Changeset 41832 for branches/eam_branches/ipp-dev-20210817/psModules/src/astrom/pmAstrometryUtils.c

Timestamp:

Oct 11, 2021, 11:35:13 AM (5 years ago)

Author:

eugene

Message:

explicitly use Ordinary polynomials for forward astrometry transformations (chip->fpa->tpa->sky)

File:

• branches/eam_branches/ipp-dev-20210817/psModules/src/astrom/pmAstrometryUtils.c (modified) (4 diffs)

branches/eam_branches/ipp-dev-20210817/psModules/src/astrom/pmAstrometryUtils.c

@@ -131 +131 @@
 
 // convert a transformation L(x,y) to L'(x-xo,y-yo)
+// is this used for an upward (e.g., chip->fpa) or a downward (fpa->chip) transform?
 psPlaneTransform *psPlaneTransformSetCenter (psPlaneTransform *output, psPlaneTransform *input, double Xo, double Yo)
 {
 
-    // validate fit order
+    // validate fit type:
+    // polynomial in input transforms must match type -- and for now be ORD
+    psAssert (input->x->type == PS_POLYNOMIAL_ORD, "fix for CHEB");
+    psAssert (input->y->type == PS_POLYNOMIAL_ORD, "fix for CHEB");
 
     if (output == NULL) {
-        output = psPlaneTransformAlloc(input->x->nX, input->x->nY);
+        output = psPlaneTransformAlloc(input->x->nX, input->x->nY, PS_POLYNOMIAL_ORD);
     }
 
@@ -180 +184 @@
 
 // rotate a transformation L(x,y) by theta
-psPlaneTransform *psPlaneTransformRotate (psPlaneTransform *output, psPlaneTransform *input, double theta)
+psPlaneTransform *psPlaneTransformRotate  (psPlaneTransform *output, psPlaneTransform *input, double theta)
 {
     /* given the polynomial transformations:
@@ -192 +196 @@
 
     if (output == NULL) {
-        output = psPlaneTransformAlloc(input->x->nX, input->x->nY);
+        // generate a new transform using the same order and type as the input
+        output = psPlaneTransformAlloc(input->x->nX, input->x->nY, input->x->type);
     }
 
@@ -227 +232 @@
 
     // all coeffs and masks initially set to 0
-    transform = psPlaneTransformAlloc (order, order);
+    transform = psPlaneTransformAlloc (order, order, PS_POLYNOMIAL_ORD);
 
     for (int i = 0; i <= order; i++) {