defineSuite([ 'Core/QuantizedMeshTerrainData', 'Core/BoundingSphere', 'Core/Cartesian3', 'Core/GeographicTilingScheme', 'Core/Math', 'Core/TerrainData', 'Core/TerrainMesh', 'ThirdParty/when' ], function( QuantizedMeshTerrainData, BoundingSphere, Cartesian3, GeographicTilingScheme, CesiumMath, TerrainData, TerrainMesh, when) { 'use strict'; it('conforms to TerrainData interface', function() { expect(QuantizedMeshTerrainData).toConformToInterface(TerrainData); }); describe('upsample', function() { function findVertexWithCoordinates(uBuffer, vBuffer, u, v) { u *= 32767; u |= 0; v *= 32767; v |= 0; for (var i = 0; i < uBuffer.length; ++i) { if (Math.abs(uBuffer[i] - u) <= 1 && Math.abs(vBuffer[i] - v) <= 1) { return i; } } return -1; } function hasTriangle(ib, i0, i1, i2) { for (var i = 0; i < ib.length; i += 3) { if (ib[i] === i0 && ib[i + 1] === i1 && ib[i + 2] === i2 || ib[i] === i1 && ib[i + 1] === i2 && ib[i + 2] === i0 || ib[i] === i2 && ib[i + 1] === i0 && ib[i + 2] === i1) { return true; } } return false; } function intercept(interceptCoordinate1, interceptCoordinate2, otherCoordinate1, otherCoordinate2) { return CesiumMath.lerp(otherCoordinate1, otherCoordinate2, (0.5 - interceptCoordinate1) / (interceptCoordinate2 - interceptCoordinate1)); } function horizontalIntercept(u1, v1, u2, v2) { return intercept(v1, v2, u1, u2); } function verticalIntercept(u1, v1, u2, v2) { return intercept(u1, u2, v1, v2); } it('works for all four children of a simple quad', function() { var data = new QuantizedMeshTerrainData({ minimumHeight : 0.0, maximumHeight : 4.0, quantizedVertices : new Uint16Array([ // order is sw nw se ne // u 0, 0, 32767, 32767, // v 0, 32767, 0, 32767, // heights 32767 / 4.0, 2.0 * 32767 / 4.0, 3.0 * 32767 / 4.0, 32767 ]), indices : new Uint16Array([ 0, 3, 1, 0, 2, 3 ]), boundingSphere : new BoundingSphere(), horizonOcclusionPoint : new Cartesian3(), westIndices : [], southIndices : [], eastIndices : [], northIndices : [], westSkirtHeight : 1.0, southSkirtHeight : 1.0, eastSkirtHeight : 1.0, northSkirtHeight : 1.0, childTileMask : 15 }); var tilingScheme = new GeographicTilingScheme(); return when(data.createMesh(tilingScheme, 0, 0, 0, 1)).then(function() { var swPromise = data.upsample(tilingScheme, 0, 0, 0, 0, 0, 1); var sePromise = data.upsample(tilingScheme, 0, 0, 0, 1, 0, 1); var nwPromise = data.upsample(tilingScheme, 0, 0, 0, 0, 1, 1); var nePromise = data.upsample(tilingScheme, 0, 0, 0, 1, 1, 1); return when.join(swPromise, sePromise, nwPromise, nePromise); }).then(function(upsampleResults) { expect(upsampleResults.length).toBe(4); for (var i = 0; i < upsampleResults.length; ++i) { var upsampled = upsampleResults[i]; expect(upsampled).toBeDefined(); var uBuffer = upsampled._uValues; var vBuffer = upsampled._vValues; var ib = upsampled._indices; expect(uBuffer.length).toBe(4); expect(vBuffer.length).toBe(4); expect(upsampled._heightValues.length).toBe(4); expect(ib.length).toBe(6); var sw = findVertexWithCoordinates(uBuffer, vBuffer, 0.0, 0.0); expect(sw).not.toBe(-1); var nw = findVertexWithCoordinates(uBuffer, vBuffer, 0.0, 1.0); expect(nw).not.toBe(-1); var se = findVertexWithCoordinates(uBuffer, vBuffer, 1.0, 0.0); expect(se).not.toBe(-1); var ne = findVertexWithCoordinates(uBuffer, vBuffer, 