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57 lines
1.7 KiB
C++
57 lines
1.7 KiB
C++
#include <tobii/tobii.h>
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#include <tobii/tobii_streams.h>
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#include <stdio.h>
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#include <assert.h>
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#include <cstring>
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void gaze_point_callback(tobii_gaze_point_t const *gaze_point, void *user_data) {
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if (gaze_point->validity == TOBII_VALIDITY_VALID)
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printf("Gaze point: %f, %f\n",
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gaze_point->position_xy[0],
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gaze_point->position_xy[1]);
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}
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static void url_receiver(char const *url, void *user_data) {
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char *buffer = (char *) user_data;
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if (*buffer != '\0') return; // only keep first value
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if (strlen(url) < 256)
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strcpy(buffer, url);
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}
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int main() {
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tobii_api_t *api;
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tobii_error_t error = tobii_api_create(&api, NULL, NULL);
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assert(error == TOBII_ERROR_NO_ERROR);
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char url[256] = {0};
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error = tobii_enumerate_local_device_urls(api, url_receiver, url);
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assert(error == TOBII_ERROR_NO_ERROR && *url != '\0');
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tobii_device_t *device;
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error = tobii_device_create(api, url, &device);
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assert(error == TOBII_ERROR_NO_ERROR);
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error = tobii_gaze_point_subscribe(device, gaze_point_callback, 0);
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assert(error == TOBII_ERROR_NO_ERROR);
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int is_running = 1000; // in this sample, exit after some iterations
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while (--is_running > 0) {
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error = tobii_wait_for_callbacks(1, &device);
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assert(error == TOBII_ERROR_NO_ERROR || error == TOBII_ERROR_TIMED_OUT);
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error = tobii_device_process_callbacks(device);
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assert(error == TOBII_ERROR_NO_ERROR);
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}
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error = tobii_gaze_point_unsubscribe(device);
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assert(error == TOBII_ERROR_NO_ERROR);
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error = tobii_device_destroy(device);
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assert(error == TOBII_ERROR_NO_ERROR);
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error = tobii_api_destroy(api);
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assert(error == TOBII_ERROR_NO_ERROR);
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return 0;
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} |