Changes between Version 4 and Version 5 of rfc22_rpc

Timestamp:

Mar 30, 2008, 9:01:26 AM (16 years ago)

Author:

warmerdam

Comment:

added swig bindings for transformer api

rfc22_rpc

@@ -123 +123 @@
  * The raw access is by the established metadata api, so no changes are needed for this.
  * The Warp API is only bound at a high level, so there should be no changes in this regard.
+ * For testing purposes it is desirable to provide a binding around the GDAL transformer API.  The following planned binding is based loosely on OGRCoordinateTransformation API binding.  So far I have only found the TransformPoint( bDstToSrc, x, y, z ) entry point to be useful in Python and even that ends up returning a (bSuccess, (x, y, z)) result which is somewhat ackward.  Is there a better way of doing this?
+
+{{{
+/************************************************************************/
+/*                             Transformer                              */
+/************************************************************************/
+
+%rename (Transformer) GDALTransformerInfoShadow;
+class GDALTransformerInfoShadow {
+private:
+  GDALTransformerInfoShadow();
+public:
+%extend {
+
+  GDALTransformerInfoShadow( GDALDatasetShadow *src, GDALDatasetShadow *dst,
+                             char **options ) {
+    GDALTransformerInfoShadow *obj = (GDALTransformerInfoShadow*) 
+       GDALCreateGenImgProjTransformer2( (GDALDatasetH)src, (GDALDatasetH)dst, 
+                                         options );
+    return obj;
+  }
+
+  ~GDALTransformerInfoShadow() {
+    GDALDestroyTransformer( self );
+  }
+
+// Need to apply argin typemap second so the numinputs=1 version gets applied
+// instead of the numinputs=0 version from argout.
+%apply (double argout[ANY]) {(double inout[3])};
+%apply (double argin[ANY]) {(double inout[3])};
+  int TransformPoint( int bDstToSrc, double inout[3] ) {
+    int nRet, nSuccess = TRUE;
+
+    nRet = GDALUseTransformer( self, bDstToSrc, 
+                               1, &inout[0], &inout[1], &inout[2], 
+                               &nSuccess );
+
+    return nRet && nSuccess;
+  }
+%clear (double inout[3]);
+
+  int TransformPoint( double argout[3], int bDstToSrc, 
+                      double x, double y, double z = 0.0 ) {
+    int nRet, nSuccess = TRUE;
+    
+    argout[0] = x;
+    argout[1] = y;
+    argout[2] = z;
+    nRet = GDALUseTransformer( self, bDstToSrc, 
+                               1, &argout[0], &argout[1], &argout[2], 
+                               &nSuccess );
+
+    return nRet && nSuccess;
+  }
+  
+#ifdef SWIGCSHARP
+  %apply (double *inout) {(double*)};
+  %apply (double *inout) {(int*)};
+#endif
+  int TransformPoints( int bDstToSrc, 
+                       int nCount, double *x, double *y, double *z,
+                       int *panSuccess ) {
+    int nRet;
+
+    nRet = GDALUseTransformer( self, bDstToSrc, nCount, x, y, z, panSuccess );
+
+    return nRet;
+  }
+#ifdef SWIGCSHARP
+  %clear (double*);
+  %clear (int*);
+#endif
+
+} /*extend */
+};
+
+}}}
 
 == Implementation ==
@@ -128 +205 @@
 This work will be implemented by Frank Warmerdam with support from the Canadian Nuclear Safety Commission.
 
+== Testing ==
+
+ * A test script for the transformer API covering RPC, GCP_TPS, GCP_POLYNOMIAL, GEOLOC and GEOTRANSFORM methods will be implemented.
+ * A test script for reading and writing RPB, and GeoTIFF RPC tags will be written.