1.0, 1.0); expect(ne).not.toBe(-1); var nwToSe = hasTriangle(ib, sw, se, nw) && hasTriangle(ib, nw, se, ne); var swToNe = hasTriangle(ib, sw, ne, nw) && hasTriangle(ib, sw, se, ne); expect(nwToSe || swToNe).toBe(true); } }); }); it('oct-encoded normals works for all four children of a simple quad', function() { var data = new QuantizedMeshTerrainData({ minimumHeight : 0.0, maximumHeight : 4.0, quantizedVertices : new Uint16Array([ // order is sw nw se ne // u 0, 0, 32767, 32767, // v 0, 32767, 0, 32767, // heights 32767 / 4.0, 2.0 * 32767 / 4.0, 3.0 * 32767 / 4.0, 32767 ]), encodedNormals : new Uint8Array([ // fun property of oct-encoded normals: the octrahedron is projected onto a plane // and unfolded into a unit square. The 4 corners of this unit square are encoded values // of the same Cartesian normal, vec3(0.0, 0.0, 1.0). // Therefore, all 4 normals below are actually oct-encoded representations of vec3(0.0, 0.0, 1.0) 255, 0, // sw 255, 255, // nw 255, 0, // se 255, 255 // ne ]), indices : new Uint16Array([ 0, 3, 1, 0, 2, 3 ]), boundingSphere : new BoundingSphere(), horizonOcclusionPoint : new Cartesian3(), westIndices : [], southIndices : [], eastIndices : [], northIndices : [], westSkirtHeight : 1.0, southSkirtHeight : 1.0, eastSkirtHeight : 1.0, northSkirtHeight : 1.0, childTileMask : 15 }); var tilingScheme = new GeographicTilingScheme(); return when(data.createMesh(tilingScheme, 0, 0, 0, 1)).then(function() { var swPromise = data.upsample(tilingScheme, 0, 0, 0, 0, 0, 1); var sePromise = data.upsample(tilingScheme, 0, 0, 0, 1, 0, 1); var nwPromise = data.upsample(tilingScheme, 0, 0, 0, 0, 1, 1); var nePromise = data.upsample(tilingScheme, 0, 0, 0, 1, 1, 1); return when.join(swPromise, sePromise, nwPromise, nePromise); }).then(function(upsampleResults) { expect(upsampleResults.length).toBe(4); for (var i = 0; i < upsampleResults.length; ++i) { var upsampled = upsampleResults[i]; expect(upsampled).toBeDefined(); var encodedNormals = upsampled._encodedNormals; expect(encodedNormals.length).toBe(8); // All 4 normals should remain oct-encoded representations of vec3(0.0, 0.0, -1.0) for (var n = 0; n < encodedNormals.length; ++n) { expect(encodedNormals[i]).toBe(255); } } }); }); it('works for a quad with an extra vertex in the northwest child', function() { var data = new QuantizedMeshTerrainData({ minimumHeight : 0.0, maximumHeight : 6.0, quantizedVertices : new Uint16Array([ // order is sw, nw, se, ne, extra vertex in nw quadrant // u 0, 0, 32767, 32767, 0.125 * 32767, // v 0, 32767, 0, 32767, 0.75 * 32767, // heights 32767 / 6.0, 2.0 * 32767 / 6.0, 3.0 * 32767 / 6.0, 4.0 * 32767 / 6.0, 32767 ]), indices : new Uint16Array([ 0, 4, 1, 0, 2, 4, 1, 4, 3, 3, 4, 2 ]), boundingSphere : new BoundingSphere(), horizonOcclusionPoint : new Cartesian3(), westIndices : [], southIndices : [], eastIndices : [], northIndices : [], westSkirtHeight : 1.0, southSkirtHeight : 1.0, eastSkirtHeight : 1.0, northSkirtHeight : 1.0, childTileMask : 15 }); var tilingScheme = new GeographicTilingScheme(); return when(data.createMesh(tilingScheme, 0, 0, 0, 1)).then(function() { return data.upsample(tilingScheme, 0, 0, 0, 0, 0, 1); }).then(function(upsampled) { var uBuffer = upsampled._uValues; var vBuffer = upsampled._vValues; var ib = upsampled._indices; expect(uBuffer.length).toBe(9); expect(vBuffer.length).toBe(9); expect(upsampled._heightValues.length).toBe(9); expect(ib.length).toBe(8 * 3); var sw = findVertexWithCoordinates(uBuffer, vBuffer, 0.0, 0.0); expect(sw).not.toBe(-1); var nw = findVertexWithCoordinates(uBuffer, vBuffer, 0.0, 1.0); expect(nw).not.toBe(-1); var se = findVertexWithCoordinates(uBuffer, vBuffer, 1.0, 0.0); expect(se).not.toBe(-1); var ne = findVertexWithCoordinates(uBuffer, vBuffer, 1.0, 1.0); expect(ne).not.toBe(-1); var extra = findVertexWithCoordinates(uBuffer, vBuffer, 0.25, 0.5); expect(extra).not.toBe(-1); var v40 = findVertexWithCoordinates(uBuffer, vBuffer, horizontalIntercept(0.0, 0.0, 0.125, 0.75) * 2.0, 0.0); expect(v40).not.toBe(-1); var v42 = findVertexWithCoordinates(uBuffer, vBuffer, horizontalIntercept(0.5, verticalIntercept(1.0, 0.0, 0.125, 0.75), 0.125, 0.75) * 2.0, 0.0); expect(v42).not.toBe(-1); var v402 = findVertexWithCoordinates(uBuffer, vBuffer, horizontalIntercept(0.5, 0.0, 0.125, 0.75) * 2.0, 0.0); expect(v402).not.toBe(-1); var v43 = findVertexWithCoordinates(uBuffer, vBuffer, 1.0, verticalIntercept(1.0, 1.0, 0.125, 0.75) * 2.0 - 1.0); expect(v43).not.toBe(-1); expect(hasTriangle(ib, sw, extra, nw)).toBe(true); expect(hasTriangle(ib, sw, v40, extra)).toBe(true); expect(hasTriangle(ib, v40, v402, extra)).toBe(true); expect(hasTriangle(ib, v402, v42, extra)).toBe(true); expect(hasTriangle(ib, extra, v42, v43)).toBe(true); expect(hasTriangle(ib, v42, se, v43)).toBe(true); expect(hasTriangle(ib, nw, v43, ne)).toBe(true); expect(hasTriangle(ib, nw, extra, v43)).toBe(true); }); }); it('works for a quad with an extra vertex on the splitting plane', function() { var data = new QuantizedMeshTerrainData({ minimumHeight : 0.0, maximumHeight : 6.0, quantizedVertices : new Uint16Array([ // order is sw, nw, se, ne, extra vertex in nw quadrant // u 0, 0, 32767, 32767, 0.5 * 32767, // v 0, 32767, 0, 32767, 0.75 * 32767, // heights 32767 / 6.0, 2.0 * 32767 / 6.0, 3.0 * 32767 / 6.0, 4.0 * 32767 / 6.0, 32767 ]), indices : new Uint16Array([ 0, 4, 1, 1, 4, 3, 0, 2, 4, 3, 4, 2 ]), boundingSphere : new BoundingSphere(), horizonOcclusionPoint : new Cartesian3(), westIndices : [], southIndices : [], eastIndices : [], northIndices : [], westSkirtHeight : 1.0, southSkirtHeight : 1.0, eastSkirtHeight : 1.0, northSkirtHeight : 1.0, childTileMask : 15 }); var tilingScheme = new GeographicTilingScheme(); return when(data.createMesh(tilingScheme, 0, 0, 0, 1)).then(function() { var nwPromise = data.upsample(tilingScheme, 0, 0, 0, 0, 0, 1); var nePromise = data.upsample(tilingScheme, 0, 0, 0, 1, 0, 1); return when.join(nwPromise, nePromise); }).then(function(upsampleResults){ expect(upsampleResults.length).toBe(2); var uBuffer, vBuffer; for (var i = 0; i < upsampleResults.length; i++) { var upsampled = upsampleResults[i]; expect(upsampled).toBeDefined(); uBuffer = upsampled._uValues; vBuffer = upsampled._vValues; var ib = upsampled._indices; expect(uBuffer.length).toBe(6); expect(vBuffer.length).toBe(6); expect(upsampled._heightValues.length).toBe(6); expect(ib.length).toBe(4 * 3); var sw = findVertexWithCoordinates(uBuffer, vBuffer, 0.0, 0.0); expect(sw).not.toBe(-1); var nw = findVertexWithCoordinates(uBuffer, vBuffer, 0.0, 1.0); expect(nw).not.toBe(-1); var se = findVertexWithCoordinates(uBuffer, vBuffer, 1.0, 0.0); expect(se).not.toBe(-1); var ne = findVertexWithCoordinates(uBuffer, vBuffer, 1.0, 1.0); expect(ne).not.toBe(-1); } // northwest uBuffer = upsampleResults[0]._uValues; vBuffer = upsampleResults[0]._vValues; var extra = findVertexWithCoordinates(uBuffer, vBuffer, 1.0, 0.5); expect(extra).not.toBe(-1); var v40 = findVertexWithCoordinates(uBuffer, vBuffer, horizontalIntercept(0.0, 0.0, 0.5, 0.75) * 2.0, 0.0); expect(v40).not.toBe(-1); expect(upsampleResults[0]._westIndices.length).toBe(2); expect(upsampleResults[0]._eastIndices.length).toBe(3); expect(upsampleResults[0]._northIndices.length).toBe(2); expect(upsampleResults[0]._southIndices.length).toBe(3); // northeast uBuffer = upsampleResults[1]._uValues; vBuffer = upsampleResults[1]._vValues; extra = findVertexWithCoordinates(uBuffer, vBuffer, 0.0, 0.5); expect(extra).not.toBe(-1); var v42 = findVertexWithCoordinates(uBuffer, vBuffer, horizontalIntercept(1.0, 0.0, 0.5, 0.75) * 0.5, 0.0); expect(v42).not.toBe(-1); expect(upsampleResults[1]._westIndices.length).toBe(3); expect(upsampleResults[1]._eastIndices.length).toBe(2); expect(upsampleResults[1]._northIndices.length).toBe(2); expect(upsampleResults[1]._southIndices.length).toBe(3); }); }); }); describe('createMesh', function() { var data; var tilingScheme; beforeEach(function() { tilingScheme = new GeographicTilingScheme(); data = new QuantizedMeshTerrainData({ minimumHeight : 0.0, maximumHeight : 4.0, quantizedVertices : new Uint16Array([ // order is sw nw se ne // u 0, 0, 32767, 32767, // v 0, 32767, 0, 32767, // heights 32767 / 4.0, 2.0 * 32767 / 4.0, 3.0 * 32767 / 4.0, 32767 ]), indices : new Uint16Array([ 0, 3, 1, 0, 2, 3 ]), boundingSphere : new BoundingSphere(), horizonOcclusionPoint : new Cartesian3(), westIndices : [0, 1], southIndices : [0, 1], eastIndices : [2, 3], northIndices : [1, 3], westSkirtHeight : 1.0, southSkirtHeight : 1.0, eastSkirtHeight : 1.0, northSkirtHeight : 1.0, childTileMask : 15 }); }); it('requires tilingScheme', function() { expect(function() { data.createMesh(undefined, 0, 0, 0); }).toThrowDeveloperError(); }); it('requires x', function() { expect(function() { data.createMesh(tilingScheme, undefined, 0, 0); }).toThrowDeveloperError(); }); it('requires y', function() { expect(function() { data.createMesh(tilingScheme, 0, undefined, 0); }).toThrowDeveloperError(); }); it('requires level', function() { expect(function() { data.createMesh(tilingScheme, 0, 0, undefined); }).toThrowDeveloperError(); }); it('creates specified vertices plus skirt vertices', function() { return data.createMesh(tilingScheme, 0, 0, 0).then(function(mesh) { expect(mesh).toBeInstanceOf(TerrainMesh); expect(mesh.vertices.length).toBe(12 * mesh.encoding.getStride()); // 4 regular vertices, 8 skirt vertices. expect(mesh.indices.length).toBe(10 * 3); // 2 regular triangles, 8 skirt triangles. expect(mesh.minimumHeight).toBe(data._minimumHeight); expect(mesh.maximumHeight).toBe(data._maximumHeight); expect(mesh.boundingSphere3D).toEqual(data._boundingSphere); }); }); it('exaggerates mesh', function() { return data.createMesh(tilingScheme, 0, 0, 0, 