Mizu

Contents

Features

Examples

Installation

go get -u github.com/sedyh/mizu

go get -u github.com/sedyh/mizu@experimental

Usage

import"github.com/sedyh/mizu/pkg/engine"

// Position for any entity, if it needstypePosstruct {X,Yfloat64// Just a 2D point}// Velocity for any entity, if it needstypeVelstruct {L,Mfloat64// Also, 2D point}// Radius for any entity, if it needstypeRadstruct {Valuefloat64// Width value}

// Your game objecttypeBallstruct {Pos// Ball positionVel// Ball velocityRad// Ball radius}

// You can go through all entities that have a certain set of// components specifying the requirements in the fields of the systemtypeVelocitystruct {*Pos// Current entity position*Vel// Current entity velocity}// Apply velocity for each entity that has Pos and Velfunc (v*Velocity)Update(w engine.World) {// If they are registered components, they will not be nilv.Pos.X+=v.Vel.Lv.Pos.Y+=v.Vel.M}// When you need many sets of components// in one system, you can use the viewstypeRenderstruct {}// Render one framefunc (r*Render)Draw(w engine.World,screen*ebiten.Image) {// But choose the right entities yourselfview:=w.View(Pos{},Rad{})view.Each(func(entity engine.Entity) {varpos*Posvarrad*Radentity.Get(&pos,&rad)ebitenutil.DrawRect(screen,pos.X-rad.Value/2,pos.Y-rad.Value/2,rad.Value,rad.Value,colornames.Aliceblue,        )    })}

typeGamestruct{}// Main scene, you can use that for settings or main menufunc (g*Game)Setup(w engine.World) {w.AddComponents(Pos{},Vel{},Rad{})w.AddEntities(&Ball{Pos{0,0},Vel{4,4},Rad{10}})w.AddSystems(&Velocity{},&Render{})}

// Provides its own ebiten.Game implementationg:=engine.NewGame(&Game{})iferr:=ebiten.RunGame(g);err!=nil {log.Fatal(err)}

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