Cesium（Geometry）：各种GeometryInstance的添加方法

Cesium.Math.setRandomNumberSeed(1234);
var viewer = new Cesium.Viewer('cesiumContainer');
var scene = viewer.scene;
var primitives = scene.primitives;
var solidWhite = Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.WHITE);
// Combine instances for a rectangle, polygon, ellipse, and circle into a single primitive.
var rectangle = Cesium.Rectangle.fromDegrees(-92.0, 20.0, -86.0, 27.0);
var rectangleInstance = new Cesium.GeometryInstance({
	geometry: new Cesium.RectangleGeometry({
		rectangle: rectangle,
		vertexFormat: Cesium.EllipsoidSurfaceAppearance.VERTEX_FORMAT,
		stRotation: Cesium.Math.toRadians(45)
	})
});
var rectangleOutlineInstance = new Cesium.GeometryInstance({
	geometry: new Cesium.RectangleOutlineGeometry({
		rectangle: rectangle
	}),
	attributes: {
		color: solidWhite
	}
});
var positions = Cesium.Cartesian3.fromDegreesArray([-107.0, 27.0, -107.0, 22.0, -102.0, 23.0, -97.0, 21.0, -97.0, 25.0]);
var polygonInstance = new Cesium.GeometryInstance({
	geometry: Cesium.PolygonGeometry.fromPositions({
		positions: positions,
		vertexFormat: Cesium.EllipsoidSurfaceAppearance.VERTEX_FORMAT
	})
});
var polygonOutlineInstance = new Cesium.GeometryInstance({
	geometry: Cesium.PolygonOutlineGeometry.fromPositions({
		positions: positions
	}),
	attributes: {
		color: solidWhite
	}
});
var center = Cesium.Cartesian3.fromDegrees(-80.0, 25.0);
var semiMinorAxis = 300000.0;
var semiMajorAxis = 500000.0;
var rotation = Cesium.Math.toRadians(-40.0);
var ellipseInstance = new Cesium.GeometryInstance({
	geometry: new Cesium.EllipseGeometry({
		center: center,
		semiMinorAxis: semiMinorAxis,
		semiMajorAxis: semiMajorAxis,
		rotation: rotation,
		stRotation: Cesium.Math.toRadians(22),
		vertexFormat: Cesium.EllipsoidSurfaceAppearance.VERTEX_FORMAT
	})
});
var ellipseOutlineInstance = new Cesium.GeometryInstance({
	geometry: new Cesium.EllipseOutlineGeometry({
		center: center,
		semiMinorAxis: semiMinorAxis,
		semiMajorAxis: semiMajorAxis,
		rotation: rotation
	}),
	attributes: {
		color: solidWhite
	}
});
center = Cesium.Cartesian3.fromDegrees(-72.0, 25.0);
var radius = 250000.0;
var circleInstance = new Cesium.GeometryInstance({
	geometry: new Cesium.CircleGeometry({
		center: center,
		radius: radius,
		stRotation: Cesium.Math.toRadians(90),
		vertexFormat: Cesium.EllipsoidSurfaceAppearance.VERTEX_FORMAT
	})
});
var circleOutlineInstance = new Cesium.GeometryInstance({
	geometry: new Cesium.CircleOutlineGeometry({
		center: center,
		radius: radius
	}),
	attributes: {
		color: solidWhite
	}
});
primitives.add(new Cesium.Primitive({
	geometryInstances: [rectangleInstance, polygonInstance, ellipseInstance, circleInstance],
	appearance: new Cesium.EllipsoidSurfaceAppearance({
		material: Cesium.Material.fromType('Stripe')
	})
}));
primitives.add(new Cesium.Primitive({
	geometryInstances: [rectangleOutlineInstance, polygonOutlineInstance, ellipseOutlineInstance, circleOutlineInstance],
	appearance: new Cesium.PerInstanceColorAppearance({
		flat: true,
		translucent: false,
		renderState: {
			lineWidth: Math.min(4.0, scene.maximumAliasedLineWidth)
		}
	})
}));
// Create extruded rectangle
rectangle = Cesium.Rectangle.fromDegrees(-118.0, 38.0, -116.0, 40.0);
var extrudedHeight = 500000.0;
var extrudedRectangle = new Cesium.GeometryInstance({
	geometry: new Cesium.RectangleGeometry({
		rectangle: rectangle,
		vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
		extrudedHeight: extrudedHeight
	}),
	attributes: {
		color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({
