Changeset 39245 for trunk/Ohana/src/libdvo

Timestamp:

Dec 11, 2015, 9:12:28 AM (11 years ago)

Author:

eugene

Message:

add api for arbitrary 3D rotations

Location:

trunk/Ohana/src/libdvo

Files:

• include/libdvo_astro.h (modified) (1 diff)
• src/coord_systems.c (modified) (1 diff)

trunk/Ohana/src/libdvo/include/libdvo_astro.h

@@ -138 +138 @@
 } Image;
 
+CoordTransform *AllocTransform (double phi, double Xo, double xo);
 CoordTransform *InitTransform (CoordTransformSystem input, CoordTransformSystem output);
 int ApplyTransform (double *x, double *y, double X, double Y, CoordTransform *transform);

trunk/Ohana/src/libdvo/src/coord_systems.c

@@ -1 +1 @@
 # include "dvo.h"
     
+CoordTransform *AllocTransform (double phi, double Xo, double xo) {
+
+  CoordTransform *transform;
+  ALLOCATE (transform, CoordTransform, 1);
+  transform->isIdentity = FALSE;
+  
+  transform->phi = phi*RAD_DEG;
+  transform->Xo  = Xo*RAD_DEG;
+  transform->xo  = xo;
+
+  // pre-calculated constants:
+  transform->sin_phi_cos_Xo = sin(transform->phi)*cos(transform->Xo);
+  transform->sin_phi_sin_Xo = sin(transform->phi)*sin(transform->Xo);
+  transform->cos_phi        = cos(transform->phi);
+  
+  transform->cos_phi_cos_Xo = cos(transform->phi)*cos(transform->Xo);
+  transform->cos_phi_sin_Xo = cos(transform->phi)*sin(transform->Xo);
+  transform->sin_phi        = sin(transform->phi);
+  transform->cos_Xo         = cos(transform->Xo);
+  transform->sin_Xo         = sin(transform->Xo);
+
+  return transform;
+}
+
 CoordTransform *InitTransform (CoordTransformSystem input, CoordTransformSystem output) {