So I have most of my game finish up however, I want to save the score and name of the player to a text file and display it. So far the user input works and does save to a text file named score.txt however the input is invisible and you can't see what you are typing. Does anyone know why this is happening?
Main
int main()
{
DWORD mode; /* Preserved console mode */
INPUT_RECORD event; /* Input event */
BOOL EXITGAME = FALSE; /* Program termination flag */
unsigned int counter = 0; /* The number of times 'Esc' is pressed */
/* Get the console input handle */
HANDLE hstdin = GetStdHandle( STD_INPUT_HANDLE );
/* Preserve the original console mode */
GetConsoleMode( hstdin, &mode );
/* Set to no line-buffering, no echo, no special-key-processing */
SetConsoleMode( hstdin, 0 );
srand ( time(NULL) ); //initialize the random seed
// Variables
int health = 2;
// Declare variable positions
player.x=1;
player.y=1;
treasure.x = 20;
treasure.y = 5;
treasure.z= 0;
traps.x = 1;
traps.y = 7;
traps.z = 0;
lives.x = 1;
lives.y = 9;
ofstream file;
int score = 0;
string name;
string line;
/*
while(treasure.z < 2)
{
treasure.x = (rand() % 24);
treasure.y = (rand() % 16);
if(treasure.x == 0 && treasure.y == 0)
{
treasure.z++;
}
}
while(traps.z < 3)
{
traps.x = (rand() % 24);
traps.y = (rand() % 16);
if(traps.x == 0 && traps.y == 0)
{
traps.z++;
}
}
while(lives.z < 2)
{
lives.x = (rand() % 24);
lives.y = (rand() % 16);
}
*/
clrscr();
setcolor(15);
while (!EXITGAME)
{
if (WaitForSingleObject( hstdin, 0 ) == WAIT_OBJECT_0) /* if kbhit */
{
DWORD count; /* ignored */
/* Get the input event */
ReadConsoleInput( hstdin, &event, 1, &count );
/* Only respond to key release events */
if ((event.EventType == KEY_EVENT)
&& !event.Event.KeyEvent.bKeyDown)
clrscr();
putmenu();
gotoxy(6,20);
cout<<"Lives: " << health;
gotoxy(6,22);
cout<<"Score: " << score;
Sleep(50);
switch (event.Event.KeyEvent.wVirtualKeyCode)
{
case VK_ESCAPE:
clrscr();
putend();
EXITGAME = TRUE;
break;
case VK_LEFT:
// left key move player left
moveleft();
break;
case VK_RIGHT:
// right key move player right
moveright();
break;
case VK_UP:
// up key move player up
moveup();
break;
case VK_DOWN:
// down key move player down
movedown();
break;
case VK_A:
// left key move player left
moveleft();
break;
case VK_D:
// right key move player right
moveright();
break;
case VK_W:
// up key move player up
moveup();
break;
case VK_S:
// down key move player down
movedown();
break;
}//switch
puttreasure();
puttraps();
putlives();
putplayer();
if((player.x == lives.x) && (player.y == lives.y))
{
health++;
lives.x = 0;
lives.y = 0;
}
if((player.x == traps.x) && (player.y == traps.y))
{
health--;
traps.x = 0;
traps.y = 0;
}
if((player.x == treasure.x)&& (player.y == treasure.y))
{
score += 100;
EXITGAME = true;
}
else if(health == 0)
{
EXITGAME = true;
}
if(EXITGAME == true)
{
score = score + (health * 100);
}
}
}
if(EXITGAME == true)
{
// clear screen
clrscr();
}
setcolor(10);
cout << "Enter your name ";
cin >> name;
ofstream out("score.txt");
out << name;
out << "\n";
out << score;
out.close();
/* if(file.is_open())
{
while( getline (file, line))
cout << line << '\n';
}*/
gotoxy(1,23);cout<<" ";
SetConsoleMode( hstdin, mode );
return 0;
}
/* Set to no line-buffering, no echo, no special-key-processing */
You turned off echo - means that the user wont see what they type
Related
I am trying to recompile an old Win32 software package in order to bring small modifications.
The package is part of the MT SDK from Xsens and allows to get output from a inertial sensor (available here https://content.xsens.com/hubfs/Downloads/Software/mtsdk3.3_setup.zip). Example of a C++ routine using a DLL file responsible for the communication with hardware is located in Program Files\Xsens\MT SDK\Software Developpement\Examples\CMT Example Dll.
From directory I recompiled the source code, linking the DLL such as
i686-w64-mingw32-g++ -o test main.cpp -L. -lxsens_cmt
It requires changing a few scanf_s calls to scanf but compiled properly into test.exe.
However, when I try to run that executable in Windows I get the following error:
enter image description here
On the net I could find recommendation to compile with the following options but none could resolve my issue :
-static
-static-libstdc++
-static-libgcc
Examples folder of the MTSDK can be downloaded here if you don't want to install the software :
https://gitlab.com/lenhofed/mtsdk_modifs.git
main.cpp
/* demo key, replace this key with your own */
#define KEY "b8r6RCoGjQJVsytwUMo8WCRiJiVCCdoL11cCj4HqnaKPHtTn"
#include <stdio.h> // Needed for printf etc
#include <objbase.h> // Needed for COM functionality
#include "xsens_cmt.h"
#include <conio.h> // included for _getch and _kbhit
#include "main.h"
// this macro tests for an error and exits the program with a message if there was one
#define EXIT_ON_ERROR(res,comment) if (res != XRV_OK) { printf("Error %d occurred in " comment ": %s\n",res,cmtGetResultText(res)); exit(1); }
long instance = -1;
// used to signal that the user initiated the exit, so we do not wait for an extra keypress-
int userQuit = 0;
CmtOutputMode mode;
CmtOutputSettings settings;
unsigned short mtCount = 0;
int screenSensorOffset = 0;
int temperatureOffset = 0;
CmtDeviceId deviceIds[256];
CmtVector positionLLA;
int main(void)
{
XsensResultValue res = XRV_OK;
short screenSkipFactor = 10;
short screenSkipFactorCnt = screenSkipFactor;
// Set exit function
atexit(exitFunc);
// lets create the Xsens CMT instance to handle the sensor(s)
printf("Creating an XsensCMT instance\n");
char serialNumber[] = KEY;
if (strcmp(serialNumber,"b8r6RCoGjQJVsytwUMo8WCRiJiVCCdoL11cCj4HqnaKPHtTn") == 0)
printf("Warning: Using the demo key as a serial code will limit CMT functionality to 1000 calls. Enter your own serial code for unlimited CMT functionality.\n");
instance = cmtCreateInstance(serialNumber);
if (instance != -1)
printf("CMT instance created\n\n");
else {
printf("Creation of CMT instance failed, probably because of an invalid serial number\n");
exit(1);
}
// Perform hardware scan
doHardwareScan();
// Give user a (short) chance to see hardware scan results
Sleep(2000);
//clear screen present & get the user output mode selection.
clrscr();
getUserInputs();
// Set device to user input settings
doMtSettings();
// Wait for first data item(s) to arrive. In production code, you would use a callback function instead (see cmtRegisterCallback function)
Sleep(20);
//get the placement offsets, clear the screen and write the fixed headers.
calcScreenOffset();
clrscr();
writeHeaders();
// vars for sample counter & temp.
unsigned short sdata;
double tdata;
//structs to hold data.
CmtCalData caldata;
CmtQuat qat_data;
CmtEuler euler_data;
CmtMatrix matrix_data;
while(!userQuit && res == XRV_OK)
{
//get the bundle of data
res = cmtGetNextDataBundle(instance);
Sleep(10);
//get sample count, goto position & display.
res = cmtDataGetSampleCounter(instance, &sdata, deviceIds[0] ,NULL);
gotoxy(0,0);
printf("Sample Counter %05hu\n", sdata);
if (screenSkipFactorCnt++ == screenSkipFactor) {
screenSkipFactorCnt = 0;
for (unsigned int i = 0; i < mtCount; i++) {
// Output Temperature
if ((mode & CMT_OUTPUTMODE_TEMP) != 0) {
gotoxy(0,4 + i * screenSensorOffset);
res = cmtDataGetTemp(instance, &tdata, deviceIds[i],NULL);
printf("%6.2f", tdata);
}
gotoxy(0,5 + temperatureOffset + i * screenSensorOffset); // Output Calibrated data
if ((mode & CMT_OUTPUTMODE_CALIB) != 0) {
res = cmtDataGetCalData(instance, &caldata, deviceIds[i]);
printf("%6.2f\t%6.2f\t%6.2f" , caldata.m_acc.m_data[0], caldata.m_acc.m_data[1], caldata.m_acc.m_data[2]);
gotoxy(0,7 + temperatureOffset + i * screenSensorOffset);
printf("%6.2f\t%6.2f\t%6.2f", caldata.m_gyr.m_data[0], caldata.m_gyr.m_data[1], caldata.m_gyr.m_data[2] );
gotoxy(0,9 + temperatureOffset + i * screenSensorOffset);
printf("%6.2f\t%6.2f\t%6.2f",caldata.m_mag.m_data[0], caldata.m_mag.m_data[1], caldata.m_mag.m_data[2]);
gotoxy(0,13 + temperatureOffset + i * screenSensorOffset);
}
if ((mode & CMT_OUTPUTMODE_ORIENT) != 0) {
switch(settings & CMT_OUTPUTSETTINGS_ORIENTMODE_MASK) {
case CMT_OUTPUTSETTINGS_ORIENTMODE_QUATERNION:
// Output: quaternion
res = cmtDataGetOriQuat(instance, &qat_data, deviceIds[i]);
printf("%6.3f\t%6.3f\t%6.3f\t%6.3f\n", qat_data.m_data[0], qat_data.m_data[1],qat_data.m_data[2],qat_data.m_data[3]);
break;
case CMT_OUTPUTSETTINGS_ORIENTMODE_EULER:
// Output: Euler
res = cmtDataGetOriEuler(instance, &euler_data, deviceIds[i]);
printf("%6.1f\t%6.1f\t%6.1f\n", euler_data.m_roll,euler_data.m_pitch, euler_data.m_yaw);
break;
case CMT_OUTPUTSETTINGS_ORIENTMODE_MATRIX:
// Output: Cosine Matrix
res = cmtDataGetOriMatrix(instance, &matrix_data, deviceIds[i],NULL);
printf("%6.3f\t%6.3f\t%6.3f\n", matrix_data.m_data[0][0],matrix_data.m_data[0][1], matrix_data.m_data[0][2]);
printf("%6.3f\t%6.3f\t%6.3f\n", matrix_data.m_data[1][0],matrix_data.m_data[1][1], matrix_data.m_data[1][2]);
printf("%6.3f\t%6.3f\t%6.3f\n", matrix_data.m_data[2][0],matrix_data.m_data[2][1], matrix_data.m_data[2][2]);
break;
default:
;
}
}
if ((mode & CMT_OUTPUTMODE_POSITION) != 0) {
/* output position */
printf("\n\n");
if (cmtDataContainsPositionLLA(instance, deviceIds[i]) != 0) {
res = cmtDataGetPositionLLA(instance, &positionLLA, deviceIds[i]);
if (res != XRV_OK) {
printf("error %ud", res);
}
for (int i = 0; i < 2; i++) {
double deg = positionLLA.m_data[i];
double min = (deg - (int)deg)*60;
double sec = (min - (int)min)*60;
printf("%3d\xa7%2d\'%2.2lf\"\t", (int)deg, (int)min, sec);
}
printf(" %3.2lf\n", positionLLA.m_data[2]);
} else {
printf("No position data available\n");
}
}
}
}
if (_kbhit())
userQuit = 1;
}
clrscr();
cmtClose(instance);
return 0;
}
//////////////////////////////////////////////////////////////////////////
// doHardwareScan
//
// Checks available COM ports and scans for MotionTrackers
void doHardwareScan()
{
XsensResultValue res;
CmtPortInfo portInfo[256];
uint32_t portCount = 0;
printf("Scanning for connected Xsens devices...");
res = cmtScanPorts(portInfo, &portCount, 0);
EXIT_ON_ERROR(res,"cmtScanPorts");
printf("done\n");
if (portCount == 0) {
printf("No MotionTrackers found\n\n");
exit(0);
}
for(int i = 0; i < (int)portCount; i++) {
printf("Using COM port %d at %d baud\n\n",
(long) portInfo[i].m_portNr, portInfo[i].m_baudrate);
}
printf("Opening ports...");
//open the port which the device is connected to and connect at the device's baudrate.
for(int p = 0; p < (int)portCount; p++){
res = cmtOpenPort(instance, portInfo[p].m_portNr, portInfo[p].m_baudrate);
EXIT_ON_ERROR(res,"cmtOpenPort");
}
printf("done\n\n");
//get the Mt sensor count.
