Restructure the app to be scene-based
This commit is contained in:
parent
a4fc6ec231
commit
ede3d58e1d
107
doodle.go
107
doodle.go
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@ -33,8 +33,7 @@ type Doodle struct {
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width int32
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height int32
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nextSecond time.Time
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canvas Grid
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scene Scene
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window *sdl.Window
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renderer *sdl.Renderer
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@ -49,9 +48,6 @@ func New(debug bool) *Doodle {
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running: true,
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width: 800,
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height: 600,
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canvas: Grid{},
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nextSecond: time.Now().Add(1 * time.Second),
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}
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if !debug {
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@ -102,13 +98,25 @@ func (d *Doodle) Run() error {
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render.Renderer = renderer
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defer renderer.Destroy()
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// Set up the default scene.
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if d.scene == nil {
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d.Goto(&EditorScene{})
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}
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log.Info("Enter Main Loop")
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for d.running {
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d.ticks++
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// Poll for events.
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_, err := d.events.Poll(d.ticks)
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if err != nil {
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log.Error("event poll error: %s", err)
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return err
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}
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// Draw a frame and log how long it took.
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start := time.Now()
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err = d.Loop()
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err = d.scene.Loop(d)
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if err != nil {
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return err
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}
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@ -131,6 +139,18 @@ func (d *Doodle) Run() error {
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return nil
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}
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// LoadLevel loads a map from JSON into the EditorScene.
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func (d *Doodle) LoadLevel(filename string) error {
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log.Info("Loading level from file: %s", filename)
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scene := &EditorScene{}
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err := scene.LoadLevel(filename)
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if err != nil {
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return err
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}
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d.Goto(scene)
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return nil
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}
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// TODO: not a global
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type Pixel struct {
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start bool
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@ -149,78 +169,3 @@ func (p Pixel) String() string {
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// Grid is a 2D grid of pixels in X,Y notation.
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type Grid map[Pixel]interface{}
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// TODO: a linked list instead of a slice
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var pixelHistory []Pixel
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// Loop runs one loop of the game engine.
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func (d *Doodle) Loop() error {
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// Poll for events.
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ev, err := d.events.Poll(d.ticks)
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if err != nil {
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log.Error("event poll error: %s", err)
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return err
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}
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// Taking a screenshot?
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if ev.ScreenshotKey.Pressed() {
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log.Info("Taking a screenshot")
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d.Screenshot()
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d.SaveLevel()
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}
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// Clear the canvas and fill it with white.
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d.renderer.SetDrawColor(255, 255, 255, 255)
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d.renderer.Clear()
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// Clicking? Log all the pixels while doing so.
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if ev.Button1.Now {
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pixel := Pixel{
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start: ev.Button1.Pressed(),
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x: ev.CursorX.Now,
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y: ev.CursorY.Now,
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dx: ev.CursorX.Now,
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dy: ev.CursorY.Now,
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}
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// Append unique new pixels.
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if len(pixelHistory) == 0 || pixelHistory[len(pixelHistory)-1] != pixel {
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// If not a start pixel, make the delta coord the previous one.
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if !pixel.start && len(pixelHistory) > 0 {
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prev := pixelHistory[len(pixelHistory)-1]
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pixel.dx = prev.x
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pixel.dy = prev.y
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}
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pixelHistory = append(pixelHistory, pixel)
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// Save in the pixel canvas map.
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d.canvas[pixel] = nil
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}
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}
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d.renderer.SetDrawColor(0, 0, 0, 255)
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for i, pixel := range pixelHistory {
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if !pixel.start && i > 0 {
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prev := pixelHistory[i-1]
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if prev.x == pixel.x && prev.y == pixel.y {
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d.renderer.DrawPoint(pixel.x, pixel.y)
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} else {
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d.renderer.DrawLine(
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pixel.x,
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pixel.y,
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prev.x,
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prev.y,
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)
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}
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}
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d.renderer.DrawPoint(pixel.x, pixel.y)
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}
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// Draw the FPS.
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d.DrawDebugOverlay()
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d.renderer.Present()
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return nil
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}
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221
editor_scene.go
Normal file
221
editor_scene.go
Normal file
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@ -0,0 +1,221 @@
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package doodle
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import (
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"fmt"
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"image"
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"image/png"
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"io/ioutil"
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"os"
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"time"
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"git.kirsle.net/apps/doodle/draw"
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"git.kirsle.net/apps/doodle/level"
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)
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// EditorScene manages the "Edit Level" game mode.
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type EditorScene struct {
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// History of all the pixels placed by the user.
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pixelHistory []Pixel
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canvas Grid
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// Canvas size
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width int32
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height int32
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}
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// Setup the editor scene.
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func (e *EditorScene) Setup(d *Doodle) error {
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if e.pixelHistory == nil {
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e.pixelHistory = []Pixel{}
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}
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if e.canvas == nil {
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e.canvas = Grid{}
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}
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e.width = d.width // TODO: canvas width = copy the window size
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e.height = d.height
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return nil
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}
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// Loop the editor scene.