			alpha: 1.0
		}))
	}
});
var extrudedOutlineRectangle = new Cesium.GeometryInstance({
	geometry: new Cesium.RectangleOutlineGeometry({
		rectangle: rectangle,
		extrudedHeight: extrudedHeight
	}),
	attributes: {
		color: solidWhite
	}
});
// Create extruded ellipse
center = Cesium.Cartesian3.fromDegrees(-117.0, 35.0);
semiMinorAxis = 100000.0;
semiMajorAxis = 200000.0;
rotation = Cesium.Math.toRadians(90);
var height = 100000.0;
extrudedHeight = 200000.0;
var extrudedEllipse = new Cesium.GeometryInstance({
	geometry: new Cesium.EllipseGeometry({
		center: center,
		semiMinorAxis: semiMinorAxis,
		semiMajorAxis: semiMajorAxis,
		vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
		height: height,
		rotation: rotation,
		extrudedHeight: extrudedHeight
	}),
	attributes: {
		color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({
			alpha: 1.0
		}))
	}
});
var extrudedOutlineEllipse = new Cesium.GeometryInstance({
	geometry: new Cesium.EllipseOutlineGeometry({
		center: center,
		semiMinorAxis: semiMinorAxis,
		semiMajorAxis: semiMajorAxis,
		height: height,
		rotation: rotation,
		extrudedHeight: extrudedHeight
	}),
	attributes: {
		color: solidWhite
	}
});
// Create extruded polygon
var polygonHierarchy = {
	positions: Cesium.Cartesian3.fromDegreesArray([-118.0, 30.0, -115.0, 30.0, -117.1, 31.1, -118.0, 33.0])
};
height = 300000.0;
extrudedHeight = 700000.0;
var extrudedPolygon = new Cesium.GeometryInstance({
	geometry: new Cesium.PolygonGeometry({
		polygonHierarchy: polygonHierarchy,
		vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
		extrudedHeight: extrudedHeight,
		height: height
	}),
	attributes: {
		color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({
			alpha: 1.0
		}))
	}
});
var extrudedOutlinePolygon = new Cesium.GeometryInstance({
	geometry: new Cesium.PolygonOutlineGeometry({
		polygonHierarchy: polygonHierarchy,
		extrudedHeight: extrudedHeight,
		height: height
	}),
	attributes: {
		color: solidWhite
	}
});
// cylinder
var length = 200000.0;
var topRadius = 150000.0;
var bottomRadius = 150000.0;
var modelMatrix = Cesium.Matrix4.multiplyByTranslation(Cesium.Transforms.eastNorthUpToFixedFrame(
		Cesium.Cartesian3.fromDegrees(-70.0, 45.0)),
	new Cesium.Cartesian3(0.0, 0.0, 100000.0), new Cesium.Matrix4());
var cylinderInstance = new Cesium.GeometryInstance({
	geometry: new Cesium.CylinderGeometry({
		length: length,
		topRadius: topRadius,
		bottomRadius: bottomRadius,
		vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT
	}),
	modelMatrix: modelMatrix,
	attributes: {
		color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({
			alpha: 1.0
		}))
	}
});
var cylinderOutlineInstance = new Cesium.GeometryInstance({
	geometry: new Cesium.CylinderOutlineGeometry({
		length: length,
		topRadius: topRadius,
		bottomRadius: bottomRadius
	}),
	modelMatrix: modelMatrix,
	attributes: {
		color: solidWhite
	}
});
primitives.add(new Cesium.Primitive({
	geometryInstances: [extrudedPolygon, extrudedRectangle, extrudedEllipse, cylinderInstance],
	appearance: new Cesium.PerInstanceColorAppearance({
		translucent: false,
		closed: true
	})
}));
primitives.add(new Cesium.Primitive({
	geometryInstances: [extrudedOutlineRectangle, extrudedOutlineEllipse, extrudedOutlinePolygon, cylinderOutlineInstance],
	appearance: new Cesium.PerInstanceColorAppearance({
		flat: true,
		translucent: false,
		renderState: {
			lineWidth: Math.min(4.0, scene.maximumAliasedLineWidth)
		}
	})
}));
// Create box and ellipsoid boxes, and use the instance's
// modelMatrix to scale and position them.