2).then(function(mesh) { expect(mesh).toBeInstanceOf(TerrainMesh); expect(mesh.vertices.length).toBe(12 * mesh.encoding.getStride()); // 4 regular vertices, 8 skirt vertices. expect(mesh.indices.length).toBe(10 * 3); // 2 regular triangles, 8 skirt triangles. expect(mesh.minimumHeight).toBe(data._minimumHeight); expect(mesh.maximumHeight).toBeGreaterThan(data._maximumHeight); expect(mesh.boundingSphere3D.radius).toBeGreaterThan(data._boundingSphere.radius); }); }); it('requires 32bit indices for large meshes', function() { var tilingScheme = new GeographicTilingScheme(); var quantizedVertices = []; var i; for (i = 0; i < 65 * 1024; i++) { quantizedVertices.push(i % 32767); // u } for (i = 0; i < 65 * 1024; i++) { quantizedVertices.push(Math.floor(i / 32767)); // v } for (i = 0; i < 65 * 1024; i++) { quantizedVertices.push(0.0); // height } var data = new QuantizedMeshTerrainData({ minimumHeight : 0.0, maximumHeight : 4.0, quantizedVertices : new Uint16Array(quantizedVertices), indices : new Uint32Array([ 0, 3, 1, 0, 2, 3, 65000, 65002, 65003]), boundingSphere : new BoundingSphere(), horizonOcclusionPoint : new Cartesian3(), westIndices : [0, 1], southIndices : [0, 1], eastIndices : [2, 3], northIndices : [1, 3], westSkirtHeight : 1.0, southSkirtHeight : 1.0, eastSkirtHeight : 1.0, northSkirtHeight : 1.0, childTileMask : 15 }); return data.createMesh(tilingScheme, 0, 0, 0).then(function(mesh) { expect(mesh).toBeInstanceOf(TerrainMesh); expect(mesh.indices.BYTES_PER_ELEMENT).toBe(4); }); }); }); describe('interpolateHeight', function() { var tilingScheme; var rectangle; beforeEach(function() { tilingScheme = new GeographicTilingScheme(); rectangle = tilingScheme.tileXYToRectangle(7, 6, 5); }); it('clamps coordinates if given a position outside the mesh', function() { var mesh = new QuantizedMeshTerrainData({ minimumHeight : 0.0, maximumHeight : 4.0, quantizedVertices : new Uint16Array([ // order is sw nw se ne // u 0, 0, 32767, 32767, // v 0, 32767, 0, 32767, // heights 32767 / 4.0, 2.0 * 32767 / 4.0, 3.0 * 32767 / 4.0, 32767 ]), indices : new Uint16Array([ 0, 3, 1, 0, 2, 3 ]), boundingSphere : new BoundingSphere(), horizonOcclusionPoint : new Cartesian3(), westIndices : [0, 1], southIndices : [0, 1], eastIndices : [2, 3], northIndices : [1, 3], westSkirtHeight : 1.0, southSkirtHeight : 1.0, eastSkirtHeight : 1.0, northSkirtHeight : 1.0, childTileMask : 15 }); expect(mesh.interpolateHeight(rectangle, 0.0, 0.0)).toBe(mesh.interpolateHeight(rectangle, rectangle.east, rectangle.south)); }); it('returns a height interpolated from the correct triangle', function() { // zero height along line between southwest and northeast corners. // Negative height in the northwest corner, positive height in the southeast. var mesh = new QuantizedMeshTerrainData({ minimumHeight : -16384, maximumHeight : 16383, quantizedVertices : new Uint16Array([ // order is sw nw se ne // u 0, 0, 32767, 32767, // v 0, 32767, 0, 32767, // heights 16384, 0, 32767, 16384 ]), indices : new Uint16Array([ 0, 3, 1, 0, 2, 3 ]), boundingSphere : new BoundingSphere(), horizonOcclusionPoint : new Cartesian3(), westIndices : [0, 1], southIndices : [0, 1], eastIndices : [2, 3], northIndices : [1, 3], westSkirtHeight : 1.0, southSkirtHeight : 1.0, eastSkirtHeight : 1.0, northSkirtHeight : 1.0, childTileMask : 15 }); // position in the northwest quadrant of the tile. var longitude = rectangle.west + (rectangle.east - rectangle.west) * 0.25; var latitude = rectangle.south + (rectangle.north - rectangle.south) * 0.75; var result = mesh.interpolateHeight(rectangle, longitude, latitude); expect(result).toBeLessThan(0.0); // position in the southeast quadrant of the tile. longitude = rectangle.west + (rectangle.east - rectangle.west) * 0.75; latitude = rectangle.south + (rectangle.north - rectangle.south) * 0.25; result = mesh.interpolateHeight(rectangle, longitude, latitude); expect(result).toBeGreaterThan(0.0); // position on the line between the southwest and northeast corners. longitude = rectangle.west + (rectangle.east - rectangle.west) * 0.5; latitude = rectangle.south + (rectangle.north - rectangle.south) * 0.5; result = mesh.interpolateHeight(rectangle, longitude, latitude); expect(result).toEqualEpsilon(0.0, 1e-10); }); }); describe('isChildAvailable', function() { var data; beforeEach(function() { data = new QuantizedMeshTerrainData({ minimumHeight : -16384, maximumHeight : 16383, quantizedVertices : new Uint16Array([ // order is sw nw se ne // u 0, 0, 32767, 32767, // v 0, 32767, 0, 32767, // heights 16384, 0, 32767, 16384 ]), indices : new Uint16Array([ 0, 3, 1, 0, 2, 3 ]), boundingSphere : new BoundingSphere(), horizonOcclusionPoint : new Cartesian3(), westIndices : [0, 1], southIndices : [0, 1], eastIndices : [2, 3], northIndices : [1, 3], westSkirtHeight : 1.0, southSkirtHeight : 1.0, eastSkirtHeight : 1.0, northSkirtHeight : 1.0, childTileMask : 15 }); }); it('requires thisX', function() { expect(function() { data.isChildAvailable(undefined, 0, 0, 0); }).toThrowDeveloperError(); }); it('requires thisY', function() { expect(function() { data.isChildAvailable(0, undefined, 0, 0); }).toThrowDeveloperError(); }); it('requires childX', function() { expect(function() { data.isChildAvailable(0, 0, undefined, 0); }).toThrowDeveloperError(); }); it('requires childY', function() { expect(function() { data.isChildAvailable(0, 0, 0, undefined); }).toThrowDeveloperError(); }); it('returns true for all children when child mask is not explicitly specified', function() { data = new QuantizedMeshTerrainData({ minimumHeight : -16384, maximumHeight : 16383, quantizedVertices : new Uint16Array([ // order is sw nw se ne // u 0, 0, 32767, 32767, // v 0, 32767, 0, 32767, // heights 16384, 0, 32767, 16384 ]), indices : new Uint16Array([ 0, 3, 1, 0, 2, 3 ]), boundingSphere : new BoundingSphere(), horizonOcclusionPoint : new Cartesian3(), westIndices : [0, 1], southIndices : [0, 1], eastIndices : [2, 3], northIndices : [1, 3], westSkirtHeight : 1.0, southSkirtHeight : 1.0, eastSkirtHeight : 1.0, northSkirtHeight : 1.0 }); expect(data.isChildAvailable(10, 20, 20, 40)).toBe(true); expect(data.isChildAvailable(10, 20, 21, 40)).toBe(true); expect(data.isChildAvailable(10, 20, 20, 41)).toBe(true); expect(data.isChildAvailable(10, 20, 21, 41)).toBe(true); }); it('works when only southwest child is available', function() { data = new QuantizedMeshTerrainData({ minimumHeight : -16384, maximumHeight : 16383, quantizedVertices : new Uint16Array([ // order is sw nw se ne // u 0, 0, 32767, 32767, // v 