1 files changed, 98 insertions, 0 deletions
diff --git a/src/index.c b/src/index.c
new file mode 100644
index 00000000..c8d5dbe6
--- /dev/null
+++ b/src/index.c
@@ -0,0 +1,98 @@
+/*
+ * index.c
+ *
+ * Perform indexing (somehow)
+ *
+ * (c) 2006-2009 Thomas White <taw@physics.org>
+ *
+ * Part of CrystFEL - crystallography with a FEL
+ *
+ */
+
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <math.h>
+#include <string.h>
+#include <assert.h>
+
+#include "image.h"
+#include "utils.h"
+#include "peaks.h"
+#include "dirax.h"
+
+
+static int map_position(struct image *image, double x, double y,
+                        double *rx, double *ry, double *rz)
+{
+	/* "Input" space */
+	double d;
+
+	/* Angular description of reflection */
+	double theta, psi, k;
+
+	x -= image->x_centre;
+	y -= image->y_centre;
+	k = 1.0 / image->lambda;
+
+	/* FIXME: Don't process lower CCD for now */
+	if ( y < 0 ) return 0;
+
+	if ( image->fmode == FORMULATION_CLEN ) {
+
+		/* Convert pixels to metres */
+		x /= image->resolution;
+		y /= image->resolution;	/* Convert pixels to metres */
+		d = sqrt((x*x) + (y*y));
+		theta = atan2(d, image->camera_len);
+
+	} else if (image->fmode == FORMULATION_PIXELSIZE ) {
+
+		/* Convert pixels to metres^-1 */
+		x *= image->pixel_size;
+		y *= image->pixel_size;	/* Convert pixels to metres^-1 */
+		d = sqrt((x*x) + (y*y));
+		theta = atan2(d, k);
+
+	} else {
+		ERROR("Unrecognised formulation mode in mapping_scale.\n");
+		return -1;
+	}
+
+	psi = atan2(y, x);
+
+	*rx = k*sin(theta)*cos(psi);
+	*ry = k*sin(theta)*sin(psi);
+	*rz = k - k*cos(theta);
+
+	return 0;
+}
+
+
+void index_pattern(struct image *image, int no_index, int dump_peaks,
+                   int use_dirax)
+{
+	int i;
+
+	/* Perform 'fine' peak search */
+	search_peaks(image, dump_peaks);
+
+	/* Map positions to 3D. FIXME: Handle lower detector */
+	for ( i=0; i<image_feature_count(image->features); i++ ) {
+
+		struct imagefeature *f;
+
+		f = image_get_feature(image->features, i);
+		map_position(image, f->x, f->y, &f->rx, &f->ry, &f->rz);
+
+	}
+
+	if ( use_dirax ) {
+		run_dirax(image, no_index);
+		return;
+	}
+}