Class Ifc4::IfcTextureVertex

Nested Relationships

This class is a nested type of Struct Ifc4.

Inheritance Relationships

Base Type

Class Documentation

class Ifc4::IfcTextureVertex : public Ifc4::IfcPresentationItem

An IfcTextureVertex is a list of 2 (S, T) texture coordinates.

The following additional definitions from ISO 19775 apply:

Each vertex-based geometry node uses a set of 2D texture coordinates that map textures to vertices. Texture map values ( ImageTexture, PixelTexture) range from [0.0, 1.0] along the S-axis and T-axis. However, texture coordinate values may be in the range (-∞,∞). Texture coordinates identify a location (and thus a colour value) in the texture map. The horizontal coordinate S is specified first, followed by the vertical coordinate T. If the texture map is repeated in a given direction (S-axis or T-axis), a texture coordinate C (s or t) is mapped into a texture map that has N pixels in the given direction as follows:

Texture map location = (C - floor(C)) × N

If the texture map is not repeated, the texture coordinates are clamped to the 0.0 to 1.0 range as follows:

Texture map location = N, if C > 1.0, = 0.0, if C < 0.0, = C × N, if 0.0 ≤ C ≤ 1.0.

Texture coordinates may be transformed (scaled, rotated, translated) by supplying a TextureTransform as a component of the texture’s definition.

HISTORY: New entity in IFC 2x2.

Public Types

typedef IfcTemplatedEntityList<IfcTextureVertex> list

Public Functions

std::vector<double> Coordinates() const

The first coordinate[1] is the S, the second coordinate[2] is the T parameter value.

void setCoordinates(std::vector<double> v)
const IfcParse::entity &declaration() const
IfcTextureVertex(IfcEntityInstanceData *e)
IfcTextureVertex(std::vector<double> v1_Coordinates)

Public Static Functions

const IfcParse::entity &Class()