My main loop is working fine, but the problem I'm encountering is when I click the "esc" button on my keyboard, the shape that I have should move to the right every 1 second for five times then terminate. I did a loop on it, but it doesn't work. I call this function with
case 27:
glutTimerFunc(25, move, 1);
Here's the portion of that code I did:
void move(int value)
{
int i = value;
while (i <= 5)
{
pX += 0.5; //pX is the position of the object in x-axis
i++;
}
glutPostRedisplay();
exit(0);
}
Can you help me point out my mistakes? I'm still confused on how glutTimerFunc works so any tips/explanation would be nice. Thanks.
Related
I added touch input for my game's character. The camera moves when a player's finger is dragged across the screen. However, when the joysticks are used to move, the camera doesn't move at the same time.
When I do the same code with Blueprints the code works and the camera still moves. When I drag the touch while pressing the joystick to move, I think that there is a problem in the ETouchIndex::Type. This is because in the BP when I use the finger index given in the touch event, it works. However, when I only use touch 1 as the finger index, it does not work. I think if I put that index in my CPP code it will work too, but where can I find the finger index? Can anyone please help me?
//here's my touch code that executes every tick.
FVector2D TouchLocation;
APlayerController* ActivePlayerController = UGameplayStatics::GetPlayerController(this, 0);
ActivePlayerController->GetInputTouchState(TouchType, TouchLocation.X, TouchLocation.Y, IsTouched);
if (!IsTouched)
{
DidOnce = false;
}
if (IsTouchMoved())
{
if (!DidOnce)
{
ActivePlayerController->GetInputTouchState(TouchType, PrevX, PrevY, IsTouched);
DidOnce = true;
}
ActivePlayerController->GetInputTouchState(TouchType, X, Y, IsTouched);
float FinalRotYaw = (X - PrevX) * UGameplayStatics::GetWorldDeltaSeconds(this) * 20;
float FinalRotPitch = (Y - PrevY) * UGameplayStatics::GetWorldDeltaSeconds(this) * 20;
AddControllerYawInput(FinalRotYaw);
AddControllerPitchInput(FinalRotPitch);
ActivePlayerController->GetInputTouchState(TouchType, PrevX, PrevY, IsTouched);
}
As I am making a game in Wxwidgets. The place where i am stuck is to jump Mario and take the input when the Mario is jumping in the air. Let me make you clear - When an player press space to jump vertical
the loop to jump Mario will run but when the player presses the "d" key to move forward while jumping it should jump forward.... i also need your help to take two input at the same time like in game when we press shift and "w" the player will walk faster but when we press only "w" key the player will walk slow..
void MyFrame :: OnChar(wxKeyEvent& event){
wxChar uc = event.GetUnicodeKey();
switch ( uc )
{
case 97:
tempx = x;
x = x - 5;
Check(x);
FindGround(x);
CheckForNextMove(x,y,CurrentGroundX,CurrentGroundY,PreviousGroundX,PreviousGroundY,NextGroundX,NextGroundY);
Refresh();
break;
case 100:
tempx =x;
x = x + 5;
Check(x);
FindGround(x);
CheckForNextMove(x,y,CurrentGroundX,CurrentGroundY,PreviousGroundX,PreviousGroundY,NextGroundX,NextGroundY);
Refresh();
break;
case 32:
tempy = y;
for(int i=0;i<=10;i++){
check = true;
tempx = x;
Sleep(1);
y=y-7;
x=x+5;
Check(x);
FindGround(x);
CheckForNextMove(x,y,CurrentGroundX,CurrentGroundY,PreviousGroundX,PreviousGroundY,NextGroundX,NextGroundY);
Update();
Refresh();
}
for(int j=0;j<=10;j++){
check = true;
tempx = x;
Sleep(1);
y=y+7;
x=x+5;
Check(x);
FindGround(x);
CheckForNextMove(x,y,CurrentGroundX,CurrentGroundY,PreviousGroundX,PreviousGroundY,NextGroundX,NextGroundY);
Update();
Refresh();
if(stop){ stop = false; break; }
}
check = false;
Update();
Refresh();
break;
}
event.Skip();
}
here is the code where pressing space bar will make mario to jump in parabolic path but i wanted to make it more professional. I want mario to jump in parabolic when we press two key at the same time i.e. (when I press vertical jump key and right motion key then it will have to jump in right direction in parabolic path.
