geodata

Documentation

Overview

Package geodata

These are data files which store information for the game like localization strings, weapons data and globe terrain.

Index

• type Polygon
  • func (p Polygon) SizeOf() int
  • func (p Polygon) String() string
  • func (p *Polygon) Type() PolygonType
• type PolygonType
• type WorldFile
  • func (w *WorldFile) Unpack(buf []byte, order binary.ByteOrder) ([]byte, error)

Types

type Polygon

type Polygon struct {

	// First X coordinate/longitude
	X0 int `struct:"int16"`
	// First Y coordinate/latitude
	Y0 int `struct:"int16"`
	// Second X coordinate/longitude
	X1 int `struct:"int16"`
	// Second Y coordinate/latitude
	Y1 int `struct:"int16"`
	// Third X coordinate/longitude
	X2 int `struct:"int16"`
	// Third Y coordinate/latitude
	Y2 int `struct:"int16"`
	// Fourth* X coordinate/longitude
	X3 int `struct:"int16"`
	// Fourth* Y coordinate/latitude
	Y3 int `struct:"int16"`

	// Terrain Type/Texture	0-12
	Terrain int `struct:"int32"`
}

func (Polygon) SizeOf

func (p Polygon) SizeOf() int

func (Polygon) String

func (p Polygon) String() string

func (*Polygon) Type

func (p *Polygon) Type() PolygonType

type PolygonType

type PolygonType int

const (
	Triangle PolygonType = iota
	QuadrilateralPolygon
)

type WorldFile

type WorldFile struct {
	Polygons []Polygon
}

WorldFile describes the terrain on the geoscape screen using quadrilateral polygons and triangles loaded from GEODATA/WORLD.DAT.

The first 16 bytes of file contain the points for the polygon. 4 sets of 2 short (2-byte) integers, designating the 'X' and 'Y' coordinate (or longitude and latitude respectively, if you prefer). If the last set has an x value of -1 then it is to be rendered as a triangle, otherwise it is a quad.

The last 4 bytes in the record contain the terrain type. This could be a long integer or 2 short integers as the last 2 bytes in each record are 0.

See https://www.ufopaedia.org/index.php/WORLD.DAT for more information.

func (*WorldFile) Unpack

func (w *WorldFile) Unpack(buf []byte, order binary.ByteOrder) ([]byte, error)