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Need to do the same light power as Cycles in Watts for Hydra RPR #34

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Bogdan Nagirniak merged 12 commits from BLEN-386 into hydra-render 2023-05-05 08:42:35 +02:00
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1 changed files with 7 additions and 9 deletions
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source/blender/render/hydra/scene_delegate/light.cc
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@ -25,8 +25,6 @@ void LightData::init()
{ {
ID_LOG(2, ""); ID_LOG(2, "");
const float round_tolerance = 0.00001f;
Light *light = (Light *)((Object *)id)->data; Light *light = (Light *)((Object *)id)->data;
Brian Savery (AMD) commented 2023-05-03 18:52:54 +02:00
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the name here is strange. Maybe "radius_threshold". And please add a comment why.

the name here is strange. Maybe "radius_threshold". And please add a comment why.
Bogdan Nagirniak commented 2023-05-03 21:17:58 +02:00
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use FLT_EPSILON

use FLT_EPSILON
Georgiy Markelov commented 2023-05-04 10:17:57 +02:00
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Changed round_tolerance -> FLT_EPSILON. Added comment.

Changed round_tolerance -> FLT_EPSILON. Added comment.
data_.clear(); data_.clear();
@ -35,14 +33,14 @@ void LightData::init()
Bogdan Nagirniak commented 2023-05-03 09:45:15 +02:00
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Do we still need this multiplication?

Do we still need this multiplication?
switch (light->type) { switch (light->type) {
case LA_LOCAL: case LA_LOCAL:
if (light->radius > round_tolerance) { if (light->radius > FLT_EPSILON) { /* extremely small object should be considered as point */
data_[pxr::HdLightTokens->radius] = light->radius; data_[pxr::HdLightTokens->radius] = light->radius;
data_[pxr::HdLightTokens->normalize] = true; data_[pxr::HdLightTokens->normalize] = true;
} }
else { else {
Bogdan Nagirniak commented 2023-05-03 09:47:02 +02:00
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if radius == 0, maybe data_[pxr::UsdLuxTokens->treatAsPoint] = true; ?

if radius == 0, maybe `data_[pxr::UsdLuxTokens->treatAsPoint] = true;` ?
data_[pxr::UsdLuxTokens->treatAsPoint] = true; data_[pxr::UsdLuxTokens->treatAsPoint] = true;
} }
intensity /= 40.0f; intensity /= 40.0f; /* coefficient approximated to follow RPR results */
break; break;
Brian Savery (AMD) commented 2023-05-03 18:51:37 +02:00
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This seems like a strange value. How was this found?

This seems like a strange value. How was this found?
Georgiy Markelov commented 2023-05-04 10:17:22 +02:00
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Every value has been found empirically.

Every value has been found empirically.
case LA_SUN: case LA_SUN:
@ -54,7 +52,7 @@ void LightData::init()
float(M_PI); float(M_PI);
data_[pxr::UsdLuxTokens->inputsShapingConeSoftness] = light->spotblend; data_[pxr::UsdLuxTokens->inputsShapingConeSoftness] = light->spotblend;
data_[pxr::UsdLuxTokens->treatAsPoint] = true; data_[pxr::UsdLuxTokens->treatAsPoint] = true;
intensity /= 10.0f; intensity /= 10.0f; /* coefficient approximated to follow RPR results */
break; break;
case LA_AREA: case LA_AREA:
@ -62,22 +60,22 @@ void LightData::init()
case LA_AREA_SQUARE: case LA_AREA_SQUARE:
data_[pxr::HdLightTokens->width] = light->area_size; data_[pxr::HdLightTokens->width] = light->area_size;
data_[pxr::HdLightTokens->height] = light->area_size; data_[pxr::HdLightTokens->height] = light->area_size;
intensity /= 4.0f; intensity /= 4.0f; /* coefficient approximated to follow RPR results */
break; break;
case LA_AREA_RECT: case LA_AREA_RECT:
data_[pxr::HdLightTokens->width] = light->area_size; data_[pxr::HdLightTokens->width] = light->area_size;
data_[pxr::HdLightTokens->height] = light->area_sizey; data_[pxr::HdLightTokens->height] = light->area_sizey;
intensity /= 4.0f; intensity /= 4.0f; /* coefficient approximated to follow RPR results */
break; break;
case LA_AREA_DISK: case LA_AREA_DISK:
data_[pxr::HdLightTokens->radius] = light->area_size / 2.0f; data_[pxr::HdLightTokens->radius] = light->area_size / 2.0f;
intensity /= 16.0f; intensity /= 16.0f; /* coefficient approximated to follow RPR results */
break; break;
case LA_AREA_ELLIPSE: case LA_AREA_ELLIPSE:
data_[pxr::HdLightTokens->radius] = (light->area_size + light->area_sizey) / 4.0f; data_[pxr::HdLightTokens->radius] = (light->area_size + light->area_sizey) / 4.0f;
intensity /= 16.0f; intensity /= 16.0f; /* coefficient approximated to follow RPR results */
break; break;
default: default: