score, game over

app/nose/bin/tetris.ts

@@ -14,23 +14,37 @@ const LOCK_DELAY = 5
 
 type Shape = { x: number, y: number, shape: string, rotation: number }
 
+let score = 0
 let player: Shape
+let nextShape: Shape
 let grid: string[][] = []
 let dead = false
 let downTick = 0
 let moveTick = 0
-let tetrisRows: number[] = []
-let tetrisTimer = 0
+let clearedLines: number[] = []
+let clearedLinesTimer = 0
 let lockTimer = 0
 
+const BORDER_COLOR = "#b388ff"
+const BG_COLOR = "#222"
+const LINE_COLOR = "black"
+const UI_BG_COLOR = "#4c3a87"
+
+const LINE_SCORES = [
+  100,
+  300,
+  500,
+  800
+]
+
 const COLORS: Record<string, string> = {
-  I: "#6fc6ff", // light blue (C64 cyan)
-  O: "#fce94f", // yellow
-  T: "#d87bfb", // light purple
-  S: "#8ae234", // light green
-  Z: "#f35f5f", // red
-  J: "#3465a4", // blue
-  L: "#e9b96e", // orange
+  I: "cyan",
+  O: "yellow",
+  T: "magenta",
+  S: "lime",
+  Z: "red",
+  J: "blue",
+  L: "orange",
 }
 
 // I, O, T, L, J, S, Z
@@ -46,10 +60,6 @@ const SHAPES: Record<string, number[][][]> = {
   ]],
 
   T: [
-    [
-      [0, 1, 0],
-      [1, 1, 1],
-    ],
     [
       [1, 0],
       [1, 1],
@@ -63,6 +73,10 @@ const SHAPES: Record<string, number[][][]> = {
       [0, 1],
       [1, 1],
       [0, 1]
+    ],
+    [
+      [0, 1, 0],
+      [1, 1, 1],
     ]
   ],
 
@@ -109,10 +123,6 @@ const SHAPES: Record<string, number[][][]> = {
   ],
 
   S: [
-    [
-      [0, 1, 1],
-      [1, 1, 0]
-    ],
     [
       [1, 0],
       [1, 1],
@@ -126,14 +136,14 @@ const SHAPES: Record<string, number[][][]> = {
       [1, 0],
       [1, 1],
       [0, 1]
+    ],
+    [
+      [0, 1, 1],
+      [1, 1, 0]
     ]
   ],
 
   Z: [
-    [
-      [1, 1, 0],
-      [0, 1, 1]
-    ],
     [
       [0, 1],
       [1, 1],
@@ -147,44 +157,48 @@ const SHAPES: Record<string, number[][][]> = {
       [0, 1],
       [1, 1],
       [1, 0]
+    ],
+    [
+      [1, 1, 0],
+      [0, 1, 1]
     ]
   ],
 }
 
 export function init() {
+  score = 0
   dead = false
   downTick = 0
   moveTick = 0
-  tetrisTimer = TETRIS_FRAMES
   lockTimer = 0
-  tetrisRows.length = 0
+  clearedLinesTimer = TETRIS_FRAMES
+  clearedLines.length = 0
   grid.length = 0
 
   player = newShape()
+  nextShape = newShape()
 }
 
 export function update(_delta: number, input: InputState) {
-  const keys = input.pressed
+  if (dead) return
 
   if (input.justPressed.has(" ")) {
-    player.rotation += 1
-    if (player.rotation === SHAPES[player.shape]!.length)
-      player.rotation = 0
+    rotateShape()
   }
 
   // tetris animation
-  if (tetrisRows.length > 0) {
-    tetrisTimer--
-    if (tetrisTimer <= 0) {
-      removeTetrisRows()
-      tetrisRows = []
+  if (clearedLines.length > 0) {
+    clearedLinesTimer--
+    if (clearedLinesTimer <= 0) {
+      removeClearedLines()
+      clearedLines = []
     }
   } else if (anyFullRows()) {
-    tetrisRows = findFullRows()
-    tetrisTimer = TETRIS_FRAMES
+    clearedLines = findFullRows()
+    clearedLinesTimer = TETRIS_FRAMES
   }
 
-  const hit = blocked()
+  const hit = isBlocked()
   if (!hit) lockTimer = LOCK_DELAY
 
   if (hit) {
@@ -196,25 +210,8 @@ export function update(_delta: number, input: InputState) {
     }
   }
 
