better estimation

rayw000 · rayw000 · commit b284bb406ddc · 2022-02-10T18:10:04.000+08:00
diff --git a/src/core/modules/GridLinesMgr.cpp b/src/core/modules/GridLinesMgr.cpp
@@ -1315,11 +1315,11 @@ void SkyLine::draw(StelCore *core) const
 					double step;
 					if(i<81||i>268)
 					{
-						step = 1.0*M_PI/178.;
+						step = 1.0*M_PI/(daysOfYear - 187.);
 					}
 					else
 					{
-						step = 1.0*M_PI/(daysOfYear - 178.);
+						step = 1.0*M_PI/187.;
 					}
 					const Mat4d& rotZ1 = Mat4d::rotation(partZAxis, step);
 					partNewYear.transfo4d(rotZ1);

Original file line number	Diff line number	Diff line change
`@@ -1315,11 +1315,11 @@ void SkyLine::draw(StelCore *core) const`
`1315`	`1315`	`double step;`
`1316`	`1316`	`if(i<81\|\|i>268)`
`1317`	`1317`	`{`
`1318`		`- step = 1.0*M_PI/178.;`
	`1318`	`+ step = 1.0*M_PI/(daysOfYear - 187.);`
`1319`	`1319`	`}`
`1320`	`1320`	`else`
`1321`	`1321`	`{`
`1322`		`- step = 1.0*M_PI/(daysOfYear - 178.);`
	`1322`	`+ step = 1.0*M_PI/187.;`
`1323`	`1323`	`}`
`1324`	`1324`	`const Mat4d& rotZ1 = Mat4d::rotation(partZAxis, step);`
`1325`	`1325`	`partNewYear.transfo4d(rotZ1);`