gGLMapCanvas.getContext("experimental-webgl", {depth: false});
}
catch(e) {}
- // If we don't have a GL context, give up now
if (!gMap.gl) {
+ // If we don't have a GL context, give up now
showGLWarningDialog();
gMap.gl = null;
}
+ else {
+ // GL context can be lost at any time, handle that.
+ // See http://www.khronos.org/webgl/wiki/HandlingContextLost
+ gGLMapCanvas.addEventListener("webglcontextlost",
+ gMap.handleContextLost, false);
+ gGLMapCanvas.addEventListener("webglcontextrestored",
+ gMap.handleContextRestored, false);
+ }
gTrackCanvas = document.getElementById("track");
gTrackContext = gTrackCanvas.getContext("2d");
if (!gMap.activeMap)
document.getElementById("body").addEventListener("keydown", mapEvHandler, false);
+ document.addEventListener("visibilitychange", visibilityEvHandler, false);
+
console.log("Events added.");
document.getElementById("copyright").innerHTML =
gMapStyles[gMap.activeMap].copyright;
if (aTPoint) {
// Add in front and return new length.
var tracklen = gTrack.unshift(aTPoint);
- // Redraw track periodically, larger distance the longer it gets.
+ // Redraw track periodically, larger distance the longer it gets
+ // (but clamped to the first value over a certain limit).
// Initial paint will do initial track drawing.
if (tracklen % redrawBase == 0) {
drawTrack();
- redrawBase = tracklen;
+ if (redrawBase < 1000) {
+ redrawBase = tracklen;
+ }
}
}
else {
gMap.glTxCleanIntervalID = window.setInterval(gMap.cleanTextures, 30 * 1000);
}
- var throwEv = new CustomEvent("mapinit-done");
- gAction.dispatchEvent(throwEv);
+ if (!gAppInitDone) {
+ // We may be called when context was lost and destroyed,
+ // only send event when we are in app startup
+ // (gAppInitDone is set to true right after we return this event).
+ var throwEv = new CustomEvent("mapinit-done");
+ gAction.dispatchEvent(throwEv);
+ }
},
draw: function() {
var imgObj = new Image();
imgObj.onload = function() {
gMap.loadImageToTexture(imgObj, aTileKey);
- window.requestAnimationFrame(function(aTimestamp) { gMap.drawGL() });
+ if (document.hidden != true) { // Only draw if we're actually visible.
+ window.requestAnimationFrame(function(aTimestamp) { gMap.drawGL() });
+ }
URL.revokeObjectURL(imgURL);
}
imgObj.src = imgURL;
}
}
}
- window.requestAnimationFrame(function(aTimestamp) { gMap.drawGL() });
+ if (document.hidden != true) { // Only draw if we're actually visible.
+ window.requestAnimationFrame(function(aTimestamp) { gMap.drawGL() });
+ }
},
drawGL: function() {
y: Math.ceil((gMap.pos.y + gMap.baseDim.ht / 2) / gMap.baseDim.tsize) + 1,
z: gMap.pos.z});
console.log("In range: " + tMin.x + "," + tMin.y + "," + tMin.z + " - " + tMax.x + "," + tMax.y + "," + tMax.z);
- for (aTileKey in gMap.glTextures) {
- var keyMatches = aTileKey.match(/([^:]+)::(\d+),(\d+),(\d+)/);
+ for (var tileKey in gMap.glTextures) {
+ var keyMatches = tileKey.match(/([^:]+)::(\d+),(\d+),(\d+)/);
if (keyMatches && keyMatches[1] != "loading") {
var txData = {
style: keyMatches[1],
}
if (delTx) {
// Delete texture from GL and from the array we are holding.
- gMap.gl.deleteTexture(gMap.glTextures[aTileKey]);
- delete gMap.glTextures[aTileKey];
+ gMap.gl.deleteTexture(gMap.glTextures[tileKey]);
+ delete gMap.glTextures[tileKey];
}
}
}
console.log("Cleaning complete, " + Object.keys(gMap.glTextures).length + " textures left)");
- //clearInterval(gMap.glTxCleanIntervalID);
}
},
+
+ handleContextLost: function(event) {
+ event.preventDefault();
+ // GL context is gone, let's reset everything that depends on it.
+ clearInterval(gMap.glTxCleanIntervalID);
+ gMap.glTextures = {};
+ },
+
+ handleContextRestored: function(event) {
+ // When GL context is back, init GL again and draw.
