Atlas - testsensor.c
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[FILE BEGIN]
1/*
2  Copyright (C) 1997-2018 Sam Lantinga <[email protected]>
3
4  This software is provided 'as-is', without any express or implied
5  warranty.  In no event will the authors be held liable for any damages
6  arising from the use of this software.
7
8  Permission is granted to anyone to use this software for any purpose,
9  including commercial applications, and to alter it and redistribute it
10  freely.
11*/
12
13/* Simple test of the SDL sensor code */
14
15#include "SDL.h"
16
17static const char *GetSensorTypeString(SDL_SensorType type)
18{
19    static char unknown_type[64];
20
21    switch (type)
22    {
23    case SDL_SENSOR_INVALID:
24        return "SDL_SENSOR_INVALID";
25    case SDL_SENSOR_UNKNOWN:
26        return "SDL_SENSOR_UNKNOWN";
27    case SDL_SENSOR_ACCEL:
28        return "SDL_SENSOR_ACCEL";
29    case SDL_SENSOR_GYRO:
30        return "SDL_SENSOR_GYRO";
31    default:
32        SDL_snprintf(unknown_type, sizeof(unknown_type), "UNKNOWN (%d)", type);
33        return unknown_type;
34    }
35}
36
37static void HandleSensorEvent(SDL_SensorEvent *event)
38{
39    SDL_Sensor *sensor = SDL_SensorFromInstanceID(event->which);
40    if (!sensor) {
41        SDL_Log("Couldn't get sensor for sensor event\n");
42        return;
43    }
44
45    switch (SDL_SensorGetType(sensor)) {
46    case SDL_SENSOR_ACCEL:
47        SDL_Log("Accelerometer update: %.2f, %.2f, %.2f\n", event->data[0], event->data[1], event->data[2]);
48        break;
49    case SDL_SENSOR_GYRO:
50        SDL_Log("Gyro update: %.2f, %.2f, %.2f\n", event->data[0], event->data[1], event->data[2]);
51        break;
52    default:
53        SDL_Log("Sensor update for sensor type %s\n", GetSensorTypeString(SDL_SensorGetType(sensor)));
54        break;
55    }
56}
57
58int
59main(int argc, char **argv)
60{
61    int i;
62    int num_sensors, num_opened;
63
64    /* Load the SDL library */
65    if (SDL_Init(SDL_INIT_SENSOR) < 0) {
66        SDL_Log("Couldn't initialize SDL: %s\n", SDL_GetError());
67        return (1);
68    }
69
70    num_sensors = SDL_NumSensors();
71    num_opened = 0;
72
73    SDL_Log("There are %d sensors available\n", num_sensors);
74    for (i = 0; i < num_sensors; ++i) {
75        SDL_Log("Sensor %d: %s, type %s, platform type %d\n",
76            SDL_SensorGetDeviceInstanceID(i),
77            SDL_SensorGetDeviceName(i),
78            GetSensorTypeString(SDL_SensorGetDeviceType(i)),
79            SDL_SensorGetDeviceNonPortableType(i));
80
81        if (SDL_SensorGetDeviceType(i) != SDL_SENSOR_UNKNOWN) {
82            SDL_Sensor *sensor = SDL_SensorOpen(i);
83            if (sensor == NULL) {
84                SDL_Log("Couldn't open sensor %d: %s\n", SDL_SensorGetDeviceInstanceID(i), SDL_GetError());
85            } else {
86                ++num_opened;
87            }
88        }
89    }
90    SDL_Log("Opened %d sensors\n", num_opened);
91
92    if (num_opened > 0) {
93        SDL_bool done = SDL_FALSE;
94        SDL_Event event;
95
96        SDL_CreateWindow("Sensor Test", 0, 0, 0, 0, SDL_WINDOW_FULLSCREEN_DESKTOP);
97        while (!done) {
98            while (SDL_PollEvent(&event) > 0) {
99                switch (event.type) {
100                case SDL_SENSORUPDATE:
101                    HandleSensorEvent(&event.sensor);
102                    break;
103                case SDL_MOUSEBUTTONUP:
104                case SDL_KEYUP:
105                case SDL_QUIT:
106                    done = SDL_TRUE;
107                    break;
108                default:
109                    break;
110                }
111            }
112        }
113    }
114
115    SDL_Quit();
116    return (0);
117}
118
[FILE END]
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