skia2/experimental/Intersection/as.htm
caryclark@google.com f839c0359c shape ops work in progress
git-svn-id: http://skia.googlecode.com/svn/trunk@6159 2bbb7eff-a529-9590-31e7-b0007b416f81
2012-10-26 21:03:50 +00:00

489 lines
22 KiB
HTML

<html>
<head>
<div style="height:0">
<div id="quad56">
debugShowActiveSpans id=1 (366.608826,151.196014 378.803101,136.674606 398.164948,136.674606) t=0.490456543 (380.294495,140.44487) other=7 otherT=0.578520747 otherIndex=3 windSum=? windValue=1
debugShowActiveSpans id=2 (398.164948,136.674606 354.009216,208.816208) t=0 (398.164948,136.674606) other=1 otherT=1 otherIndex=4 windSum=? windValue=1
debugShowActiveSpans id=3 (354.009216,208.816208 393.291473,102.232819) t=0 (354.009216,208.816208) other=2 otherT=1 otherIndex=1 windSum=? windValue=1
debugShowActiveSpans id=3 (354.009216,208.816208 393.291473,102.232819) t=0.508945199 (374.00174,154.571106) other=6 otherT=0.598402499 otherIndex=1 windSum=? windValue=1
debugShowActiveSpans id=3 (354.009216,208.816208 393.291473,102.232819) t=0.634079491 (378.917297,141.233871) other=7 otherT=0.536512741 otherIndex=1 windSum=-1 windValue=1
debugShowActiveSpans id=5 (359.978058,136.581512 378.315979,136.581512 388.322723,149.613556) t=0.597488996 (378.917297,141.233856) other=7 otherT=0.536512973 otherIndex=2 windSum=? windValue=1
debugShowActiveSpans id=6 (388.322723,149.613556 364.390686,157.898193) t=0 (388.322723,149.613556) other=5 otherT=1 otherIndex=4 windSum=? windValue=1
debugShowActiveSpans id=6 (388.322723,149.613556 364.390686,157.898193) t=0.598402499 (374.00174,154.571106) other=3 otherT=0.508945199 otherIndex=1 windSum=? windValue=1
debugShowActiveSpans id=7 (364.390686,157.898193 375.281769,136.674606 396.039917,136.674606) t=0 (364.390686,157.898193) other=6 otherT=1 otherIndex=2 windSum=? windValue=1
debugShowActiveSpans id=7 (364.390686,157.898193 375.281769,136.674606 396.039917,136.674606) t=0.536512741 (378.917297,141.233871) other=3 otherT=0.634079491 otherIndex=2 windSum=? windValue=1
debugShowActiveSpans id=7 (364.390686,157.898193 375.281769,136.674606 396.039917,136.674606) t=0.536512973 (378.917297,141.233856) other=5 otherT=0.597488996 otherIndex=3 windSum=-1 windValue=1
</div>
<div id="quad57c">
debugShowActiveSpans id=1 (303.12088,141.299606 330.463562,217.659027) t=0.845414865 (326.236786,205.854996) other=13 otherT=0.999999913 otherIndex=3 windSum=? windValue=1
debugShowActiveSpans id=2 (330.463562,217.659027 358.606506,141.299606) t=-0 (330.463562,217.659027) other=1 otherT=1 otherIndex=3 windSum=? windValue=1
debugShowActiveSpans id=2 (330.463562,217.659027 358.606506,141.299606) t=0.154585135 (334.814056,205.854996) other=13 otherT=0.812241055 otherIndex=2 windSum=? windValue=1
debugShowActiveSpans id=2 (330.463562,217.659027 358.606506,141.299606) t=0.283842806 (338.451721,195.984955) other=16 otherT=0.363593784 otherIndex=1 windSum=? windValue=1
