tweak an entry in the audit log - teliva - Fork of Lua 5.1 to encourage end-user programming

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author	Kartik K. Agaram <vc@akkartik.com>	2022-02-02 23:38:45 -0800
committer	Kartik K. Agaram <vc@akkartik.com>	2022-02-02 23:38:45 -0800
commit	8f8a0e5a181de799ce95c5d91c0266e0a06671d8 (patch)
tree	74a97067ff18ede3f7300ba76d499c23ef6b331e /src/lobject.h
parent	f5a1c22dc5ef38ed79d0775bf17b65257b46ee38 (diff)
download	teliva-8f8a0e5a181de799ce95c5d91c0266e0a06671d8.tar.gz

tweak an entry in the audit log

Diffstat (limited to 'src/lobject.h')

0 files changed, 0 insertions, 0 deletions

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// configure the canvas -- our playspace...magic circle and what not
const canvas = document.getElementById("gameCanvas");
canvas.width = 512;
canvas.height = 512;
const ctx = canvas.getContext("2d");
ctx.fillStyle = "#E0F8CF";
ctx.fillRect(0, 0, canvas.width, canvas.height);


// our noble avatar into playspace
const player = {
  x: 50,
  y: 50,
  width: 16,
  height: 16,
  step: 10,
  color: "#65ff00",
  colorAlt: "pink",
  spriteUrl: "chickadee.svg"
};

const playerSprite = new Image();
playerSprite.src = player.spriteUrl;


const npc = {
  x: 100, // starting x-position
  y: 100, // starting y-position
  width: 16, // width of the NPC
  height: 16, // height of the NPC
  color: 'pink' // color of the NPC
};

// Function to draw the NPC
function drawNPC() {
  ctx.fillStyle = npc.color;
  ctx.fillRect(npc.x, npc.y, npc.width, npc.height);
}


// add keyboard input
// FIXME: this input is blocking, allowing for only 1 key to be read at a time
// this means that if you wanna do 2 things at 1 time you cannot.
// For more info, <https://medium.com/@dovern42/handling-multiple-key-presses-at-once-in-vanilla-javascript-for-game-controllers-6dcacae931b7>
document.addEventListener("keydown", (event) => {
  switch (event.code) {
    case "ArrowLeft":
    case "KeyH":
    case "KeyA":
      player.x -= player.step;
      break;
    case "ArrowRight":
    case "KeyL":
    case "KeyD":
      player.x += player.step;
      break;
    case "ArrowUp":
    case "KeyK":
    case "KeyW":
      player.y -= player.step;
      break;
    case "ArrowDown":
    case "KeyJ":
    case "KeyS":
      player.y += player.step;
      break;
    case "KeyZ":
    case "KeyN":
      console.log('Action A');
      break;
    case "KeyX":
    case "KeyM":
      console.log('Action B');
      break;
  }
});


// game loop
function gameLoop() {
  // clear the canvas every tick
  ctx.clearRect(0, 0, canvas.width, canvas.height);

  // looping canvas space so you can't wander out of view
  // this feels like a hack...
  if (player.x < 0) {
    player.x = canvas.width - 1
  }
  if (player.x > canvas.width) {
    player.x = 1
  }
  if (player.y < 0) {
    player.y = canvas.height - 1
  }
  if (player.y > canvas.height) {
    player.y = 1
  }
  
  // detect if the player is touching the NPC
  if (player.x < npc.x + npc.width && player.x + player.width > npc.x && player.y < npc.y + npc.height && player.y + player.height > npc.y) {
    // collision detected!
    console.log('collision detected!');
    // change the color of the NPC
    npc.color = 'red';
  }

  // draw
  // ctx.fillStyle = player.color;
  ctx.fillRect(player.x, player.y, player.width, player.height);  
  ctx.drawImage(playerSprite, player.x, player.y, player.width, player.height);
  drawNPC();

  // next frame
  requestAnimationFrame(gameLoop);
}

// start the game loop
requestAnimationFrame(gameLoop);




 
generated by cgit-pink 1.4.1-2-gfad0 (git 2.36.2.497.gbbea4dcf42) at 2024-12-11 11:17:15 +0000


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