コード例 #1
0
void OSLShaderGroupExec::execute_transparency(
    const ShaderGroup&              shader_group,
    const ShadingPoint&             shading_point,
    Alpha&                          alpha) const
{
    do_execute(
        shader_group,
        shading_point,
        VisibilityFlags::TransparencyRay);

    process_transparency_tree(shading_point.get_osl_shader_globals().Ci, alpha);
}
コード例 #2
0
void OSLShaderGroupExec::execute_shading(
    const ShaderGroup&          shader_group,
    const ShadingPoint&         shading_point) const
{
    assert(m_osl_shading_context);
    assert(m_osl_thread_info);

    m_osl_shading_system.execute(
        *m_osl_shading_context,
        *shader_group.shadergroup_ref(),
        shading_point.get_osl_shader_globals());
}
コード例 #3
0
void OSLShaderGroupExec::execute_transparency(
    const ShaderGroup&  shader_group,
    const ShadingPoint& shading_point,
    Alpha&              alpha,
    float*              holdout) const
{
    // Switch temporary the ray type to Shadow.
    ShadingRay::TypeType saved_type = shading_point.m_ray.m_type;
    shading_point.m_ray.m_type = ShadingRay::ShadowRay;

    m_osl_shading_system.execute(
        *m_osl_shading_context,
        *shader_group.shadergroup_ref(),
        shading_point.get_osl_shader_globals());

    process_transparency_tree(shading_point.get_osl_shader_globals().Ci, alpha);

    if (holdout)
        *holdout = process_holdout_tree(shading_point.get_osl_shader_globals().Ci);

    // Restore the original ray type.
    shading_point.m_ray.m_type = saved_type;
}
コード例 #4
0
void OSLShaderGroupExec::choose_bsdf_closure_shading_basis(
    const ShadingPoint&             shading_point,
    const Vector2f&                 s) const
{
    CompositeSurfaceClosure c(
        Basis3f(shading_point.get_shading_basis()),
        shading_point.get_osl_shader_globals().Ci,
        m_arena);

    float pdfs[CompositeSurfaceClosure::MaxClosureEntries];
    const size_t num_closures = c.compute_pdfs(ScatteringMode::All, pdfs);
    if (num_closures == 0)
        return;

    const size_t index = c.choose_closure(s[1], num_closures, pdfs);
    shading_point.set_shading_basis(
        Basis3d(c.get_closure_shading_basis(index)));
}
コード例 #5
0
void OSLShaderGroupExec::do_execute(
    const ShaderGroup&              shader_group,
    const ShadingPoint&             shading_point,
    const VisibilityFlags::Type     ray_flags) const
{
    assert(m_osl_shading_context);
    assert(m_osl_thread_info);

    shading_point.initialize_osl_shader_globals(
        shader_group,
        ray_flags,
        m_osl_shading_system.renderer());

    m_osl_shading_system.execute(
        m_osl_shading_context,
        *reinterpret_cast<OSL::ShaderGroup*>(shader_group.osl_shader_group()),
        shading_point.get_osl_shader_globals());
}
コード例 #6
0
void OSLShaderGroupExec::execute_bump(
    const ShaderGroup&              shader_group,
    const ShadingPoint&             shading_point,
    const Vector2f&                 s) const
{
    // Choose between BSSRDF and BSDF.
    if (shader_group.has_subsurface() && s[0] < 0.5f)
    {
        do_execute(
            shader_group,
            shading_point,
            VisibilityFlags::SubsurfaceRay);

        CompositeSubsurfaceClosure c(
            Basis3f(shading_point.get_shading_basis()),
            shading_point.get_osl_shader_globals().Ci,
            m_arena);

        // Pick a shading basis from one of the BSSRDF closures.
        if (c.get_closure_count() > 0)
        {
            const size_t index = c.choose_closure(s[1]);
            shading_point.set_shading_basis(
                Basis3d(c.get_closure_shading_basis(index)));
        }
    }
    else
    {
        do_execute(
            shader_group,
            shading_point,
            VisibilityFlags::CameraRay);

        choose_bsdf_closure_shading_basis(shading_point, s);
    }
}