glossary

package
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 Go to latest Published: Jun 22, 2021 License: MIT, MIT Imports: 20 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func AnchorTxt 

func AnchorTxt(txt *text.Text, pos pixel.Vec, anchorX AnchorX, anchorY AnchorY, desc string)

AnchorTxt positions a text.Text label with an anchor alignment.

func AtlasASCII 

func AtlasASCII() *text.Atlas

AtlasASCII returns an atlas which allows you to draw only ASCII characters. Atlas is a set of generated textures for glyphs in a specific font.

func Direction 

func Direction(from, to pixel.Vec) (dirVecNormalized pixel.Vec)

Direction returns a direction as a normalized vector. This vector always has a length of 1.

func ItfsToStrs 

func ItfsToStrs(itfs []interface{}) (strs []string)

ItfsToStrs converts []interface{} to []string.

func LoadPicture 

func LoadPicture(_bytes []byte) (pixel.Picture, error)

LoadPicture decodes an image that has been encoded in a registered format. (png, jpg, etc.) Format registration is typically done by an init function in the codec-specific package. (with underscore import)

func LoadPictureFromFile 

func LoadPictureFromFile(path string) (pixel.Picture, error)

LoadPictureFromFile decodes an image that has been encoded in a registered format. (png, jpg, etc.) Format registration is typically done by an init function in the codec-specific package. (with underscore import)

func LoadTrueTypeFont 

func LoadTrueTypeFont(bytes []byte, size float64) (font.Face, error)

LoadTrueTypeFont creates and returns a font face.

func LoadTrueTypeFontFromFile 

func LoadTrueTypeFontFromFile(path string, size float64) (font.Face, error)

LoadTrueTypeFontFromFile creates and returns a font face.

func NewAtlas 

func NewAtlas(nameAssetTTF string, size float64, runeSet []rune) *text.Atlas

NewAtlas newly loads and prepares a set of images of characters or symbols to be drawn. Arg runeSet would be set to nil if non-ASCII characters are not in use.

func NewSprite 

func NewSprite(nameAsset string) *pixel.Sprite

NewSprite converts an asset (resource) into a sprite. Returns nil if there is an error. AssetNames() or AssetDir() might be helpful when utilizing this function.

func RandomNiceColor 

func RandomNiceColor() pixel.RGBA

RandomNiceColor from Platformer. Is not completely random without rand.Seed().

func VerticesOfRect 

func VerticesOfRect(r pixel.Rect) []pixel.Vec

VerticesOfRect returns 4 vertices of a rectangle in a form of a slice of vectors.

Types

type Aim 

type Aim struct {
	// contains filtered or unexported fields
}

Aim for experiments.

func (Aim) Draw 

func (aim Aim) Draw(t pixel.Target)

Draw aim as a dot.

type AnchorX 

type AnchorX int

AnchorX - Left, Center, Right 

const (
	Left AnchorX = 1 + iota
	Center
	Right
)

enum AnchorX

type AnchorY 

type AnchorY int

AnchorY - Top, Middle, Bottom 

const (
	Top AnchorY = 1 + iota
	Middle
	Bottom
)

enum AnchorY

type Camera 

type Camera struct {
	// contains filtered or unexported fields
}

Camera is a tool to get the screen center to be able to follow a certain point on a plane.

func NewCamera 

func NewCamera(_pos pixel.Vec, _screenBound pixel.Rect) *Camera

NewCamera is a constructor.

func (Camera) Angle 

func (camera Camera) Angle() float64

Angle returns the angle of a camera in radians.

func (*Camera) Move 

func (camera *Camera) Move(distance pixel.Vec)

Move camera a specified distance.

func (*Camera) MoveTo 

func (camera *Camera) MoveTo(posAim pixel.Vec)

MoveTo () moves a camera to a point on a plane.

func (*Camera) Rotate 

func (camera *Camera) Rotate(degree float64)

Rotate a camera by certain degrees. + ) Counterclockwise - ) Clockwise

func (*Camera) SetScreenBound 

func (camera *Camera) SetScreenBound(screenBound pixel.Rect)

SetScreenBound of a camera.

func (Camera) Transform 

func (camera Camera) Transform() pixel.Matrix

Transform returns a transformation matrix of a camera. Use Transform().Project() to convert a game position to a screen position. To do the inverse operation, it is recommended to use Camera#Unproject() rather than Transform().Unproject()

func (Camera) Unproject 

func (camera Camera) Unproject(screenPosition pixel.Vec) (gamePosition pixel.Vec)

Unproject converts a screen position to a game position. This method is a replacement of Transform().Unproject() which might return a bit off position.

func (*Camera) Update 

func (camera *Camera) Update(dt float64)

Update a camera's current physical state (physics) by calculating coordinates X, Y, Z and its angle after delta time in seconds.

func (Camera) XY 

func (camera Camera) XY() pixel.Vec

XY returns the X and Y of a camera as a vector.

func (Camera) XYZ 

func (camera Camera) XYZ() (float64, float64, float64)

XYZ returns a camera's coordinates value X, Y, and Z in a current physical state.

func (Camera) Z 

func (camera Camera) Z() float64

Z returns the zoom depth of a camera.

func (*Camera) Zoom 

func (camera *Camera) Zoom(byLevel float64)

