371 lines
10 KiB
TypeScript
371 lines
10 KiB
TypeScript
import { text, loge, log, ViewHolder, Stack, ViewModel, Gravity, Text, Color, Group, VMPanel, LayoutSpec, vlayout, hlayout, takeNonNull } from "doric";
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type SnakeNode = {
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x: number
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y: number
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prev?: SnakeNode
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next?: SnakeNode
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}
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enum Direction {
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left = 0,
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right = 1,
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up = 2,
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down = 3,
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}
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enum State {
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idel,
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run,
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fail,
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}
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class SnakeModel {
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state = State.idel
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direction = Direction.right
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width: number
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height: number
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constructor(w: number, h: number) {
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this.width = w
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this.height = h
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}
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food = { x: -1, y: -1 }
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head: SnakeNode = {
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x: 0,
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y: 0,
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}
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refreshFood() {
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this.food.x = Math.floor(Math.random() * (this.width - 1))
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this.food.y = Math.floor(Math.random() * (this.height - 1))
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}
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get tail() {
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let node = this.head
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while (node.next !== undefined) {
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node = node.next
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}
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return node
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}
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get score() {
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let node = this.head
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let n = 0
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while (node.next !== undefined) {
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n++
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node = node.next
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}
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return n
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}
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forward(node: SnakeNode) {
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switch (this.direction) {
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case Direction.left:
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node.x -= 1
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break;
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case Direction.right:
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node.x += 1
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break;
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case Direction.up:
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node.y -= 1
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break;
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case Direction.down:
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node.y += 1
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break;
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}
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}
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step() {
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if (this.state !== State.run) {
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return
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}
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let tail = this.tail
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while (tail.prev != undefined) {
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tail.x = tail.prev.x
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tail.y = tail.prev.y
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tail = tail.prev
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}
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this.forward(this.head)
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if (this.head.x < 0 || this.head.x >= this.width
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|| this.head.y < 0 || this.head.y >= this.height) {
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//If out of bound
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loge('out of bound')
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this.state = State.fail
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} else if (this.head.x == this.food.x && this.head.y == this.food.y) {
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//If eat food
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let head: SnakeNode = { x: this.food.x, y: this.food.y }
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log('eat food', head)
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this.forward(head)
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this.head.prev = head
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head.next = this.head
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this.head = head
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this.refreshFood()
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}
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if (this.crashAtSelf()) {
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//If crash at self
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loge('crash at self')
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this.state = State.fail
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}
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}
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crashAtSelf() {
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let cur = this.head.next
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while (cur !== undefined) {
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if (cur.x == this.head.x && cur.y == this.head.y) {
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return true
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}
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cur = cur.next
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}
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return false
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}
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reset() {
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this.direction = Direction.right
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this.state = State.run
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this.head.x = 0
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this.head.y = 0
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this.head.next = undefined
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this.refreshFood()
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}
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}
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class SnakeView extends ViewHolder {
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panel!: Stack
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start?: Text
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up?: Text
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down?: Text
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left?: Text
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right?: Text
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build(root: Group): void {
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root.backgroundColor = Color.parse('#000000')
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vlayout([
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text({
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text: "Snake",
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textSize: 20,
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textColor: Color.parse("#ffffff"),
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layoutConfig: {
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alignment: new Gravity().centerX(),
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margin: {
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top: 20
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},
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widthSpec: LayoutSpec.FIT,
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heightSpec: LayoutSpec.FIT,
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},
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}),
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(new Stack).also(panel => {
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panel.backgroundColor = Color.parse('#00ff00')
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this.panel = panel
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}),
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hlayout([
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text({
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text: "Start",
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textSize: 30,
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textColor: Color.parse("#ffffff"),
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layoutConfig: {
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widthSpec: LayoutSpec.FIT,
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heightSpec: LayoutSpec.FIT,
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},
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}).also(it => this.start = it),
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]).also(it => {
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it.layoutConfig = {
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widthSpec: LayoutSpec.FIT,
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heightSpec: LayoutSpec.FIT,
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}
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}),
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vlayout([
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hlayout([
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text({
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width: 50,
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height: 50,
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text: "↑",
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textSize: 30,
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textAlignment: new Gravity().center(),
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backgroundColor: Color.parse('#ffff00'),
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layoutConfig: {
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widthSpec: LayoutSpec.JUST,
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heightSpec: LayoutSpec.JUST,