debugShowActiveSpans id=4 (362.874634,159.705902 335.665344,233.397751) t=0.379109438 (352.559326,187.643173) other=17 otherT=0.412818074 otherIndex=1 windSum=? windValue=1
debugShowActiveSpans id=13 (371.919067,205.854996 326.236786,205.854996) t=0.812241055 (334.814056,205.854996) other=2 otherT=0.154585135 otherIndex=1 windSum=? windValue=1
debugShowActiveSpans id=14 (326.236786,205.854996 329.104431,231.663818 351.512085,231.663818) t=0.962138429 (349.843323,231.626816) other=15 otherT=0.0583966647 otherIndex=1 windSum=1 windValue=1
debugShowActiveSpans id=15 (351.512085,231.663818 322.935669,231.030273) t=0 (351.512085,231.663818) other=14 otherT=1 otherIndex=3 windSum=1 windValue=1
debugShowActiveSpans id=16 (326.837006,195.984955 358.78125,195.984955) t=0 (326.837006,195.984955) other=18 otherT=1 otherIndex=1 windSum=? windValue=1
debugShowActiveSpans id=16 (326.837006,195.984955 358.78125,195.984955) t=0.363593784 (338.451721,195.984955) other=2 otherT=0.283842806 otherIndex=2 windSum=? windValue=1
debugShowActiveSpans id=16 (326.837006,195.984955 358.78125,195.984955) t=0.708806554 (349.479309,195.984955) other=4 otherT=0.492307539 otherIndex=3 windSum=? windValue=1
debugShowActiveSpans id=17 (358.78125,195.984955 343.709442,175.778046) t=-0 (358.78125,195.984955) other=16 otherT=1 otherIndex=3 windSum=? windValue=1
debugShowActiveSpans id=17 (358.78125,195.984955 343.709442,175.778046) t=0.412818074 (352.559326,187.643173) other=4 otherT=0.379109438 otherIndex=2 windSum=? windValue=1
debugShowActiveSpans id=17 (358.78125,195.984955 343.709442,175.778046) t=0.902761903 (345.174988,177.74292) other=2 otherT=0.522739691 otherIndex=3 windSum=? windValue=1
debugShowActiveSpans id=18 (343.709442,175.778046 328.570923,175.778046 326.837006,195.984955) t=0 (343.709442,175.778046) other=17 otherT=1 otherIndex=3 windSum=? windValue=1
</div>
<div id="quad57b">
debugShowActiveSpans id=1 (303.12088,141.299606 330.463562,217.659027) t=0.845414865 (326.236786,205.854996) other=13 otherT=0.999999913 otherIndex=3 windSum=1 windValue=1
debugShowActiveSpans id=2 (330.463562,217.659027 358.606506,141.299606) t=-0 (330.463562,217.659027) other=1 otherT=1 otherIndex=3 windSum=? windValue=1
debugShowActiveSpans id=2 (330.463562,217.659027 358.606506,141.299606) t=0.154585135 (334.814056,205.854996) other=13 otherT=0.812241055 otherIndex=2 windSum=? windValue=1
debugShowActiveSpans id=2 (330.463562,217.659027 358.606506,141.299606) t=0.283842806 (338.451721,195.984955) other=16 otherT=0.363593784 otherIndex=1 windSum=? windValue=1
debugShowActiveSpans id=4 (362.874634,159.705902 335.665344,233.397751) t=0.379109438 (352.559326,187.643173) other=17 otherT=0.412818074 otherIndex=1 windSum=? windValue=1
debugShowActiveSpans id=13 (371.919067,205.854996 326.236786,205.854996) t=0.812241055 (334.814056,205.854996) other=2 otherT=0.154585135 otherIndex=1 windSum=? windValue=1
debugShowActiveSpans id=16 (326.837006,195.984955 358.78125,195.984955) t=0 (326.837006,195.984955) other=18 otherT=1 otherIndex=1 windSum=? windValue=1
