48 lines
1.7 KiB
C++
48 lines
1.7 KiB
C++
#include "gmt.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 table_name = "table.txt";
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std::string grid_name = "table.nc";
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// Initiate a new GMT session
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void *API = GMT_Create_Session("gridding_example", 2U, 0, NULL);
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// Read table file from disk
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struct GMT_DATASET *D = reinterpret_cast<GMT_DATASET*>(
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GMT_Read_Data (API, GMT_IS_DATASET, GMT_IS_FILE, GMT_IS_PLP, GMT_READ_NORMAL, NULL, table_name.c_str(), NULL));
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// load dataset to a virtual file for gridding
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// length of a GMT virtual file's name must be GMT_VF_LEN
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char table_vir_file[GMT_VF_LEN] = {""};
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GMT_Open_VirtualFile(API, GMT_IS_DATASET, GMT_IS_PLP, GMT_IN, D, table_vir_file);
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// create a virtual file to hold result
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char grid_vir_file[GMT_VF_LEN] = {""};
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GMT_Open_VirtualFile(API, GMT_IS_GRID, GMT_IS_SURFACE, GMT_OUT, NULL, grid_vir_file);
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// prepare CMD arguments for the gridding module
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std::string table_vir_file_str = table_vir_file;
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std::string grid_vir_file_str = grid_vir_file;
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std::string args_gridding = "-R0/1000/0/1000 -I10 -D1 -St0.3 " + table_vir_file_str + " -G" + grid_vir_file_str;
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// call the greenspline module for gridding
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GMT_Call_Module(API, "greenspline", GMT_MODULE_CMD, (char*) args_gridding.c_str());
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// get grid file from the virtual file for outputting
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struct GMT_GRID *G = reinterpret_cast<GMT_GRID*>(
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GMT_Read_VirtualFile(API, grid_vir_file));
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// write the grid to file
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GMT_Write_Data(API, GMT_IS_GRID, GMT_IS_FILE, GMT_IS_SURFACE, GMT_READ_NORMAL, NULL,
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grid_name.c_str(), G);
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// close virtual files
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GMT_Close_VirtualFile (API, table_vir_file);
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GMT_Close_VirtualFile (API, grid_vir_file);
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// end the GMT session
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GMT_Destroy_Session(API);
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return 0;
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} |