+ gMap.initGL();
+ gMap.draw();
+ },
}
// Using scale(x, y) together with drawing old data on scaled canvas would be an improvement for zooming.
}
function drawTrack() {
- gLastDrawnPoint = null;
- gCurPosMapCache = undefined;
- gTrackContext.clearRect(0, 0, gTrackCanvas.width, gTrackCanvas.height);
- if (gTrack.length) {
- for (var i = 0; i < gTrack.length; i++) {
- drawTrackPoint(gTrack[i].coords.latitude, gTrack[i].coords.longitude,
- (i + 1 >= gTrack.length));
+ if (gTrackContext && (document.hidden != true)) { // Only draw if we're actually visible.
+ gLastDrawnPoint = null;
+ gCurPosMapCache = undefined;
+ gTrackContext.clearRect(0, 0, gTrackCanvas.width, gTrackCanvas.height);
+ if (gTrack.length) {
+ for (var i = 0; i < gTrack.length; i++) {
+ drawTrackPoint(gTrack[i].coords.latitude, gTrack[i].coords.longitude,
+ (i + 1 >= gTrack.length));
+ }
}
}
}
}
}
+function calcTrackDuration() {
+ // Get the duration of the track in s.
+ var tDuration = 0;
+ if (gTrack.length > 1) {
+ for (var i = 1; i < gTrack.length; i++) {
+ if (!gTrack[i].beginSegment) {
+ tDuration += (gTrack[i].time - gTrack[i-1].time);
+ }
+ }
+ }
+ return Math.round(tDuration / 1000); // The timestamps are in ms but we return seconds.
+}
+
+function calcTrackLength() {
+ // Get the length of the track in km.
+ var tLength = 0;
+ if (gTrack.length > 1) {
+ for (var i = 1; i < gTrack.length; i++) {
+ if (!gTrack[i].beginSegment) {
+ tLength += getPointDistance(gTrack[i-1].coords, gTrack[i].coords);
+ }
+ }
+ }
+ return tLength;
+}
+
+function getPointDistance(aGPSPoint1, aGPSPoint2) {
+ // Get the distance in km between the two given GPS points.
+ // See http://stackoverflow.com/questions/365826/calculate-distance-between-2-gps-coordinates
+ // Earth is almost exactly a sphere and we calculate small distances on the surface, so we can do spherical great-circle math.
+ // Also see http://en.wikipedia.org/wiki/Great-circle_distance
+ var R = 6371; // km
+ var dLat = deg2rad(aGPSPoint2.latitude - aGPSPoint1.latitude);
+ var dLon = deg2rad(aGPSPoint2.longitude - aGPSPoint1.longitude);
+ var lat1 = deg2rad(aGPSPoint1.latitude);
+ var lat2 = deg2rad(aGPSPoint2.latitude);
+
+ var a = Math.sin(dLat/2) * Math.sin(dLat/2) +
+ Math.sin(dLon/2) * Math.sin(dLon/2) * Math.cos(lat1) * Math.cos(lat2);
+ var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
+ return R * c;
+}
+
+function deg2rad(aDegreeValue) {
+ // Convert an angle in degrees to radiants.
+ return aDegreeValue * (Math.PI / 180);
+}
+
var mapEvHandler = {
handleEvent: function(aEvent) {
var touchEvent = aEvent.type.indexOf('touch') != -1;
}
};
+function visibilityEvHandler() {
+ // Immediately draw if we just got visible.
+ if (document.hidden != true) {
+ gMap.draw();
+ }
+ // No need to handle the event where we become invisible as we care only draw
+ // when we are visible anyhow.
+}
+
var geofake = {
tracking: false,
lastPos: {x: undefined, y: undefined},
.replace("{x}", norm.x)
.replace("{y}", norm.y)
.replace("{z}", norm.z)
- .replace("[a-c]", String.fromCharCode(97 + Math.floor(Math.random() * 2)))
- .replace("[1-4]", 1 + Math.floor(Math.random() * 3)),
+ .replace("[a-c]", String.fromCharCode(97 + Math.floor(Math.random() * 3)))
+ .replace("[1-4]", 1 + Math.floor(Math.random() * 4)),
true);
XHR.responseType = "blob";
XHR.addEventListener("load", function () {
projects / lantea.git / blobdiff