debugShowActiveSpans id=16 (326.837006,195.984955 358.78125,195.984955) t=0.363593784 (338.451721,195.984955) other=2 otherT=0.283842806 otherIndex=2 windSum=? windValue=1
debugShowActiveSpans id=16 (326.837006,195.984955 358.78125,195.984955) t=0.708806554 (349.479309,195.984955) other=4 otherT=0.492307539 otherIndex=3 windSum=? windValue=1
debugShowActiveSpans id=17 (358.78125,195.984955 343.709442,175.778046) t=-0 (358.78125,195.984955) other=16 otherT=1 otherIndex=3 windSum=? windValue=1
debugShowActiveSpans id=17 (358.78125,195.984955 343.709442,175.778046) t=0.412818074 (352.559326,187.643173) other=4 otherT=0.379109438 otherIndex=2 windSum=? windValue=1
debugShowActiveSpans id=17 (358.78125,195.984955 343.709442,175.778046) t=0.902761903 (345.174988,177.74292) other=2 otherT=0.522739691 otherIndex=3 windSum=? windValue=1
debugShowActiveSpans id=18 (343.709442,175.778046 328.570923,175.778046 326.837006,195.984955) t=0 (343.709442,175.778046) other=17 otherT=1 otherIndex=3 windSum=? windValue=1
</div>
<div id="quad57a">
debugShowActiveSpans id=2 (330.463562,217.659027 358.606506,141.299606) t=0.154585135 (334.814056,205.854996) other=13 otherT=0.812241055 otherIndex=2 windSum=-1 windValue=1
debugShowActiveSpans id=2 (330.463562,217.659027 358.606506,141.299606) t=0.283842806 (338.451721,195.984955) other=16 otherT=0.363593784 otherIndex=1 windSum=? windValue=1
debugShowActiveSpans id=4 (362.874634,159.705902 335.665344,233.397751) t=0.379109438 (352.559326,187.643173) other=17 otherT=0.412818074 otherIndex=1 windSum=? windValue=1
debugShowActiveSpans id=16 (326.837006,195.984955 358.78125,195.984955) t=0 (326.837006,195.984955) other=18 otherT=1 otherIndex=1 windSum=? windValue=1
debugShowActiveSpans id=16 (326.837006,195.984955 358.78125,195.984955) t=0.363593784 (338.451721,195.984955) other=2 otherT=0.283842806 otherIndex=2 windSum=? windValue=1
debugShowActiveSpans id=16 (326.837006,195.984955 358.78125,195.984955) t=0.708806554 (349.479309,195.984955) other=4 otherT=0.492307539 otherIndex=3 windSum=? windValue=1
debugShowActiveSpans id=17 (358.78125,195.984955 343.709442,175.778046) t=-0 (358.78125,195.984955) other=16 otherT=1 otherIndex=3 windSum=? windValue=1
debugShowActiveSpans id=17 (358.78125,195.984955 343.709442,175.778046) t=0.412818074 (352.559326,187.643173) other=4 otherT=0.379109438 otherIndex=2 windSum=? windValue=1
debugShowActiveSpans id=17 (358.78125,195.984955 343.709442,175.778046) t=0.902761903 (345.174988,177.74292) other=2 otherT=0.522739691 otherIndex=3 windSum=? windValue=1
debugShowActiveSpans id=18 (343.709442,175.778046 328.570923,175.778046 326.837006,195.984955) t=0 (343.709442,175.778046) other=17 otherT=1 otherIndex=3 windSum=? windValue=1
</div>
<div id="quad58b">
debugShowActiveSpans id=3 (303.12088,141.299606 330.463562,217.659027) t=0.845414865 (326.236786,205.854996) other=16 otherT=0.999999913 otherIndex=3 windSum=1 windValue=1
debugShowActiveSpans id=4 (330.463562,217.659027 358.606506,141.299606) t=-0 (330.463562,217.659027) other=3 otherT=1 otherIndex=3 windSum=? windValue=1
debugShowActiveSpans id=4 (330.463562,217.659027 358.606506,141.299606) t=0.154585135 (334.814056,205.854996) other=16 otherT=0.812241055 otherIndex=2 windSum=? windValue=1
debugShowActiveSpans id=4 (330.463562,217.659027 358.606506,141.299606) t=0.283842806 (338.451721,195.984955) other=19 otherT=0.363593784 otherIndex=1 windSum=? windValue=1
debugShowActiveSpans id=6 (362.874634,159.705902 335.665344,233.397751) t=0.287405665 (355.054535,180.885361) other=20 otherT=0.497256785 otherIndex=1 windSum=? windValue=1
debugShowActiveSpans id=16 (371.919067,205.854996 326.236786,205.854996) t=0.812241055 (334.814056,205.854996) other=4 otherT=0.154585135 otherIndex=1 windSum=? windValue=1
debugShowActiveSpans id=19 (326.837006,195.984955 358.78125,195.984955) t=0 (326.837006,195.984955) other=21 otherT=1 otherIndex=1 windSum=? windValue=1
debugShowActiveSpans id=19 (326.837006,195.984955 358.78125,195.984955) t=0.363593784 (338.451721,195.984955) other=4 otherT=0.283842806 otherIndex=2 windSum=? windValue=1
debugShowActiveSpans id=19 (326.837006,195.984955 358.78125,195.984955) t=0.708806554 (349.479309,195.984955) other=6 otherT=0.492307539 otherIndex=3 windSum=? windValue=1
debugShowActiveSpans id=20 (358.78125,195.984955 358.78125,175.778046 343.709442,175.778046) t=0 (358.78125,195.984955) other=19 otherT=1 otherIndex=3 windSum=? windValue=1
debugShowActiveSpans id=20 (358.78125,195.984955 358.78125,175.778046 343.709442,175.778046) t=0.497256785 (355.054535,180.885361) other=6 otherT=0.287405665 otherIndex=2 windSum=? windValue=1
debugShowActiveSpans id=20 (358.78125,195.984955 358.78125,175.778046 343.709442,175.778046) t=0.925970638 (345.858368,175.888794) other=4 otherT=0.547021444 otherIndex=3 windSum=? windValue=1
debugShowActiveSpans id=21 (343.709442,175.778046 328.570923,175.778046 326.837006,195.984955) t=0 (343.709442,175.778046) other=20 otherT=1 otherIndex=3 windSum=? windValue=1
</div>
<div id="quad58a">
debugShowActiveSpans id=4 (330.463562,217.659027 358.606506,141.299606) t=0.154585135 (334.814056,205.854996) other=16 otherT=0.812241055 otherIndex=2 windSum=-1 windValue=1
debugShowActiveSpans id=4 (330.463562,217.659027 358.606506,141.299606) t=0.283842806 (338.451721,195.984955) other=19 otherT=0.363593784 otherIndex=1 windSum=? windValue=1
debugShowActiveSpans id=6 (362.874634,159.705902 335.665344,233.397751) t=0.287405665 (355.054535,180.885361) other=20 otherT=0.497256785 otherIndex=1 windSum=? windValue=1
debugShowActiveSpans id=19 (326.837006,195.984955 358.78125,195.984955) t=0 (326.837006,195.984955) other=21 otherT=1 otherIndex=1 windSum=? windValue=1
debugShowActiveSpans id=19 (326.837006,195.984955 358.78125,195.984955) t=0.363593784 (338.451721,195.984955) other=4 otherT=0.283842806 otherIndex=2 windSum=? windValue=1
debugShowActiveSpans id=19 (326.837006,195.984955 358.78125,195.984955) t=0.708806554 (349.479309,195.984955) other=6 otherT=0.492307539 otherIndex=3 windSum=? windValue=1
