I'm creating a game in AS3 and currently working on the menu. Don't hate I'm very new to this.
I want this to happen when the case: singlePlayerX. This part starts a new single player game when you press 1 on the keyboard. The problem here is I'm not sure where to insert this part or if that's even possible.
if (Input.keyboard.justPressed(this.evertron_keys.PLAYER_BUTTON_1)) {
Session.application.displayState = new Game();
This is the switch I'm currently working with:
if (Input.keyboard.justPressed(this.evertron_keys.PLAYER_DOWN)) {
for (var i:int = 0; i < this.add_layer.numChildren; i++) {
switch (this.add_layer.getChildAt(i)) {
case this.singlePlayerX:
this.add_layer.removeChild(this.singlePlayerX);
this.add_layer.addChild(this.singlePlayer);
this.add_layer.addChild(this.multiPlayerX);
this.add_layer.removeChild(this.multiPlayer);
break;
case this.multiPlayerX:
this.add_layer.removeChild(this.multiPlayerX);
this.add_layer.addChild(this.multiPlayer);
this.add_layer.addChild(this.highScoreX);
this.add_layer.removeChild(this.highScore);
break;
case this.highScoreX:
this.add_layer.removeChild(this.highScoreX);
this.add_layer.addChild(this.highScore);
this.add_layer.addChild(this.singlePlayerX);
this.add_layer.removeChild(this.singlePlayer);
break;
}
}
}
What this part does is changes what is on the screen when you press button down. So basically what I want is when you press 1 on when case this.singlePlayerX = new Game,
when case this.multiPlayerX = new Multiplayer, and so on.
I have tried putting the new Game if statement in the switch statement but nothing happens when I press 1.
Appreciate the help.
Related
this is my very first post :)
I'm a graphic design student in my second year and we have to make code for business cards.
What I want is when I click with my mouse the background of the business card will change.
It worked with a boolean for two pictures.
But now I want it to work with four images.
Have asked the teacher for help and she sent me information about Switch.
But I have no idea where to put in my code and how to fill it in.
This is my code so far
String Instagram="#Famoys_Saz";
String quote = "Guess my passion ;)";
PFont font;
PImage bg;
PImage Snake2;
PImage snake3;
PImage snake4;
boolean click = true;
void setup() {
size(850, 550);
font = createFont("Galaxyfaceano-4yM9.ttf", 45);
textFont(font);
textAlign(CENTER);
bg = loadImage("Snake.jpg");
Snake2= loadImage ("Snake2.jpg");
click = true;
}
void draw() {
background(bg);
if (click == true ) {
image(bg, 0, 0);
} else {
image(Snake2, 0, 0);
}
text(Instagram, mouseX, mouseY);
text(quote, mouseY, mouseX, 05);
}
void mousePressed() {
click =! click;
}
and this is the code my teacher send me:
if( imageNumber == 1 ) {
} else if ( imageNumber == 2 ) {
} else {
}
Could someone help me out? I'm quite a beginner when it comes to coding.
it will look something like this:
switch( imageNumber ) {
case 1: // same as saying imageNumber == 1
//some code
break;
case 2: // same as saying imageNumber == 2
//some code here
break;
}
switch(imageNumber) {
case 1:
// do stuff
break;
case 2:
// do stuff
break;
case 3:
// do stuff
break;
case 4:
// do stuff
break;
default:
// if no case was selected, do this
}
Switches are easy to read and efficient, and some programmers prefers them to else if. Both are fine, as long as they are readable, but the switch has some unique particularities, like having to use break; between cases. The break; will exit the switch, else it would evaluate every other possible case (thus you're saving some execution time).
It happened to me in a robotic project to deliberately skip the break; statement so the robot would do "everything from this point on", but it's very uncommon and a source of many beginner's bugs to forget the break;.
Depending on the language, switches can evaluate different things, but the classics are integers and strings.
Have fun!
