namespace AcDream.App.Rendering.Wb;

/// <summary>
/// Phase A8 (2026-05-28): WB's RenderPass enum, extracted verbatim from
/// <c>references/WorldBuilder/Chorizite.OpenGLSDLBackend/Lib/RenderPass.cs:1-22</c>.
///
/// Renamed to <c>WbRenderPass</c> to keep the WB-faithful name distinct
/// from any future acdream-side RenderPass with different semantics.
/// Consumed by <see cref="EnvCellRenderer"/> and matches the
/// <c>uRenderPass</c> uniform in the modern mesh shaders.
/// </summary>
public enum WbRenderPass
{
    /// <summary>
    /// The opaque pass. Only non-transparent objects are rendered.
    /// </summary>
    Opaque = 0,

    /// <summary>
    /// The transparent pass. Only transparent objects are rendered,
    /// usually after the opaque pass.
    /// </summary>
    Transparent = 1,

    /// <summary>
    /// A single-pass render that includes both opaque and (sometimes)
    /// transparent objects, or for special cases like skyboxes and
    /// certain UI elements.
    /// </summary>
    SinglePass = 2,
}