debugShowActiveSpans id=20 (358.78125,195.984955 358.78125,175.778046 343.709442,175.778046) t=0 (358.78125,195.984955) other=19 otherT=1 otherIndex=3 windSum=? windValue=1
debugShowActiveSpans id=20 (358.78125,195.984955 358.78125,175.778046 343.709442,175.778046) t=0.497256785 (355.054535,180.885361) other=6 otherT=0.287405665 otherIndex=2 windSum=? windValue=1
debugShowActiveSpans id=20 (358.78125,195.984955 358.78125,175.778046 343.709442,175.778046) t=0.925970638 (345.858368,175.888794) other=4 otherT=0.547021444 otherIndex=3 windSum=? windValue=1
debugShowActiveSpans id=21 (343.709442,175.778046 328.570923,175.778046 326.837006,195.984955) t=0 (343.709442,175.778046) other=20 otherT=1 otherIndex=3 windSum=? windValue=1
</div>
</div>
<script type="text/javascript">
var testDivs = [
quad58b,
quad58a,
quad57c,
quad57b,
quad57a,
quad56,
];
var decimal_places = 3; // make this 3 to show more precision
var tests = [];
var testTitles = [];
var testIndex = 0;
var ctx;
var xmin;
var ymin;
var scale;
var mouseX, mouseY;
var srcLeft, srcTop;
var srcWidth, srcHeight;
var screenWidth, screenHeight;
var drawnPts;
var ptLabels = true;
var digit_mode = false;
var index_mode = true;
var index_bits = -1;
var debug_xy = false;
var info_mode = false;
var intersect_mode = false;
var sequence = -1;
var SPAN_ID = 1;
var SPAN_X1 = 2;
var SPAN_Y1 = 3;
var SPAN_X2 = 4;
var SPAN_Y2 = 5;
var SPAN_L_T = 6;
var SPAN_L_TX = 7;
var SPAN_L_TY = 8;
var SPAN_L_OTHER = 9;
var SPAN_L_OTHERT = 10;
var SPAN_L_OTHERI = 11;
var SPAN_L_SUM = 12;
var SPAN_L_VAL = 13;
var SPAN_X3 = 6;
var SPAN_Y3 = 7;
var SPAN_Q_T = 8;
var SPAN_Q_TX = 9;
var SPAN_Q_TY = 10;
var SPAN_Q_OTHER = 11;
var SPAN_Q_OTHERT = 12;
var SPAN_Q_OTHERI = 13;
var SPAN_Q_SUM = 14;
var SPAN_Q_VAL = 15;
var Q_LENGTH = 18;
function strs_to_nums(strs) {
var result = [];
for (var idx in strs) {
var str = strs[idx];
var num = parseFloat(str);
if (isNaN(num)) {
result.push(str);
} else {
result.push(num);
}
}
return result;
}
function parse_debugShowActiveSpans(test, title) {
var re_quad = / id=(\d+) \((\d+\.?\d*),(\d+\.?\d*) (\d+\.?\d*),(\d+\.?\d*) (\d+\.?\d*),(\d+\.?\d*)\) t=(\d+\.?\d*) \((\d+\.?\d*),(\d+\.?\d*)\) other=(\d+) otherT=(\d+\.?\d*) otherIndex=(\d+) windSum=(\?|-?\d+) windValue=(\d+)/;
var re_line = / id=(\d+) \((\d+\.?\d*),(\d+\.?\d*) (\d+\.?\d*),(\d+\.?\d*)\) t=(\d+\.?\d*) \((\d+\.?\d*),(\d+\.?\d*)\) other=(\d+) otherT=(\d+\.?\d*) otherIndex=(\d+) windSum=(\?|-?\d+) windValue=(\d+)/;
var strs = test.split("debugShowActiveSpans");
if (strs.length == 1)
return;
var spans = [];
for (var s in strs) {
var str = strs[s];
if (str == "\n") {
continue;
}
if (re_line.test(str)) {
var lineStrs = re_line.exec(str);
var line = strs_to_nums(lineStrs);
spans.push(line);
} else if (re_quad.test(str)) {
var quadStrs = re_quad.exec(str);
var quad = strs_to_nums(quadStrs);
spans.push(quad);
}
}
if (spans.length >= 1) {
tests.push(spans);
testTitles.push(title);
}
}
function init(test) {
