Changeset 8882 for trunk/psphot/src/models/pmModel_QGAUSS.c

Timestamp:

Sep 22, 2006, 2:29:31 AM (20 years ago)

Author:

rhl

Message:

[Start to] provide symbolic names for parameters

File:

• trunk/psphot/src/models/pmModel_QGAUSS.c (modified) (5 diffs)

trunk/psphot/src/models/pmModel_QGAUSS.c

@@ -26 +26 @@
     psF32 *PAR = params->data.F32;
 
-    psF32 X  = x->data.F32[0] - PAR[2];
-    psF32 Y  = x->data.F32[1] - PAR[3];
-    psF32 px = PAR[4]*X;
-    psF32 py = PAR[5]*Y;
-    psF32 z  = 0.5*PS_SQR(px) + 0.5*PS_SQR(py) + PAR[6]*X*Y;
+    psF32 X  = x->data.F32[0] - PAR[PM_PAR_XPOS];
+    psF32 Y  = x->data.F32[1] - PAR[PM_PAR_YPOS];
+    psF32 px = PAR[PM_PAR_SXX]*X;
+    psF32 py = PAR[PM_PAR_SYY]*Y;
+    psF32 z  = 0.5*PS_SQR(px) + 0.5*PS_SQR(py) + PAR[PM_PAR_SXY]*X*Y;
 
-    psF32 r  = 1.0 / (1 + PAR[7]*z + pow(z, QG_S1));
-    psF32 f  = PAR[1]*r + PAR[0];
+    psF32 r  = 1.0 / (1 + PAR[PM_PAR_7]*z + pow(z, QG_S1));
+    psF32 f  = PAR[PM_PAR_FLUX]*r + PAR[PM_PAR_SKY];
 
     if (deriv != NULL) {
         // note difference from a pure gaussian: q = params->data.F32[1]*r
-        psF32 t = PAR[1]*r*r;
-        psF32 q = t*(PAR[7] + QG_S1*pow(z, dQG_S1));
+        psF32 t = PAR[PM_PAR_FLUX]*r*r;
+        psF32 q = t*(PAR[PM_PAR_7] + QG_S1*pow(z, dQG_S1));
 
         deriv->data.F32[0] = +1.0;
         deriv->data.F32[1] = +r;
-        deriv->data.F32[2] = q*(2.0*px*PAR[4] + PAR[6]*Y);
-        deriv->data.F32[3] = q*(2.0*py*PAR[5] + PAR[6]*X);
+        deriv->data.F32[2] = q*(2.0*px*PAR[PM_PAR_SXX] + PAR[PM_PAR_SXY]*Y);
+        deriv->data.F32[3] = q*(2.0*py*PAR[PM_PAR_SYY] + PAR[PM_PAR_SXY]*X);
         deriv->data.F32[4] = -2.0*q*px*X;
         deriv->data.F32[5] = -2.0*q*py*Y;
@@ -111 +111 @@
     psF32 *PAR = params->data.F32;
 
-    psF64 A1   = PS_SQR(PAR[4]);
-    psF64 A2   = PS_SQR(PAR[5]);
-    psF64 A3   = PS_SQR(PAR[6]);
+    psF64 A1   = PS_SQR(PAR[PM_PAR_SXX]);
+    psF64 A2   = PS_SQR(PAR[PM_PAR_SYY]);
+    psF64 A3   = PS_SQR(PAR[PM_PAR_SXY]);
     psF64 Area = 2.0 * M_PI / sqrt(A1*A2 - A3);
     // Area is equivalent to 2 pi sigma^2
@@ -120 +120 @@
     norm = 0.0;
     for (z = 0.005; z < 50; z += 0.01) {
-        f = 1.0 / (1 + PAR[7]*z + pow(z, QG_S1));
+        f = 1.0 / (1 + PAR[PM_PAR_7]*z + pow(z, QG_S1));
         norm += f;
     }
     norm *= 0.01;
     
-    psF64 Flux = PAR[1] * Area * norm;
+    psF64 Flux = PAR[PM_PAR_FLUX] * Area * norm;
 
     return(Flux);
@@ -138 +138 @@
 
     if (flux <= 0) return (1.0);
-    if (PAR[1] <= 0) return (1.0);
-    if (flux >= PAR[1]) return (1.0);
+    if (PAR[PM_PAR_FLUX] <= 0) return (1.0);
+    if (flux >= PAR[PM_PAR_FLUX]) return (1.0);
 
     // if Sx == Sy, sigma = Sx == Sy
-    psF64 sigma = hypot (1.0 / PAR[4], 1.0 / PAR[5]) / sqrt(2.0);
+    psF64 sigma = hypot (1.0 / PAR[PM_PAR_SXX], 1.0 / PAR[PM_PAR_SYY]) / sqrt(2.0);
     psF64 dz = 1.0 / (2.0 * sigma*sigma);
-    psF64 limit = flux / PAR[1];
+    psF64 limit = flux / PAR[PM_PAR_FLUX];
 
     // we can do this much better with intelligent choices here
     for (z = 0.0; z < 20.0; z += dz) {
-        f = 1.0 / (1 + PAR[7]*z + pow(z, QG_S1));
+        f = 1.0 / (1 + PAR[PM_PAR_7]*z + pow(z, QG_S1));
         if (f < limit) break;
     }
@@ -184 +184 @@
 
     dP = 0;
-    dP += PS_SQR(dPAR[4] / PAR[4]);
-    dP += PS_SQR(dPAR[5] / PAR[5]);
+    dP += PS_SQR(dPAR[PM_PAR_SXX] / PAR[PM_PAR_SXX]);
+    dP += PS_SQR(dPAR[PM_PAR_SYY] / PAR[PM_PAR_SYY]);
     dP = sqrt (dP);
 
     status = true;
     status &= (dP < 0.5);
-    status &= (PAR[1] > 0);
-    status &= ((dPAR[1]/PAR[1]) < 0.5);
+    status &= (PAR[PM_PAR_FLUX] > 0);
+    status &= ((dPAR[PM_PAR_FLUX]/PAR[PM_PAR_FLUX]) < 0.5);
 
     if (status) return true;