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func (e *EditorScene) Loop(d *Doodle) error {
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ev := d.events
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// Taking a screenshot?
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if ev.ScreenshotKey.Pressed() {
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log.Info("Taking a screenshot")
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e.Screenshot()
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e.SaveLevel()
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}
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// Clear the canvas and fill it with white.
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d.renderer.SetDrawColor(255, 255, 255, 255)
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d.renderer.Clear()
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// Clicking? Log all the pixels while doing so.
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if ev.Button1.Now {
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pixel := Pixel{
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start: ev.Button1.Pressed(),
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x: ev.CursorX.Now,
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y: ev.CursorY.Now,
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dx: ev.CursorX.Now,
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dy: ev.CursorY.Now,
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}
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// Append unique new pixels.
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if len(e.pixelHistory) == 0 || e.pixelHistory[len(e.pixelHistory)-1] != pixel {
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// If not a start pixel, make the delta coord the previous one.
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if !pixel.start && len(e.pixelHistory) > 0 {
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prev := e.pixelHistory[len(e.pixelHistory)-1]
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pixel.dx = prev.x
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pixel.dy = prev.y
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}
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e.pixelHistory = append(e.pixelHistory, pixel)
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// Save in the pixel canvas map.
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e.canvas[pixel] = nil
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}
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}
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d.renderer.SetDrawColor(0, 0, 0, 255)
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for i, pixel := range e.pixelHistory {
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if !pixel.start && i > 0 {
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prev := e.pixelHistory[i-1]
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if prev.x == pixel.x && prev.y == pixel.y {
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d.renderer.DrawPoint(pixel.x, pixel.y)
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} else {
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d.renderer.DrawLine(
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pixel.x,
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pixel.y,
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prev.x,
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prev.y,
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)
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}
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}
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d.renderer.DrawPoint(pixel.x, pixel.y)
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}
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// Draw the FPS.
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d.DrawDebugOverlay()
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d.renderer.Present()
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return nil
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}
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// LoadLevel loads a level from disk.
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func (e *EditorScene) LoadLevel(filename string) error {
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e.pixelHistory = []Pixel{}
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e.canvas = Grid{}
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m, err := level.LoadJSON(filename)
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if err != nil {
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return err
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}
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for _, point := range m.Pixels {
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pixel := Pixel{
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start: true,
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x: point.X,
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y: point.Y,
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dx: point.X,
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dy: point.Y,
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}
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e.pixelHistory = append(e.pixelHistory, pixel)
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e.canvas[pixel] = nil
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}
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return nil
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}
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// SaveLevel saves the level to disk.
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func (e *EditorScene) SaveLevel() {
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m := level.Level{
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Version: 1,
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Title: "Alpha",
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Author: os.Getenv("USER"),
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Width: e.width,
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Height: e.height,
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Palette: []level.Palette{
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level.Palette{
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Color: "#000000",
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Solid: true,
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},
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},
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Pixels: []level.Pixel{},
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}
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for pixel := range e.canvas {
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for point := range draw.Line(pixel.x, pixel.y, pixel.dx, pixel.dy) {
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m.Pixels = append(m.Pixels, level.Pixel{
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X: point.X,
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Y: point.Y,
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Palette: 0,
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})
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}
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}
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json, err := m.ToJSON()
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if err != nil {
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log.Error("SaveLevel error: %s", err)
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return
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}
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filename := fmt.Sprintf("./map-%s.json",
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time.Now().Format("2006-01-02T15-04-05"),
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)
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err = ioutil.WriteFile(filename, json, 0644)
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if err != nil {
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log.Error("Create map file error: %s", err)
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return
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}
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}
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// Screenshot saves the level canvas to disk as a PNG image.
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func (e *EditorScene) Screenshot() {
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screenshot := image.NewRGBA(image.Rect(0, 0, int(e.width), int(e.height)))
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// White-out the image.
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for x := 0; x < int(e.width); x++ {
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for y := 0; y < int(e.height); y++ {
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screenshot.Set(x, y, image.White)
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}
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}
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// Fill in the dots we drew.
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for pixel := range e.canvas {
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// A line or a dot?
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if pixel.x == pixel.dx && pixel.y == pixel.dy {
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screenshot.Set(int(pixel.x), int(pixel.y), image.Black)
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} else {
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for point := range draw.Line(pixel.x, pixel.y, pixel.dx, pixel.dy) {
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screenshot.Set(int(point.X), int(point.Y), image.Black)
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}
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}
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}
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// Create the screenshot directory.