var canvas = document.getElementById('canvas');
if (!canvas.getContext) return;
screenWidth = canvas.width = window.innerWidth - 20;
screenHeight = canvas.height = window.innerHeight - 20;
ctx = canvas.getContext('2d');
xmin = Infinity;
var xmax = -Infinity;
ymin = Infinity;
var ymax = -Infinity;
for (var scans in test) {
var scan = test[scans];
var last = scan.length >= Q_LENGTH ? SPAN_X3 : SPAN_X2;
for (var idx = SPAN_X1; idx <= last; idx += 2) {
xmin = Math.min(xmin, scan[idx]);
xmax = Math.max(xmax, scan[idx]);
ymin = Math.min(ymin, scan[idx + 1]);
ymax = Math.max(ymax, scan[idx + 1]);
}
}
srcWidth = xmax - xmin;
srcHeight = ymax - ymin;
var hscale = ctx.canvas.width / srcWidth;
var vscale = ctx.canvas.height / srcHeight;
var minScale = Math.min(hscale, vscale);
scale = minScale;
srcLeft = xmin;
srcTop = ymin;
}
function drawPoint(px, py) {
for (var pts = 0; pts < drawnPts.length; pts += 2) {
var x = drawnPts[pts];
var y = drawnPts[pts + 1];
if (px == x && py == y) {
return;
}
}
drawnPts.push(px);
drawnPts.push(py);
var label = px.toFixed(decimal_places) + ", " + py.toFixed(decimal_places);
var _px = (px - srcLeft)* scale;
var _py = (py - srcTop) * scale;
ctx.beginPath();
ctx.arc(_px, _py, 3, 0, Math.PI*2, true);
ctx.closePath();
ctx.fill();
ctx.fillText(label, _px + 5, _py);
}
function draw(test, title) {
ctx.fillStyle = "rgba(0,0,0, 0.1)";
ctx.font = "normal 50px Arial";
ctx.fillText(title, 50, 50);
ctx.font = "normal 10px Arial";
ctx.lineWidth = "1.001"; "0.999";
var id = -1;
var firstIdx;
var lastIdx;
var index_tst = -1;
drawnPts = [];
for (var scansStr in test) {
var scans = parseInt(scansStr);
var scan = test[scans];
var isQuad = scan.length >= Q_LENGTH;
if (id != scan[SPAN_ID]) {
id = scan[SPAN_ID];
firstIdx = lastIdx = scans;
++index_tst;
var nextIdx = lastIdx + 1;
while (nextIdx < test.length && test[nextIdx][SPAN_ID] == id) {
lastIdx = nextIdx++;
}
}
var seq = sequence % test.length;
var selected = sequence >= 0 ? seq == scans
: (index_bits & (1 << index_tst)) != 0 && scans == firstIdx;
var skippable = (sequence >= 0 && seq >= firstIdx && seq <= lastIdx)
|| scans != firstIdx;
if (skippable && !selected) {
continue;
}
ctx.strokeStyle = selected ? "red" : "rgba(0,0,0, 0.2)";
ctx.beginPath();
ctx.moveTo((scan[SPAN_X1] - srcLeft)* scale,
(scan[SPAN_Y1] - srcTop) * scale);
if (isQuad) {
ctx.quadraticCurveTo((scan[SPAN_X2] - srcLeft) * scale,
(scan[SPAN_Y2] - srcTop) * scale,
(scan[SPAN_X3] - srcLeft) * scale,
(scan[SPAN_Y3] - srcTop) * scale);
} else {
ctx.lineTo((scan[SPAN_X2] - srcLeft)* scale,
(scan[SPAN_Y2] - srcTop) * scale);
}
ctx.stroke();
if (debug_xy && selected) {
var debugText = "";
for (var idx = SPAN_X1; idx <= (isQuad ? SPAN_X3 : SPAN_X2); idx += 2) {
var screenX = (scan[idx] - srcLeft) * scale;
var screenY = (scan[idx + 1] - srcTop) * scale;
debugText += screenX.toFixed(decimal_places) + ", ";
debugText += screenY.toFixed(decimal_places) + " ";
}
ctx.fillStyle="blue";
ctx.fillText(debugText, 50, scans * 50 + 100);