printf("Retrieving MotionTracker count (excluding attached Xbus Master(s))\n");
res = cmtGetMtCount(instance,&mtCount);
EXIT_ON_ERROR(res,"cmtGetMtCount");
printf("MotionTracker count: %i\n\n",mtCount);
// retrieve the device IDs
printf("Retrieving MotionTrackers device ID(s)\n");
for(unsigned int j = 0; j < mtCount; j++ ){
res = cmtGetMtDeviceId(instance, &deviceIds[j], j);
EXIT_ON_ERROR(res,"cmtGetDeviceId");
printf("Device ID at index %i: %08x\n",j,(long) deviceIds[j]);
}
// make sure that we get the freshest data
printf("\nSetting queue mode so that we always get the latest data\n\n");
res = cmtSetQueueMode(instance,CMT_QM_LAST);
EXIT_ON_ERROR(res,"cmtSetQueueMode");
}
//////////////////////////////////////////////////////////////////////////
// getUserInputs
//
// Request user for output data
void getUserInputs()
{
mode = 0;
while (mode < 1 || mode > 6) {
printf("Select desired output:\n");
printf("1 - Calibrated data\n");
printf("2 - Orientation data and GPS Position (MTi-G only)\n");
printf("3 - Both Calibrated and Orientation data\n");
printf("4 - Temperature and Calibrated data\n");
printf("5 - Temperature and Orientation data\n");
printf("6 - Temperature, Calibrated and Orientation data\n");
printf("Enter your choice: ");
scanf("%d", &mode);
// flush stdin
while (getchar() != '\n') continue;
if (mode < 1 || mode > 6) {
printf("\n\nPlease enter a valid output mode\n");
}
}
clrscr();
switch(mode)
{
case 1:
mode = CMT_OUTPUTMODE_CALIB;
break;
case 2:
mode = CMT_OUTPUTMODE_ORIENT | CMT_OUTPUTMODE_POSITION;
break;
case 3:
mode = CMT_OUTPUTMODE_CALIB | CMT_OUTPUTMODE_ORIENT;
break;
case 4:
mode = CMT_OUTPUTMODE_TEMP | CMT_OUTPUTMODE_CALIB;
break;
case 5:
mode = CMT_OUTPUTMODE_TEMP | CMT_OUTPUTMODE_ORIENT;
break;
case 6:
mode = CMT_OUTPUTMODE_TEMP | CMT_OUTPUTMODE_CALIB | CMT_OUTPUTMODE_ORIENT;
break;
}
if ((mode & CMT_OUTPUTMODE_ORIENT) != 0) {
do{
printf("Select desired output format\n");
printf("1 - Quaternions\n");
printf("2 - Euler angles\n");
printf("3 - Matrix\n");
printf("Enter your choice: ");
scanf("%d", &settings);
// flush stdin
while (getchar() != '\n') continue;
if (settings < 1 || settings > 3) {
printf("\n\nPlease enter a valid choice\n");
}
}while(settings < 1 || settings > 3);
// Update outputSettings to match data specs of SetOutputSettings
switch(settings) {
case 1:
settings = CMT_OUTPUTSETTINGS_ORIENTMODE_QUATERNION;
break;
case 2:
settings = CMT_OUTPUTSETTINGS_ORIENTMODE_EULER;
break;
case 3:
settings = CMT_OUTPUTSETTINGS_ORIENTMODE_MATRIX;
break;
}
}
else{
settings = 0;
}
settings |= CMT_OUTPUTSETTINGS_TIMESTAMP_SAMPLECNT;
}
//////////////////////////////////////////////////////////////////////////
// doMTSettings
//
// Set user settings in MTi/MTx
// Assumes initialized global MTComm class
void doMtSettings(void)
{
XsensResultValue res;
// set sensor to config sate
res = cmtGotoConfig(instance);
EXIT_ON_ERROR(res, "cmtGotoConfig");
unsigned short sampleFreq;
res = cmtGetSampleFrequency(instance, &sampleFreq, deviceIds[0]);
// set the device output mode for the device(s)
printf("Configuring your mode selection");
for (int i=0; i < mtCount; i++) {
if (cmtIdIsMtig(deviceIds[i])) {
res = cmtSetDeviceMode(instance, mode,settings, sampleFreq, deviceIds[i]);
} else {
res = cmtSetDeviceMode(instance, mode & 0xFF0F, settings, sampleFreq, deviceIds[i]);
}
EXIT_ON_ERROR(res, "setDeviceMode");
}
// start receiving data
res = cmtGotoMeasurement(instance);
EXIT_ON_ERROR(res, "cmtGotoMeasurement");
}
//////////////////////////////////////////////////////////////////////////
// writeHeaders
//
// Write appropriate headers to screen
void writeHeaders()
{
for (unsigned int i = 0; i < mtCount; i++) {
gotoxy(0, 2 + i * screenSensorOffset);
printf("MotionTracker %d\n", i + 1);
if ((mode & CMT_OUTPUTMODE_TEMP) != 0) {
temperatureOffset = 3;
gotoxy(0,3 + i * screenSensorOffset);
printf("Temperature");
gotoxy(7,4 + i * screenSensorOffset);
printf("degrees celcius");
gotoxy(0,6 + i * screenSensorOffset);
}
if ((mode & CMT_OUTPUTMODE_CALIB) != 0) {
gotoxy(0,3 + temperatureOffset + i * screenSensorOffset);
printf("Calibrated sensor data");
gotoxy(0,4 + temperatureOffset + i * screenSensorOffset);
printf(" Acc X\t Acc Y\t Acc Z");
gotoxy(23, 5 + temperatureOffset + i * screenSensorOffset);
printf("(m/s^2)");
gotoxy(0,6 + temperatureOffset + i * screenSensorOffset);
printf(" Gyr X\t Gyr Y\t Gyr Z");
gotoxy(23, 7 + temperatureOffset + i * screenSensorOffset);
printf("(rad/s)");
gotoxy(0,8 + temperatureOffset + i * screenSensorOffset);
printf(" Mag X\t Mag Y\t Mag Z");
gotoxy(23, 9 + temperatureOffset + i * screenSensorOffset);
printf("(a.u.)");
gotoxy(0,11 + temperatureOffset + i * screenSensorOffset);
}
if ((mode & CMT_OUTPUTMODE_ORIENT) != 0) {
printf("Orientation data\n");
switch(settings & CMT_OUTPUTSETTINGS_ORIENTMODE_MASK) {
case CMT_OUTPUTSETTINGS_ORIENTMODE_QUATERNION:
printf(" q0\t q1\t q2\t q3\n");
break;
case CMT_OUTPUTSETTINGS_ORIENTMODE_EULER:
printf(" Roll\t Pitch\t Yaw\n");
printf(" degrees\n");
break;
case CMT_OUTPUTSETTINGS_ORIENTMODE_MATRIX:
printf(" Matrix\n");
break;
default:
;
}
}
if ((mode & CMT_OUTPUTMODE_POSITION) != 0) {
printf("\nLongitude\tLatitude\t Altitude\n");
}
}
}
//////////////////////////////////////////////////////////////////////////
// calcScreenOffset
//
// Calculates offset for screen data with multiple sensors.
void calcScreenOffset()
{
// 1 line for "Sensor ..."
screenSensorOffset += 1;
if ((mode & CMT_OUTPUTMODE_TEMP) != 0)
screenSensorOffset += 3;
if ((mode & CMT_OUTPUTMODE_CALIB) != 0)
screenSensorOffset += 8;
if ((mode & CMT_OUTPUTMODE_ORIENT) != 0) {
switch(settings & CMT_OUTPUTSETTINGS_ORIENTMODE_MASK) {
case CMT_OUTPUTSETTINGS_ORIENTMODE_QUATERNION:
screenSensorOffset += 4;
break;
case CMT_OUTPUTSETTINGS_ORIENTMODE_EULER:
screenSensorOffset += 4;
break;
case CMT_OUTPUTSETTINGS_ORIENTMODE_MATRIX:
screenSensorOffset += 6;
break;
default:
;
}
if ((mode & CMT_OUTPUTMODE_POSITION) != 0)
screenSensorOffset += 4;
}
}
//////////////////////////////////////////////////////////////////////////
// clrscr
//
// Clear console screen
void clrscr()
{
#ifdef WIN32
CONSOLE_SCREEN_BUFFER_INFO csbi;
HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
COORD coord = {0, 0};
DWORD count;
GetConsoleScreenBufferInfo(hStdOut, &csbi);
FillConsoleOutputCharacter(hStdOut, ' ', csbi.dwSize.X * csbi.dwSize.Y, coord, &count);
SetConsoleCursorPosition(hStdOut, coord);
#else
int i;
for (i = 0; i < 100; i++)
// Insert new lines to create a blank screen
putchar('\n');
gotoxy(0,0);
#endif
}
//////////////////////////////////////////////////////////////////////////
// gotoxy
//
// Sets the cursor position at the specified console position
//
// Input
// x : New horizontal cursor position
// y : New vertical cursor position
void gotoxy(int x, int y)
{
#ifdef WIN32
COORD coord;
coord.X = x;
coord.Y = y;
SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);
#else
char essq[100]; // String variable to hold the escape sequence
char xstr[100]; // Strings to hold the x and y coordinates
char ystr[100]; // Escape sequences must be built with characters
/*
** Convert the screen coordinates to strings
*/
sprintf(xstr, "%d", x);
sprintf(ystr, "%d", y);
/*
** Build the escape sequence (vertical move)
*/
essq[0] = '\0';
strcat(essq, "\033[");
strcat(essq, ystr);
/*
** Described in man terminfo as vpa=\E[%p1%dd
** Vertical position absolute
*/
strcat(essq, "d");
/*
** Horizontal move
** Horizontal position absolute
*/
strcat(essq, "\033[");
strcat(essq, xstr);
// Described in man terminfo as hpa=\E[%p1%dG
strcat(essq, "G");
/*
** Execute the escape sequence
** This will move the cursor to x, y
*/
printf("%s", essq);
#endif
}
//////////////////////////////////////////////////////////////////////////
// exitFunc
//
// Closes cmt nicely
void exitFunc(void)
{
// if we have a valid instance, we should get rid of it at the end of the program
if (instance != -1) {
// Close any open COM ports
cmtClose(instance);
cmtDestroyInstance(instance);
}
// get rid of keystrokes before we post our message
while (_kbhit()) _getch();
// wait for a keypress
if (!userQuit)
{
//printf("Press a key to exit\n");
//_getch();
}
}
main.h
void doHardwareScan();
void doMtSettings(void);
void getUserInputs(void);
void clrscr(void);
void writeHeaders(void);
void gotoxy(int x, int y);
void calcScreenOffset(void);
void exitFunc(void);
TL;DR
I am trying to capture keyboard events (more specifically, the Ctrl+c command) in my own C++ program. I am attempting this through generic keyboard presses in SDL2.
END TL;DR
I have found links on SO and the internet that cover the subject of handling keyboard events with SDL2. I have a few of them listed here.
https://stackoverflow.com/questions/28105533/sdl2-joystick-dont-capture-pressed-event
https://lazyfoo.net/tutorials/SDL/04_key_presses/index.php
http://www.cplusplus.com/forum/windows/182214/
http://gigi.nullneuron.net/gigilabs/handling-keyboard-and-mouse-events-in-sdl2/
The major issue I think is causing the problem is that I am also using an Xbox-style joystick at the same time. I have had no issues whatsoever with capturing joystick events. I have been doing that for a long time now. I am having issues trying to get anything with the keyboard to throw an event. I have tried if(event.type == SDL_KEYDOWN) and then checking which key it was, but that appears to return nothing. I feel like there is some macro that I need to define to allow this since I keep finding the same solutions on the internet.
I have included the entire script that I am running at the moment.
#include <boost/thread.hpp>
// Time library
#include <chrono>
// vector data structure
#include <vector>
// Thread-safe base variables
#include <atomic>
// std::cout
#include <iostream>
// Joystick library
#include <SDL2/SDL.h>
// Counters for printing
std::atomic_int printcounter{ 0 };
// This is every 3 * 1000 milliseconds
const int printer = 300;
// If an event is found, allow for printing.
std::atomic_bool eventupdate{ false };
// This function converts the raw joystick axis from the SDL library to proper double precision floating-point values.
double intToDouble(int input)
{
return (double) input / 32767.0 ;
}
// Prevent joystick values from going outside the physical limit
double clamp(double input)
{
return (input < -1.0) ? -1.0 : ( (input > 1.0) ? 1.0 : input);
}
// SDL library joystick deadband
const int JOYSTICK_DEAD_ZONE = 5000;
// These are the raw read in values from the joystick in XInput (XBox) mode.
//Normalized direction
int leftX = 0;
int leftY = 0;
int rightX = 0;
int rightY = 0;
int leftTrigger = -32768;
int rightTrigger = -32768;
// Button array
uint buttons[11] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
// Tbe pov hat is only 4 bits - 1, 2, 4, 8
int povhat = 0;
// These are the rectified joystick values
double leftstickx = 0;
double leftsticky = 0;
double rightstickx = 0;
double rightsticky = 0;
double lefttrigger = 0;
double righttrigger = 0;
// These are the rectified boolean buttons
bool leftstickbut = false;
bool rightstickbut = false;
bool xbutton = false;
bool ybutton = false;
bool abutton = false;
bool bbutton = false;
bool rightbut = false;
bool leftbut = false;
bool startbut = false;
bool backbut = false;
bool centbut = false;
// This is the boolean that controls running the robot.
std::atomic_bool quitrobot{false};
// Joystick values
static double joyvalues[6] = { 0, 0, 0, 0, 0, 0};
static bool joybuttons[11] = { false };
// Sleep function
void wait(int milliseconds)
{
boost::this_thread::sleep_for(boost::chrono::milliseconds{milliseconds});
}
// Now the main code
int main(int argc, char** argv)
{
// Now the robot goes through the looping code until a quit flag is set to true
while ( ! quitrobot)
{
// Now we look for an Xbox-style joystick
std::cout << "Looking for gamepad..." << std::endl;
while(true)
{
// Now the program waits until an Xbox-style joystick is plugged in.
