Fix bug in treatment of non-integer crpix (#221)

amaurea · web-flow · commit 5c5fa070ba53 · 2025-09-19T13:23:23.000-04:00
Fractional crpix were silently truncated to integer, causing incorrect results.
diff --git a/src/Projection.cxx b/src/Projection.cxx
@@ -900,7 +900,7 @@ class Pixelizor2_Flat<NonTiled, Interpol> {
         return -1;
     }
 
-    int crpix[2];
+    double crpix[2];
     double cdelt[2];
     int naxis[2];
     BufferWrapper<double> mapbuf;

Original file line number	Diff line number	Diff line change
`@@ -900,7 +900,7 @@ class Pixelizor2_Flat<NonTiled, Interpol> {`
`900`	`900`	`return -1;`
`901`	`901`	`}`
`902`	`902`
`903`		`- int crpix[2];`
	`903`	`+ double crpix[2];`
`904`	`904`	`double cdelt[2];`
`905`	`905`	`int naxis[2];`
`906`	`906`	`BufferWrapper<double> mapbuf;`