bgi_dds.h File Reference

Internal CHDOP (Class Hierarchy of Drawing Object Primitives) and DdsScene container for the Drawing Description Data Structure (DDS). More...

#include "bgi_types.h"
#include <cstdint>
#include <memory>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <vector>
#include <glm/glm.hpp>

Include dependency graph for bgi_dds.h:

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Go to the source code of this file.

Data Structures
struct	bgi::DdsArc
struct	bgi::DdsBar
struct	bgi::DdsBar3D
struct	bgi::DdsBox
class	bgi::DdsCamera
	Camera stored in the DDS. More...
struct	bgi::DdsCircle
struct	bgi::DdsCone
struct	bgi::DdsCylinder
struct	bgi::DdsEllipse
struct	bgi::DdsExternalAttributes
struct	bgi::DdsExtrusion
struct	bgi::DdsFillEllipse
struct	bgi::DdsFillPoly
struct	bgi::DdsHeightMap
struct	bgi::DdsImage
struct	bgi::DdsLine
class	bgi::DdsObject
struct	bgi::DdsParamSurface
struct	bgi::DdsPieSlice
struct	bgi::DdsPoint
struct	bgi::DdsPolygon
struct	bgi::DdsRectangle
class	bgi::DdsScene
	In-memory DDS scene graph. More...
struct	bgi::DdsSector
class	bgi::DdsSetDifference
class	bgi::DdsSetIntersection
class	bgi::DdsSetUnion
struct	bgi::DdsSolid3D
	Base for all Phase 4/5/6 solid/surface/extrusion objects. More...
struct	bgi::DdsSphere
struct	bgi::DdsStyle
	Baked rendering state captured at draw-call time. More...
struct	bgi::DdsText
struct	bgi::DdsTorus
class	bgi::DdsTransform
class	bgi::DdsUcs
	UCS stored in the DDS. More...
class	bgi::DdsWorldExtentsObj
	World-extents AABB stored in the DDS. More...

Namespaces
namespace	bgi

Enumerations
enum class	bgi::CoordSpace { bgi::BgiPixel , bgi::World3D , bgi::UcsLocal }
	Indicates the coordinate space in which a drawing object's coordinates are expressed when it was recorded. More...
enum class	bgi::DdsObjectType {   bgi::Camera , bgi::Ucs , bgi::WorldExtentsObj , bgi::Transform ,   bgi::SetUnion , bgi::SetIntersection , bgi::SetDifference , bgi::Point ,   bgi::Line , bgi::Circle , bgi::Arc , bgi::Ellipse ,   bgi::FillEllipse , bgi::PieSlice , bgi::Sector , bgi::Rectangle ,   bgi::Bar , bgi::Bar3D , bgi::Polygon , bgi::FillPoly ,   bgi::Text , bgi::Image , bgi::Box , bgi::Sphere ,   bgi::Cylinder , bgi::Cone , bgi::Torus , bgi::HeightMap ,   bgi::ParamSurface , bgi::Extrusion }
enum class	bgi::ParamSurfaceFormula {   bgi::Sphere = 0 , bgi::Cylinder = 1 , bgi::Torus = 2 , bgi::Saddle = 3 ,   bgi::Mobius = 4 }
enum class	bgi::SolidDrawMode { bgi::Wireframe = 0 , bgi::Flat = 1 , bgi::Smooth = 2 , bgi::Solid = 1 }

Detailed Description

Internal CHDOP (Class Hierarchy of Drawing Object Primitives) and DdsScene container for the Drawing Description Data Structure (DDS).

The DDS is an in-memory, retained-mode scene graph. Every draw call in the library creates a DdsObject derived class in addition to rendering immediately to the pixel buffer (hybrid retained + immediate mode).

Key design properties:

• Sequential access: DdsScene::order vector preserves insertion order.
• O(1) direct access: DdsScene::index unordered_map keys by auto-assigned ID.
• World-space coordinates: ALL drawing objects store floating-point world coordinates. Classic BGI pixel integers are recorded as (x, y, Z=0) with CoordSpace::BgiPixel tag. Through the default pixel-space ortho camera they project identically; through any other camera they reproject correctly.
• DDS is the source of truth for cameras and UCS: BgiState::cameras holds shared_ptr<DdsCamera> — the Camera3D data lives inside the DdsCamera object. Modifying a camera via wxbgi_cam_set_eye() updates the DdsCamera in-place with no sync step.

This header is internal — not part of the public API.