BufferGeometry

Representation of mesh, line, or point geometry with GPU-optimized buffers.

This class provides geometry data storage for rendering. It includes vertex positions, face indices, normals, colors, UVs, and custom attributes within buffers.

• Managing indexed and non-indexed geometry
• Computing bounding volumes for culling
• Organizing geometry into render groups
• Applying geometric transformations

Methods

BufferGeometry()

Default constructor: creates an empty geometry

BufferGeometry(const string& name)

Constructor with custom name

name

Human-readable name for the geometry

BufferGeometry* clone() const

Creates a copy of this geometry

void copy(const BufferGeometry& geometry)

Copies properties from another geometry

geometry

Source geometry to copy from

void setAttribute(const string& name, void* data, u32 itemSize, u32 count, u32 format)

Sets a geometry attribute

name	Attribute name (position, normal, color, uv, etc.)
data	Pointer to the attribute data
itemSize	Number of components per vertex
count	Number of vertices
format	GX data format (GX_S16, GX_F32, etc.)

void* getAttribute(const string& name) const

Gets a geometry attribute

name

Attribute name to retrieve

bool hasAttribute(const string& name) const

Checks if an attribute exists

name

Attribute name to check

void deleteAttribute(const string& name)

Deletes an attribute

name

Attribute name to delete

void setIndex(u16* indices, u32 count)

Sets the index buffer for indexed geometry

indices	Pointer to index data
count	Number of indices

u16* getIndex() const

Gets the index buffer

void addGroup(u32 start, u32 count, u32 materialIndex)

Adds a render group to the geometry

start	Starting vertex/index for the group
count	Number of vertices/indices in the group
materialIndex	Material index to use for this group

void clearGroups()

Clears all render groups

void applyMatrix4(const Mtx& matrix)

Applies a 4x4 matrix transformation to the geometry

matrix

Matrix to apply

void center()

Centers the geometry based on bounding box

void translate(f32 x, f32 y, f32 z)

Translates the geometry data

x	Translation along X axis
y	Translation along Y axis
z	Translation along Z axis

void rotateX(f32 radians)

Rotates the geometry around X axis

radians

Rotation angle in radians

void rotateY(f32 radians)

Rotates the geometry around Y axis

radians

Rotation angle in radians

void rotateZ(f32 radians)

Rotates the geometry around Z axis

radians

Rotation angle in radians

void scale(f32 x, f32 y, f32 z)

Scales the geometry data

x	Scale factor for X axis
y	Scale factor for Y axis
z	Scale factor for Z axis

void computeBoundingBox()

Computes the bounding box of the geometry

void computeBoundingSphere()

Computes the bounding sphere of the geometry

void setupGX()

Sets up GX for rendering this geometry

void render()

Renders the geometry using GX

void dispose()

Frees GPU-related resources

Properties

isBufferGeometry	bool	Read
attributes	map<string,void * >	Hashmap of attributes (name
index	u16 *	Index buffer for indexed geometry
indexCount	u32	Number of indices
boundingBox	void *	Bounding box (null = not computed)
boundingSphere	void *	Bounding sphere (null = not computed)
drawRangeStart	u32	Start of draw range
drawRangeCount	u32	Count of vertices/indices to render
groups	vector	Render groups for multiple materials
id	u32	Unique identifier
name	string	Human
uuid	string	UUID string
userData	void *	Custom user data
vertexCount	u32	Total number of vertices
primitiveType	u32	GX primitive type (GX_QUADS 0x80, GX_TRIANGLES 0x90, etc.)
isIndexed	bool	Whether geometry uses indices