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if _, err := os.Stat("./screenshots"); os.IsNotExist(err) {
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log.Info("Creating directory: ./screenshots")
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err = os.Mkdir("./screenshots", 0755)
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if err != nil {
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log.Error("Can't create ./screenshots: %s", err)
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return
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}
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}
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filename := fmt.Sprintf("./screenshots/screenshot-%s.png",
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time.Now().Format("2006-01-02T15-04-05"),
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)
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fh, err := os.Create(filename)
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if err != nil {
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log.Error(err.Error())
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return
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}
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defer fh.Close()
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if err := png.Encode(fh, screenshot); err != nil {
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log.Error(err.Error())
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return
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}
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}
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3
fps.go
3
fps.go
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@ -27,12 +27,11 @@ func (d *Doodle) DrawDebugOverlay() {
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}
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text := fmt.Sprintf(
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"FPS: %d (%dms) (%d,%d) size=%d F12=screenshot",
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"FPS: %d (%dms) (%d,%d) F12=screenshot",
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fpsCurrent,
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fpsSkipped,
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d.events.CursorX.Now,
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d.events.CursorY.Now,
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len(pixelHistory),
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)
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render.StrokedText(render.TextConfig{
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Text: text,
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17
scene.go
Normal file
17
scene.go
Normal file
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@ -0,0 +1,17 @@
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package doodle
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// Scene is an abstraction for a game mode in Doodle. The app points to one
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// scene at a time and that scene has control over the main loop, and its own
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// state information.
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type Scene interface {
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Setup(*Doodle) error
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Loop(*Doodle) error
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}
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// Goto a scene. First it unloads the current scene.
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func (d *Doodle) Goto(scene Scene) error {
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// d.scene.Destroy()
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log.Info("Goto Scene")
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d.scene = scene
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return d.scene.Setup(d)
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}
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131
screenshot.go
131
screenshot.go
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@ -1,131 +0,0 @@
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package doodle
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import (
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"fmt"
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"image"
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"image/png"
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"io/ioutil"
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"os"
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"time"
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"git.kirsle.net/apps/doodle/draw"
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"git.kirsle.net/apps/doodle/level"
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)
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// SaveLevel saves the level to disk.
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func (d *Doodle) SaveLevel() {
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m := level.Level{
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Version: 1,
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Title: "Alpha",
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Author: os.Getenv("USER"),
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Width: d.width,
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Height: d.height,
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Palette: []level.Palette{
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level.Palette{
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Color: "#000000",
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Solid: true,
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},
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},
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Pixels: []level.Pixel{},
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}
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for pixel := range d.canvas {
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for point := range draw.Line(pixel.x, pixel.y, pixel.dx, pixel.dy) {
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m.Pixels = append(m.Pixels, level.Pixel{
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X: point.X,
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Y: point.Y,
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Palette: 0,
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})
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}
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}
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json, err := m.ToJSON()
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if err != nil {
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log.Error("SaveLevel error: %s", err)
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return
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}
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filename := fmt.Sprintf("./map-%s.json",
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time.Now().Format("2006-01-02T15-04-05"),
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)
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err = ioutil.WriteFile(filename, json, 0644)
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if err != nil {
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log.Error("Create map file error: %s", err)
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return
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}
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}
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// LoadLevel loads a map from JSON.
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func (d *Doodle) LoadLevel(filename string) error {
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log.Info("Loading level from file: %s", filename)
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pixelHistory = []Pixel{}
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d.canvas = Grid{}
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m, err := level.LoadJSON(filename)
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if err != nil {
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return err
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}
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for _, point := range m.Pixels {
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pixel := Pixel{
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start: true,
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x: point.X,
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y: point.Y,
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dx: point.X,
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dy: point.Y,
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}
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pixelHistory = append(pixelHistory, pixel)
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d.canvas[pixel] = nil
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}
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return nil
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}
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// Screenshot saves the level canvas to disk as a PNG image.
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func (d *Doodle) Screenshot() {
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screenshot := image.NewRGBA(image.Rect(0, 0, int(d.width), int(d.height)))
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// White-out the image.
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for x := 0; x < int(d.width); x++ {
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for y := 0; y < int(d.height); y++ {
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screenshot.Set(x, y, image.White)
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}
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}
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// Fill in the dots we drew.
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for pixel := range d.canvas {
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// A line or a dot?
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if pixel.x == pixel.dx && pixel.y == pixel.dy {
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screenshot.Set(int(pixel.x), int(pixel.y), image.Black)
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} else {
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for point := range draw.Line(pixel.x, pixel.y, pixel.dx, pixel.dy) {
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screenshot.Set(int(point.X), int(point.Y), image.Black)
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}
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}
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}
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// Create the screenshot directory.
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if _, err := os.Stat("./screenshots"); os.IsNotExist(err) {
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log.Info("Creating directory: ./screenshots")
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err = os.Mkdir("./screenshots", 0755)
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if err != nil {
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log.Error("Can't create ./screenshots: %s", err)
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return
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}
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}
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filename := fmt.Sprintf("./screenshots/screenshot-%s.png",
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time.Now().Format("2006-01-02T15-04-05"),
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)
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||||
fh, err := os.Create(filename)
|
||||
if err != nil {
|
||||
log.Error(err.Error())
|
||||
return
|
||||
}
|
||||
defer fh.Close()
|
||||
|
||||
if err := png.Encode(fh, screenshot); err != nil {
|
||||
log.Error(err.Error())
|
||||
return
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user