Converted Compact Miller projection

2 files changed, 102 insertions, 32 deletions

diff --git a/src/PJ_aea.c b/src/PJ_aea.c
index 52510360..65b001b4 100644
--- a/src/PJ_aea.c
+++ b/src/PJ_aea.c
@@ -357,7 +357,6 @@ int pj_aeqd_selftest     (void)     {return 10000;}
 int pj_alsk_selftest     (void)     {return 10000;}
 
 int pj_chamb_selftest    (void)     {return 10000;}
-int pj_comill_selftest   (void)     {return 10000;}
 int pj_crast_selftest    (void)     {return 10000;}
 int pj_denoy_selftest    (void)     {return 10000;}
 int pj_eck1_selftest     (void)     {return 10000;}
diff --git a/src/PJ_comill.c b/src/PJ_comill.c
index ad9914d4..f84f4eb0 100644
--- a/src/PJ_comill.c
+++ b/src/PJ_comill.c
@@ -1,13 +1,14 @@
 /*
-The Compact Miller projection was designed by Tom Patterson, US National 
-Park Service, in 2014. The polynomial equation was developed by Bojan 
-Savric and Bernhard Jenny, College of Earth, Ocean, and Atmospheric 
+The Compact Miller projection was designed by Tom Patterson, US National
+Park Service, in 2014. The polynomial equation was developed by Bojan
+Savric and Bernhard Jenny, College of Earth, Ocean, and Atmospheric
 Sciences, Oregon State University.
 Port to PROJ.4 by Bojan Savric, 4 April 2016
 */
 
 #define PJ_LIB__
-#include	<projects.h>
+#include    <projects.h>
+
 PROJ_HEAD(comill, "Compact Miller") "\n\tCyl., Sph.";
 
 #define K1 0.9902
@@ -19,41 +20,111 @@ PROJ_HEAD(comill, "Compact Miller") "\n\tCyl., Sph.";
 #define EPS 1e-11
 #define MAX_Y (0.6000207669862655 * PI)
 
-FORWARD(s_forward); /* spheroid */
-	double lat_sq;
 
-	lat_sq = lp.phi * lp.phi;
-	xy.x = lp.lam;
-	xy.y = lp.phi * (K1 + lat_sq * (K2 + K3 * lat_sq));
-    return (xy);
+static XY s_forward (LP lp, PJ *P) {           /* Spheroidal, forward */
+    XY xy = {0.0,0.0};
+    double lat_sq;
+
+    lat_sq = lp.phi * lp.phi;
+    xy.x = lp.lam;
+    xy.y = lp.phi * (K1 + lat_sq * (K2 + K3 * lat_sq));
+    return xy;
 }
-INVERSE(s_inverse); /* spheroid */
-	double yc, tol, y2, y4, f, fder;
+
+
+static LP s_inverse (XY xy, PJ *P) {           /* Spheroidal, inverse */
+    LP lp = {0.0,0.0};
+    double yc, tol, y2, y4, f, fder;
 
     /* make sure y is inside valid range */
-	if (xy.y > MAX_Y) {
-		xy.y = MAX_Y;
-	} else if (xy.y < -MAX_Y) {
-		xy.y = -MAX_Y;
-	}
+    if (xy.y > MAX_Y) {
+        xy.y = MAX_Y;
+    } else if (xy.y < -MAX_Y) {
+        xy.y = -MAX_Y;
+    }
 
     /* latitude */
-	yc = xy.y;
+    yc = xy.y;
     for (;;) { /* Newton-Raphson */
-		y2 = yc * yc;
-		f = (yc * (K1 + y2 * (K2 + K3 * y2))) - xy.y;
-		fder = C1 + y2 * (C2 + C3 * y2);
-		yc -= tol = f / fder;
-		if (fabs(tol) < EPS) {
-			break;
-		}
-	}
-	lp.phi = yc;
+        y2 = yc * yc;
+        f = (yc * (K1 + y2 * (K2 + K3 * y2))) - xy.y;
+        fder = C1 + y2 * (C2 + C3 * y2);
+        yc -= tol = f / fder;
+        if (fabs(tol) < EPS) {
+            break;
+        }
+    }
+    lp.phi = yc;
 
     /* longitude */
-	lp.lam = xy.x;
+    lp.lam = xy.x;
+
+    return lp;
+}
+
+static void *freeup_new (PJ *P) {                       /* Destructor */
+    return pj_dealloc(P);
+}
+
+static void freeup (PJ *P) {
+    freeup_new (P);
+    return;
+}
+
+
+PJ *PROJECTION(comill) {
+    P->es = 0;
+
+    P->inv = s_inverse;
+    P->fwd = s_forward;
 
-	return (lp);
+    P->pfree = freeup;
+    P->descr = des_comill;
+
+    return P;
 }
-FREEUP; if (P) pj_dalloc(P); }
-ENTRY0(comill) P->es = 0; P->inv = s_inverse; P->fwd = s_forward; ENDENTRY(P)
+
+
+#ifdef PJ_OMIT_SELFTEST
+int pj_comill_selftest (void) {return 0;}
+#else
+
+int pj_comill_selftest (void) {
+    double tolerance_lp = 1e-10;
+    double tolerance_xy = 1e-7;
+
+    char s_args[] = {"+proj=comill   +a=6400000    +lat_1=0.5 +lat_2=2"};
+
+    LP fwd_in[] = {
+        { 2, 1},
+        { 2,-1},
+        {-2, 1},
+        {-2,-1}
+    };
+
+    XY s_fwd_expect[] = {
+        {223402.144255274179,  110611.859089458536},
+        {223402.144255274179,  -110611.859089458536},
+        {-223402.144255274179,  110611.859089458536},
+        {-223402.144255274179,  -110611.859089458536},
+    };
+
+    XY inv_in[] = {
+        { 200, 100},
+        { 200,-100},
+        {-200, 100},
+        {-200,-100}
+    };
+
+    LP s_inv_expect[] = {
+        {0.00179049310978382265,  0.000904106801510605831},
+        {0.00179049310978382265,  -0.000904106801510605831},
+        {-0.00179049310978382265,  0.000904106801510605831},
+        {-0.00179049310978382265,  -0.000904106801510605831},
+    };
+
+    return pj_generic_selftest (0, s_args, tolerance_xy, tolerance_lp, 4, 4, fwd_in, 0, s_fwd_expect, inv_in, 0, s_inv_expect);
+}
+
+
+#endif