var dimensions = new Cesium.Cartesian3(1.0, 1.0, 1.0);
var boxGeometry = Cesium.BoxGeometry.fromDimensions({
	vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
	dimensions: dimensions
});
var boxOutlineGeometry = Cesium.BoxOutlineGeometry.fromDimensions({
	dimensions: dimensions
});
var radii = new Cesium.Cartesian3(0.5, 0.5, 1.0);
var ellipsoidGeometry = new Cesium.EllipsoidGeometry({
	vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
	radii: radii
});
var ellipsoidOutlineGeometry = new Cesium.EllipsoidOutlineGeometry({
	radii: radii,
	stackPartitions: 6,
	slicePartitions: 5
});
radius = 0.75;
var sphereGeometry = new Cesium.SphereGeometry({
	vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
	radius: radius
});
var sphereOutlineGeometry = new Cesium.SphereOutlineGeometry({
	radius: radius,
	stackPartitions: 6,
	slicePartitions: 5
});
var instances = [];
var outlineInstances = [];
var i;
var boxModelMatrix, ellipsoidModelMatrix, sphereModelMatrix;
for (i = 0; i < 5; ++i) {
	height = 100000.0 + (200000.0 * i);
	boxModelMatrix = Cesium.Matrix4.multiplyByUniformScale(Cesium.Matrix4.multiplyByTranslation(Cesium.Transforms.eastNorthUpToFixedFrame(
		Cesium.Cartesian3.fromDegrees(-106.0, 45.0)), new Cesium.Cartesian3(0.0, 0.0, height), new Cesium.Matrix4()), 90000.0, new Cesium.Matrix4());
	ellipsoidModelMatrix = Cesium.Matrix4.multiplyByUniformScale(Cesium.Matrix4.multiplyByTranslation(Cesium.Transforms.eastNorthUpToFixedFrame(
		Cesium.Cartesian3.fromDegrees(-102.0, 45.0)), new Cesium.Cartesian3(0.0, 0.0, height), new Cesium.Matrix4()), 90000.0, new Cesium.Matrix4());
	sphereModelMatrix = Cesium.Matrix4.multiplyByUniformScale(Cesium.Matrix4.multiplyByTranslation(Cesium.Transforms.eastNorthUpToFixedFrame(
		Cesium.Cartesian3.fromDegrees(-98.0, 45.0)), new Cesium.Cartesian3(0.0, 0.0, height), new Cesium.Matrix4()), 90000.0, new Cesium.Matrix4());
	instances.push(new Cesium.GeometryInstance({
		geometry: boxGeometry,
		modelMatrix: boxModelMatrix,
		attributes: {
			color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({
				alpha: 1.0
			}))
		}
	}));
	outlineInstances.push(new Cesium.GeometryInstance({
		geometry: boxOutlineGeometry,
		modelMatrix: boxModelMatrix,
		attributes: {
			color: solidWhite
		}
	}));
	instances.push(new Cesium.GeometryInstance({
		geometry: ellipsoidGeometry,
		modelMatrix: ellipsoidModelMatrix,
		attributes: {
			color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({
				alpha: 1.0
			}))
		}
	}));
	outlineInstances.push(new Cesium.GeometryInstance({
		geometry: ellipsoidOutlineGeometry,
		modelMatrix: ellipsoidModelMatrix,
		attributes: {
			color: solidWhite
		}
	}));
	instances.push(new Cesium.GeometryInstance({
		geometry: sphereGeometry,
		modelMatrix: sphereModelMatrix,
		attributes: {
			color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({
				alpha: 1.0
			}))
		}
	}));
	outlineInstances.push(new Cesium.GeometryInstance({
		geometry: sphereOutlineGeometry,
		modelMatrix: sphereModelMatrix,
		attributes: {
			color: solidWhite
		}
	}));
}