// resetting SDL makes things more stable
SDL_Quit();
// restart SDL with the expectation that a jostick is required.
SDL_Init(SDL_INIT_JOYSTICK);
// SDL_HINT_GRAB_KEYBOARD
// check for a joystick
int res = SDL_NumJoysticks();
if (res > 0) { break; } // Here a joystick has been detected.
if (res < 0)
{
std::cout << "Joystick detection error: " << std::to_string(res) << std::endl;
}
// we don't want the program running super fast when detecting hardware.
wait(20);
}
// Now we check to make sure that the joystick is valid.
// Open the joystick for reading and store its handle in the joy variable
SDL_Joystick *joy = SDL_JoystickOpen(0);
if (joy == NULL) {
/* back to top of while loop */
continue;
}
// Get information about the joystick
const char *name = SDL_JoystickName(joy);
const int num_axes = SDL_JoystickNumAxes(joy);
const int num_buttons = SDL_JoystickNumButtons(joy);
const int num_hats = SDL_JoystickNumHats(joy);
printf("Now reading from joystick '%s' with:\n"
"%d axes\n"
"%d buttons\n"
"%d hats\n\n",
name,
num_axes,
num_buttons,
num_hats);
/* I'm using a logitech F350 wireless in X mode.
If num axis is 4, then gamepad is in D mode, so neutral drive and wait for X mode.
[SAFETY] This means 'D' becomes our robot-disable button.
This can be removed if that's not the goal. */
if (num_axes < 5) {
/* back to top of while loop */
continue;
}
// This is the read joystick and drive robot loop.
while(true)
{
// poll for disconnects or bad things
SDL_Event e;
if (SDL_PollEvent(&e)) {
// SDL generated quit command
if (e.type == SDL_QUIT) { break; }
// Checking for Ctrl+c on the keyboard
// SDL_Keymod modstates = SDL_GetModState();
// if (modstates & KMOD_CTRL)
// {
// One of the Ctrl keys are being held down
// std::cout << "Pressed Ctrl key." << std::endl;
// }
if(e.key.keysym.scancode == SDLK_RCTRL || e.key.keysym.scancode == SDLK_LCTRL || SDL_SCANCODE_RCTRL == e.key.keysym.scancode || e.key.keysym.scancode == SDL_SCANCODE_LCTRL)
{
std::cout << "Pressed QQQQ." << std::endl;
}
if (e.type == SDL_KEYDOWN)
{
switch(e.key.keysym.sym){
case SDLK_UP:
std::cout << "Pressed up." << std::endl;
break;
case SDLK_RCTRL:
std::cout << "Pressed up." << std::endl;
break;
case SDLK_LCTRL:
std::cout << "Pressed up." << std::endl;
break;
}
// Select surfaces based on key press
switch( e.key.keysym.sym )
{
case SDLK_UP:
std::cout << "Pressed Up." << std::endl;
break;
case SDLK_DOWN:
std::cout << "Pressed Up." << std::endl;
break;
case SDLK_LEFT:
std::cout << "Pressed Up." << std::endl;
break;
case SDLK_RIGHT:
std::cout << "Pressed Up." << std::endl;
break;
}
std::cout << "Pressed blah di blah blah please print me." << std::endl;
}
// Checking which joystick event occured
if (e.jdevice.type == SDL_JOYDEVICEREMOVED) { break; }
// Since joystick is not erroring out, we can
else if( e.type == SDL_JOYAXISMOTION )
{
//Motion on controller 0
if( e.jaxis.which == 0 )
{
// event happened
eventupdate = true;
// Left X axis
if( e.jaxis.axis == 0 )
{
// dead zone check
if( e.jaxis.value > -JOYSTICK_DEAD_ZONE && e.jaxis.value < JOYSTICK_DEAD_ZONE)
{
leftX = 0;
}
else
{
leftX = e.jaxis.value;
}
}
// Right Y axis
else if( e.jaxis.axis == 1 )
{
// dead zone check
if( e.jaxis.value > -JOYSTICK_DEAD_ZONE && e.jaxis.value < JOYSTICK_DEAD_ZONE)
{
leftY = 0;
}
else
{
leftY = e.jaxis.value;
}
}
// Left trigger
else if ( e.jaxis.axis == 2 )
{
// dead zone check
if( e.jaxis.value > -JOYSTICK_DEAD_ZONE && e.jaxis.value < JOYSTICK_DEAD_ZONE)
{
leftTrigger = 0;
}
else
{
leftTrigger = e.jaxis.value;
}
}
// Right X axis
else if( e.jaxis.axis == 3 )
{
// dead zone check
if( e.jaxis.value > -JOYSTICK_DEAD_ZONE && e.jaxis.value < JOYSTICK_DEAD_ZONE)
{
rightX = 0;
}
else
{
rightX = e.jaxis.value;
}
}
// Right Y axis
else if( e.jaxis.axis == 4 )
{
// dead zone check
if( e.jaxis.value > -JOYSTICK_DEAD_ZONE && e.jaxis.value < JOYSTICK_DEAD_ZONE)
{
rightY = 0;
}
else
{
rightY = e.jaxis.value;
}
}
// Right trigger
else if( e.jaxis.axis == 5 )
{
// dead zone check
if( e.jaxis.value > -JOYSTICK_DEAD_ZONE && e.jaxis.value < JOYSTICK_DEAD_ZONE)
{
rightTrigger = 0;
}
else
{
rightTrigger = e.jaxis.value;
}
}
}
}
else if ( e.type == SDL_JOYBUTTONUP || e.type == SDL_JOYBUTTONDOWN )
{
// now we are looking for button events.
if (e.jbutton.which == 0)
{
// event happened
eventupdate = true;
// buttons[e.jbutton.button] = e.jbutton.state;
if (e.jbutton.button == 0)
{
buttons[0] = e.jbutton.state;
}
if (e.jbutton.button == 1)
{
buttons[1] = e.jbutton.state;
}
if (e.jbutton.button == 2)
{
buttons[2] = e.jbutton.state;
}
if (e.jbutton.button == 3)
{
buttons[3] = e.jbutton.state;
}
if (e.jbutton.button == 4)
{
buttons[4] = e.jbutton.state;
}
if (e.jbutton.button == 5)
{
buttons[5] = e.jbutton.state;
}
if (e.jbutton.button == 6)
{
buttons[6] = e.jbutton.state;
}
if (e.jbutton.button == 7)
{
buttons[7] = e.jbutton.state;
}
if (e.jbutton.button == 8)
{
buttons[8] = e.jbutton.state;
}
if (e.jbutton.button == 9)
{
buttons[9] = e.jbutton.state;
}
if (e.jbutton.button == 10)
{
buttons[10] = e.jbutton.state;
}
if (e.jbutton.button == 11)
{
buttons[11] = e.jbutton.state;
}
}
}
else if ( e.type == SDL_JOYHATMOTION)
{
if (e.jhat.which == 0)
{
// event happened
eventupdate = true;
povhat = e.jhat.value;
}
}
}
// Now that we have read in the values directly from the joystick we need top convert the values properly.
