GatherOutput.h

//
//  GatherOutput.h
//  avara3d
//
//  Created by Morgan Davis on 1/3/26.
//  Copyright © 2026 Morgan K Davis. All rights reserved.
//
 
#ifndef AVARA3D_RENDER_GATHEROUTPUT_H
#define AVARA3D_RENDER_GATHEROUTPUT_H
 
#include <memory>
#include <optional>
#include <vector>
 
#include "a3d/Math.h"
#include "a3d/mesh/AABB.h"
#include "a3d/mesh/Line.h"
#include "a3d/visual/Ground.h"
 
namespace a3d {
 
class Line;
class Material;
class Mesh;
class MeshElement;
class Node;
class PhysicsWorld;
class Scene;
 
// [Internal Types]
 
enum class RenderStyle : uint8_t {
    Normal,
    Wireframe,
    WireframeOverlay
};
 
struct RenderItem {
    Mesh*        mesh         = nullptr; //probably remove after handle conversion
    VertexLayout layout       = VertexLayout::None;
    uint32_t     elementIndex = 0;
    MeshElement* element      = nullptr; // TODO: remove
    Material*    material     = nullptr;
    math::vec4   tint         = math::vec4(0.0f); // RGB color, a blend strength
    RenderStyle  style        = RenderStyle::Normal;
    math::mat4   model        = math::mat4(1.0f);
    AABB         aabb         = AABB::Zero(); // world space
    float        depth        = 0.0f; // view-space depth for later
    int          renderOrder  = 0;
    bool         transparent  = false; // for later -- always false in BlendFunction
};
 
struct GatherOutput {
    std::vector<RenderItem>   renderItems           = {};
    const Scene*              scene                 = nullptr; // debug AABB
    std::shared_ptr<Material> backgroundMaterial    = nullptr;
    math::quat                backgroundOrientation = math::quat(1.0f);
    std::optional<Ground>     ground                = {};
    std::vector<Node*>        lightNodes            = {};
    std::vector<Line>         debugLines            = {};
};
 
} // namespace a3d
 
#endif // AVARA3D_RENDER_GATHEROUTPUT_H