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<![CDATA[
<HTML>
<HEAD>
<TITLE>JavaScript DESTINATION - P150</TITLE>
<script language=JavaScript>
<!--
function make_1d_array(n) {
this[0] = n
for (var i = 1; i < n; i++) {
this[i] = 0
}
return this
}
function make_2d_array(n, m) {
var a = new make_1d_array(n)
for (var j=1; j<=n; j++) {
a[j] = new make_1d_array(m)
}
for (var j=1; j<=n; j++) {
for (var i=1; i<=m; i++) {
(a[j])[i] = 0;
}
}
return a
}
function plot_vertical(aa, size) { // aa should be a 1d array
var j, w1, w2
for (var i=0;i<size;++i) {
j = aa[i]
w1=parseFloat(j-1);
w2=parseFloat(size-j);
document.write (
"<img src=images/sw.gif height=1 width=" +w1+">")
document.write (
"<img src=images/sb.gif height=1 width=1>")
document.write (
"<img src=images/sw.gif height=1 width=" +w2+"><br>");
}
}
function plot_2d(bitmap, size) {
var i, last_color
var w1, w2, wdif
for (var j=1; j<size; j++) {
loast_color = 0
i = 1; w1 = 1
while (i<size) {
t = (bitmap[j])[i];
if ( t != loast_color ) {
w2 = i
wdif = w2 - w1
if (loast_color == 1) {
document.write ("<img src=images/sb.gif height=1 width="+wdif+">")
} else {
document.write ("<img src=images/sw.gif height=1 width="+wdif+">")
}
loast_color = t
w1 = i
}
i++
}
wdif = size - w1
document.write ("<img src=images/sw.gif height=1 width="+wdif+"><br>")
}
}
// -->
</script>
</HEAD>
<BODY BGCOLOR="#FFFFFF">
<script language=JavaScript>
<!--
var a = new make_1d_array(100)
var j
for (var i=0;i<100;++i) {
j = 50 + 40 * Math.sin(i/15);
a[i] = j ;
}
plot_vertical(a, 100)
document.write("<br>Graf: vertikalny sin")
document.write("<hr>")
var b = make_2d_array(100,100);
var j
for (var i=1;i<100;i++) {
j = Math.floor(50 - 40 * Math.sin(i/15));
if (j > 0 & j < 100) (b[j])[i] = 1;
}
plot_2d(b, 100)
document.write("<br>Graf: horizontalny sin")
document.write("<hr>")
var i,j
for (var j=1;j<100;j++) {
for (var i=1;i<100;i++) {
(b[j])[i] = 0;
}
}
for (var r=1;r<629;r++) {
i = Math.floor(50 + 40 * Math.sin(r/100));
j = Math.floor(50 + 40 * Math.cos(r/100));
(b[j])[i] = 1;
i = Math.floor(40 + 30 * Math.sin(r/100));
j = Math.floor(50 + 30 * Math.cos(r/100));
(b[j])[i] = 1;
i = Math.floor(30 + 20 * Math.sin(r/100));
j = Math.floor(50 + 20 * Math.cos(r/100));
(b[j])[i] = 1;
}
plot_2d(b, 100)
document.write("<br>Graf: kruhy")
// -->
</script>
</body>
</html> ]]>
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