diff options
Diffstat (limited to 'intern/cycles/blender/shader.cpp')
| -rw-r--r-- | intern/cycles/blender/shader.cpp | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/intern/cycles/blender/shader.cpp b/intern/cycles/blender/shader.cpp index 81a64457c88..4218a9a8a68 100644 --- a/intern/cycles/blender/shader.cpp +++ b/intern/cycles/blender/shader.cpp @@ -928,8 +928,22 @@ static ShaderNode *add_node(Scene *scene, sky->set_sun_disc(b_sky_node.sun_disc()); sky->set_sun_size(b_sky_node.sun_size()); sky->set_sun_intensity(b_sky_node.sun_intensity()); - sky->set_sun_elevation(b_sky_node.sun_elevation()); - sky->set_sun_rotation(b_sky_node.sun_rotation()); + /* Patch sun position to be able to animate daylight cycle while keeping the shading code + * simple. */ + float sun_rotation = b_sky_node.sun_rotation(); + /* Wrap into [-2PI..2PI] range. */ + float sun_elevation = fmodf(b_sky_node.sun_elevation(), M_2PI_F); + /* Wrap into [-PI..PI] range. */ + if (fabsf(sun_elevation) >= M_PI_F) { + sun_elevation -= copysignf(2.0f, sun_elevation) * M_PI_F; + } + /* Wrap into [-PI/2..PI/2] range while keeping the same absolute position. */ + if (sun_elevation >= M_PI_2_F || sun_elevation <= -M_PI_2_F) { + sun_elevation = copysignf(M_PI_F, sun_elevation) - sun_elevation; + sun_rotation += M_PI_F; + } + sky->set_sun_elevation(sun_elevation); + sky->set_sun_rotation(sun_rotation); sky->set_altitude(b_sky_node.altitude()); sky->set_air_density(b_sky_node.air_density()); sky->set_dust_density(b_sky_node.dust_density()); |