I am trying to clean up movement code I followed from a video tutorial series that was never finished. My intent is for the character to only ever be able to move on X or Y at any given time (so no diagonal). The character has direction facing to keep in mind.
My issue is the player can still press any key they want, or accidently press two keys at the same time.
Ex. if you move Up and make a right turn, accidentally press Right before letting go of Up.
Or if you press Up, press and let go Right to make a slight movement right while continuing to press Up, the player should continue to move up after letting go of Right without having to re-press Up. etc.
Just to make sure all possible input cases are handled intuitively.
EDIT: This is the code so far and I'm getting weird errors I don't know what's wrong
#pragma once
#include "../game.h"
#include "ECS.h"
#include "Components.h"
#include <list>
using namespace std;
class KeyboardController : public Component
{
public:
TransformComponent *transform;
SpriteComponent *sprite;
std::list<SDL_Event> keyDownList;
SDL_Event lastDirection;
void updateKeyState()
{
if (Game::event.type == SDLK_ESCAPE) {
Game::isRunning = false;
}
else if (Game::event.type == SDL_KEYDOWN) {
keyDownList.push_back(Game::event.key.keysym.sym);
}
else if (Game::event.type == SDL_KEYUP) {
keyDownList.remove(Game::event.key.keysym.sym);
}
}
void init() override
{
transform = &entity->getComponent<TransformComponent>();
sprite = &entity->getComponent<SpriteComponent>();
}
void update() override
{
void updateKeyState();
void updateMovement();
}
};
Severity Code Description Project File Line Suppression State
Error (active) E0304 no instance of overloaded function "std::list<_Ty, _Alloc>::push_back [with _Ty=SDL_Event, _Alloc=std::allocator]" matches the argument list Sandbox C:\file_path\KeyboardController.h 31
Severity Code Description Project File Line Suppression State
Error (active) E0415 no suitable constructor exists to convert from "SDL_Keycode" to "SDL_Event" Sandbox C:\file_path\KeyboardController.h 34
You should basically clean up your code by separating the logic between key events and player movement. So your update() method could look like this:
void update() override
{
updateKeyState();
updateMovement();
}
Since you want the player to move only vertically or horizontally (never diagonally), you have to store the key press order in a data structure that can be easily accessed. I think you could use a doubly-linked list:
std::list<SDL_Event> keyDownList;
and we should also store the last key pressed in order to restore the idle animation of the player:
SDL_Event lastDirection;
The updateKeyState() method should add or remove the key to/from the linked list. We should also check if the player wants to leave the game by pressing ESC:
void updateKeyState() {
if (Game::event.type == SDLK_ESCAPE) {
Game::isRunning = false;
} else if (Game::event.type == SDL_KEYDOWN) {
keyDownList.push_back(Game::event.key.keysym.sym);
} else if (Game::event.type == SDL_KEYUP) {
keyDownList.remove(Game::event.key.keysym.sym);
}
}
The updatePlayerMovement() method is where the magic happens. We should basically check which key was pressed first and update the player position accordingly. We also save the down key in the lastDirection field in order to use it when no key is pressed.
void updateMovement() {
// if any key is down
if (keyDownList.size() > 0) {
const SDL_Event downKey = keyDownList.front();
switch (downKey) {
case SDLK_w:
transform->velocity.y = -1;
transform->velocity.x = 0;
sprite->Play("BackWalk");
lastDirection = downKey;
break;
case SDLK_a:
transform->velocity.x = -1;
transform->velocity.y = 0;
sprite->Play("SideWalk");
sprite->spriteFlip = SDL_FLIP_HORIZONTAL;
lastDirection = downKey;
break;
case SDLK_s:
transform->velocity.y = 1;
transform->velocity.x = 0;
sprite->Play("FrontWalk");
lastDirection = downKey;
break;
case SDLK_d:
transform->velocity.x = 1;
transform->velocity.y = 0;
sprite->Play("SideWalk");
sprite->spriteFlip = SDL_FLIP_NONE;
lastDirection = downKey;
break;
}
} else {
// no key is down, handle idle situations
transform->velocity.x= 0;
transform->velocity.y = 0;
switch (lastDirection) {
case SDLK_w:
sprite->Play("BackIdle");
break;
case SDLK_a:
sprite->Play("SideIdle");
break;
case SDLK_s:
sprite->Play("FrontIdle");
break;
case SDLK_d:
sprite->Play("SideIdle");
break;
}
}
}
Note: I haven't tested this code because I don't have the code and structures from your game. So you may have to edit a piece here and there to make it work for you.
