// Showcase how to incrementally log data belonging to the same archetype, and re-use some or all
// of it across frames.

#include <rerun.hpp>

#include <algorithm>
#include <random>

static const char* README = R"(
# Incremental Logging

This example showcases how to incrementally log data belonging to the same archetype, and re-use some or all of it across frames.

It was logged with the following code:
```cpp
std::vector<rerun::Color> colors(10, rerun::Color(255, 0, 0));
std::vector<rerun::Radius> radii(10, rerun::Radius(0.1f));

// Only log colors and radii once.
rec.set_time_sequence("frame_nr", 0);
rec.log("points", colors, radii);

std::default_random_engine gen;
std::uniform_real_distribution<float> dist_pos(-5.0f, 5.0f);

// Then log only the points themselves each frame.
//
// They will automatically re-use the colors and radii logged at the beginning.
for (int i = 0; i < 10; ++i) {
    rec.set_time_sequence("frame_nr", i);

    std::vector<rerun::Position3D> points(10);
    std::generate(points.begin(), points.end(), [&] {
        return rerun::Position3D(dist_pos(gen), dist_pos(gen), dist_pos(gen));
    });
    rec.log("points", rerun::Points3D(points));
}
```

Move the time cursor around, and notice how the colors and radii from frame 0 are still picked up by later frames, while the points themselves keep changing every frame.
)";

int main() {
    const auto rec = rerun::RecordingStream("rerun_example_incremental_logging");
    rec.spawn().exit_on_failure();

    rec.log_static(
        "readme",
        rerun::TextDocument(README).with_media_type(rerun::components::MediaType::markdown())
    );

    // Only log colors and radii once.
    // Logging statically with `RecordingStream::log_static` would also work.
    rec.set_time_sequence("frame_nr", 0);
    rec.log("points", rerun::Points3D().with_colors(rerun::Color(255, 0, 0)).with_radii(0.1f));

    std::default_random_engine gen;
    std::uniform_real_distribution<float> dist_pos(-5.0f, 5.0f);

    // Then log only the points themselves each frame.
    //
    // They will automatically re-use the colors and radii logged at the beginning.
    for (int i = 0; i < 10; ++i) {
        rec.set_time_sequence("frame_nr", i);

        std::vector<rerun::Position3D> points(10);
        std::generate(points.begin(), points.end(), [&] {
            return rerun::Position3D(dist_pos(gen), dist_pos(gen), dist_pos(gen));
        });
        rec.log("points", rerun::Points3D::update_fields().with_positions(points));
    }
}