leftstickx = clamp(intToDouble(leftX));
leftsticky = clamp(intToDouble(leftY));
rightstickx = clamp(intToDouble(rightX));
rightsticky = clamp(intToDouble(rightY));
lefttrigger = clamp(intToDouble(leftTrigger));
righttrigger = clamp(intToDouble(rightTrigger));
// rectify the buttons to become boolean values instead of integers.
abutton = buttons[0] > 0;
bbutton = buttons[1] > 0;
xbutton = buttons[2] > 0;
ybutton = buttons[3] > 0;
//
rightbut = buttons[4] > 0;
leftbut = buttons[5] > 0;
//
centbut = buttons[8] > 0;
startbut = buttons[7] > 0;
backbut = buttons[6] > 0;
//
leftstickbut = buttons[9] > 0;
rightstickbut = buttons[10] > 0;
// Transfer axis to the array.
joyvalues[0] = leftstickx;
joyvalues[1] = leftsticky;
joyvalues[2] = rightstickx;
joyvalues[3] = rightsticky;
joyvalues[4] = lefttrigger;
joyvalues[5] = righttrigger;
// We are using the "B" button to quit the program
if (bbutton)
{
quitrobot = true;
std::cout << "Shutting down program." << std::endl;
break;
}
if (eventupdate)
{
// This section of code is meant for running code that happens when SDL has detected an event.
// This code section can be used for something else as well.
if (e.key.keysym.sym == SDL_SCANCODE_RCTRL || e.key.keysym.sym == SDL_SCANCODE_LCTRL || e.key.keysym.sym == SDLK_LCTRL || e.key.keysym.sym == SDLK_RCTRL)
{
std::cout << "SDL Event: Ctrl pressed.\n" << std::endl;
}
// Simply print the event
eventupdate = false;
} else {}
if ( ! (printcounter = ((printcounter + 1) % printer)))
{
// const Uint8 *state = SDL_GetKeyboardState(NULL);
// if (state[SDL_SCANCODE_RETURN]) {
// printf("<RETURN> is pressed.\n");
// }
}
// Sleep the program for a short bit
wait(5);
}
// Reset SDL since the robot is no longer being actuated.
SDL_JoystickClose(joy);
// We get here only if the joystick has been disconnected.
std::cout << "Gamepad disconnected.\n" << std::endl;
}
// The program then completes.
return 0;
}
The most important part of that huge block of code is lines 129 to 179. I was doing more fooling around trying to get key capture to work but I could not get a response. Everywhere else is logic for the joystick reading (which has worked for me flawlessly). I have been referring to this link for all of the macros available to the programmer. I have not been able to capture the left control button or the right control button. I have also been trying the arrow keys for kicks as well and those are not working either. I know there are remnants of other code snippets thrown in there as I was testing. Given all of my testing, I am just not sure how to capture any keyboard keys, let alone Ctrl+c. None of my desired print statements print.
I am able to run the code on Ubuntu 1804 LTS with the stock GUI manager and window manager. I have a feeling the problem might also have something to do with the operating system not letting SDL2 capture the keyboard, but I don't know what to do to allow only the keyboard or certain keys to be consumed by SDL2.
I am trying to not use platform-specific code since I already have successfully used platform-specific signal interrupts. My goal is to simply make a certain combination of depressed keys result in a program terminating. I figured that, since SDL2 can access all keys on a keyboard, that I should be able to simply
Unless you want to read keyboard input from stdin you need to open a window and focus it to get key events in SDL. Here's an example (note the call to SDL_Init uses SDL_INIT_VIDEO and there's some code in there for rendering a background and handling resize events).
#include <iostream>
#include <SDL2/SDL.h>
int main(int argc, char** argv)
{
if (SDL_Init(SDL_INIT_VIDEO) < 0) { // also initialises the events subsystem
std::cout << "Failed to init SDL.\n";
return -1;
}
SDL_Window *window = SDL_CreateWindow(
"Window", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
680, 480, SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE);
if(!window) {
std::cout << "Failed to create window.\n";
return -1;
}
// Create renderer and select the color for drawing.
SDL_Renderer* renderer = SDL_CreateRenderer(window, -1, 0);
SDL_SetRenderDrawColor(renderer, 200, 200, 200, 255);
while(true)
{
// Clear the entire screen and present.
SDL_RenderClear(renderer);
SDL_RenderPresent(renderer);
SDL_Event event;
while (SDL_PollEvent(&event))
{
if (event.type == SDL_QUIT) {
SDL_Quit();
return 0;
}
if(event.type == SDL_WINDOWEVENT) {
if (event.window.event == SDL_WINDOWEVENT_SIZE_CHANGED) {
int width = event.window.data1;
int height = event.window.data2;
std::cout << "resize event: " << width << "," << height << std::endl;
}
}
if (event.type == SDL_KEYDOWN) {
int key = event.key.keysym.sym;
if (key == SDLK_ESCAPE) {
SDL_Quit();
return 0;
}
std::cout << "key event: " << key << std::endl;
}
}
}
return 0;
}
Key events are sent to the currently focused window and SDL uses the underlying OS to handle this. E.g. In Linux this means SDL calls X11 functions.
edit:
As detailed in this question it appears you can also get a snapshot of the state of the keys. In either case I think a window needs to be opened to receive events even though I've edited this multiple times to come to that conclusion (apologies if that caused any confusion). Your OS may provide functions for polling the state of the keyboard without using events or windows, such as GetAsyncKeyState in Windows.
what I expect: it will store the last ten commands entered in the terminal. And you can see them when you press ctrl+c. If you want to exit, just press ctrl+d.
So I implemented with queue to store commands. But after 'length = read(STDIN_FILENO, inputBuffer, MAX_LINE);', all the elements in queue are the newest command.(e.g. COMMAND->date queue:date; COMMAND->cal queue:cal cal)
It was normal before the 'read'. But it doesn't help when I replaced it with 'fgets(inputBuffer,MAX_LINE,stdin);'.And in this way, I don't know how to catch 'ctrl+d' because there is no signal corresponding to it(like SIGINT and ctrl+c) so I had to check if the length equals to 0.
how to solve this problem?
