Difference between revisions of "Today"

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<edcode>
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Useful things to refer to.
  
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var player = {x:300,y:400}  // The starting position of the player
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*[[Variables]]
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*[[If statements]]
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*[[Coordinates]]
  
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var alien = {x:200,y:100}    // The starting position of the alien
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The [[API|API page]] has a list of some of the functions you can use such as
  
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var bullet = {x:200, y:200}
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*[[API#clear();|clear()]]
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*[[API#fillCircle_.28x.2C_y.2C_radius.29.3B|fillCircle()]] .
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*[[API#keyIsDown.28keyCode.29|keyIsDown()]] .
  
  
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function move() {
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<edcode>
  
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  //37 is the key code of the left arrow key
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var cx=320;
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  if ( keyIsDown(37) ) {
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var cy=240;
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    player.x-=2;
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var power=1;
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  } 
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var penSize=4;
  
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  //39 is the key code of the right arrow key
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var lastx=cx;
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  if ( keyIsDown(39) ) {
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var lasty=cy;
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    player.x+=2;
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  } 
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}
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function move() {   
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  var dx = cx-lastx;
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  var dy = cy-lasty;
  
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function draw() {
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   lastx=cx;
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   clear();
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   lasty=cy;
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   print("player");
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   print(player.x);
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    // the arrow keys have key codes 37,38,39 and 40
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  drawPlayerShip(player.x,player.y);
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   if (keyIsDown(38)) {
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    cy-=power;  
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   }
  
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   drawAlienShip(alien.x,alien.y);
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   if (keyIsDown(40)) {
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    cy+=power;
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  }
  
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   drawBullet(bullet.x,bullet.y)
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   if (keyIsDown(37)) {
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}
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    cx-=power;
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  }
  
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function drawPlayerShip(x,y) {
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  if (keyIsDown(39)) {
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   drawLine(x,y-30, x+10,y+30);
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    cx+=power;
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  drawLine(x,y-30, x-10,y+30);
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  }
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  setColour("purple");
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  fillCircle(cx,cy,penSize);
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}
 
}
  
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function drawAlienShip(x,y) {
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run(move);
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  fillCircle(x,y,20);
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</edcode>
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}
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function drawBullet(x,y) {
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This program is also available at http://jsbin.com/kizubop/1/edit?js,output
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  fillCircle(x,y,3);
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}
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run(move,draw);
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</edcode>
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Revision as of 00:58, 23 June 2017

Useful things to refer to.

The API page has a list of some of the functions you can use such as


This program is also available at http://jsbin.com/kizubop/1/edit?js,output

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