You need to change your program control flow to only remember that a key was pressed or released in wxEVT_KEY_{DOWN,UP} handlers instead of trying to do everything in wxEVT_CHAR handler.
Also, you definitely shouldn't ever have any calls to Sleep() or long-running loops in the event handlers, so whenever you think about putting them there, you can be sure that you're doing something wrong.
Hi I am building a basic game in wich I have to detect collisions between an array of sprites. For now the sprites just move forward and change direction randomly or when reached a screen edge. The game is made in C++ with my college graphich library.
I implemented a basic algorithm for detecting collisions into this function:
bool DetectarColisionTanques(strTanque tanque1, strTanque tanque2) {
if(
(tanque1.px + tanque1.width >= tanque2.px) &&
(tanque1.px <= tanque2.px + tanque2.width) &&
(tanque1.py + tanque1.height >= tanque2.py) &&
(tanque1.py <= tanque2.py + tanque2.height)
) {
return true;
} else {
return false;
}
}
Sorry that code is in spanish, tanque1 and tanque2 are 2 structs containing each sprite coordinates wich I want to see if collide, px and py are the sprite origin at the upper left edge of the image.
But when I try to run the function i don't get the expected feedback:
void MoverEnemigos(){
for (int i=0;i<nEnemigos;i++) {
switch (enemigos[i].dir) {
case 0: enemigos[i].py-=enemigos[i].vel;break;
case 1: enemigos[i].px+=enemigos[i].vel;break;
case 2: enemigos[i].py+=enemigos[i].vel;break;
case 3: enemigos[i].px-=enemigos[i].vel;break;
for (int k= i+1; k<nEnemigos; k++) {
if(DetectarColisionTanques(enemigos[i],enemigos[k])) {
printf("Collision detected");
printf("\n");
}
}
}
enemigos[i].width= esat::SpriteWidth(spriteTanque[enemigos[i].dir]);
enemigos[i].height= esat::SpriteHeight(spriteTanque[enemigos[i].dir]);
}
}
In this function called MoverEnemigos() I move all the sprites px and py depending on their direction and then I try to call the function DetectarColisionTanques() to see if I get the printf at the same time I see in my graphic window that the sprites are obviously colliding. But I never ever get the printf.
PD: All the functions are running in a while at 60fps.
I'm writing code that draws a polygon and gives it two feet, walks from the right until it gets to the middle, does a flip, and then lands and walks to the left. I'm having a lot of trouble figuring out how to animate his feet. All I want to do is make one go up, then come down, then the other go up, and then come down. I know all I have to do is change the Y values of his feet, but I can't figure out how.
My professor talks about key frames a lot, but wouldn't every step that my "Polyman" would take be a key frame leading to infinite amount of cases? Here is my timer function...