#include <signal.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <unistd.h>
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <iostream>
#include <sys/wait.h>
#include <queue>
using namespace std;
#define BUFFER_SIZE 50
#define MAX_LINE 80 /* 80 chars per line, per command, should be enough. */
struct mes{
char* _args[MAX_LINE/2+1];
int len;
int bg;
int erno;
mes(){
len = 0;
bg = false;
memset(_args,0,sizeof(_args));
}
mes(char* new_args[],int _len,int _bg){
len = _len;
bg = _bg;
for(int i = 0; i < len; ++i){
_args[i] = new_args[i];
}
_args[len] = NULL;
}
void show(){
if(erno==-1) cout<<"ERROR:";
for(int i=0;i<len;i++)
cout<<_args[i]<<" ";
if(bg) cout<<"&"<<endl;
else cout<<endl;
}
~mes(){
memset(_args,0,sizeof(_args));
// for(int i=0; i<len && args[i]; i++){
// delete args[i];
// args[i]=NULL;
// }
// delete[] args;
// args=NULL;
}
};
queue <mes*> rec, quetmp;
static int reclen = 0;
static int totlen = 0;
void readSplit(char inputBuffer[], char *args[], int * background){
int length, /* # of characters in the command line */
i, /* loop index for accessing inputBuffer array */
start, /* index where beginning of next command parameter is */
ct; /* index of where to place the next parameter into args[] */
ct = 0;
if(!rec.empty()){
cout<<"before read"<<endl;
cout<<rec.front()->_args[0]<<endl;
cout<<"size:"<<sizeof(rec.front()->_args[0])<<'\n';
for(int k = 0; k < sizeof(rec.front()->_args[0]); ++k)
cout<<'*'<<rec.front()->_args[0][k]<<endl;
cout<<"end"<<endl;
}
/* read what the user enters on the command line */
// char *tmp = fgets(inputBuffer,MAX_LINE,stdin);
length = read(STDIN_FILENO, inputBuffer, MAX_LINE);
if(!rec.empty()){
cout<<"after read"<<endl;
cout<<rec.front()->_args[0]<<'\n';
cout<<"size:"<<sizeof(rec.front()->_args[0])<<'\n';
for(int k = 0; k < sizeof(rec.front()->_args[0]); ++k)
cout<<'*'<<rec.front()->_args[0][k]<<endl;
cout<<"end"<<endl;
}
start = -1;
if (length == 0){
write(STDOUT_FILENO,inputBuffer,strlen(inputBuffer));//write the last instruction
exit(0); /* ^d was entered, end of user command stream */
}
if (length < 0){
perror("error reading the command");
exit(-1); /* terminate with error code of -1 */
}
/* examine every character in the inputBuffer */
for (i=0;i<length;i++) {
switch (inputBuffer[i]){
case ' ':
case '\t' : /* argument separators */
if(start != -1){
args[ct] = &inputBuffer[start]; /* set up pointer */
ct++;
}
inputBuffer[i] = '\0'; /* add a null char; make a C string */
start = -1;
break;
case '\n': /* should be the final char examined */
if (start != -1){
args[ct] = &inputBuffer[start];
ct++;
}
inputBuffer[i] = '\0';
args[ct] = NULL; /* no more arguments to this command */
break;
default : /* some other character */
if (start == -1)
start = i;
if (inputBuffer[i] == '&'){
*background = 1;
inputBuffer[i] = '\0';
}
}
}
args[ct] = NULL; /* just in case the input line was > 80 */
// mes* pmes = new mes(args, ct, *background);
}
/**
* setup() reads in the next command line, separating it into distinct tokens
* using whitespace as delimiters. setup() sets the args parameter as a
* null-terminated string.
*/
//args end with NULL
//only deal with splitted command
void setup(char inputBuffer[], char *args[],int *background)
{
readSplit(inputBuffer, args, background);
int len = 0;
while(args[len]) ++len;
mes* pmes = new mes(args, len, *background);
int * p_errno=(int*)mmap(NULL,sizeof(int)*2,PROT_READ|PROT_WRITE,\
MAP_SHARED|MAP_ANONYMOUS,-1,0);
int * p_errno;
int pid = fork();
if(pid == 0){
int erno = execvp(args[0], args);
*p_errno = erno;
_exit(0);
}
else{
if(!(*background)){
waitpid(pid, NULL, 0);
}
// }
pmes->erno = 1;
pmes->erno = *p_errno;
if(reclen < 10){
rec.push(pmes);
++reclen;
}
else{
rec.pop();
rec.push(pmes);
}
++totlen;
}
void handle_SIGINT(int sig){// ctrl+c
int num = totlen - reclen, index = 0;
mes* ls[10];
cout<<endl;
while(!rec.empty()){
cout<<++num<<": ";
rec.front()->show();
quetmp.push(rec.front());
ls[index++] = rec.front();
rec.pop();
}
while(!quetmp.empty()){
rec.push(quetmp.front());
quetmp.pop();
}
cout<<"Exit record input \"q\", repeat command,\
input \"r\" or \"r x\"(x is the prefix of command)"<<endl;
char buffer[MAX_LINE];
char *arguments[MAX_LINE/2+1];
int flag;
int exeNum = index - 1;
while(true){
readSplit(buffer, arguments, &flag);
int num_arg = 0;
while(arguments[num_arg]) ++num_arg;
if(num_arg == 0) continue;
if(strcmp(arguments[0], "p") == 0) break;
if(strcmp(arguments[0], "r") != 0){
cout<<"No such command"<<endl;
continue;
}
if(num_arg == 1){
}
else if(num_arg != 2 || strlen(arguments[1]) != 1){
cout<<"invalid input"<<endl;
continue;
}
else{
for(; exeNum >= 0; --exeNum){
if(ls[exeNum]->args[0][0] == arguments[1][0]){
break;
}
}
}
if(exeNum >= 0){
ls[exeNum]->show();
if(ls[exeNum]->erno == -1){
cout<<"It is an error command"<<endl;
}
else{
setup(buffer, ls[exeNum]->args, & (ls[exeNum]->bg));
}
}
}
cout<<"record has quitted"<<endl;
}
int main(void)
{
char inputBuffer[MAX_LINE]; /* buffer to hold the command entered */
int background; /* equals 1 if a command is followed by '&' */
char *args[MAX_LINE/2+1];/* command line (of 80) has max of 40 arguments */
// signal(SIGINT,handle_SIGINT);
while (1){ /* Program terminates normally inside setup */
background = 0;
printf("COMMAND->");
fflush(stdout);
// readSplit(inputBuffer, args, &background);
setup(inputBuffer,args,&background); /* get next command */
}
}
So I have a 2d map array printed out. I have 0's set as a space and 1 set as a wall. I have variables such as traps and health as well as the player. However, I am having trouble implementing a score as the two collide. I was wondering how I can detect when a player and life collide which would increment the health variable by 1. Right now it increments every time I move.
Thank you!
