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Cycles: Account for Sky Texture mapping in the sun sampling code 

Differential Revision: https://developer.blender.org/D8091
This commit is contained in:
Lukas Stockner 2020-07-13 01:52:07 +02:00
parent 192bd2605f
commit 7aacf2e119
1 changed files with 10 additions and 4 deletions
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14
intern/cycles/render/light.cpp
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@ -625,13 +625,19 @@ void LightManager::device_update_background(Device *device,
}
}
/* Determine sun direction from lat/long and texture mapping. */
float latitude = sky->sun_elevation;
float longitude = M_2PI_F - sky->sun_rotation + M_PI_2_F;
float3 sun_direction = make_float3(
cosf(latitude) * cosf(longitude), cosf(latitude) * sinf(longitude), sinf(latitude));
Transform sky_transform = transform_inverse(sky->tex_mapping.compute_transform());
sun_direction = transform_direction(&sky_transform, sun_direction);
/* Pack sun direction and size. */
float half_angle = sky->sun_size * 0.5f;
kbackground->sun = make_float4(cosf(latitude) * cosf(longitude),
cosf(latitude) * sinf(longitude),
sinf(latitude),
half_angle);
kbackground->sun = make_float4(
sun_direction.x, sun_direction.y, sun_direction.z, half_angle);
kbackground->sun_weight = 4.0f;
environment_res.x = max(environment_res.x, 512);
environment_res.y = max(environment_res.y, 256);