Index: branches/eam_branches/ipp-20130711/psModules/src/objects/pmModel_CentralPixel.c
===================================================================
--- branches/eam_branches/ipp-20130711/psModules/src/objects/pmModel_CentralPixel.c	(revision 35947)
+++ branches/eam_branches/ipp-20130711/psModules/src/objects/pmModel_CentralPixel.c	(revision 35948)
@@ -309,4 +309,84 @@
 }
 
+float pmModelCP_GetFlux_RotSqaure (pmModelCP *cp, float dx, float dy, float theta) {
+
+    // the cp data is defined for the central 3x3 pixels.  we allow dx,dy to have values of
+    // -1.0 <= dx,dy <= +1.0
+
+    // Xsub = (Xim * cos(theta) - Yim * sin(theta) + 1.5) * Nsub 
+    // Ysub = (Yim * cos(theta) + Xim * sin(theta) + 1.5) * Nsub 
+    
+    // integrate from (dx - 0.5 to dx + 0.5), (dy - 0.5 to dy + 0.5), 
+
+    // get the Xsub,Ysub values for the 4 corners, find the Xmin,Xmax, Ymin,Ymax in the
+    // subrastered image
+
+    float cs = cos(theta*PS_RAD_DEG);
+    float sn = sin(theta*PS_RAD_DEG);
+
+    float Nsub = 11.0;
+    int Xsub00 = ((dx - 0.5)*cs - (dy - 0.5)*sn + 1.5)*Nsub;
+    int Ysub00 = ((dx - 0.5)*sn + (dy - 0.5)*cs + 1.5)*Nsub;
+    int Xsub01 = ((dx - 0.5)*cs - (dy + 0.5)*sn + 1.5)*Nsub;
+    int Ysub01 = ((dx - 0.5)*sn + (dy + 0.5)*cs + 1.5)*Nsub;
+    int Xsub10 = ((dx + 0.5)*cs - (dy - 0.5)*sn + 1.5)*Nsub;
+    int Ysub10 = ((dx + 0.5)*sn + (dy - 0.5)*cs + 1.5)*Nsub;
+    int Xsub11 = ((dx + 0.5)*cs - (dy + 0.5)*sn + 1.5)*Nsub;
+    int Ysub11 = ((dx + 0.5)*sn + (dy + 0.5)*cs + 1.5)*Nsub;
+
+    /* generic rotated square:
+       
+     */
+
+    int Xmin, Xmax, Ymin, Ymax;
+
+    Xmin = PS_MIN(Xsub00,Xsub01);
+    Xmin = PS_MIN(Xsub10,Xmin);
+    Xmin = PS_MIN(Xsub11,Xmin);
+    Xmin = PS_MIN(Xmin, cp->flux->numCols - 1);
+    Xmin = PS_MAX(Xmin, 0);
+    Xmax = PS_MAX(Xsub00,Xsub01);
+    Xmax = PS_MAX(Xsub10,Xmax);
+    Xmax = PS_MAX(Xsub11,Xmax);
+    Xmax = PS_MIN(Xmax, cp->flux->numCols - 1);
+    Xmax = PS_MAX(Xmax, 0);
+    Ymin = PS_MIN(Ysub00,Ysub01);
+    Ymin = PS_MIN(Ysub10,Ymin);
+    Ymin = PS_MIN(Ysub11,Ymin);
+    Ymin = PS_MIN(Ymin, cp->flux->numRows - 1);
+    Ymin = PS_MAX(Ymin, 0);
+    Ymax = PS_MAX(Ysub00,Ysub01);
+    Ymax = PS_MAX(Ysub10,Ymax);
+    Ymax = PS_MAX(Ysub11,Ymax);
+    Ymax = PS_MIN(Ymax, cp->flux->numRows - 1);
+    Ymax = PS_MAX(Ymax, 0);
+
+    // integrate pixels from Xmin,Ymin to Xmax,Ymax, only include pixels contained in the
+    // target pixel
+
+    float flux = 0.0;
+    int   npix = 0;
+    for (int i = Xmin; i < Xmax; i++) {
+	float dX = i / Nsub - 1.5;
+	for (int j = Ymin; j < Ymax; j++) {
+	    float dY = j / Nsub - 1.5;
+
+	    float Xim =  dX*cs + dY*sn;
+	    if (Xim < (dx - 0.5)) continue;
+	    if (Xim > (dx + 0.5)) continue;
+
+	    float Yim = -dX*sn + dY*cs;
+	    if (Yim < (dy - 0.5)) continue;
+	    if (Yim > (dy + 0.5)) continue;
+
+	    flux += cp->flux->data.F32[j][i];
+	    npix ++;
+	}
+    }
+	   
+    float normFlux = flux / npix;
+    return normFlux;
+}
+
 float pmModelCP_GetFlux_Bresen (pmModelCP *cp, float dx, float dy, float theta) {