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Allow geometries to use a shared vertex array

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The ol.geom.SharedVertices structure represents a flattened array of vertex coordinates.  This is intended to support optimal WebGL rendering.
This commit is contained in:
Tim Schaub
2013-03-02 18:39:24 +01:00
parent bdfa2cc88c
commit b52d283641
23 changed files with 1086 additions and 217 deletions
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68
test/spec/ol/geom/point.test.js
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@@ -10,6 +10,16 @@ describe('ol.geom.Point', function() {
expect(point).toBeA(ol.geom.Geometry);
});
it('accepts shared vertices', function() {
var vertices = new ol.geom.SharedVertices();
var p1 = new ol.geom.Point([10, 20], vertices);
var p2 = new ol.geom.Point([30, 40], vertices);
var p3 = new ol.geom.Point([50, 60], vertices);
expect(p1.getCoordinates()).toEqual([10, 20]);
expect(p2.getCoordinates()).toEqual([30, 40]);
expect(p3.getCoordinates()).toEqual([50, 60]);
});
it('throws when given with insufficient dimensions', function() {
expect(function() {
var point = new ol.geom.Point([1]);
@@ -18,19 +28,6 @@ describe('ol.geom.Point', function() {
});
describe('#coordinates', function() {
it('is an array', function() {
var point = new ol.geom.Point([10, 20]);
expect(point.coordinates.length).toBe(2);
expect(point.coordinates[0]).toBe(10);
expect(point.coordinates[1]).toBe(20);
});
});
describe('#dimension', function() {
it('can be 2', function() {
@@ -58,7 +55,52 @@ describe('ol.geom.Point', function() {
});
describe('#getCoordinates()', function() {
it('returns an array', function() {
var point = new ol.geom.Point([10, 20]);
expect(point.getCoordinates()).toEqual([10, 20]);
});
});
describe('#getSharedId()', function() {
it('returns identifiers', function() {
var vertices = new ol.geom.SharedVertices();
var p1 = new ol.geom.Point([10, 20], vertices);
var p2 = new ol.geom.Point([30, 40], vertices);
var p3 = new ol.geom.Point([50, 60], vertices);
var id1 = p1.getSharedId();
var id2 = p2.getSharedId();
var id3 = p3.getSharedId();
expect(vertices.coordinates).toEqual(
[10, 20, 30, 40, 50, 60]);
expect(vertices.getStart(id1)).toBe(0);
expect(vertices.getCount(id1)).toBe(1);
expect(vertices.get(id1, 0, 0)).toBe(10);
expect(vertices.get(id1, 0, 1)).toBe(20);
expect(vertices.getStart(id2)).toBe(2);
expect(vertices.getCount(id2)).toBe(1);
expect(vertices.get(id2, 0, 0)).toBe(30);
expect(vertices.get(id2, 0, 1)).toBe(40);
expect(vertices.getStart(id3)).toBe(4);
expect(vertices.getCount(id3)).toBe(1);
expect(vertices.get(id3, 0, 0)).toBe(50);
expect(vertices.get(id3, 0, 1)).toBe(60);
});
});
});
goog.require('ol.geom.Geometry');
goog.require('ol.geom.Point');
goog.require('ol.geom.SharedVertices');