root / org.gvsig.jcrs / libjni-proj4 / src / PJ_wag3.c @ 36
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1 | 36 | jjdelcerro | #ifndef lint
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2 | static const char SCCSID[]="@(#)PJ_wag3.c 4.1 94/02/15 GIE REL"; |
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3 | #endif
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4 | #define PROJ_PARMS__ \
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5 | double C_x;
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6 | #define PJ_LIB__
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7 | # include <projects.h> |
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8 | PROJ_HEAD(wag3, "Wagner III") "\n\tPCyl., Sph."; |
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9 | #define TWOTHIRD 0.6666666666666666666667 |
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10 | FORWARD(s_forward); /* spheroid */
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11 | xy.x = P->C_x * lp.lam * cos(TWOTHIRD * lp.phi); |
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12 | xy.y = lp.phi; |
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13 | return (xy);
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14 | } |
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15 | INVERSE(s_inverse); /* spheroid */
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16 | lp.phi = xy.y; |
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17 | lp.lam = xy.x / (P->C_x * cos(TWOTHIRD * lp.phi)); |
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18 | return (lp);
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19 | } |
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20 | FREEUP; if (P) pj_dalloc(P); }
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21 | ENTRY0(wag3) |
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22 | double ts;
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23 | |||
24 | ts = pj_param(P->params, "rlat_ts").f;
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25 | P->C_x = cos(ts) / cos(2.*ts/3.); |
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26 | P->es = 0.; P->inv = s_inverse; P->fwd = s_forward;
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27 | ENDENTRY(P) |