common

package
v0.0.0-...-28575ab Latest Latest
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 Go to latest Published: Feb 11, 2024 License: MIT Imports: 7 Imported by: 0

Documentation

Overview

Package common provides types and functions that are used by multiple demos.

Index

Constants

View Source 
const DegToRad = math.Pi / 180.0

DegToRad conversion factor.

View Source 
const RadToDeg = 180.0 / math.Pi

RadToDeg conversion factor.

Variables

This section is empty.

Functions

func AbsInt 

func AbsInt(v int) int

AbsInt calculates the absolute value og an integer.

func Clamp 

func Clamp(v, low, high float64) float64

Clamp clamps to [low, high].

func Clamp32 

func Clamp32(v, low, high float32) float32

Clamp32 clamps to [low, high].

func ClampInt 

func ClampInt(v, low, high int) int

ClampInt clamps to [low, high].

func Distance 

func Distance(x1, y1, x2, y2 float64) float64

Distance calculates the distance between two points.

func DistanceSq 

func DistanceSq(x1, y1, x2, y2 float64) float64

DistanceSq calculates the squared distance between two points.

func Norm 

func Norm(dx, dy float64) (float64, float64, float64)

Norm normalizes a vector. The third return value is the original vector's length.

func NormAngle 

func NormAngle(angle float64) float64

NormAngle brings an angle into range [0, 2*PI).

func NormAngle32 

func NormAngle32(angle float32) float32

NormAngle32 brings an angle into range [0, 2*PI).

func RandBetweenUIn8 

func RandBetweenUIn8(lim1, lim2 uint8) uint8

RandBetweenUIn8 returns a random uint8 between the given limits, both inclusive

func Rotate 

func Rotate(x, y, angle float64) (float64, float64)

Rotate rotates a vector.

func SelectRoulette 

func SelectRoulette(probs []float64) (int, bool)

SelectRoulette performs roulette selection

func SubtractHeadings 

func SubtractHeadings(h1, h2 float64) float64

SubtractHeadings calculates the rotation required to come from h2 to h1.

Types

type EbitenImage 

type EbitenImage struct {
	Image  *ebiten.Image
	Width  int
	Height int
}

EbitenImage resource for drawing. Will be shown on an HTML5 canvas.

type Game 

type Game struct {
	Model  *model.Model
	Screen EbitenImage
	Mouse  Mouse
	// contains filtered or unexported fields
}

Game container

func NewGame 

func NewGame(mod *model.Model, width, height int) Game

NewGame returns a new game

func (*Game) Draw 

func (g *Game) Draw(screen *ebiten.Image)

Draw the game.

func (*Game) Initialize 

func (g *Game) Initialize()

Initialize the game.

func (*Game) IsMouseInside 

func (g *Game) IsMouseInside() bool

IsMouseInside returns whether the mouse is inside the game canvas.

func (*Game) Layout 

func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int)

Layout the game.

func (*Game) Run 

func (g *Game) Run() error

Run the game.

func (*Game) Update 

func (g *Game) Update() error

Update the game.

type Grid 

type Grid[T any] struct {
	// contains filtered or unexported fields
}

Grid data structure for 2D uniform grids.

func NewGrid 

func NewGrid[T any](width, height int, cellsize ...float64) Grid[T]

NewGrid returns a new Grid.

func NewGridExtent 

func NewGridExtent[T any](width, height float64, cellsize ...float64) Grid[T]

NewGridExtent returns a new Grid with the given global extent.

func (*Grid[T]) CellCenter 

func (g *Grid[T]) CellCenter(x, y int) (float64, float64)

CellCenter returns the world coordinates of the center of the given cell.

func (*Grid[T]) Cellsize 

func (g *Grid[T]) Cellsize() float64

Cell size of the Grid.

func (*Grid[T]) Contains 

func (g *Grid[T]) Contains(x, y int) bool

Contains returns whether the grid contains the given cell.

func (*Grid[T]) Fill 

func (g *Grid[T]) Fill(value T)

Fill the grid with a value.

func (*Grid[T]) Get 

func (g *Grid[T]) Get(x, y int) T

Get a value from the Grid.

func (*Grid[T]) GetPointer 

func (g *Grid[T]) GetPointer(x, y int) *T

Get a pointer to a value from the Grid.

func (*Grid[T]) Height 

func (g *Grid[T]) Height() int

Height of the Grid.

func (*Grid[T]) IsInBounds 

func (g *Grid[T]) IsInBounds(x, y float64) bool

Contains returns whether the grid contains the given world coordinates.

func (*Grid[T]) Set 

func (g *Grid[T]) Set(x, y int, value T)

Set a value in the grid.

func (*Grid[T]) ToCell 

func (g *Grid[T]) ToCell(x, y float64) (int, int)

ToCell converts world coordinates to integer patch coordinates.

func (*Grid[T]) ToCellCenter 

func (g *Grid[T]) ToCellCenter(x, y float64) (float64, float64)

ToCellCenter returns the world coordinates of the center of the cell the given point is in.

func (*Grid[T]) Width 

func (g *Grid[T]) Width() int

Width of the Grid.

type Image 

type Image struct {
	Image  *image.RGBA
	Width  int
	Height int
}

Image resource for drawing. Will be shown on an HTML5 canvas.

type Mouse 

type Mouse struct {
	image.Point
	IsInside bool
}

Mouse resource for events.

type SimulationSpeed 

type SimulationSpeed struct {
	Exponent int
}

SimulationSpeed resource. The Game will adapt the simulation speed if the resource is present.

type Vec2f 

type Vec2f struct {
	X, Y float64
}

Vec2f is a 2d float vector

func (*Vec2f) Add 

func (v *Vec2f) Add(other Vec2f)

Add adds a vector in-place

func (Vec2f) Angle 

func (v Vec2f) Angle() float64

Len returns the length of the vector

func (*Vec2f) Copy 

func (v *Vec2f) Copy() Vec2f

Copy copies the vector

func (Vec2f) Distance 

func (v Vec2f) Distance(other Vec2f) float64

Distance to another vector

func (Vec2f) DistanceSq 

func (v Vec2f) DistanceSq(other Vec2f) float64

DistanceSq to another vector

func (*Vec2f) Div 

func (v *Vec2f) Div(factor float64)

Div divides a vector in-place

func (Vec2f) Get 

func (v Vec2f) Get(dim int) float64

Get returns the coordinate value for a specific dimension

func (*Vec2f) IsZero 

func (v *Vec2f) IsZero() bool

IsZero adds a vector in-place

func (Vec2f) Len 

func (v Vec2f) Len() float64

Len returns the length of the vector

func (Vec2f) LenSq 

func (v Vec2f) LenSq() float64

LenSq returns the squared length of the vector

func (*Vec2f) Mul 

func (v *Vec2f) Mul(factor float64)

Mul multiplies a vector in-place

func (*Vec2f) Norm 

func (v *Vec2f) Norm(length float64) float64

Norm normalizes a vector to the given length and returns the original length.

func (*Vec2f) Sub 

func (v *Vec2f) Sub(other Vec2f)

Sub subtracts a vector in-place

Source Files

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