primitives.add(new Cesium.Primitive({
	geometryInstances: instances,
	appearance: new Cesium.PerInstanceColorAppearance({
		translucent: false,
		closed: true
	})
}));
primitives.add(new Cesium.Primitive({
	geometryInstances: outlineInstances,
	appearance: new Cesium.PerInstanceColorAppearance({
		flat: true,
		translucent: false,
		renderState: {
			lineWidth: Math.min(4.0, scene.maximumAliasedLineWidth)
		}
	})
}));
// Create a single wall
positions = Cesium.Cartesian3.fromDegreesArray([-95.0, 50.0, -85.0, 50.0, -75.0, 50.0]);
var maximumHeights = [500000, 1000000, 500000];
var minimumHeights = [0, 500000, 0];
var wallInstance = new Cesium.GeometryInstance({
	geometry: new Cesium.WallGeometry({
		positions: positions,
		maximumHeights: maximumHeights,
		minimumHeights: minimumHeights,
		vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT
	}),
	attributes: {
		color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({
			alpha: 0.7
		}))
	}
});
var wallOutlineInstance = new Cesium.GeometryInstance({
	geometry: new Cesium.WallOutlineGeometry({
		positions: positions,
		maximumHeights: maximumHeights,
		minimumHeights: minimumHeights
	}),
	attributes: {
		color: new Cesium.ColorGeometryInstanceAttribute(0.7, 0.7, 0.7, 1.0)
	}
});
primitives.add(new Cesium.Primitive({
	geometryInstances: wallInstance,
	appearance: new Cesium.PerInstanceColorAppearance()
}));
primitives.add(new Cesium.Primitive({
	geometryInstances: wallOutlineInstance,
	appearance: new Cesium.PerInstanceColorAppearance({
		flat: true,
		translucent: false,
		renderState: {
			lineWidth: Math.min(4.0, scene.maximumAliasedLineWidth)
		}
	})
}));
rectangle = Cesium.Rectangle.fromDegrees(-92.0, 30.0, -85.0, 40.0);
rectangleInstance = new Cesium.GeometryInstance({
	geometry: new Cesium.RectangleGeometry({
		rectangle: rectangle,
		vertexFormat: Cesium.EllipsoidSurfaceAppearance.VERTEX_FORMAT
	})
});
polygonHierarchy = {
	positions: Cesium.Cartesian3.fromDegreesArray([-109.0, 30.0, -95.0, 30.0, -95.0, 40.0, -109.0, 40.0]),
	holes: [{
		positions: Cesium.Cartesian3.fromDegreesArray([-107.0, 31.0, -107.0, 39.0, -97.0, 39.0, -97.0, 31.0]),
		holes: [{
			positions: Cesium.Cartesian3.fromDegreesArray([-105.0, 33.0, -99.0, 33.0, -99.0, 37.0, -105.0, 37.0]),
			holes: [{
				positions: Cesium.Cartesian3.fromDegreesArray([-103.0, 34.0, -101.0, 34.0, -101.0, 36.0, -103.0, 36.0])
			}]
		}]
	}]
};
polygonInstance = new Cesium.GeometryInstance({
	geometry: new Cesium.PolygonGeometry({
		polygonHierarchy: polygonHierarchy,
		vertexFormat: Cesium.EllipsoidSurfaceAppearance.VERTEX_FORMAT
	})
});
center = Cesium.Cartesian3.fromDegrees(-80.0, 35.0);
semiMinorAxis = 200000.0;
semiMajorAxis = 500000.0;
rotation = Cesium.Math.toRadians(30.0);
ellipseInstance = new Cesium.GeometryInstance({
	geometry: new Cesium.EllipseGeometry({
		center: center,
		semiMinorAxis: semiMinorAxis,
		semiMajorAxis: semiMajorAxis,
		rotation: rotation,
		vertexFormat: Cesium.EllipsoidSurfaceAppearance.VERTEX_FORMAT
	})
});
center = Cesium.Cartesian3.fromDegrees(-72.0, 35.0);
