projection

Documentation

Overview

Package projection provides the projection interface and implementations.

Index

• func GetOffsetCenter(screenWidth, screenHeight int, bounds image.Rectangle) image.Point
• func GetScale(screenWidth, screenHeight int, bounds image.Rectangle) int
• type Projection
  • func NewDirect() Projection
  • func NewIsomorphic(scale int) Projection

Functions

func GetOffsetCenter

func GetOffsetCenter(screenWidth, screenHeight int, bounds image.Rectangle) image.Point

GetOffsetCenter returns the offset to move `bounds` to the center of the screen.

func GetScale

func GetScale(screenWidth, screenHeight int, bounds image.Rectangle) int

GetScale returns the scale factor to fit bounds in the given screen size.

Types

type Projection

type Projection interface {
	Project(math3.Vec) math3.Vec

	SetOffset(math3.Vec)

	GetScale() float64
	SetScale(float64)

	GetAngle() math3.Vec
	SetAngle(math3.Vec)
}

Projection defines how to project the given 3d point.

func NewDirect

func NewDirect() Projection

NewDirect creates the default projection without direct changes.

func NewIsomorphic

func NewIsomorphic(scale int) Projection

NewIsomorphic creates an isomorphic projection with the given scale.