84 lines
2.6 KiB
C++
84 lines
2.6 KiB
C++
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#include "gmt.h"
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#include "stdio.h"
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#include "unistd.h"
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#include "iostream"
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#include "string"
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int main(int argc, char *argv[])
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{
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std::string cpt_file = "user.cpt";
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std::string ps_file = "user.ps";
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// Initiate a new GMT session
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// you need to destroy the session later
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void *API = GMT_Create_Session("plot_grid_example", 2U, 0, NULL);
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struct GMT_GRID *G = reinterpret_cast<GMT_GRID*>(
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GMT_Read_Data (API, GMT_IS_GRID, GMT_IS_FILE, GMT_IS_SURFACE,
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GMT_READ_NORMAL, NULL, "table.nc", NULL));
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// start the plotting
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// 1. set GMT defaults
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std::string args_defaults = "FONT_ANNOT_PRIMARY=10.5p,Times-Roman,black \
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MAP_FRAME_PEN=thinnest,black \
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MAP_GRID_PEN_PRIMARY=thinnest,black \
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MAP_TICK_PEN_PRIMARY=thinnest,black \
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MAP_TICK_LENGTH_PRIMARY=1p/0.5p \
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MAP_TITLE_OFFSET=7.5p \
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MAP_GRID_CROSS_SIZE_PRIMARY=2p \
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FONT_LABEL=10.5p,Times-Roman,black \
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MAP_LABEL_OFFSET=5p \
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MAP_ANNOT_OFFSET_PRIMARY=2.5p";
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// call gmtset
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GMT_Call_Module (API, "gmtset", GMT_MODULE_CMD, (char*) args_defaults.c_str());
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// load the grid to a virtual file for plotting
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char grid_name[GMT_STR16] = {""};
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GMT_Open_VirtualFile (API, GMT_IS_GRID, GMT_IS_SURFACE, GMT_IN, G, grid_name);
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// get string type of grid name
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std::string grid_name_str = grid_name;
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// prepare cpt file
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std::string args_cpt = grid_name_str + " -Crainbow -R0/1000/0/1000 -Z -D ->" + cpt_file;
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// call grd2cpt
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GMT_Call_Module (API, "grd2cpt", GMT_MODULE_CMD, (char*) args_cpt.c_str());
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// plot the image
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std::string args_image = grid_name_str + " -R0/1000/0/1000 -C" + cpt_file +
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" -Bxag+l\"x (m)\" -Byag+l\"y (m)\" -JX1.5i/1.5i -X1.5i -Y1.5i -K -P --MAP_FRAME_AXES=WesNZ ->" + ps_file;
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// call grdimage
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GMT_Call_Module (API, "grdimage", GMT_MODULE_CMD, (char*) args_image.c_str());
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// plot color bar
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std::string args_bar = "-Dx0.1i/-0.2i+w1.3i/0.05i+h -C" + cpt_file +
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" -Bxa -By+lm -O -)" + ps_file;
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// call psscale
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GMT_Call_Module (API, "psscale", GMT_MODULE_CMD, (char*) args_bar.c_str());
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// convert ps file to raster formats
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std::string args_pic = ps_file + " -A -TEG -E300";
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// call psconvert
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GMT_Call_Module (API, "psconvert", GMT_MODULE_CMD, (char*) args_pic.c_str());
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// close virtual file
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GMT_Close_VirtualFile (API, grid_name);
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// destroy data container
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GMT_Destroy_Data(API, G);
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// end the GMT session
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GMT_Destroy_Session(API);
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// remove temporary files. including GMT defaults
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remove(cpt_file.c_str());
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remove(ps_file.c_str());
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// if exist, delete
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std::string hist_file = "gmt.history";
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std::string conf_file = "gmt.conf";
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if (!access(hist_file.c_str(), F_OK))
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remove(hist_file.c_str());
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if (!access(conf_file.c_str(), F_OK))
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remove(conf_file.c_str());
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return 0;
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}
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