-  if (++moveTick % MOVE_TICK === 0) {
-    if (
-      (keys.has("ArrowLeft") || keys.has("a")) &&
-      !collision(player.x - 1, player.y, player.rotation)
-    )
-      player.x = Math.max(0, player.x - 1)
-
-    if (
-      (keys.has("ArrowRight") || keys.has("d")) &&
-      !collision(player.x + 1, player.y, player.rotation)
-    )
-      player.x = Math.min(COLS, player.x + 1)
-
-    if (
-      (keys.has("ArrowDown") || keys.has("s")) &&
-      !collision(player.x, player.y + 1, player.rotation)
-    )
-      player.y += 1
-  }
+  if (++moveTick % MOVE_TICK === 0)
+    detectMovement(input)
 
   if (++downTick % DOWN_TICK === 0)
     if (!collision(player.x, player.y + 1, player.rotation)) {
@@ -223,8 +220,7 @@ export function update(_delta: number, input: InputState) {
 }
 
 export function draw(game: GameContext) {
-  // game.clear("#6C6FF6")
-  game.clear("#654321")
+  game.clear(UI_BG_COLOR)
 
   const boardW = COLS * CELL
   const boardH = ROWS * CELL
@@ -235,37 +231,39 @@ export function draw(game: GameContext) {
   c.save()
   c.translate(offsetX, offsetY)
 
-  // background
-  game.rectfill(0, 0, boardW, boardH, "black")
+  // lines (shows through cracks between blocks)
+  game.rectfill(0, 0, boardW, boardH, LINE_COLOR)
+
+  // draw border
+  drawBorder(game)
 
   // draw board
-  for (let row = 0; row < ROWS; row++) {
-    for (let col = 0; col < COLS; col++) {
-      let color = grid[row]?.[col] || "gray"
-      if (tetrisRows.includes(row)) color = "white"
-      drawBlock(game, col, row, color)
-    }
-  }
+  drawBoard(game)
 
   // player shape
-  const shape = SHAPES[player.shape]![player.rotation]!
-  for (const row in shape) {
-    for (const col in shape[row]!) {
-      const filled = shape[row][col]
-      if (!filled) continue
+  drawPlayer(game)
 
-      const x = player.x + Number(col)
-      const y = player.y + Number(row)
+  // "next shape" UI
+  drawPreview(game)
 
-      drawBlock(game, x, y, COLORS[player.shape]!)
-    }
-  }
+  // high score
+  game.text(`Score: ${score}`, (COLS + 2) * CELL, (8 * CELL) + 10, "yellow", 15)
 
   c.restore()
 
   // ya dead
-  if (dead) {
-    game.centerText("GAME OVER", "red", 24)
+  if (dead)
+    game.centerText("GAME OVER", "red", 60)
+}
+
+function spawn() {
+  player = nextShape
+  player.x = 3
+  player.y = 0
+  nextShape = newShape()
+
+  if (collision(player.x, player.y, player.rotation)) {
+    dead = true
   }
 }
 
@@ -293,11 +291,12 @@ function findFullRows(): number[] {
   return rows
 }
 
-function removeTetrisRows() {
+function removeClearedLines() {
   const newGrid: string[][] = []
+  score += LINE_SCORES[clearedLines.length - 1] || 0
 
   for (let y = 0; y < ROWS; y++)
-    if (!tetrisRows.includes(y))
+    if (!clearedLines.includes(y))
       newGrid.push(grid[y] ?? [])
 
   // add empty rows on top to restore height
@@ -305,7 +304,7 @@ function removeTetrisRows() {
     newGrid.unshift([])
 
   grid = newGrid
-  tetrisRows = []
+  clearedLines = []
 }
 
 function collision(x: number, y: number, rotation: number): boolean {
@@ -342,10 +341,10 @@ function lockShape() {
     }
   }
 
-  player = newShape()
+  spawn()
 }
 
-function blocked(): boolean {
+function isBlocked(): boolean {
   const shape = SHAPES[player.shape]![player.rotation]!
   let hit = false
 
