stars

package

v0.0.0-...-03ab727 Latest Latest Go to latest Published: Nov 27, 2021 License: MIT Imports: 7 Imported by: 0

Details

Valid go.mod file
Redistributable license
Tagged version
Stable version
Learn more about best practices

Repository

github.com/Aoana/go-star-sim

Links

Open Source Insights

Documentation ¶

Index ¶

Constants
Variables
func Move()
func Read(file string, simdata *SimData) error
func StartValues(nstars int) (int error)
func VelocityBarnesHut()
func VelocityBarnesHutGR()
func VelocityExact()
func VelocityExactGR()
func Write(file string) error
type Pixel
type Quad
type SimData
type Star

Constants ¶

View Source

const (
	// Gravitational constant
	G = 0.05
)

Simulation variables dt is set to 1

Variables ¶

View Source

var StarList []*Star

StarList is a global slice of stars

Functions ¶

func Move ¶

func Move()

Move updates position for all stars

func Read ¶

func Read(file string, simdata *SimData) error

Read simdata from file

func StartValues ¶

func StartValues(nstars int) (int error)

StartValues set starting position and velocity Forms a circle with start velocities approx tangential counterclockwise

func VelocityBarnesHut ¶

func VelocityBarnesHut()

VelocityBarnesHut updates position and velocity of all stars Velocity update is based on Barnes Hut approximation

func VelocityBarnesHutGR ¶

func VelocityBarnesHutGR()

VelocityBarnesHutGR updates position and velocity of all stars Velocity update is based on Barnes Hut approximation with go-routines

func VelocityExact ¶

func VelocityExact()

VelocityExact updates position and velocity of all stars Velocity update is based on exact calculation

func VelocityExactGR ¶

func VelocityExactGR()

VelocityExactGR updates position and velocity of all stars Velocity update is based on exact calculation with go routines

func Write ¶

func Write(file string) error

Write simdata to file

Types ¶

type Pixel ¶

type Pixel struct {
	Px []uint16
	Py []uint16
}

Pixel is internal data of pixel Maximum grid size is 2^16 x 2^16

type Quad ¶

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

Quad is a rectangle that contains four smaller rectangles Values are total mass, center of gravity and depth

type SimData ¶

type SimData struct {
	Width    int
	Height   int
	Steps    int
	Model    string
	Velocity float64
	Time     time.Duration
	Summary  string
	Stars    []Pixel
}

SimData contains simulation data Written by star-calc Read by star-sim

var (
	// Data is storage for simulation data
	Data SimData

	// White is ... the color white
	White = color.RGBA{
		byte(255),
		byte(255),
		byte(255),
		byte(0xff),
	}
)

type Star ¶

type Star struct {
	X, Y float64
	// contains filtered or unexported fields
}

Star is a simple position and velocity coordinate

Source Files ¶

View all Source files

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