Method render_frame

libraries/lib-engine/src/renderer-pbr.cpp:558–795

}

void pbr_renderer::render_frame(const render_payload & scene)
{
    assert(settings.cameraCount == scene.views.size());

    // @fixme - refactor to make optional
    auto validate_materials = [this, scene]()
    {
        for (const auto & render_comp : scene.render_components)
        {
            // In some workflows, it's useful to hand edit scene files and materials
            // but this often results in a typo, forgotten copy-and-paste, or other
            // types of human-introduced issues. Formerly, we would crash below
            // when trying to sort materials, but this is now an explicit check. 
            if (!render_comp.material->material.get())
            {
                std::cout << "[pbr_renderer] material was not assigned - " << render_comp.material->material.name << std::endl;
                throw std::runtime_error("unassigned material"); // could also possibly assign the default one
            }
        }
    };

    validate_materials();

    cpuProfiler.begin("render_frame");

    // Renderer default state
    glEnable(GL_CULL_FACE);
    glEnable(GL_DEPTH_TEST);
    glEnable(GL_FRAMEBUFFER_SRGB);

    glBindBufferBase(GL_UNIFORM_BUFFER, uniforms::per_scene::binding, perScene);
    glBindBufferBase(GL_UNIFORM_BUFFER, uniforms::per_view::binding, perView);
    glBindBufferBase(GL_UNIFORM_BUFFER, uniforms::per_object::binding, perObject);

    // Update per-scene uniform buffer
    uniforms::per_scene b = {};
    b.time = timer.milliseconds().count() / 1000.f; // expressed in seconds
    b.resolution = float2(settings.renderSize);
    b.invResolution = 1.f / b.resolution;
    b.activePointLights = static_cast<int>(scene.point_lights.size());
    b.sunlightActive = 0;

    if (scene.sunlight)
    {
        b.sunlightActive = 1;
        b.directional_light.color = scene.sunlight->data.color;
        b.directional_light.direction = scene.sunlight->data.direction;
        b.directional_light.amount = scene.sunlight->data.amount;
    }

    assert(scene.point_lights.size() <= uniforms::MAX_POINT_LIGHTS);
    uint32_t lightIdx = 0;
    for (auto & light : scene.point_lights)
    {
        if (!light->enabled) continue;
        b.point_lights[lightIdx] = light->data;
        lightIdx++;
    }