g

package
v0.1.2-0...-b65944d Latest Latest
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 Go to latest Published: Jan 19, 2021 License: MIT, Unlicense Imports: 13 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	Pi  = math.Pi
	Tau = Pi * 2
	Phi = math.Phi
)

Variables

View Source 
var (
	Red   = Color{0xFF, 0x00, 0x00, 0xFF}
	Green = Color{0x00, 0xFF, 0x00, 0xFF}
	Blue  = Color{0x00, 0x00, 0xFF, 0xFF}
)
View Source 
var Zero2 = V2{}

Functions

func Abs 

func Abs(a float32) float32

func ApplyDeadZone 

func ApplyDeadZone(v float32, deadZone float32) float32

func Atan 

func Atan(v float32) float32

func Atan2 

func Atan2(y, x float32) float32

func Clamp 

func Clamp(a, low, high float32) float32

Clamp clamps value to low..high

func Clamp01 

func Clamp01(a float32) float32

Clamp01 clamps value to 0..1

func ClampUnit 

func ClampUnit(a float32) float32

ClampUnit clamps value to -1..1 TODO: what's the conventional name for this?

func Cos 

func Cos(v float32) float32

func DegToRad 

func DegToRad(deg float32) float32

func EnforceInside 

func EnforceInside(pos, vel *V2, bounds Rect, dampening float32)

func Lerp 

func Lerp(a, b, p float32) float32

func LerpClamp 

func LerpClamp(a, b, p float32) float32

func Max 

func Max(a, b float32) float32

func Min 

func Min(a, b float32) float32

func MinMax 

func MinMax(a, b float32) (float32, float32)

func Mod 

func Mod(x, y float32) float32

func Pow 

func Pow(v, e float32) float32

func RadToDeg 

func RadToDeg(rad float32) float32

func RandomBetween 

func RandomBetween(a, b float32) float32

func Sat8 

func Sat8(v float32) uint8

func Sin 

func Sin(v float32) float32

func Sqr 

func Sqr(v float32) float32

Sqr returns the square of v

func Sqrt 

func Sqrt(v float32) float32

Sqrt returns the square root of v

Types

type Color 

type Color struct{ R, G, B, A uint8 }

func ColorFloat 

func ColorFloat(r, g, b, a float32) Color

func ColorHSL 

func ColorHSL(h, s, l float32) Color

func ColorHSLA 

func ColorHSLA(h, s, l, a float32) Color

func ColorHex 

func ColorHex(hex uint32) Color

func LerpColor 

func LerpColor(a, b Color, p float32) Color

func (Color) Float 

func (c Color) Float() (r, g, b, a float32)

func (Color) RGBA 

func (c Color) RGBA() (r, g, b, a uint8)

func (Color) WithAlpha 

func (c Color) WithAlpha(a uint8) Color

type Font 

type Font struct {
	Texture      *Texture
	Glyphs       string
	GlyphsPerRow int
	GlyphSize    V2
}

func (*Font) Draw 

func (font *Font) Draw(text string, position V2, glyphHeight float32)

func (*Font) DrawColored 

func (font *Font) DrawColored(text string, position V2, glyphHeight float32, color Color)

func (*Font) DrawLines 

func (font *Font) DrawLines(lines []string, position V2, glyphHeight, lineHeight float32)

func (*Font) Width 

func (font *Font) Width(text string, glyphHeight float32) float32

type Radian 

type Radian float32

type Rect 

type Rect struct{ Min, Max V2 }

func NewCircleRect 

func NewCircleRect(r float32) Rect

func NewRect 

func NewRect(w, h float32) Rect

func (Rect) Contains 

func (r Rect) Contains(p V2) bool

func (Rect) Offset 

func (r Rect) Offset(delta V2) Rect

func (Rect) ScaleInv 

func (r Rect) ScaleInv(v V2) Rect

func (Rect) Size 

func (r Rect) Size() V2

type Texture 

type Texture struct {
	Path string

	Repeat bool
	RGBA   *image.RGBA
	Size   V2
	ID     uint32
	// contains filtered or unexported fields
}

func (*Texture) Delete 

func (tex *Texture) Delete()

func (*Texture) Draw 

func (tex *Texture) Draw(dst Rect)

func (*Texture) DrawColored 

func (tex *Texture) DrawColored(dst Rect, color Color)

func (*Texture) DrawSub 

func (tex *Texture) DrawSub(dst Rect, src Rect)

func (*Texture) DrawSubColored 

func (tex *Texture) DrawSubColored(dst Rect, src Rect, color Color)

func (*Texture) Line 

func (tex *Texture) Line(from, to V2, width float32)

func (*Texture) LineColored 

func (tex *Texture) LineColored(from, to V2, width float32, color Color)

func (*Texture) Reload 

func (tex *Texture) Reload()

func (*Texture) Upload 

func (tex *Texture) Upload()

type V2 

type V2 struct{ X, Y float32 }

func ClampLength 

func ClampLength(a V2, maxsize float32) V2

func RandomV2 

func RandomV2(r Rect) V2

func RandomV2Circle 

func RandomV2Circle(radius float32) V2

func (V2) Add 

func (a V2) Add(b V2) V2

Add adds two vectors and returns the result

func (V2) AddScale 

func (a V2) AddScale(b V2, s float32) V2

func (V2) Angle 

func (a V2) Angle() float32

func (V2) Cross 

func (a V2) Cross(b V2) float32

Cross product of a and b

func (V2) Distance 

func (a V2) Distance(b V2) float32

Distance returns the distance to vector b

func (V2) Distance2 

func (a V2) Distance2(b V2) float32

Distance2 returns the squared distance to vector b

func (V2) Dot 

func (a V2) Dot(b V2) float32

Dot calculates the dot product

func (V2) Length 

func (a V2) Length() float32

Length returns the length of the vector

func (V2) Length2 

func (a V2) Length2() float32

Length2 returns the squared length of the vector

func (V2) NearZero 

func (a V2) NearZero() bool

func (V2) Negate 

func (a V2) Negate() V2

func (V2) Normalize 

func (a V2) Normalize() V2

func (V2) Rotate 

func (a V2) Rotate(angle float32) V2

func (V2) Rotate180 

func (a V2) Rotate180() V2

func (V2) Rotate90 

func (a V2) Rotate90() V2

func (V2) Rotate90c 

func (a V2) Rotate90c() V2

func (V2) Scale 

func (a V2) Scale(s float32) V2

Scale scales each component and returns the result

func (V2) Sub 

func (a V2) Sub(b V2) V2

Sub subtracts two vectors and returns the result

func (V2) XY 

func (a V2) XY() (x, y float32)

XY returns both components

func (V2) XYZ 

func (a V2) XYZ() (x, y, z float32)

Source Files

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