}
if (ptLabels && selected) {
ctx.fillStyle="blue";
drawPoint(scan[SPAN_X1], scan[SPAN_Y1]);
drawPoint(scan[SPAN_X2], scan[SPAN_Y2]);
if (scan.length >= Q_LENGTH) {
drawPoint(scan[SPAN_X3], scan[SPAN_Y3]);
}
}
if (info_mode && selected) {
var infoText = "id=" + scan[SPAN_ID];
ctx.fillStyle="green";
ctx.fillText(infoText, 10, scans * 50 + 100);
}
if (intersect_mode && selected) {
ctx.fillStyle="rgba(50,100,200, 1.0)";
if (isQuad) {
drawPoint(scan[SPAN_Q_TX], scan[SPAN_Q_TY]);
} else {
drawPoint(scan[SPAN_L_TX], scan[SPAN_L_TY]);
}
}
}
}
function drawTop() {
init(tests[testIndex]);
redraw();
}
function redraw() {
ctx.beginPath();
ctx.rect(0, 0, ctx.canvas.width, ctx.canvas.height);
ctx.fillStyle="white";
ctx.fill();
draw(tests[testIndex], testTitles[testIndex]);
}
function doKeyPress(evt) {
var char = String.fromCharCode(evt.charCode);
switch (char) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
if (digit_mode) {
decimal_places = char - '0';
} else if (index_mode) {
index_bits ^= 1 << (char - '0');
}
redraw();
break;
case 'd':
digit_mode = true;
index_mode = false;
break;
case 'f':
info_mode ^= true;
redraw();
break;
case 'i':
digit_mode = false;
if (sequence >= 0) {
sequence = -1;
index_mode = false;
} else {
index_mode ^= true;
}
if (index_mode) {
index_bits = 0;
} else {
index_bits = -1;
}
redraw();
break;
case 'N':
testIndex += 9;
case 'n':
if (++testIndex >= tests.length)
testIndex = 0;
drawTop();
break;
case 'P':
testIndex -= 9;
case 'p':
if (--testIndex < 0)
testIndex = tests.length - 1;
drawTop();
break;
case 's':
sequence++;
drawTop();
break;
case 't':
intersect_mode ^= true;
redraw();
break;
case 'x':
ptLabels ^= true;
redraw();
break;
case 'y':
debug_xy ^= true;
redraw();
break;
case '-':
scale /= 2;
calcLeftTop();
redraw();
break;
case '=':
case '+':
scale *= 2;
calcLeftTop();
redraw();
break;
}
}
function calcXY() {
var e = window.event;
var tgt = e.target || e.srcElement;
var left = tgt.offsetLeft;
var top = tgt.offsetTop;
var unit = scale;
mouseX = (e.clientX - left) / scale + srcLeft;
mouseY = (e.clientY - top) / scale + srcTop;
}
function calcLeftTop() {
srcLeft = mouseX - screenWidth / 2 / scale;
srcTop = mouseY - screenHeight / 2 / scale;
}
function handleMouseClick() {
calcXY();
calcLeftTop();
redraw();
}
function handleMouseOver() {
calcXY();
var num = mouseX.toFixed(decimal_places) + ", " + mouseY.toFixed(decimal_places);
ctx.beginPath();
ctx.rect(300,100,200,10);
ctx.fillStyle="white";
ctx.fill();
ctx.fillStyle="black";
ctx.fillText(num, 300, 108);
}
function start() {
for (i = 0; i < testDivs.length; ++i) {
var title = testDivs[i].id.toString();
var str = testDivs[i].firstChild.data;
parse_debugShowActiveSpans(str, title);
}
drawTop();
window.addEventListener('keypress', doKeyPress, true);
window.onresize = function() {
drawTop();
}
}
</script>
</head>
<body onLoad="start();">
<canvas id="canvas" width="750" height="500"
onmousemove="handleMouseOver()"
onclick="handleMouseClick()"
></canvas >
</body>
</html>