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| 1 | +// Creates a large number of entities on the cardinal planes of the octree (all | |
| 2 | +// objects will live in the root octree element). Measures how long it takes | |
| 3 | +// to update the properties of the first and last entity. The difference | |
| 4 | +// between the two measurements shows how the cost of lookup changes as a | |
| 5 | +// function of the number of entities. For best results run this in an | |
| 6 | +// otherwise empty domain. | |
| 7 | + | |
| 8 | +var firstId; | |
| 9 | +var lastId; | |
| 10 | +var NUM_ENTITIES_ON_SIDE = 25; | |
| 11 | + | |
| 12 | +// create the objects | |
| 13 | +createObjects = function () { | |
| 14 | + var STRIDE = 0.75; | |
| 15 | + var WIDTH = 0.5; | |
| 16 | + var DIMENSIONS = { x: WIDTH, y: WIDTH, z: WIDTH }; | |
| 17 | + var LIFETIME = 20; | |
| 18 | + | |
| 19 | + var properties = { | |
| 20 | + name: "", | |
| 21 | + type : "Box", | |
| 22 | + dimensions : DIMENSIONS, | |
| 23 | + position : { x: 0, y: 0, z: 0}, | |
| 24 | + lifetime : LIFETIME, | |
| 25 | + color : { red:255, green: 64, blue: 255 } | |
| 26 | + }; | |
| 27 | + | |
| 28 | + // xy | |
| 29 | + var planeName = "xy"; | |
| 30 | + for (var i = 0; i < NUM_ENTITIES_ON_SIDE; ++i) { | |
| 31 | + for (var j = 0; j < NUM_ENTITIES_ON_SIDE; ++j) { | |
| 32 | + properties.name = "Box-" + planeName + "-" + i + "." + j; | |
| 33 | + properties.position = { x: i * STRIDE, y: j * STRIDE, z: 0 }; | |
| 34 | + var red = i * 255 / NUM_ENTITIES_ON_SIDE; | |
| 35 | + var green = j * 255 / NUM_ENTITIES_ON_SIDE; | |
| 36 | + var blue = 0; | |
| 37 | + properties.color = { red: red, green: green, blue: blue }; | |
| 38 | + if (i == 0 && j == 0) { | |
| 39 | + firstId = Entities.addEntity(properties); | |
| 40 | + } else { | |
| 41 | + Entities.addEntity(properties); | |
| 42 | + } | |
| 43 | + } | |
| 44 | + } | |
| 45 | + | |
| 46 | + // yz | |
| 47 | + var planeName = "yz"; | |
| 48 | + for (var i = 0; i < NUM_ENTITIES_ON_SIDE; ++i) { | |
| 49 | + for (var j = 0; j < NUM_ENTITIES_ON_SIDE; ++j) { | |
| 50 | + properties.name = "Box-" + planeName + "-" + i + "." + j; | |
| 51 | + properties.position = { x: 0, y: i * STRIDE, z: j * STRIDE }; | |
| 52 | + var red = 0; | |
| 53 | + var green = i * 255 / NUM_ENTITIES_ON_SIDE; | |
| 54 | + var blue = j * 255 / NUM_ENTITIES_ON_SIDE; | |
| 55 | + properties.color = { red: red, green: green, blue: blue }; | |
| 56 | + Entities.addEntity(properties); | |
| 57 | + } | |
| 58 | + } | |
| 59 | + | |
| 60 | + // zx | |
| 61 | + var planeName = "zx"; | |
| 62 | + for (var i = 0; i < NUM_ENTITIES_ON_SIDE; ++i) { | |
| 63 | + for (var j = 0; j < NUM_ENTITIES_ON_SIDE; ++j) { | |
| 64 | + properties.name = "Box-" + planeName + "-" + i + "." + j; | |
| 65 | + properties.position = { x: j * STRIDE, y: 0, z: i * STRIDE }; | |
| 66 | + var red = j * 255 / NUM_ENTITIES_ON_SIDE; | |
| 67 | + var green = 0; | |
| 68 | + var blue = i * 255 / NUM_ENTITIES_ON_SIDE; | |
| 69 | + properties.color = { red: red, green: green, blue: blue }; | |
| 70 | + lastId = Entities.addEntity(properties); | |
| 71 | + } | |
| 72 | + } | |
| 73 | +}; | |
| 74 | + | |
| 75 | +createObjects(); | |
| 76 | + | |
| 77 | +// measure the time it takes to edit the first and last entities many times | |
| 78 | +// (requires a lookup by entityId each time) | |
| 79 | +changeProperties = function (id) { | |
| 80 | + var newProperties = { color : { red: 255, green: 255, blue: 255 } }; | |
| 81 | + Entities.editEntity(id, newProperties); | |
| 82 | +} | |
| 83 | + | |
| 84 | +// first | |
| 85 | +var NUM_CHANGES = 10000; | |
| 86 | +var firstStart = Date.now(); | |
| 87 | +for (var k = 0; k < NUM_CHANGES; ++k) { | |
| 88 | + changeProperties(firstId); | |
| 89 | +} | |
| 90 | +var firstEnd = Date.now(); | |
| 91 | +var firstDt = firstEnd - firstStart; | |
| 92 | + | |
| 93 | +// last | |
| 94 | +var lastStart = Date.now(); | |
| 95 | +for (var k = 0; k < NUM_CHANGES; ++k) { | |
| 96 | + changeProperties(lastId); | |
| 97 | +} | |
| 98 | +var lastEnd = Date.now(); | |
| 99 | +var lastDt = lastEnd - lastStart; | |
| 100 | + | |
| 101 | +// print the results | |
| 102 | +var numEntities = 3 * NUM_ENTITIES_ON_SIDE * NUM_ENTITIES_ON_SIDE; | |
| 103 | +print("numEntities = " + numEntities + " numEdits = " + NUM_CHANGES + " firstDt = " + firstDt + " lastDt = " + lastDt); | |
| 104 | + | |