The first image shows what I want to do. The second one shows what I get.
I want the status bar to show the state of the special keys CAPS LOCK, NUM LOCK and SCROLL LOCK. This image is from an old project using the CStatusBar.
This snapshot is from CMainFrame class.
This image shows how I am doing it in Visual C++ 2015 MFC and the results I get. This snapshot is from CMainFrame class, too.
My question is : Can anyone tell me how my application can intercept the change from toggle buttons CAPS LOCK and NUM LOCK then update the user interface.
I tried to use this code but it doesn't work :
ON_UPDATE_COMMAND_UI(ID_INDICATOR_STYLE, &CMainFrame::OnUpdateStyle)
ON_UPDATE_COMMAND_UI(ID_INDICATOR_FOLD, &CMainFrame::OnUpdateFold)
ON_UPDATE_COMMAND_UI(ID_INDICATOR_OVR, &CMainFrame::OnUpdateInsert)
Thanks in advance.
First of all the standard behavior of CStatusBar is not supported by CMFCRibbonStatusBar.
The good news is that it is very easy to implement the same behavior.
Here is what you have to do in order to implement it in your application:
Add this to message map of your main frame class or child frame in case of MDI:
ON_UPDATE_COMMAND_UI(ID_INDICATOR_CAPS, &CMainFrame::OnUpdateButtonsState)
ON_UPDATE_COMMAND_UI(ID_INDICATOR_NUM, &CMainFrame::OnUpdateButtonsState)
ON_UPDATE_COMMAND_UI(ID_INDICATOR_SCRL, &CMainFrame::OnUpdateButtonsState)
The actual update handler should look like this:
void CMainFrame::OnUpdateButtonsState(CCmdUI* pCmdUI)
{
UINT nVK;
UINT flag = 0x0001;
switch (pCmdUI->m_nID)
{
case ID_INDICATOR_CAPS:
nVK = VK_CAPITAL;
break;
case ID_INDICATOR_NUM:
nVK = VK_NUMLOCK;
break;
case ID_INDICATOR_SCRL:
nVK = VK_SCROLL;
break;
case ID_INDICATOR_KANA:
nVK = VK_KANA;
break;
default:
TRACE(traceAppMsg, 0, "Warning: OnUpdateKeyIndicator - unknown indicator 0x%04X.\n",
pCmdUI->m_nID);
pCmdUI->ContinueRouting();
return; // not for us
}
pCmdUI->SetCheck(::GetKeyState(nVK) & flag);
}
I solved it by moving the code to CChildFrame class.
ON_UPDATE_COMMAND_UI(ID_INDICATOR_CAPS, &CChildFrame::OnUpdateIndicators)
ON_UPDATE_COMMAND_UI(ID_INDICATOR_NUM, &CChildFrame::OnUpdateIndicators)
ON_UPDATE_COMMAND_UI(ID_INDICATOR_SCRL, &CChildFrame::OnUpdateIndicators)
And then
void CChildFrame::OnUpdateIndicators(CCmdUI *pCmdUI)
{
pCmdUI->Enable();
// ... the rest of the above code
CString text;
if (::GetKeyState(nVK) & flag)
text.LoadStringW(pCmdUI->m_nID);
pCmdUI->SetText(text);
}
Here i am having function like this. problem i am facing while changing Set parameter section.
first: i could not able to change Set_parameter Window
Second: Since in my loop i am saying if none key pressed display clock.because of that when i enter into Section menu it directly bounce back to Main displaying clock. Is there any way, where i can stay menu section unless Exit/LEFT key pressed
This main function where i am calling my LCD_call Function
void loop()
{
int button;
while(( button = read_LCD_buttons()) != btnNONE)
{
lcd_call();digitalClockDisplay();
}
}
LCD_call being called here.
