Combining Bitmaps and Sound - HTML5 Canvas - page 480

function setTextStyleTitle() {
context.fillStyle = '#54ebeb';
context.font = '20px _sans';
context.textBaseline = 'top';
}
function setTextStyleCredits() {
context.fillStyle = '#ffffff';
context.font = '12px _sans';
context.textBaseline = 'top';
}
function renderScoreBoard() {
context.fillStyle = "#ffffff";
context.fillText('Score ' + score, 10, 20);
renderPlayerShip(200,16,270,.75)
context.fillText('X ' + playerShips, 220, 20);
context.fillText('FPS: ' + frameRateCounter.lastFrameCount, 300,20)
}
function checkKeys() {
//check keys
if (keyPressList[38]==true){
//thrust
var angleInRadians = player.rotation * Math.PI / 180;
player.facingX = Math.cos(angleInRadians);
player.facingY = Math.sin(angleInRadians);
var movingXNew = player.movingX+player.thrustAcceleration*player.facingX;
var movingYNew = player.movingY+player.thrustAcceleration*player.facingY;
var currentVelocity = Math.sqrt ((movingXNew*movingXNew) +
(movingXNew*movingXNew));
if (currentVelocity < player.maxVelocity) {
player.movingX = movingXNew;
player.movingY = movingYNew;
}
player.thrust = true;
}else{
player.thrust = false;
}
if (keyPressList[37]==true) {
//rotate counterclockwise
player.rotation -= player.rotationalVelocity;
if (player.rotation <0) {
player.rotation = 350
}