radius = 200000.0;
circleInstance = new Cesium.GeometryInstance({
	geometry: new Cesium.CircleGeometry({
		center: center,
		radius: radius,
		vertexFormat: Cesium.EllipsoidSurfaceAppearance.VERTEX_FORMAT
	})
});
primitives.add(new Cesium.Primitive({
	geometryInstances: [rectangleInstance, polygonInstance, ellipseInstance, circleInstance],
	appearance: new Cesium.EllipsoidSurfaceAppearance({
		material: Cesium.Material.fromType('Stripe')
	})
}));
// Create extruded rectangle
rectangle = Cesium.Rectangle.fromDegrees(-110.0, 38.0, -107.0, 40.0);
height = 700000.0;
extrudedHeight = 1000000.0;
rotation = Cesium.Math.toRadians(45.0);
extrudedRectangle = new Cesium.GeometryInstance({
	geometry: new Cesium.RectangleGeometry({
		rectangle: rectangle,
		vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
		height: height,
		rotation: rotation,
		extrudedHeight: extrudedHeight
	}),
	attributes: {
		color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({
			alpha: 1.0
		}))
	}
});
// Create extruded ellipse
center = Cesium.Cartesian3.fromDegrees(-110.0, 35.0);
semiMinorAxis = 100000.0;
semiMajorAxis = 200000.0;
rotation = Cesium.Math.toRadians(-40.0);
height = 300000.0;
extrudedHeight = 700000.0;
extrudedEllipse = new Cesium.GeometryInstance({
	geometry: new Cesium.EllipseGeometry({
		center: center,
		semiMinorAxis: semiMinorAxis,
		semiMajorAxis: semiMajorAxis,
		rotation: rotation,
		vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
		height: height,
		extrudedHeight: extrudedHeight
	}),
	attributes: {
		color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({
			alpha: 1.0
		}))
	}
});
// Create extruded polygon
polygonHierarchy = {
	positions: Cesium.Cartesian3.fromDegreesArray([-113.0, 30.0, -110.0, 30.0, -110.0, 33.0, -111.5, 31.0, -113.0, 33.0])
};
extrudedHeight = 300000.0;
extrudedPolygon = new Cesium.GeometryInstance({
	geometry: new Cesium.PolygonGeometry({
		polygonHierarchy: polygonHierarchy,
		vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
		extrudedHeight: extrudedHeight
	}),
	attributes: {
		color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({
			alpha: 1.0
		}))
	}
});
// cylinder
length = 400000.0;
topRadius = 0.0;
bottomRadius = 200000.0;
modelMatrix = Cesium.Matrix4.multiplyByTranslation(Cesium.Transforms.eastNorthUpToFixedFrame(
	Cesium.Cartesian3.fromDegrees(-70.0, 40.0)), new Cesium.Cartesian3(0.0, 0.0, 200000.0), new Cesium.Matrix4());
cylinderInstance = new Cesium.GeometryInstance({
	geometry: new Cesium.CylinderGeometry({
		length: length,
		topRadius: topRadius,
		bottomRadius: bottomRadius,
		vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT
	}),
	modelMatrix: modelMatrix,
	attributes: {
		color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({
			alpha: 1.0
		}))
	}
});
primitives.add(new Cesium.Primitive({
	geometryInstances: [extrudedPolygon, extrudedRectangle, extrudedEllipse, cylinderInstance],
	appearance: new Cesium.PerInstanceColorAppearance({
		translucent: false,
		closed: true
	})
}));
// Combine instances each with a unique color.
