPACE_END
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