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-Xc -Yc and -pz fail to center plot #9045

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Merged
joa-quim merged 1 commit into from
May 28, 2026
+15 −3
Merged

-Xc -Yc and -pz fail to center plot #9045

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18 changes: 15 additions & 3 deletions src/gmt_plot.c
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Original file line number Diff line number Diff line change
Expand Up @@ -9159,10 +9159,22 @@ struct PSL_CTRL *gmt_plotinit (struct GMT_CTRL *GMT, struct GMT_OPTION *options)
if (!GMT->common.X.active && O_active) GMT->current.setting.map_origin[GMT_X] = 0.0;
if (!GMT->common.Y.active && O_active) GMT->current.setting.map_origin[GMT_Y] = 0.0;

/* Adjust offset when centering plot on center of page (PS does the rest) */
/* Adjust offset when centering plot on center of page (PS does the rest).
* For perspective plots (-p) the on-paper bounding box is given by z_project.[xy]{min,max},
* not by map.width/height, so use that to center the actual perspective footprint. */

if (GMT->current.ps.origin[GMT_X] == 'c') GMT->current.setting.map_origin[GMT_X] -= 0.5 * GMT->current.map.width;
if (GMT->current.ps.origin[GMT_Y] == 'c') GMT->current.setting.map_origin[GMT_Y] -= 0.5 * GMT->current.map.height;
if (GMT->current.ps.origin[GMT_X] == 'c') {
if (GMT->current.proj.three_D)
GMT->current.setting.map_origin[GMT_X] -= 0.5 * (GMT->current.proj.z_project.xmin + GMT->current.proj.z_project.xmax);
else
GMT->current.setting.map_origin[GMT_X] -= 0.5 * GMT->current.map.width;
}
if (GMT->current.ps.origin[GMT_Y] == 'c') {
if (GMT->current.proj.three_D)
GMT->current.setting.map_origin[GMT_Y] -= 0.5 * (GMT->current.proj.z_project.ymin + GMT->current.proj.z_project.ymax);
else
GMT->current.setting.map_origin[GMT_Y] -= 0.5 * GMT->current.map.height;
}

/* Get font names used */

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