moved images to res, changed code accordingly

gameobjects/animate.go

@@ -0,0 +1,78 @@
+package gameobjects
+
+import (
+	"github.com/faiface/pixel"
+	"github.com/faiface/pixel/pixelgl"
+)
+
+type Animate struct {
+	//PlayerVec pixel.Vec
+	Sprite   *pixel.Sprite
+	Up       []pixel.Rect
+	Down     []pixel.Rect
+	Left     []pixel.Rect
+	Right    []pixel.Rect
+	Idle     bool
+	Dir      int
+	Frame    int
+	Current  []pixel.Rect
+	SprSheet pixel.Picture
+	Speed 	 int64
+}
+
+func NewAnimation(spriteSheet pixel.Picture, sprFrames []pixel.Rect) Animate {
+	var animation Animate
+	for i := 0; i < 3; i++ {
+		animation.Up = append(animation.Up, sprFrames[i])
+	}
+	for i := 3; i < 6; i++ {
+		animation.Right = append(animation.Right, sprFrames[i])
+	}
+	for i := 6; i < 9; i++ {
+		animation.Left = append(animation.Left, sprFrames[i])
+	}
+	for i := 9; i < 12; i++ {
+		animation.Down = append(animation.Down, sprFrames[i])
+	}
+
+	animation.Current = animation.Down
+	animation.SprSheet = spriteSheet
+	animation.Sprite = pixel.NewSprite(spriteSheet, animation.Current[0])
+	animation.Frame = 0
+	animation.Idle = false
+	animation.Speed = 6
+	return animation
+}
+
+var elapsedTime int64 = 0
+
+func (a *Animate) Update(dt int64) {
+	var direction int = a.Dir
+	switch direction {
+	case 0:
+		a.Current = a.Up
+	case 1:
+		a.Current = a.Down
+	case 2:
+		a.Current = a.Left
+	case 3:
+		a.Current = a.Right
+	}
+	elapsedTime += dt
+	if elapsedTime >= 1000000000/ a.Speed{
+		a.Frame++
+		elapsedTime -= 1000000000 / a.Speed
+	}
+	if a.Frame >= 3 {
+		a.Frame = 0
+	}
+	if a.Idle {
+		a.Frame = 0
+	}
+	a.Sprite.Set(a.SprSheet, a.Current[a.Frame])
+}
+
+func (a *Animate) Render(win *pixelgl.Window, pVec pixel.Vec) {
+	a.Sprite.Draw(win, pixel.IM.Scaled(pixel.ZV, 4).Moved(pVec))
+
+}

gameobjects/player.go

@@ -0,0 +1,86 @@
+package gameobjects
+
+import (
+	"github.com/faiface/pixel"
+	"github.com/faiface/pixel/pixelgl"
+	//"fmt"
+)
+
+type Player struct {
+	PlayerVec   pixel.Vec
+	sprFrame    int
+	spriteSheet pixel.Picture
+	sprFrames   []pixel.Rect
+	sprite      *pixel.Sprite
+	speed       float64
+	dir         int
+	animation   Animate
+}
+
+func NewPlayer(win *pixelgl.Window, spriteSheet pixel.Picture) Player {
+	var p Player
+	p.PlayerVec = pixel.Vec{
+		X: win.Bounds().Max.X / 2,
+		Y: win.Bounds().Max.Y / 2,
+	}
+	p.sprFrame = 9
+	p.spriteSheet = spriteSheet
+	p.sprFrames = createSpriteFrames(spriteSheet)
+	p.animation = NewAnimation(p.spriteSheet, p.sprFrames)
+	//p.sprite = pixel.NewSprite(spriteSheet, p.sprFrames[p.sprFrame])
+	p.speed = 10.0
+	return p
+}
+
+func (p *Player) Update(win *pixelgl.Window, dt int64) {
+	var vecX, vecY float64 = 0, 0
+	speed := p.speed
+
+	if win.Pressed(pixelgl.KeyA) { //left
+		p.sprFrame = 6
+		p.dir = 2
+		vecX -= speed
+	}
+	if win.Pressed(pixelgl.KeyD) { //Right
+		p.sprFrame = 3
+		p.dir = 3
+		vecX += speed
+	}
+	if win.Pressed(pixelgl.KeyS) { //Down
+		p.sprFrame = 9
+		p.dir = 1
+		vecY -= speed
+	}
+	if win.Pressed(pixelgl.KeyW) { //up
+		p.sprFrame = 0
+		p.dir = 0
+		vecY += speed
+	}
+	if vecY == 0 && vecX == 0 {
+		p.animation.Idle = true
+	} else {
+		p.animation.Idle = false
+	}
+	//p.sprite.Set(p.spriteSheet, p.sprFrames[p.sprFrame])
+	p.animation.Dir = p.dir
+	p.animation.Update(dt)
+
+	p.PlayerVec.X += vecX
+	p.PlayerVec.Y += vecY
+}
+
+func (p *Player) Render(win *pixelgl.Window) { //include batch later
+	//p.sprite.Draw(win, pixel.IM.Scaled(pixel.ZV, 4).Moved(p.PlayerVec))
+	p.animation.Render(win, p.PlayerVec)
+}
+
+func createSpriteFrames(spriteSheet pixel.Picture) []pixel.Rect {
+	var sprFrames []pixel.Rect
+	var frameHeight, frameWidth float64 = 96, 96
+	for y := spriteSheet.Bounds().Min.Y; y < frameHeight*4; y += 96 {
+		for x := spriteSheet.Bounds().Min.X; x < frameWidth*3; x += 96 {
+			sprFrames = append(sprFrames, pixel.R(x, y, x+96, y+96)) // (x, y, width, height) of frame
+		}
+	}
+	return sprFrames
+}

main.go

@@ -9,6 +9,7 @@ import (
 
 	_ "image/png"
 
