Changes between Version 4 and Version 5 of FDORfc64

Timestamp:

Sep 24, 2012, 10:26:12 AM (12 years ago)

Author:

danstoica

Comment:

--

FDORfc64

@@ -9 +9 @@
 ||RFC Template Version||(1.0)|| 
 ||Submission Date|| September 25, 2012 ||
-||Last Modified|| Dan Stoica June 13, 2012 ||
+||Last Modified|| Dan Stoica September 25, 2012 ||
 ||Author||Dan Stoica||
 ||RFC Status||Not ready for review|| 
@@ -23 +23 @@
 == Overview ==
 
-This RFC is for enhance secondary filter performance in FDO Spatial project. It leverages the in-memory Spatial Index implemented by FDO RFC 63.
+This RFC is for enhancing the secondary filter performance in the FDO Spatial project. It leverages the in-memory Spatial Index implemented by FDO RFC 63.
 
 == Motivation ==
@@ -40 +40 @@
 The solution is to create a Spatial Index for the filter polygon where each segment of the polygon has an entry. This way all the steps 1-3 will benefit by limiting the segments to check to those in the area of interest. For example, the point-in-polygon test will run a spatial query using the X-ray bounding box as search area. Therefore, instead of traversing all the segments, only a few will be processed for X-ray intersections.
 
-The proposal is to add a new FdoSpatialUtility::Evaluate() method which takes a Spatial Index parameter. The reason the spatial index is owned by the caller is for performance reasons: the same geometry filter is used multiple times for each candidate geometry, and creating the spatial index each time is not optimal.
+The proposal is to add a new public FdoSpatialUtility::Evaluate() method which takes a Spatial Index parameter. The reason the spatial index is owned by the caller is for performance reasons: the same geometry filter is used multiple times for each candidate geometry, and creating the spatial index each time is not optimal.
 
 
@@ -68 +68 @@
     /// \return
     /// Returns the evaluation of spatial operation.
+
     FDO_SPATIAL_API static bool Evaluate(FdoIGeometry* g1, FdoSpatialOperations op, FdoIGeometry* g2, FdoSpatialIndex* si2, double toleranceXY); 
 
@@ -104 +105 @@
        }
 
-       // Assume the spatial operation is FdoSpatialOperations_Intersects
+       // Assume the spatial operation is FdoSpatialOperations_Intersects.
        // For every candidate geometry evaluate against the filter geometry...
 
@@ -111 +112 @@
        bool eval = FdoSpatialUtility::Evaluate(geomLeft, FdoSpatialOperations_Intersects, geomRight, si, 0.001);
 
-       // Do something with the result
+       // Do something with the result and continue with a the next candidate...
 
 == Managed FDO API ==