/// <summary>
/// Checking the difference between the two shapes
/// </summary>
/// <param name="shp">
/// The first shape
/// </param>
/// <param name="shp2">
/// The second shape
/// </param>
/// <param name="theForm">
/// The form
/// </param>
/// <returns>
/// True when different
/// </returns>
internal static bool AreShapesDifferent(Shape shp, Shape shp2, ICallback theForm)
{
theForm.Progress(string.Empty, 100, "Checking the difference between the two shapes");
if (!shp.IsValid)
{
theForm.Error(string.Empty, "The first shape is invalid: " + shp.IsValidReason);
return(false);
}
if (!shp2.IsValid)
{
theForm.Error(string.Empty, "The second shape is invalid: " + shp2.IsValidReason);
return(false);
}
var wkt = shp.ExportToWKT();
var wkt2 = shp2.ExportToWKT();
if (wkt != wkt2)
{
theForm.Error(string.Empty, "Export to WKT for new shape is different from original one: \n" + wkt + "\n\n" + wkt2);
return(false);
}
if (shp.ShapeType != shp2.ShapeType)
{
var msg = string.Format(
"The first shape is a {0} and the second shape is a {1}",
shp.ShapeType,
shp2.ShapeType);
theForm.Error(string.Empty, msg);
return(false);
}
if (shp.numPoints != shp2.numPoints)
{
var msg = string.Format(
"The first shape has {0} points and the second shape has {1} points",
shp.numPoints,
shp2.NumParts);
theForm.Error(string.Empty, msg);
return(false);
}
if (shp.NumParts != shp2.NumParts)
{
var msg = string.Format(
"The first shape has {0} points and the second shape has {1} points",
shp.NumParts,
shp2.NumParts);
theForm.Error(string.Empty, msg);
return(false);
}
if (shp.ShapeType == ShpfileType.SHP_POLYGON || shp.ShapeType == ShpfileType.SHP_POLYGONM ||
shp.ShapeType == ShpfileType.SHP_POLYGONZ)
{
// Check area:
if (Math.Abs(shp.Area - shp2.Area) > 0.001)
{
var msg = string.Format(
"The first shape has an area of {0} and the second shape has an area of {1}",
shp.Area,
shp2.Area);
theForm.Error(string.Empty, msg);
return(false);
}
// Check perimeter:
if (Math.Abs(shp.Perimeter - shp2.Perimeter) > 0.001)
{
var msg =
string.Format(
"The first shape has a perimeter of {0} and the second shape has a perimeter of {1}",
shp.Perimeter,
shp2.Perimeter);
theForm.Error(string.Empty, msg);
return(false);
}
}
if (shp.ShapeType == ShpfileType.SHP_POLYLINE || shp.ShapeType == ShpfileType.SHP_POLYLINEM ||
shp.ShapeType == ShpfileType.SHP_POLYLINEZ)
{
// Check length:
if (Math.Abs(shp.Length - shp2.Length) > 0.001)
{
var msg =
string.Format(
"The first shape has a length of {0} and the second shape has a length of {1}",
shp.Length,
shp2.Length);
theForm.Error(string.Empty, msg);
return(false);
}
}
if (shp.SerializeToString() != shp2.SerializeToString())
{
theForm.Error(string.Empty, "The SerializeToString methods return different values:");
theForm.Error(string.Empty, shp.SerializeToString());
theForm.Error(string.Empty, shp2.SerializeToString());
return(false);
}
if (Math.Abs(shp.Extents.xMax - shp2.Extents.xMax) > 0.0001 || Math.Abs(shp.Extents.yMax - shp2.Extents.yMax) > 0.0001 ||
Math.Abs(shp.Extents.zMax - shp2.Extents.zMax) > 0.0001 || Math.Abs(shp.Extents.mMax - shp2.Extents.mMax) > 0.0001)
{
theForm.Error(string.Empty, "The max values of X, Y, Z or M return different values");
}
for (var i = 0; i < shp.numPoints; i++)
{
if (Math.Abs(shp.Point[i].M - shp2.Point[i].M) > 0.0001)
{
theForm.Error(string.Empty, "M values are different");
}
}
if (Math.Abs(shp.Extents.xMin - shp2.Extents.xMin) > 0.0001 || Math.Abs(shp.Extents.yMin - shp2.Extents.yMin) > 0.0001 ||
Math.Abs(shp.Extents.zMin - shp2.Extents.zMin) > 0.0001 || Math.Abs(shp.Extents.mMin - shp2.Extents.mMin) > 0.0001)
{
theForm.Error(string.Empty, "The min values of X, Y, Z or M return different values");
}
if (!shp.Equals(shp2))
{
theForm.Error(string.Empty, "Equals returns false");
return(false);
}
return(true);
}