// We can combine heterogeneous geometries as we
// do here as long as vertex formats match.
instances = [];
center = Cesium.Cartesian3.fromDegrees(-65.0, 35.0);
radius = 200000.0;
rectangle = Cesium.Rectangle.fromDegrees(-67.0, 27.0, -63.0, 32.0);
for (i = 0; i < 5; ++i) {
	height = 200000.0 * i;
	instances.push(new Cesium.GeometryInstance({
		geometry: new Cesium.CircleGeometry({
			center: center,
			radius: radius,
			height: height,
			vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT
		}),
		attributes: {
			color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({
				alpha: 0.5
			}))
		}
	}));
	instances.push(new Cesium.GeometryInstance({
		geometry: new Cesium.RectangleGeometry({
			rectangle: rectangle,
			height: height,
			vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT
		}),
		attributes: {
			color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({
				alpha: 0.5
			}))
		}
	}));
}
primitives.add(new Cesium.Primitive({
	geometryInstances: instances,
	appearance: new Cesium.PerInstanceColorAppearance()
}));
// Create box and ellipsoid boxes, and use the instance's
// modelMatrix to scale and position them.
dimensions = new Cesium.Cartesian3(1.0, 1.0, 1.0);
boxGeometry = Cesium.BoxGeometry.fromDimensions({
	vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
	dimensions: dimensions
});
radii = new Cesium.Cartesian3(0.5, 0.5, 1.0);
ellipsoidGeometry = new Cesium.EllipsoidGeometry({
	vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
	radii: radii
});
radius = 0.75;
sphereGeometry = new Cesium.SphereGeometry({
	vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
	radius: radius
});
instances = [];
outlineInstances = [];
for (i = 0; i < 5; ++i) {
	height = 100000.0 + (200000.0 * i);
	boxModelMatrix = Cesium.Matrix4.multiplyByUniformScale(Cesium.Matrix4.multiplyByTranslation(Cesium.Transforms.eastNorthUpToFixedFrame(
		Cesium.Cartesian3.fromDegrees(-108.0, 45.0)), new Cesium.Cartesian3(0.0, 0.0, height), new Cesium.Matrix4()), 90000.0, new Cesium.Matrix4());
	ellipsoidModelMatrix = Cesium.Matrix4.multiplyByUniformScale(Cesium.Matrix4.multiplyByTranslation(Cesium.Transforms.eastNorthUpToFixedFrame(
		Cesium.Cartesian3.fromDegrees(-104.0, 45.0)), new Cesium.Cartesian3(0.0, 0.0, height), new Cesium.Matrix4()), 90000.0, new Cesium.Matrix4());
	sphereModelMatrix = Cesium.Matrix4.multiplyByUniformScale(Cesium.Matrix4.multiplyByTranslation(Cesium.Transforms.eastNorthUpToFixedFrame(
		Cesium.Cartesian3.fromDegrees(-100.0, 45.0)), new Cesium.Cartesian3(0.0, 0.0, height), new Cesium.Matrix4()), 90000.0, new Cesium.Matrix4());
	instances.push(new Cesium.GeometryInstance({
		geometry: boxGeometry,
		modelMatrix: boxModelMatrix,
		attributes: {
			color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({
				alpha: 0.5
			}))
		}
	}));
	instances.push(new Cesium.GeometryInstance({
		geometry: ellipsoidGeometry,
		modelMatrix: ellipsoidModelMatrix,
		attributes: {
			color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({
				alpha: 0.5
			}))
		}
	}));
	instances.push(new Cesium.GeometryInstance({
		geometry: sphereGeometry,
		modelMatrix: sphereModelMatrix,
		attributes: {
			color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({
				alpha: 0.5
			}))
		}
	}));
}
primitives.add(new Cesium.Primitive({
	geometryInstances: instances,
	appearance: new Cesium.PerInstanceColorAppearance({
		translucent: true,
		closed: true
	})
}));
positions = [];
var colors = [];
for (i = 0; i < 40; ++i) {
	positions.push(Cesium.Cartesian3.fromDegrees(-100.0 + i, 48.0));
	colors.push(Cesium.Color.fromRandom({
		alpha: 1.0
	}));
}
primitives.add(new Cesium.Primitive({
	geometryInstances: new Cesium.GeometryInstance({
		geometry: new Cesium.SimplePolylineGeometry({
			positions: positions,
			colors: colors
		})
	}),
	appearance: new Cesium.PerInstanceColorAppearance({
		flat: true,
		renderState: {
			// Override the appearance render state to change the
			// line width on system's that support it (Linx/Mac).
			lineWidth: Math.min(4.0, scene.maximumAliasedLineWidth)
		}
	})
}));
// create a polyline with a material
positions = [];
for (i = 0; i < 40; ++i) {
	positions.push(Cesium.Cartesian3.fromDegrees(-100.0 + i, 15.0));
}
primitives.add(new Cesium.Primitive({
	geometryInstances: new Cesium.GeometryInstance({
		geometry: new Cesium.PolylineGeometry({
			positions: positions,
			width: 10.0,
			vertexFormat: Cesium.PolylineMaterialAppearance.VERTEX_FORMAT
		})
	}),
	appearance: new Cesium.PolylineMaterialAppearance({
		material: Cesium.Material.fromType(Cesium.Material.PolylineGlowType)
	})
}));
// create a polyline with per segment colors
positions = [];
colors = [];
for (i = 0; i < 40; ++i) {
	positions.push(Cesium.Cartesian3.fromDegrees(-100.0 + i, 12.0));
	colors.push(Cesium.Color.fromRandom({
		alpha: 1.0
	}));
}
primitives.add(new Cesium.Primitive({
	geometryInstances: new Cesium.GeometryInstance({
		geometry: new Cesium.PolylineGeometry({
			positions: positions,
			width: 10.0,
			vertexFormat: Cesium.PolylineColorAppearance.VERTEX_FORMAT,
			colors: colors
		})
	}),
	appearance: new Cesium.PolylineColorAppearance()
}));
// create a polyline with per vertex colors
positions = [];
colors = [];
for (i = 0; i < 40; ++i) {
	positions.push(Cesium.Cartesian3.fromDegrees(-100.0 + i, 9.0));
	colors.push(Cesium.Color.fromRandom({
		alpha: 1.0
	}));
}
primitives.add(new Cesium.Primitive({
	geometryInstances: new Cesium.GeometryInstance({
		geometry: new Cesium.PolylineGeometry({
			positions: positions,
			width: 10.0,
			vertexFormat: Cesium.PolylineColorAppearance.VERTEX_FORMAT,
			colors: colors,
			colorsPerVertex: true
		})
	}),
	appearance: new Cesium.PolylineColorAppearance()
}));
// Create a single wall
positions = Cesium.Cartesian3.fromDegreesArrayHeights([-90.0, 43.0, 100000.0, -87.5, 45.0, 100000.0, -85.0, 43.0, 100000.0, -87.5, 41.0, 100000.0, -90.0, 43.0, 100000.0]);
wallInstance = new Cesium.GeometryInstance({
	geometry: new Cesium.WallGeometry({
		positions: positions
	})
});
primitives.add(new Cesium.Primitive({
	geometryInstances: wallInstance,
	appearance: new Cesium.MaterialAppearance({
		material: Cesium.Material.fromType('Checkerboard', {
			repeat: new Cesium.Cartesian2(20.0, 6.0)
		})
	})
}));
positions = Cesium.Cartesian3.fromDegreesArray([-120.0, 45.0, -125.0, 50.0, -125.0, 55.0]);
var width = 100000;
var corridor = new Cesium.GeometryInstance({
	geometry: new Cesium.CorridorGeometry({
		positions: positions,
		width: width,
		vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT
	}),
	attributes: {
		color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({
			alpha: 1.0
		}))
	}
});
var extrudedCorridor = new Cesium.GeometryInstance({
	geometry: new Cesium.CorridorGeometry({
		positions: positions,
		width: width,
		vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
		height: 300000,
		extrudedHeight: 400000
	}),
	attributes: {
		color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({
			alpha: 0.7
		}))
	}
});
var corridorOutline = new Cesium.GeometryInstance({
	geometry: new Cesium.CorridorOutlineGeometry({
		positions: positions,
		width: width,
		height: 700000
	}),
	attributes: {
		color: solidWhite
	}
});