+	"gitbutter.pw/zolfite/project-rpg/gameobjects"
 	"github.com/faiface/pixel"
 	"github.com/faiface/pixel/pixelgl"
 	"golang.org/x/image/colornames"
@@ -38,13 +39,13 @@ func run() {
 		panic(err)
 	}
 
-	spritesheet, err := loadPicture("sprites.png")
+	spritesheet, err := loadPicture("res/sprites.png")
 	if err != nil {
 		panic(err)
 	}
 	//batch := pixel.NewBatch(&pixel.TrianglesData{}, spritesheet)
 
-	background, err := loadPicture("background.png")
+	background, err := loadPicture("res/background.png")
 
 	if err != nil {
 		panic(err)
@@ -52,24 +53,8 @@ func run() {
 	bg := pixel.NewSprite(background, background.Bounds())
 	//batch := pixel.NewBatch(&pixel.TrianglesData{}, spritesheet)
 
-	/*
-		When creating the sprite, you need to know big each frame is inside the spritesheet.
-		If you use aseprite or some other pixel art program, you can find the number of pixels
-		within each frame. For our sprite sheet, each frame is 96 px wide and 96 px high. So
-		we increment it by 96 for both x and y so that it can get the position of the frame
-		at the bottom right corner.
-	*/
-	var spritesFrames []pixel.Rect
-	for x := spritesheet.Bounds().Min.X; x < spritesheet.Bounds().Max.X; x += 96 {
-		for y := spritesheet.Bounds().Min.Y; y < spritesheet.Bounds().Max.Y; y += 96 {
-			spritesFrames = append(spritesFrames, pixel.R(x, y, x+96, y+96)) // (x, y, width, height) of frame
-		}
-	}
-	Sprite := pixel.NewSprite(spritesheet, spritesFrames[3])
-
 	var (
-		camPos = pixel.ZV
-		//camSpeed     = 500.0
+		camPos       = pixel.ZV
 		camZoom      = 0.3
 		camZoomSpeed = 1.2
 	)
@@ -78,15 +63,7 @@ func run() {
 		frames = 0
 		second = time.Tick(time.Second)
 	)
-	playerX := win.Bounds().Max.X / 2
-	playerY := win.Bounds().Max.Y / 2
-
-	var (
-		playerXY = pixel.Vec{
-			playerX,
-			playerY,
-		}
-	)
+	player := gameobjects.NewPlayer(win, spritesheet)
 
 	var fps int64 = 60
 	timePerFrame := 1000000000 / fps
@@ -105,44 +82,14 @@ func run() {
 
 			// *** Update begins *** //
 
-			playerXY = pixel.Vec{
-				playerX,
-				playerY,
-			}
 			cam := pixel.IM.Scaled(camPos, camZoom).Moved(win.Bounds().Center().Sub(camPos))
 
 			win.SetMatrix(cam)
-			/*
-				This is where Sprite and bg was originally. Creating them over and over inside
-				the main loop is not very good resource management. When i added my own dt, the game was
-				only going about 22 fps, when it should've been going 60. I moved them
-				out of the loop and created them up top. It fixed it and now runs faster.
 
-				the tutorial only has it in the loop with the exception that it creates it only
-				if you click the button to make a tree. It only created it once and added it.
-			*/
+			player.Update(win, dt)
 
-			//mouse := cam.Unproject(win.MousePosition())
-
-			speed := 10.0
-			if win.Pressed(pixelgl.KeyA) { //left
-				playerX -= speed
-				Sprite.Set(spritesheet, spritesFrames[2])
-			}
-			if win.Pressed(pixelgl.KeyD) { //Right
-				playerX += speed
-				Sprite.Set(spritesheet, spritesFrames[1])
-			}
-			if win.Pressed(pixelgl.KeyS) { //Down
-				playerY -= speed
-				Sprite.Set(spritesheet, spritesFrames[3])
-			}
-			if win.Pressed(pixelgl.KeyW) { //up
-				playerY += speed
-				Sprite.Set(spritesheet, spritesFrames[0])
-			}
-			camPos.X = playerX
-			camPos.Y = playerY
+			camPos.X = player.PlayerVec.X
+			camPos.Y = player.PlayerVec.Y
 			camZoom *= math.Pow(camZoomSpeed, win.MouseScroll().Y)
 
 			// *** Update Ends *** //
@@ -150,13 +97,13 @@ func run() {
 			// *** Render begin *** //
 			win.Clear(colornames.Forestgreen)
 			bg.Draw(win, pixel.IM.Moved(win.Bounds().Center()))
-			Sprite.Draw(win, pixel.IM.Scaled(pixel.ZV, 4).Moved(playerXY))
+			player.Render(win)
 
 			//batch.Draw(win)
 			win.Update()
 
 			// *** Render End *** //
-
+			dt = 0
 			frames++
 			select {
 			case <-second: