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t4a03-complete-fred2.html
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t4a03-complete-fred2.html
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<html>
<head>
<title>Game base for Android and Apple</title>
<script>
//Global variables here
myBgPosY = 0; // present vertical position
myBgPosX = 0; // present horizonal position
myBgHeight = 402; // height of background image
myBgWidth = 753; // width of background image
myBgSpeedYdown = 0; // speed moving down
myBgSpeedXright = 0; // speed moving right
<!-- ******************** Background Scrolling ************************** -->
// myScroll function controls the moving of the background image
function myScroll() {
myAuto()
checkAll()
myBgPosY += myBgSpeedYdown;
if (myBgPosY > myBgHeight) {myBgPosY = 0}
if (myBgPosY <0) {myBgPosY = myBgHeight}
myBgPosX += myBgSpeedXright;
if (myBgPosX > myBgWidth) {myBgPosX = 0}
if (myBgPosX <0) {myBgPosX = myBgWidth}
myBgObject.style.backgroundPosition = myBgPosX+" " + myBgPosY;
}
<!-- ******************** Object Detection Starts below ************************** -->
// myHitXY function determines if any object has hit an x, y location. Note it is better to use the myHitOther function
function myHitXY(my1,X,Y){
left1 = parseInt(document.getElementById(my1).style.left)
right1 = left1 + parseInt(document.getElementById(my1).style.width)
top1 = parseInt(document.getElementById(my1).style.top)
bottom1 = top1 + parseInt(document.getElementById(my1).style.height)
document.getElementById('myShowDiv1').innerHTML = right1 +', '+ left1 +', '+ top1 +', '+ bottom1
if ((left1 <= X ) &&
(right1 >= X ) &&
(top1 <= Y ) &&
(bottom1 >= Y ) ){
return true
}
}
// myHitOther function determines if two obejcts have hit each other.
function myHitOther(my1,my2){
left1 = parseInt(document.getElementById(my1).style.left)
right1 = left1 + parseInt(document.getElementById(my1).style.width)
top1 = parseInt(document.getElementById(my1).style.top)
bottom1 = top1 + parseInt(document.getElementById(my1).style.height)
left2 = parseInt(document.getElementById(my2).style.left)
right2 = left2 + parseInt(document.getElementById(my2).style.width)
top2 = parseInt(document.getElementById(my2).style.top)
bottom2 = top2 + parseInt(document.getElementById(my2).style.height)
if ((right1 >= left2 ) &&
(bottom1 >= top2 ) &&
(left1 <= right2 ) &&
(top1 <= bottom2) ){
return true
}
}
// Group all your detection code here
function checkAll(){
if (myHitXY('move1',200,280)) {
document.getElementById('myShowDiv3').innerHTML = 'You hit the red dot'
} else {document.getElementById('myShowDiv3').innerHTML = ''}
if (myHitOther('move1','move2')) {
document.getElementById('myShowDiv3').innerHTML = 'You hit object move2'
}
if (myHitOther('bullet1','move2')) {
document.getElementById('myShowDiv3').innerHTML = 'The bullet hit move 2'
document.getElementById('bullet1').style.visibility = 'hidden'
document.getElementById('bullet1').style.left = '-200px'
clearInterval(document.myShot)
}
// just shows where your two objects are to help with debugging
document.getElementById('myShowDiv1').innerHTML = left1 +', '+ right1 +', '+ top1 +', '+ bottom1
document.getElementById('myShowDiv2').innerHTML = left2 +', '+ right2 +', '+ top2 +', '+ bottom2
}
<!-- ******************** Object Detection finished ************************** -->
<!-- ******************** Object Motion Below ************************** -->
document.mySpeedX = 0;
document.mySpeedY = 0;
function myAuto(){
if(parseInt(document.getElementById('move1').style.left) > window.innerWidth - document.getElementById('move1').width){
document.mySpeedX *= -1
}
document.getElementById('move1').style.left = parseInt(document.getElementById('move1').style.left)+document.mySpeedX+'px'
document.getElementById('move1').style.top = parseInt(document.getElementById('move1').style.top)+document.mySpeedY+'px'
}
function myGunPrep(){
document.getElementById('bullet1').style.visibility = 'visible'
document.getElementById('bullet1').style.left = document.getElementById('move1').style.left
document.getElementById('bullet1').style.top = document.getElementById('move1').style.top
clearInterval(document.myShot)
document.myShot = setInterval('myGun()', 30) // calls the function every 30 mille seconds
}
function myGun(){
document.getElementById('bullet1').style.left = parseInt(document.getElementById('bullet1').style.left) + 20 + 'px'
}
</script>
</head>
<!-- ******************** Here the webpage begins ************************** -->
<!-- ******************** onkeypress just for webpages is useless on mobile apps ************************** -->
<body background="myBackground01.jpg" onload="myTimer = setInterval('myScroll()', 100)" onkeypress="{
if(event.keyCode==97){document.mySpeedX += -4} // small a key
if(event.keyCode==119){document.mySpeedY += 6} // small w key
if(event.keyCode==100){alert(you typed the letter d)} // small d key
}">
<script> // This object must be after the body tag
myBgObject = eval('document.body');
</script>
<h2 align=center style="background-color:yellow"> Game Base by Fred Your Name Here ___</h2>
<!-- ******************** Some instructions that magically disappear ************************** -->
<div id="myInstructions" onclick="document.getElementById('myInstructions').style.visibility = 'hidden'" style="visibility:visible; width:500px; background-color:yellow">
<ol>Instructions here:
<li> Make you own game
<li> For this demonstration. click the buttons and the red box
<li> Delete the buttons you do not want in your game.
<li> Look at the code for each button to see how to make buttons for other directions
</ol>
Click to hide.
</div><br>
<!-- ******************** Following should be all your images ************************** -->
<img id="move1" src="myImgNew.jpg" style="position:absolute; width:30px; height:30px; left:30px; top:250px" onClick="myGunPrep()">
<img id="move2" src="myImgNew.jpg" style="position:absolute; width:30px; height:30px; left:500px; top:240px;"/>
<img id="move3" src="myImgNew.jpg" style="position:absolute; width:30px; height:30px; left:600px; top:240px;"/>
<input type=button value="Fire" onClick="myGunPrep()">
<img id="bullet1" src="myImgNew.jpg" style="position:absolute; width:10px; height:10px; left:500px; top:240px; visibility:hidden"/>
<!-- ******************** This is the silly little dot the main object hits ************************** -->
<h1 style="position:absolute;left:200px;top:230px;"><font color=red>.</font></h1>
<!-- ******************** Now all the buttons. Note: ontouchstart is faster than onclick ************************** -->
<input type=button value="BG Faster Down" onClick="myBgSpeedYdown += 1">
<input type=button value="Bg Faster Right" onClick="myBgSpeedXright += 1">
<input type=button value="Step Right" onclick="{
document.getElementById('move1').style.left = parseInt(document.getElementById('move1').style.left)+5+'px'
checkAll()
}">
<input type=button value="touch event Right" ontouchstart="{
document.getElementById('move1').style.left = parseInt(document.getElementById('move1').style.left)+5+'px'
checkAll()
}">
<input type=button value="Auto Down" onClick="{
document.mySpeedY += 6
}">
<input type=button value="Auto Right" onClick="{
document.mySpeedX += 4
}">
<!-- ******************** General game output ************************** -->
<div id="myShowDiv1" style="width:300px; background-color:yellow">out 1</div>
<div id="myShowDiv2" style="width:300px; background-color:yellow">out 2</div>
<div id="myShowDiv3" style="width:300px; background-color:yellow">out 3</div>
<br>At the bottom of every page make sure you include the following button:<br>
<input type=button value="Back" style="font-size:25px" onclick="{window.history.back()}"><br><br>
</body>
</html>