PointCloudInstance.GetPoints Method

Extracts a collection of points based on a filter.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.4.0.0 (26.4.0.0)

Syntax

C#

public PointCollection GetPoints(
	PointCloudFilter filter,
	double averageDistance,
	int numPoints
)

Parameters

filter PointCloudFilter: The filter to control which points are extracted. The filter should be passed in the coordinates of the Revit model.
averageDistance Double: Desired average distance between "adjacent" cloud points (Revit units of length). The smaller the averageDistance the larger number of points will be returned up to the numPoints limit. Specifying this parameter makes actual number of points returned for a given filter independent of the density of coverage produced by the scanner.
numPoints Int32: The maximum number of points requested.

Return Value

PointCollection
A collection object containing points that pass the filter, but no more than the maximum number requested.

Exceptions

Exception	Condition
ArgumentException	The number of points read must range from 1 to 1000000.
ArgumentNullException	A non-optional argument was null
ArgumentOutOfRangeException	The given value for averageDistance must be no more than 30000 feet in absolute value.

Remarks

If there are more points in the cloud passing the filter than the number requested in this function, the results may not be consistent if the same call is made again.

Example

C#

private void GetPointCloudDataByIteration(PointCloudInstance pcInstance, PointCloudFilter pointCloudFilter)
{
    // read points by iteration
    double averageDistance = 0.001;
    int numberOfPoints= 10000;
    // Get points. Number of points is determined by the needs of the client. 
    PointCollection points = pcInstance.GetPoints(pointCloudFilter, averageDistance, numberOfPoints);
    foreach (CloudPoint point in points)
    {
        // Process each point 
        System.Drawing.Color color = System.Drawing.ColorTranslator.FromWin32(point.Color);
        String pointDescription = String.Format("({0}, {1}, {2}, {3}", point.X, point.Y, point.Z, color.ToString());
    }
}
// read points by pointer
public unsafe void GetPointCloudDataByPointer(PointCloudInstance pcInstance, PointCloudFilter pointCloudFilter)
{
    double averageDistance = 0.001;
    int numOfPoints = 10000;
    // Get points. Number of points is determined by the needs of the client.
    PointCollection points = pcInstance.GetPoints(pointCloudFilter, averageDistance, numOfPoints);
    CloudPoint* pointBuffer = (CloudPoint*)points.GetPointBufferPointer().ToPointer();
    int totalCount = points.Count;
    for (int numberOfPoints = 0; numberOfPoints < totalCount; numberOfPoints++)
    {
        CloudPoint point = *(pointBuffer + numberOfPoints);
        // Process each point 
        System.Drawing.Color color = System.Drawing.ColorTranslator.FromWin32(point.Color);
        String pointDescription = String.Format("({0}, {1}, {2}, {3}", point.X, point.Y, point.Z, color.ToString());
    }
}