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},
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}).also(it => this.up = it)
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]).also(it => {
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it.layoutConfig = {
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widthSpec: LayoutSpec.FIT,
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heightSpec: LayoutSpec.FIT,
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}
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}),
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hlayout([
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text({
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width: 50,
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height: 50,
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text: "←",
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textSize: 30,
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textAlignment: new Gravity().center(),
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backgroundColor: Color.parse('#ffff00'),
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layoutConfig: {
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widthSpec: LayoutSpec.JUST,
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heightSpec: LayoutSpec.JUST,
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},
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}).also(it => this.left = it),
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text({
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width: 50,
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height: 50,
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text: "↓",
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textSize: 30,
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textAlignment: new Gravity().center(),
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backgroundColor: Color.parse('#ffff00'),
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layoutConfig: {
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widthSpec: LayoutSpec.JUST,
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heightSpec: LayoutSpec.JUST,
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},
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}).also(it => this.down = it),
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text({
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width: 50,
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height: 50,
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text: "→",
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textSize: 30,
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textAlignment: new Gravity().center(),
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backgroundColor: Color.parse('#ffff00'),
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layoutConfig: {
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widthSpec: LayoutSpec.JUST,
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heightSpec: LayoutSpec.JUST,
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},
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}).also(it => this.right = it),
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]).also(it => {
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it.layoutConfig = {
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widthSpec: LayoutSpec.FIT,
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heightSpec: LayoutSpec.FIT,
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}
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it.space = 10
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}),
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]).also(controlArea => {
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controlArea.gravity = new Gravity().centerX()
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controlArea.space = 10
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controlArea.layoutConfig = {
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alignment: new Gravity().centerX(),
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widthSpec: LayoutSpec.FIT,
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heightSpec: LayoutSpec.FIT,
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}
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}),
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]).also(it => {
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it.space = 20
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it.layoutConfig = {
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alignment: new Gravity().centerX().top(),
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widthSpec: LayoutSpec.MOST,
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heightSpec: LayoutSpec.MOST,
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}
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it.gravity = new Gravity().centerX()
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}).in(root)
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}
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bind(state: SnakeModel): void {
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log('build', state)
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this.panel.width = state.width * 10
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this.panel.height = state.height * 10
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let node: SnakeNode | undefined = state.head
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let nodes: SnakeNode[] = []
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while (node != undefined) {
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nodes.push(node)
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node = node.next
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}
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nodes.push(state.food)
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nodes.forEach((e, index) => {
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let item = this.panel.children[index]
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if (item === undefined) {
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item = new Stack
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item.width = item.height = 10
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item.corners = 5
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item.shadow = {
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color: Color.GRAY,
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opacity: 1,
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radius: 3,
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offsetX: 3,
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offsetY: 3,
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}
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this.panel.addChild(item)
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}
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if (index === nodes.length - 1) {
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item.backgroundColor = Color.parse('#ffff00')
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} else {
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item.backgroundColor = Color.parse('#ff0000')
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}
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item.x = e.x * 10
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item.y = e.y * 10
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})
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if (nodes.length < this.panel.children.length) {
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this.panel.children.length = nodes.length
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}
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}
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}
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class SnakeVM extends ViewModel<SnakeModel, SnakeView>{
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timerId?: any
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start = () => {
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if (this.timerId !== undefined) {
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clearInterval(this.timerId)
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}
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this.updateState(it => it.reset())
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this.timerId = setInterval(() => {
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this.updateState(it => it.step())
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if (this.getState().state === State.fail) {
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loge('Game Over')
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this.stop()
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}
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}, 500)
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}
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stop = () => {
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if (this.timerId !== undefined) {
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clearInterval(this.timerId)
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this.timerId = undefined
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}
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}
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left = () => {
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this.updateState(it => it.direction = Direction.left)
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}
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right = () => {
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this.updateState(it => it.direction = Direction.right)
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}
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up = () => {
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this.updateState(it => it.direction = Direction.up)
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}
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down = () => {
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this.updateState(it => it.direction = Direction.down)
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}
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onAttached(state: SnakeModel, v: SnakeView) {
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takeNonNull(v.start)(it => it.onClick = this.start)
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takeNonNull(v.left)(it => it.onClick = this.left)
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takeNonNull(v.right)(it => it.onClick = this.right)
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takeNonNull(v.up)(it => it.onClick = this.up)
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takeNonNull(v.down)(it => it.onClick = this.down)
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}
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onBind(state: SnakeModel, v: SnakeView) {
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v.bind(state)
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}
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}
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@Entry
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class SnakePanel extends VMPanel<SnakeModel, SnakeView>{
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getViewModelClass() {
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return SnakeVM
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}
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getState(): SnakeModel {
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return new SnakeModel(35, 35)
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}
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getViewHolderClass() {
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return SnakeView
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}
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} |