testapi_matrix_plot.c

/*
 * Testing the passing of a GMT_MATRIX via GRID to grd plotters.
 */
#include "gmt.h"

int main () {
	void *API = NULL;                /* The API control structure */
	struct GMT_MATRIX *M = NULL;    /* Structure to hold input matrix */
	char input[GMT_VF_LEN] = {""};	/* String to hold virtual input filename */
	char args[128] = {""};         	/* String to hold module command arguments */
	/* Initialize the GMT session */
	API = GMT_Create_Session ("test", 0U, GMT_SESSION_EXTERNAL, NULL);
	M = GMT_Read_Data (API, GMT_IS_MATRIX, GMT_IS_FILE, GMT_IS_POINT, GMT_READ_NORMAL, NULL, "@matrix_grid.txt", NULL);
	/* Associate our matrix with a virtual file */
	GMT_Open_VirtualFile (API, GMT_IS_GRID|GMT_VIA_MATRIX, GMT_IS_SURFACE, GMT_IN|GMT_IS_REFERENCE, M, input);
	/* Prepare the module arguments */
	sprintf (args, "%s -JM6i -P -Baf -Ei -I+d", input);
	/* Call the grdimage module */
	GMT_Call_Module (API, "grdimage", GMT_MODULE_CMD, args);
	/* Close the virtual file */
	GMT_Close_VirtualFile (API, input);
	/* Destroy session */
	if (GMT_Destroy_Session (API)) return EXIT_FAILURE;
};