Zoom in and out with a camera by certain levels. + ) Zoom in - ) Zoom out

type DtWatch 

type DtWatch struct {
	// contains filtered or unexported fields
}

DtWatch is a delta time checker.

func (*DtWatch) Dt 

func (watch *DtWatch) Dt() (deltaTimeInSeconds float64)

Dt since last Dt() or DtNano(). .Start() must be called prior to calling this method.

func (*DtWatch) DtNano 

func (watch *DtWatch) DtNano() (deltaTimeInNanosec time.Duration)

DtNano since last Dt() or DtNano(). It returns a time instance with nanosecond precision. .Start() must be called prior to calling this method.

func (DtWatch) DtSinceStart 

func (watch DtWatch) DtSinceStart() (deltaTimeInSeconds float64)

DtSinceStart is dt since last Start(). .Start() must be called prior to calling this method.

func (DtWatch) GetTimeStarted 

func (watch DtWatch) GetTimeStarted() time.Time

GetTimeStarted gets the time it started. .Start() must be called prior to calling this method.

func (DtWatch) IsStarted 

func (watch DtWatch) IsStarted() bool

IsStarted () determines whether it has started or not. .Start() is <not> required in order to call this method.

func (*DtWatch) SetTimeStarted 

func (watch *DtWatch) SetTimeStarted(t time.Time)

SetTimeStarted sets the time it started. .Start() must be called prior to calling this method.

func (*DtWatch) Start 

func (watch *DtWatch) Start()

Start () is required in order to call other methods of a DtWatch.

type Explosions 

type Explosions struct {
	// contains filtered or unexported fields
}

Explosions is an imdraw and a manager of all particles.

func NewExplosions 

func NewExplosions(width, height float64, colors []color.Color, precision int) *Explosions

NewExplosions is a constructor. The 3rd argument colors can be nil. Then it will use its default value of a color set.

func (*Explosions) Draw 

func (e *Explosions) Draw(t pixel.Target)

Draw guarantees the thread safety, though it's not a necessary condition. It is quite dangerous to access this struct's member (imdraw) directly from outside these methods.

func (*Explosions) ExplodeAt 

func (e *Explosions) ExplodeAt(pos, vel pixel.Vec)

ExplodeAt generates an explosion at given point.

func (Explosions) IsExploding 

func (e Explosions) IsExploding() bool

IsExploding determines whether this Explosions is about to be updated or not. Pass lock by value warning from (e Explosions) should be ignored, because an Explosions here is just passed as a read only argument.

func (*Explosions) SetBound 

func (e *Explosions) SetBound(width, height float64)

SetBound of particles. All particles bounce when they meet this bound.

func (*Explosions) Update 

func (e *Explosions) Update(dt float64)

Update animates an Explosions. An Explosions is drawn on an imdraw.

type FPSWatch 

type FPSWatch struct {
	// contains filtered or unexported fields
}

FPSWatch measures the real-time frame rates and displays it on a target canvas.

func NewFPSWatch 

func NewFPSWatch(
	additionalCaption string, _pos pixel.Vec,
	_anchorY AnchorY, _anchorX AnchorX,
	_colorBg, _colorTxt color.Color,
) (watch *FPSWatch)

NewFPSWatch is a constructor.

func NewFPSWatchSimple 

func NewFPSWatchSimple(_pos pixel.Vec, _anchorY AnchorY, _anchorX AnchorX) *FPSWatch

NewFPSWatchSimple is a constructor.

func (*FPSWatch) Draw 

func (watch *FPSWatch) Draw(t pixel.Target)

Draw FPSWatch.

func (FPSWatch) GetFPS 

func (watch FPSWatch) GetFPS() int

GetFPS returns the most recent FPS recorded. A non-ptr FPSWatch as a read only argument passes lock by value within itself but that seems totally fine.

func (*FPSWatch) Poll 

func (watch *FPSWatch) Poll()

Poll () should be called only once and in every single frame. (Obligatory) This is an extended behavior of Update() like funcs.

func (*FPSWatch) SetPos 

func (watch *FPSWatch) SetPos(pos pixel.Vec, anchorY AnchorY, anchorX AnchorX)

SetPos to a position in screen coords.

func (*FPSWatch) Start 

func (watch *FPSWatch) Start()

Start ticking every second.

type Galaxy 

type Galaxy struct {
	// contains filtered or unexported fields
}

Galaxy is an imd of stars.

func NewGalaxy 

func NewGalaxy(_width, _height, _speed float64) *Galaxy

NewGalaxy is a constructor.

func (*Galaxy) Draw 

func (galaxy *Galaxy) Draw(t pixel.Target)

Draw guarantees the thread safety, though it's not a necessary condition. It is quite dangerous to access this struct's member (imdraw) directly from outside these methods.

func (*Galaxy) SetSpeed 

func (galaxy *Galaxy) SetSpeed(_speed float64)

SetSpeed is a setter.

func (Galaxy) Speed 

func (galaxy Galaxy) Speed() float64

Speed is a getter. Pass lock by value warning from (galaxy Galaxy) should be ignored, because a galaxy here is just passed as a read only argument.

func (*Galaxy) Update 

func (galaxy *Galaxy) Update(dt float64)

Update animates a galaxy.

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