LCD_call
break command should break/exit the loop.
It could be that the if condition is not coming out to be true, for any input case.
Try debugging your code by placing a break point inside if.
if(button==btnSELECT)
{
break; // place your breakpoint here.
}
and check if your code satifies the if condition for any possible input.
This should work :
void lcd_call()
{
while ( (button = read_LCD_buttons()) != btnSELECT)
{
DS_Counter=Display_selection();
switch (DS_Counter)
{
case 1:
lcd.setCursor(0,0);
digitalClockDisplay();
timedBeep(shortBeep,1);
break;
case 2:
lcd.setCursor(0,0);
Display_angle();
timedBeep(shortBeep,1);
break;
case 3:
lcd.setCursor(0,0);
Display_coordinate();
timedBeep(shortBeep,1);
break;
case 4:
lcd.setCursor(0,0);
Display_Wind();
timedBeep(shortBeep,1);
break;
case 5:
break;
}
}
}
You have already given a condition in While loop. As soon as the condition is false, it will break the while loop
OS:: win xp sp3.
Qt:: 4.6
I have class Gameboard in which i have some rectangle.I defined keyPressEvent for that rectangle in order to move him around the screen.Key_A :: rectangle.moveToLeft & Key_D :: rectangle.moveToRight.Problem is that keys work with delay.
When i release one key and press another one it takes some time before that one begin to work.I checked Qt online documentation and now for that effect but dont now how to make those keys to work instantly without delay beetween them?
code snippet:
//in Gameboard class
ship = new QRect(x,y,w,h);
void Gameboard::keyPressEvent(QKeyEvent* event)
{
switch(event->key()) {
case Qt::Key_A :
{
x = x-10;
ship->moveTo(x,y);
break;
}
case Qt::Key_D :
{
x = x+10;
ship->moveTo(x,y);
break;
}
}
}
Put input cursor into any applicable text box and press the 'A' key. What you'll see is once you press the key, letter 'A' will be printed, then there will be a pause, and then first letter 'A' will be quickly followed by many others. That's the way keypress events work. And your program is receiving them exactly like this. First you receive one event when the key is actually pressed, and then after a delay you get a lot of automatically repeated events, in case user wants to enter one character many-many times.
It works perfectly for text input, but in games you usually need smooth movement. If that's the case, you need to move your ship not upon receiving the event, but regularly, for example, on timer event. And you will need to catch both keyPressEvent and keyRelease event and use them to remember what movement keys are currently pressed. So you could for example do this:
struct Ship {
bool is_moving_left, is_moving_right;
QPoint position;
int speed;
...
void timerEvent()
{
if (is_moving_left) position.setX (position.x() - speed);
if (is_moving_right) position.setX (position.x() + speed);
}
...
};
...
void Gameboard::keyPressEvent (OKeyEvent *_event)
{
switch(event->key()) {
case Qt::Key_A :
ship->is_moving_left = true;
break;
case Qt::Key_D :
ship->is_moving_right = true;
break;
}
}
...
void Gameboard::keyReleaseEvent (OKeyEvent *_event)
{
switch(event->key()) {
case Qt::Key_A :
ship->is_moving_left = false;
break;
case Qt::Key_D :
ship->is_moving_right = false;
break;
}
}
Then just make sure Ship::timerEvent() gets called on every timer event in the game.