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Timmy.html
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Timmy.html
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<html>
<head>
<script type="application/javascript">
var timmy;
function Timmy() {
this.canvas = document.getElementById("canvas");
this.ctx = this.canvas.getContext("2d");
this.showGrid = document.getElementById("grid");
this.showAxes = document.getElementById("axes");
this.showTicks = document.getElementById("ticks");
this.showTarget = document.getElementById("target");
this.showGhost = document.getElementById("ghost");
this.showAxes.checked = true;
this.showTarget.checked = true;
this.showGhost.checked = true;
this.showGrid.checked = false;
this.showTicks.checked = false;
this.upTarget = document.getElementById("uptarget");
this.downTarget = document.getElementById("downtarget");
this.xf0 = document.getElementById("xf0");
this.xf1 = document.getElementById("xf1");
this.xf2 = document.getElementById("xf2");
this.xf3 = document.getElementById("xf3");
this.currTarget = 1;
this.targets = [[1, 1, 0, 1],
[0, -1, 1, 0],
[2, 0, 0, 2],
[-1, 0, 0, 1],
[0.4, 0, 0, 0.4],
[1, 0, 0, -1],
[-1, 0, 0, -1],
[1, 0, 1, 1],
[2, 0, 0, 0.5],
[-1.06, -1.06, 1.06, -1.06],
[2, 0, 3, -2]];
this.xform = function() {
var width = this.canvas.width;
var height = this.canvas.height;
this.ctx.setTransform(width/20, 0, 0, -(height/20),
width/2, this.canvas.height/2);
}
this.clear = function() {
var ctx = this.ctx;
var width = this.canvas.width;
var height = this.canvas.height;
ctx.save();
ctx.setTransform(1, 0, 0, 1, 0, 0);
ctx.clearRect(0, 0, width, height);
ctx.restore();
}
this.draw = function() {
this.clear();
if (this.showGrid.checked) {
this.drawGrid();
}
if (this.showAxes.checked) {
this.drawAxes();
}
if (this.showTicks.checked) {
this.drawTicks();
}
if (this.showGhost.checked) {
this.drawTimmy(1, 0, 0, 1, "lightgray", 0.04);
}
if (this.showTarget.checked) {
this.drawTimmy(this.targets[this.currTarget][0],
this.targets[this.currTarget][1],
this.targets[this.currTarget][2],
this.targets[this.currTarget][3],
"lightblue", 0.1);
}
this.drawTimmy(this.a, this.b, this.c, this.d, "blue", 0.04);
}
this.drawLine = function(x1, y1, x2, y2) {
this.ctx.beginPath();
this.ctx.moveTo(x1, y1);
this.ctx.lineTo(x2, y2);
this.ctx.stroke();
}
this.drawGrid = function() {
this.ctx.strokeStyle = "gainsboro";
this.ctx.lineWidth = 0.04;
var i;
for (i = -9; i <= 9; i++) {
this.drawLine(i, 10, i, -10);
this.drawLine(-10, i, 10, i);
}
}
this.drawTicks = function() {
var ctx = this.ctx;
ctx.strokeStyle = "red";
ctx.lineWidth = 0.04;
var i;
for (i = -9; i <= 9; i++) {
this.drawLine(i, 0.25, i, 0);
this.drawLine(0, i, 0.25, i);
}
}
this.drawAxes = function() {
this.ctx.strokeStyle = "red";
this.ctx.lineWidth = 0.04;
this.drawLine(-10, 0, 10, 0);
this.drawLine(0, 10, 0, -10);
}
this.drawTimmy = function(a, b, c, d, ss, lw) {
this.ctx.strokeStyle = ss;
this.ctx.lineWidth = lw;
this.drawLine(0, 0, a+b, c+d);
this.drawLine(2*a, 2*c, a+b, c+d);
this.drawLine(a+b, c+d, a+3*b, c+3*d);
this.drawLine(1.5*b, 1.5*d, 2*a+2.5*b, 2*c+2.5*d);
this.drawLine(0.25*a+3*b, 0.25*c+3*d, 1.75*a+3*b, 1.75*c+3*d);
this.drawLine(1.75*a+3*b, 1.75*c+3*d, 1.75*a+4.5*b, 1.75*c+4.5*d);
this.drawLine(1.75*a+4.5*b, 1.75*c+4.5*d, 0.25*a+4.5*b, 0.25*c+4.5*d);
this.drawLine(0.25*a+4.5*b, 0.25*c+4.5*d, 0.25*a+3*b, 0.25*c+3*d);
}
this.moveTimmy = function() {
var newa = parseFloat(this.xf0.value);
var newb = parseFloat(this.xf1.value);
var newc = parseFloat(this.xf2.value);
var newd = parseFloat(this.xf3.value);
if (isNaN(newa) || isNaN(newb) || isNaN(newc) || isNaN(newd)) {
return;
}
this.a = newa;
this.b = newb;
this.c = newc;
this.d = newd;
this.draw();
}
this.setValues = function(a, b, c, d) {
this.xf0.value = a.toString();
this.xf1.value = b.toString();
this.xf2.value = c.toString();
this.xf3.value = d.toString();
}
this.changeTarget = function(delta) {
this.currTarget += delta;
if (this.currTarget == 0) {
this.downTarget.disabled = true;
} else {
this.downTarget.disabled = false;
}
if (this.currTarget == 10) {
this.upTarget.disabled = true;
} else {
this.upTarget.disabled = false;
}
this.setValues(1, 0, 0, 1);
this.moveTimmy();
}
this.helpMe = function() {
this.setValues(this.targets[this.currTarget][0],
this.targets[this.currTarget][1],
this.targets[this.currTarget][2],
this.targets[this.currTarget][3]);
this.moveTimmy();
}
}
function init() {
timmy = new Timmy();
timmy.setValues(1, 0, 0, 1);
timmy.xform();
timmy.moveTimmy();
timmy.changeTarget(-1);
}
</script>
<style type="text/css">
canvas { border: 1px solid black; }
</style>
<title>Timmy Two Space</title>
</head>
<body onload="init();">
<form>
<table>
<tr>
<td><input type="text" size="4" value="1" id="xf0" tabindex="1"></td>
<td><input type="text" size="4" value="0" id="xf1" tabindex="2"></td>
<td>
<button type="button" onclick="timmy.moveTimmy();">Timmy!</button>
<button type="button" id="downtarget" onclick="timmy.changeTarget(-1);">
< Previous Target
</button>
<button type="button" id="uptarget" onclick="timmy.changeTarget(1);">
Next Target >
</button>
</td>
</tr>
<tr>
<td><input type="text" size="4" value="0" id="xf2" tabindex="3"></td>
<td><input type="text" size="4" value="1" id="xf3" tabindex="4"></td>
<td>
Target<input type="checkbox" id="target" onclick="timmy.draw();">
Ghost<input type="checkbox" id="ghost" onclick="timmy.draw();">
</td>
</tr>
</table>
</form>
<canvas id="canvas" width="500" height="500"></canvas>
<form>
<button type="button" onclick="timmy.helpMe();">Surrender</button>
Grid
<input type="checkbox" id="grid" onclick="timmy.draw();">
Axes
<input type="checkbox" id="axes" onclick="timmy.draw();">
Ticks
<input type="checkbox" id="ticks" onclick="timmy.draw();">
</form>
</body>
</html>