var corridorFill = new Cesium.GeometryInstance({
	geometry: new Cesium.CorridorGeometry({
		positions: positions,
		width: width,
		vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
		height: 700000
	}),
	attributes: {
		color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({
			alpha: 0.7
		}))
	}
});
primitives.add(new Cesium.Primitive({
	geometryInstances: [corridor, extrudedCorridor, corridorFill],
	appearance: new Cesium.PerInstanceColorAppearance({
		translucent: true,
		closed: true
	})
}));
primitives.add(new Cesium.Primitive({
	geometryInstances: corridorOutline,
	appearance: new Cesium.PerInstanceColorAppearance({
		flat: true,
		translucent: false,
		renderState: {
			lineWidth: Math.min(4.0, scene.maximumAliasedLineWidth)
		}
	})
}));

function starPositions(arms, rOuter, rInner) {
	var angle = Math.PI / arms;
	var pos = [];
	for (var i = 0; i < 2 * arms; i++) {
		var r = (i % 2) === 0 ? rOuter : rInner;
		var p = new Cesium.Cartesian2(Math.cos(i * angle) * r, Math.sin(i * angle) * r);
		pos.push(p);
	}
	return pos;
}
positions = Cesium.Cartesian3.fromDegreesArrayHeights([-102.0, 15.0, 100000.0, -105.0, 20.0, 200000.0, -110.0, 20.0, 100000.0]);
var polylineVolumeFill = new Cesium.GeometryInstance({
	geometry: new Cesium.PolylineVolumeGeometry({
		polylinePositions: positions,
		vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
		shapePositions: starPositions(7, 30000.0, 20000.0)
	}),
	attributes: {
		color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({
			alpha: 1.0
		}))
	}
});
var polylineVolumeOutline = new Cesium.GeometryInstance({
	geometry: new Cesium.PolylineVolumeOutlineGeometry({
		polylinePositions: positions,
		shapePositions: starPositions(7, 30000.0, 20000.0)
	}),
	attributes: {
		color: solidWhite
	}
});
var polylineVolume = new Cesium.GeometryInstance({
	geometry: new Cesium.PolylineVolumeGeometry({
		polylinePositions: Cesium.Cartesian3.fromDegreesArray([-102.0, 15.0, -105.0, 20.0, -110.0, 20.0]),
		vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
		shapePositions: starPositions(7, 30000, 20000)
	}),
	attributes: {
		color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromRandom({
			alpha: 1.0
		}))
	}
});

function computeCircle(radius) {
	var positions = [];
	for (var i = 0; i < 360; i++) {
		var radians = Cesium.Math.toRadians(i);
		positions.push(new Cesium.Cartesian2(radius * Math.cos(radians), radius * Math.sin(radians)));
	}
	return positions;
}
var tubeGeometry = new Cesium.GeometryInstance({
	geometry: new Cesium.PolylineVolumeGeometry({
		polylinePositions: Cesium.Cartesian3.fromDegreesArray([-104.0, 13.0, -107.0, 18.0, -112.0, 18.0]),
		vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
		shapePositions: computeCircle(40000.0)
	}),
	attributes: {
		color: solidWhite
	}
});
primitives.add(new Cesium.Primitive({
	geometryInstances: [tubeGeometry, polylineVolume, polylineVolumeFill],
	appearance: new Cesium.PerInstanceColorAppearance({
		translucent: false,
		closed: true
	})
}));
primitives.add(new Cesium.Primitive({
	geometryInstances: polylineVolumeOutline,
	appearance: new Cesium.PerInstanceColorAppearance({
		flat: true,
		translucent: false,
		renderState: {
			lineWidth: 1.0
		}
	})
}));