110 lines
3.3 KiB
JavaScript
110 lines
3.3 KiB
JavaScript
|
/**
|
||
|
|
* Class that represents a generator that streams the frustum, and tries to preload recommendations that might be clicked
|
||
|
|
* @constructor
|
||
|
|
* @augments geo.ConfigGenerator
|
||
|
|
* @param streamer {geo.MeshStreamer} the parent mesh streamer
|
||
|
|
*/
|
||
|
|
geo.V_PP_Generator = function() {
|
||
|
|
|
||
|
|
geo.ConfigGenerator.apply(this, arguments);
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
geo.V_PP_Generator.prototype = Object.create(geo.ConfigGenerator);
|
||
|
|
geo.V_PP_Generator.prototype.constructor = geo.V_PP_Generator;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Generates a config that streams partly the frustum, and splits the rest of the chunk among the recommendations that are likely to be clicked
|
||
|
|
* @param cameraFrustum {Object} the frustum of the camera (with its position, target, and planes)
|
||
|
|
* @returns {Object[]} an array with one element corresponding the camera frustum, and other for eventual recommendations to preload
|
||
|
|
*/
|
||
|
|
geo.V_PP_Generator.prototype.generateMainConfig = function(cameraFrustum) {
|
||
|
|
|
||
|
|
var config;
|
||
|
|
|
||
|
|
if (this.streamer.beginning === true) {
|
||
|
|
|
||
|
|
console.log('Begining : full init');
|
||
|
|
config = [{recommendationId : 0, proportion:1, smart: true}];
|
||
|
|
|
||
|
|
} else {
|
||
|
|
|
||
|
|
// Case full prefetch
|
||
|
|
console.log("Allow some prefetching");
|
||
|
|
|
||
|
|
didPrefetch = true;
|
||
|
|
config = [{ frustum: cameraFrustum, proportion : this.streamer.frustumPercentage}];
|
||
|
|
|
||
|
|
if (this.streamer.predictionTable !== undefined) {
|
||
|
|
|
||
|
|
var sum = 0;
|
||
|
|
|
||
|
|
for (var i = 1; i <= this.streamer.mesh.recommendations.length; i++) {
|
||
|
|
|
||
|
|
sum += this.streamer.predictionTable[this.streamer.previousReco][i];
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
for (var i = 1; i <= this.streamer.mesh.recommendations.length; i++) {
|
||
|
|
|
||
|
|
if (this.streamer.predictionTable[this.streamer.previousReco][i] > 0) {
|
||
|
|
|
||
|
|
config.push({
|
||
|
|
|
||
|
|
proportion : this.streamer.predictionTable[this.streamer.previousReco][i] * this.streamer.prefetchPercentage / sum,
|
||
|
|
recommendationId : i,
|
||
|
|
smart: true
|
||
|
|
|
||
|
|
});
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
} else {
|
||
|
|
|
||
|
|
process.stderr.write('ERROR : PREDICTION TABLE IF UNDEFINED');
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
return config;
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Generates a config that depends on the previous configuration and that tries to fill the recommendations that were not already filled.
|
||
|
|
* @param previousConfig {Object} the previous configuration list (that was launched on <code>generateMainConfig</code>
|
||
|
|
* @param previousData {Object} the data that were given by the <code>nextElements</code> method on {@link geo.MeshStreamer}
|
||
|
|
* @param cameraFrustum {Object} the frustum of the camera, containing its position, target and planes
|
||
|
|
* @returns {Object[]} a configuration that tries to fill what was not filled before
|
||
|
|
*/
|
||
|
|
geo.V_PP_Generator.prototype.generateFillingConfig = function(previousConfig, previousData, cameraFrustum) {
|
||
|
|
|
||
|
|
var sum = 0;
|
||
|
|
var newConfig = [];
|
||
|
|
|
||
|
|
for (var i = 0; i < previousConfig.length; i++) {
|
||
|
|
|
||
|
|
// Check if previousConfig was full
|
||
|
|
if (previousResult.configSizes[i] >= this.streamer.chunk * previousConfig[i].proportion) {
|
||
|
|
|
||
|
|
newConfig.push(previousConfig[i]);
|
||
|
|
sum += previousConfig[i].proportion;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
// Normalize previousConfig probabilities
|
||
|
|
for (var i = 0; i < newConfig.length; i++) {
|
||
|
|
|
||
|
|
newConfig[i].proportion /= sum;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
return newConfig;
|
||
|
|
|
||
|
|
};
|