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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 | |||