0, 32767, 0, 32767, // heights 16384, 0, 32767, 16384 ]), indices : new Uint16Array([ 0, 3, 1, 0, 2, 3 ]), boundingSphere : new BoundingSphere(), horizonOcclusionPoint : new Cartesian3(), westIndices : [0, 1], southIndices : [0, 1], eastIndices : [2, 3], northIndices : [1, 3], westSkirtHeight : 1.0, southSkirtHeight : 1.0, eastSkirtHeight : 1.0, northSkirtHeight : 1.0, childTileMask : 1 }); expect(data.isChildAvailable(10, 20, 20, 40)).toBe(false); expect(data.isChildAvailable(10, 20, 21, 40)).toBe(false); expect(data.isChildAvailable(10, 20, 20, 41)).toBe(true); expect(data.isChildAvailable(10, 20, 21, 41)).toBe(false); }); it('works when only southeast child is available', function() { data = new QuantizedMeshTerrainData({ minimumHeight : -16384, maximumHeight : 16383, quantizedVertices : new Uint16Array([ // order is sw nw se ne // u 0, 0, 32767, 32767, // v 0, 32767, 0, 32767, // heights 16384, 0, 32767, 16384 ]), indices : new Uint16Array([ 0, 3, 1, 0, 2, 3 ]), boundingSphere : new BoundingSphere(), horizonOcclusionPoint : new Cartesian3(), westIndices : [0, 1], southIndices : [0, 1], eastIndices : [2, 3], northIndices : [1, 3], westSkirtHeight : 1.0, southSkirtHeight : 1.0, eastSkirtHeight : 1.0, northSkirtHeight : 1.0, childTileMask : 2 }); expect(data.isChildAvailable(10, 20, 20, 40)).toBe(false); expect(data.isChildAvailable(10, 20, 21, 40)).toBe(false); expect(data.isChildAvailable(10, 20, 20, 41)).toBe(false); expect(data.isChildAvailable(10, 20, 21, 41)).toBe(true); }); it('works when only northwest child is available', function() { data = new QuantizedMeshTerrainData({ minimumHeight : -16384, maximumHeight : 16383, quantizedVertices : new Uint16Array([ // order is sw nw se ne // u 0, 0, 32767, 32767, // v 0, 32767, 0, 32767, // heights 16384, 0, 32767, 16384 ]), indices : new Uint16Array([ 0, 3, 1, 0, 2, 3 ]), boundingSphere : new BoundingSphere(), horizonOcclusionPoint : new Cartesian3(), westIndices : [0, 1], southIndices : [0, 1], eastIndices : [2, 3], northIndices : [1, 3], westSkirtHeight : 1.0, southSkirtHeight : 1.0, eastSkirtHeight : 1.0, northSkirtHeight : 1.0, childTileMask : 4 }); expect(data.isChildAvailable(10, 20, 20, 40)).toBe(true); expect(data.isChildAvailable(10, 20, 21, 40)).toBe(false); expect(data.isChildAvailable(10, 20, 20, 41)).toBe(false); expect(data.isChildAvailable(10, 20, 21, 41)).toBe(false); }); it('works when only northeast child is available', function() { data = new QuantizedMeshTerrainData({ minimumHeight : -16384, maximumHeight : 16383, quantizedVertices : new Uint16Array([ // order is sw nw se ne // u 0, 0, 32767, 32767, // v 0, 32767, 0, 32767, // heights 16384, 0, 32767, 16384 ]), indices : new Uint16Array([ 0, 3, 1, 0, 2, 3 ]), boundingSphere : new BoundingSphere(), horizonOcclusionPoint : new Cartesian3(), westIndices : [0, 1], southIndices : [0, 1], eastIndices : [2, 3], northIndices : [1, 3], westSkirtHeight : 1.0, southSkirtHeight : 1.0, eastSkirtHeight : 1.0, northSkirtHeight : 1.0, childTileMask : 8 }); expect(data.isChildAvailable(10, 20, 20, 40)).toBe(false); expect(data.isChildAvailable(10, 20, 21, 40)).toBe(true); expect(data.isChildAvailable(10, 20, 20, 41)).toBe(false); expect(data.isChildAvailable(10, 20, 21, 41)).toBe(false); }); }); });