@@ -369,6 +368,28 @@ function blocked(): boolean {
   return hit
 }
 
+function detectMovement(input: InputState) {
+  const keys = input.pressed
+
+  if (
+    (keys.has("ArrowLeft") || keys.has("a")) &&
+    !collision(player.x - 1, player.y, player.rotation)
+  )
+    player.x = Math.max(0, player.x - 1)
+
+  if (
+    (keys.has("ArrowRight") || keys.has("d")) &&
+    !collision(player.x + 1, player.y, player.rotation)
+  )
+    player.x = Math.min(COLS, player.x + 1)
+
+  if (
+    (keys.has("ArrowDown") || keys.has("s")) &&
+    !collision(player.x, player.y + 1, player.rotation)
+  )
+    player.y += 1
+}
+
 function drawBlock(game: GameContext, x: number, y: number, color: string) {
   game.rectfill(
     x * CELL,
@@ -377,4 +398,116 @@ function drawBlock(game: GameContext, x: number, y: number, color: string) {
     ((y + 1) * CELL) - .5,
     color
   )
+}
+
+// I, O, T, L, J, S, Z
+const PREVIEW_OFFSETS: Record<string, [number, number]> = {
+  I: [2, 3],
+  O: [3, 2],
+  T: [3, 2],
+  L: [3, 2],
+  J: [3, 2],
+  S: [3, 2],
+  Z: [3, 2],
+}
+
+// draw next shape (top-right corner)
+function drawPreview(game: GameContext) {
+  const previewX = COLS + 2
+  const previewY = 0
+  const cols = 7
+  const rows = 7
+
+  // lines (shows through cracks between blocks)
+  game.rectfill(
+    previewX * CELL,
+    previewY * CELL,
+    (previewX + cols) * CELL,
+    (previewY + rows) * CELL,
+    LINE_COLOR
+  )
+  // draw board
+  for (let row = 0; row < rows; row++) {
+    for (let col = 0; col < cols; col++) {
+      drawBlock(game, previewX + col, previewY + row, BG_COLOR)
+    }
+  }
+
+  // draw border
+  for (let col = -1; col < cols; col++) {
+    drawBlock(game, previewX + col + 1, previewY + -1, BORDER_COLOR)
+    drawBlock(game, previewX + col + 1, previewY + rows, BORDER_COLOR)
+  }
+
+  for (let row = -1; row < rows; row++) {
+    drawBlock(game, previewX, previewY + row, BORDER_COLOR)
+    drawBlock(game, previewX + cols, previewY + row, BORDER_COLOR)
+  }
+
+  const next = SHAPES[nextShape.shape]![0]!
+  for (let row = 0; row < next.length; row++) {
+    for (let col = 0; col < next[row]!.length; col++) {
+      if (!next[row]![col]) continue
+      const [offsetX, offsetY] = PREVIEW_OFFSETS[nextShape.shape]!
+      drawBlock(game, previewX + col + offsetX, previewY + row + offsetY, COLORS[nextShape.shape]!)
+    }
+  }
+}
+
+function rotateShape() {
+  const oldRot = player.rotation
+  const newRot = (oldRot + 1) % SHAPES[player.shape]!.length
+
+  if (!collision(player.x, player.y, newRot)) {
+    player.rotation = newRot
+    return
+  }
+
+  if (!collision(player.x + 1, player.y, newRot)) {
+    player.x += 1
+    player.rotation = newRot
+    return
+  }
+
+  if (!collision(player.x - 1, player.y, newRot)) {
+    player.x -= 1
+    player.rotation = newRot
+    return
+  }
+}
+
+function drawBorder(game: GameContext) {
+  for (let col = -1; col <= COLS; col++) {
+    drawBlock(game, col, -1, BORDER_COLOR)
+    drawBlock(game, col, ROWS, BORDER_COLOR)
+  }
+  for (let row = 0; row < ROWS; row++) {
+    drawBlock(game, -1, row, BORDER_COLOR)
+    drawBlock(game, COLS, row, BORDER_COLOR)
+  }
+}
+
+function drawBoard(game: GameContext) {
+  for (let row = 0; row < ROWS; row++) {
+    for (let col = 0; col < COLS; col++) {
+      let color = grid[row]?.[col] || BG_COLOR
+      if (clearedLines.includes(row)) color = "white"
+      drawBlock(game, col, row, color)
+    }
+  }
+}
+
+function drawPlayer(game: GameContext) {
+  const shape = SHAPES[player.shape]![player.rotation]!
+  for (const row in shape) {
+    for (const col in shape[row]!) {
+      const filled = shape[row][col]
+      if (!filled) continue
+
+      const x = player.x + Number(col)
+      const y = player.y + Number(row)
+
+      drawBlock(game, x, y, COLORS[player.shape]!)
+    }
+  }
 }