These are my variable functions
void putplayer()
{
setcolor(9);
gotoxy( player.x +mazex, player.y +mazey);
cout<<playersymbol;
setcolor(7);
}
void puttreasure()
{
setcolor(14);
gotoxy(treasure.x +mazex, treasure.y +mazey);
cout<<treasuresymbol;
setcolor(7);
}
void puttraps()
{
setcolor(14);
gotoxy( traps.x +mazex, traps.y +mazey);
cout<<trapssymbol;
setcolor(7);
}
void putlives()
{
setcolor(14);
gotoxy( lives.x +mazex, lives.y +mazey);
cout<<livessymbol;
setcolor(7);
}
void moveleft()
{
gotoxy(31,7);
cout<<"left key move player left \n\n";
if (maze[player.y][player.x-1]==0) player.x = player.x -1;
}
Then my Main, however some code I took out as it might not be relevant
int main()
{
DWORD mode; /* Preserved console mode */
INPUT_RECORD event; /* Input event */
BOOL EXITGAME = FALSE; /* Program termination flag */
// unsigned int counter = 0; /* The number of times 'Esc' is pressed */
/* Get the console input handle */
HANDLE hstdin = GetStdHandle( STD_INPUT_HANDLE );
/* Preserve the original console mode */
GetConsoleMode( hstdin, &mode );
/* Set to no line-buffering, no echo, no special-key-processing */
SetConsoleMode( hstdin, 0 );
srand ( time(NULL) ); //initialize the random seed
// Variables
int health = 0;
// Declare variable positions
player.x=1;
player.y=1;
treasure.x = 1;
treasure.y = 3;
traps.x = 1;
traps.y = 7;
lives.x = 1;
lives.y = 9;
clrscr();
setcolor(15);
while (!EXITGAME)
{
if (WaitForSingleObject( hstdin, 0 ) == WAIT_OBJECT_0) /* if kbhit */
{
DWORD count; /* ignored */
/* Get the input event */
ReadConsoleInput( hstdin, &event, 1, &count );
/* Only respond to key release events */
if ((event.EventType == KEY_EVENT)
&& !event.Event.KeyEvent.bKeyDown)
clrscr();
putmenu();
gotoxy(6,20);
cout<<"Lives: " << health;
Sleep(100);
switch (event.Event.KeyEvent.wVirtualKeyCode)
{
case VK_ESCAPE:
EXITGAME = TRUE;
break;
case VK_LEFT:
// left key move player left
moveleft();
break;
case VK_RIGHT:
// right key move player right
moveright();
break;
case VK_UP:
// up key move player up
moveup();
break;
case VK_DOWN:
// down key move player down
movedown();
break;
case VK_A:
// left key move player left
moveleft();
break;
case VK_D:
// right key move player right
moveright();
break;
case VK_W:
// up key move player up
moveup();
break;
case VK_S:
// down key move player down
movedown();
break;
}//switch
putplayer();
puttreasure();
puttraps();
putlives();
}
if(maze[player.x][player.y] = maze[lives.x][lives.y]){
health++;
}
else if(maze[player.x][player.y] = maze[traps.x][traps.y]){
health--;
}
}
gotoxy(1,23);cout<<" ";
SetConsoleMode( hstdin, mode );
return 0;
}
You have the code
if(maze[player.x][player.y] = maze[lives.x][lives.y])
which sets the maze[player.x][player.y] to the value at maze[lives.x][lives.y], and then evaluates it (it will evaluate to true if 1 (wall), false if 0 (space)). I think you meant to have something like
if((player.x == lives.x) && (player.y == lives.y))
which will (as far as I can tell) evaluate if the player and the lives are at the same location.
I'm new to ncurses and we have a project to create a game of our choice.
The idea of my game is to have a spaceship and have enemies attack from the top.
I only started the code and I already ran into a problem, when i use the space bar to shoot a bullet, the bullet will travel, however i am unable to move my ship at the same time the bullet is moving.
#include<ncurses.h>
typedef struct
{/*define a structure for player information*/
int row;
int col;
}playerinfo;
int changeRow(int x,int m, int c)
{
if(x+m==22 || x+m==0 )
{
beep();
return x;
}
return x+m;
}
int changeColumn(int y,int n, int r)
{
if(y+n==72 || y+n==0 )
{
beep();
return y;
}
return y+n;
}
int main(){
initscr();
start_color();
assume_default_colors(COLOR_GREEN, COLOR_BLACK);
noecho();
cbreak();
curs_set(0); /* turn cursor display off */
timeout(0);
keypad(stdscr,TRUE); /* allow keypad keys to be used */
playerinfo playership;
playership.row= 10;
playership.col= 15;
char player[] =" X ";
char player2[]=" |o| ";
char player3[]=" xX| |Xx ";
char player4[]=" X | | X ";
char player5[]=" X__-|-__X ";
char bullet = '.';
int key = 0;
int i=0;
bool moving= false;
mvprintw(playership.row,playership.col,player);
mvprintw(playership.row+1,playership.col,player2);
mvprintw(playership.row+2,playership.col,player3);
mvprintw(playership.row+3,playership.col,player4);
mvprintw(playership.row+4,playership.col,player5);
timeout(0);
while(key!='q'){
usleep(17000);
mvprintw(playership.row,playership.col," ");
mvprintw(playership.row+5,playership.col," ");
key = getch ();
switch(key){
case KEY_UP: playership.row=changeRow(playership.row,-1,playership.col); /* move up */
break;
case KEY_DOWN: playership.row=changeRow(playership.row,+1,playership.col); /* move down */
break;
case KEY_LEFT:playership.col=changeColumn(playership.col,-1,playership.row); /* move left */
break;
case KEY_RIGHT:playership.col=changeColumn(playership.col,+1,playership.row); /* move right */
break;
case ' ': moving=true; break;
default: break; /* do nothing if other keys */
}
mvprintw(playership.row,playership.col,player);
mvprintw(playership.row+1,playership.col,player2);
mvprintw(playership.row+2,playership.col,player3);
mvprintw(playership.row+3,playership.col,player4);
mvprintw(playership.row+4,playership.col,player5);
if (moving==true){
for( i=0; i <24; i++){
refresh; mvprintw(playership.row-i-2,playership.col+5,"%c", bullet); mvprintw(playership.row,playership.col,player);
refresh();usleep(12000); mvprintw(playership.row-i-1,playership.col+5," ");} moving=false; }
refresh();
}
echo(); /* turn echo back on */
endwin(); /* End curses mode */
return 0;
}
That is because you nested the "firing" code inside your game loop, so all input stops while you do that animation. You need to change your logic to a kind of state machine:
switch(key)
{
// ...
case ' ':
if( !bullet_active )
{
bullet_active = true;
bullet_pos = 0;
}
break;
}
if( bullet_active ) {
// TODO: Draw bullet at bullet_pos
if( ++bullet_pos == 24 ) bullet_active = false;
}