void TimerFunction(int value) //float plx = 7.0, ply=-3.0, linet=0.00;
{
switch(frame)
{
case 1:
dx-=0.15;
plx-=0.15; //dx=polygon, plx = one foot, pl2x = other foot
pl2x-=0.15;
if(dx<=0.0)
{
plx=0.0; //this case makes polyman walk to the middle
dx=0.0;
pl2x=0.0;
frame=2;
}
break;
case 2:
dxt+=0.05;
if (dxt<=-0.00) //this is a triangle I translate over polyman appearing as if he's opening his mouth
{
dxt=0.00;
frame=3;
}
break;
case 3:
dy+=0.2;
theta+=10.0;
thetat+=10.0;
dyt+=0.2; //this is the flip with polyman's mouth open
ply+=0.2;
pl2y+=0.2;
linet2+=10.0;
linet+=10.0;
if(dy>5.0 || theta>360.00)
{
dy=5.0;
dyt=5.0;
ply=5.0;
pl2y=5.0;
linet2=0.0;
theta=0.0;
thetat=0.0;
linet=0.0;
frame=4;
}
break;
case 4:
dy-=0.2;
dyt-=0.2;
ply-=0.2;
pl2y-=0.2;
if(dy<=-3.0) //this is polyman coming back down to earth
{
dy=-3.0;
dyt=-3.0;
ply=-3.0;
pl2y=-3.0;
frame=5;
}
break;
case 5:
dxt-=0.2;
if (dxt<-3)
{ //this is the triangle slowly translating left appearing as if he's closing his mouth
dxt-=3.0;
}
if (dxt<=-8)
{
dxt = -8;
frame = 6;
}
break;
case 6:
dx-= 0.15;
plx-= 0.15;
pl2x-=0.15; //this is polyman walking off the stage to the left
if(dx<=-8.0)
{
dx=-8.0;
plx=-8.0;
pl2x=-8.0;
}
break;
}
glutPostRedisplay();
glutTimerFunc(30, TimerFunction, 1);
}
All variables that are used in my timerfunction are global. Thanks for your time! If you need any more of my code just ask and i'll append.
My first game in ALLEGRO 5 with c++.
It has a player that keeps moving continuously in right direction. From the right edge of the screen player faces obstacles like triangles and squares. These obstacles come alive at right edge of screen and die at left edge of screen.
Suppose X is triangle and O is square.
i want to create them in few combinations like
..{x} {xo} {xoox} {oxxo} {oxx}... And some variations(random maybe)
And after that I will randomize the occurence of these pattern.
SO I found a method to implement what i wanted. I used a switch() to randomly select various cases of combination. It works pretty well. But once in a while it overlaps even after I introduced a minimum gap xoff
Here is the code:
`//I have used srand(time(NULL)); once in main function too.
if(state == PLAYING)
{
ball->Moveball();
ball->Jumpball();
//Camera-----------
ball->Cameraupdate();
al_identity_transform(&camera);
al_translate_transform(&camera,-Cameraposition[0],-Cameraposition[1]);
al_use_transform(&camera);
if(rand() % 200==0)
{
xoff+=200;// to introduce a minimum gap between them but this also fail once in a while.
int ch;
ch=rand()%4;
switch(ch)
{
case 0:
//T
triangle = new Triangle(850 + Cameraposition[0]+xoff,319);
objects.push_back(triangle);
triangle->SetAlive(true);
break;
case 1:
//TT
triangle = new Triangle(850 + Cameraposition[0]+xoff,319);
objects.push_back(triangle);
triangle->SetAlive(true);
triangle = new Triangle(850 +30+ Cameraposition[0]+xoff,319);
objects.push_back(triangle);
triangle->SetAlive(true);
break;
case 2:
//S
square = new Square(850 + Cameraposition[0]+xoff,310);
objects.push_back(square);
square->SetAlive(true);
break;
case 3:
//SS
square = new Square(850 + Cameraposition[0]+xoff,310);
objects.push_back(square);
square->SetAlive(true);
square = new Square(850 +82+ Cameraposition[0]+xoff,310);
objects.push_back(square);
square->SetAlive(true);
break;
}
}
`
Problem solved :(For those who experienced similar doubt)The above code solves the problem of creating random combination of obstacles and generating those combinations randomly. But do check for collisions if you don't want to get overlapping combinations.
Just add another for loop:
void createObstacles(int numObstacles)
{
for(int i = 0; i < numObstacles; i++)
{
if(rand() % 2 == 0)
{
// Create a triangle.
}
else
{
// Create a square.
}
}
}
Call this every time you want to create obstacles, controlling the number of objects released at one time by changing the parameter numObstacles.
You can now do:
if(rand() % 200 == 0)
{
// Create anywhere from 1 to maxToCreate (which is 4) obstacles at a time.
const int maxToCreate = 4;
int numToCreate = (rand() % maxToCreate) + 1;
// Call the function to make some obstacles.
createObstacles(numToCreate);
}
Since your shapes are overlapping, either fix your initialization code to initialize them the way