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[Plot] Amend plot updater

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Amend plot updater to correctly expose information for real-time
plotting without history, allowing removal of cache to free
memory; WTD-751.
This commit is contained in:
Victor Woeltjen 2015-01-29 11:19:22 -08:00
parent b615a3c888
commit 57f20ba110
1 changed files with 27 additions and 17 deletions
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44
platform/features/plot/src/elements/PlotUpdater.js
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@ -31,7 +31,8 @@ define(
domainOffset,
buffers = {},
lengths = {},
bufferArray;
lengthArray = [],
bufferArray = [];
function ensureBufferSize(buffer, id, index) {
// Check if we don't have enough room
@ -52,11 +53,16 @@ define(
function addData(obj) {
var id = obj.getId(),
index = lengths[id],
index = lengths[id] || 0,
buffer = buffers[id],
domainValue = subscription.getDomainValue(obj),
rangeValue = subscription.getRangeValue(obj);
if (!buffer) {
buffer = new Float32Array(INITIAL_SIZE);
buffers[id] = buffer;
}
if (domainValue !== undefined && rangeValue !== undefined &&
(index < 1 || domainValue !== buffer[index * 2 - 2])) {
// Use the first observed domain value as a domainOffset
@ -86,31 +92,28 @@ define(
var id = obj.getId(),
buffer = buffers[id],
length = lengths[id],
value = buffer[length * 2 - 2] + domainOffset;
max[0] = Math.max(value, max[0]);
min[0] = Math.min(value, min[0]);
low = buffer[0] + domainOffset,
high = buffer[length * 2 - 2] + domainOffset;
max[0] = Math.max(high, max[0]);
min[0] = Math.min(low, min[0]);
});
}
function padRange() {
// If range is empty, add some padding
if (max[1] === min[1]) {
max[1] = max[1] + 1.0;
min[1] = min[1] - 1.0;
}
}
function update() {
var objects = subscription.getTelemetryObjects();
bufferArray = objects.map(addData);
lengthArray = objects.map(function (obj) {
return lengths[obj.getId()];
});
updateDomainExtrema(objects);
padRange();
}
function prepare(telemetryObject) {
var id = telemetryObject.getId();
lengths[id] = 0;
buffers[id] = new Float32Array(INITIAL_SIZE);
lengthArray.push(lengths[id]);
bufferArray.push(buffers[id]);
}
subscription.getTelemetryObjects().forEach(prepare);
@ -123,7 +126,10 @@ define(
* @returns {number[]} the dimensions which bound this data set
*/
getDimensions: function () {
return [max[0] - min[0], max[1] - min[1]];
// Pad range if necessary
return (max[1] === min[1]) ?
[max[0] - min[0], 2.0 ] :
[max[0] - min[0], max[1] - min[1]];
},
/**
* Get the origin of this data set's boundary.
@ -133,7 +139,8 @@ define(
* @returns {number[]} the origin of this data set's boundary
*/
getOrigin: function () {
return min;
// Pad range if necessary
return (max[1] === min[1]) ? [ min[0], min[1] - 1.0 ] : min;
},
/**
* Get the domain offset; this offset will have been subtracted
@ -163,7 +170,10 @@ define(
* @returns {Float32Array[]} the buffers for these traces
*/
getBuffers: function () {
return buffers;
return bufferArray;
},
getLength: function (index) {
return lengthArray;
},
/**
* Update with latest data.