$#include "Drawable.h"

static const unsigned DRAWABLE_GEOMETRY;
static const unsigned DRAWABLE_LIGHT;
static const unsigned DRAWABLE_ZONE;
static const unsigned DRAWABLE_ANY;
static const unsigned DEFAULT_VIEWMASK;
static const unsigned DEFAULT_LIGHTMASK;
static const unsigned DEFAULT_SHADOWMASK;
static const unsigned DEFAULT_ZONEMASK;
static const int DRAWABLES_PER_WORK_ITEM;
static const int MAX_VERTEX_LIGHTS;
static const float ANIMATION_LOD_BASESCALE;

/// Base class for visible components.
class Drawable : public Component
{
public:
    /// Set draw distance.
    void SetDrawDistance(float distance);
    /// Set shadow draw distance.
    void SetShadowDistance(float distance);
    /// Set LOD bias.
    void SetLodBias(float bias);
    /// Set view mask. Is and'ed with camera's view mask to see if the object should be rendered.
    void SetViewMask(unsigned mask);
    /// Set light mask. Is and'ed with light's and zone's light mask to see if the object should be lit.
    void SetLightMask(unsigned mask);
    /// Set shadow mask. Is and'ed with light's light mask and zone's shadow mask to see if the object should be rendered to a shadow map.
    void SetShadowMask(unsigned mask);
    /// Set zone mask. Is and'ed with zone's zone mask to see if the object should belong to the zone.
    void SetZoneMask(unsigned mask);
    /// Set maximum number of per-pixel lights. Default 0 is unlimited.
    void SetMaxLights(unsigned num);
    /// Set shadowcaster flag.
    void SetCastShadows(bool enable);
    /// Set occlusion flag.
    void SetOccluder(bool enable);
    /// Set occludee flag.
    void SetOccludee(bool enable);
    /// Mark for update before octree reinsertion.
    void MarkForUpdate();
    
    /// Return world-space bounding box.
    const BoundingBox& GetWorldBoundingBox();
    /// Return drawable flags.
    unsigned char GetDrawableFlags() const { return drawableFlags_; }
    /// Return draw distance.
    float GetDrawDistance() const { return drawDistance_; }
    /// Return shadow draw distance.
    float GetShadowDistance() const { return shadowDistance_; }
    /// Return LOD bias.
    float GetLodBias() const { return lodBias_; }
    /// Return view mask.
    unsigned GetViewMask() const { return viewMask_; }
    /// Return light mask.
    unsigned GetLightMask() const { return lightMask_; }
    /// Return shadow mask.
    unsigned GetShadowMask() const { return shadowMask_; }
    /// Return zone mask.
    unsigned GetZoneMask() const { return zoneMask_; }
    /// Return maximum number of per-pixel lights.
    unsigned GetMaxLights() const { return maxLights_; }
    /// Return shadowcaster flag.
    bool GetCastShadows() const { return castShadows_; }
    /// Return occluder flag.
    bool IsOccluder() const { return occluder_; }
    /// Return occludee flag.
    bool IsOccludee() const { return occludee_; }
    
    /// Set new zone.
    void SetZone(Zone* zone, bool temporary = false);
    /// Set sorting value.
    void SetSortValue(float value);
    /// Set view-space depth bounds.
    void SetMinMaxZ(float minZ, float maxZ);
    /// Mark in view (either the main camera, or a shadow camera view) this frame.
    void MarkInView(const FrameInfo& frame, bool mainView = true);
    /// Clear lights and base pass flags for a new frame.
    void ClearLights();
    /// Add a per-pixel light.
    void AddLight(Light* light);
    /// Add a per-vertex light.
    void AddVertexLight(Light* light);
    /// Sort and limit per-pixel lights to maximum allowed. Convert extra lights into vertex lights.
    void LimitLights();
    /// Sort and limit per-vertex lights to maximum allowed.
    void LimitVertexLights();
    /// Set base pass flag for a batch.
    void SetBasePass(unsigned batchIndex) { basePassFlags_ |= (1 << batchIndex); }
    /// Return octree octant.
    Octant* GetOctant() const { return octant_; }
    /// Return current zone.
    Zone* GetZone() const;
    /// Return previous zone.
    Zone* GetLastZone() const;
    /// Return if zone assignment needs re-evaluation.
    bool IsZoneDirty() const { return zoneDirty_; }
    /// Return distance from camera.
    float GetDistance() const { return distance_; }
    /// Return LOD scaled distance from camera.
    float GetLodDistance() const { return lodDistance_; }
    /// Return sorting value.
    float GetSortValue() const { return sortValue_; }
    /// Return whether is in view this frame.
    bool IsInView(unsigned frameNumber) const { return viewFrameNumber_ == frameNumber; }
    /// Return whether is visible in a specific view this frame.
    bool IsInView(const FrameInfo& frame, bool mainView = true) const { return viewFrameNumber_ == frame.frameNumber_ && viewFrame_ == &frame && (!mainView || viewCamera_ == frame.camera_); }
    /// Return whether has a base pass.
    bool HasBasePass(unsigned batchIndex) const { return (basePassFlags_ & (1 << batchIndex)) != 0; }
    /// Return the first added per-pixel light.
    Light* GetFirstLight() const { return firstLight_; }
    /// Return the minimum view-space depth.
    float GetMinZ() const { return minZ_; }
    /// Return the maximum view-space depth.
    float GetMaxZ() const { return maxZ_; }
};