diff options
Diffstat (limited to 'intern/cycles/render/light.cpp')
| -rw-r--r-- | intern/cycles/render/light.cpp | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/intern/cycles/render/light.cpp b/intern/cycles/render/light.cpp index c0615c6217b..183c02cb6b9 100644 --- a/intern/cycles/render/light.cpp +++ b/intern/cycles/render/light.cpp @@ -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); |