Limit on amount of keypresses?

[3DModelerMan]

It seems like there's a limit to the number of keyboard events you can test at once. Although it wouldn't make since based on what I have implemented. I have a movement system and that has jumping support. But when you try to jump when traveling in the up/left direction. It doesn't register a keypress. I'll post code later.

[randomMesh]

This is an issue of your keyboard, try another one.
Please read about the keyboard switch matrix.

[3DModelerMan]

Yeah but if I do the same in the up/right direction it works fine.
here's my code

Code: Select all

//{straight
if ( receiver.IsKeyDown(KEY_UP) )
{
 irrSimplePhysics->addObjectUserForce(ipObject, vector3df( +move_speed * vecForce.X, irrSimplePhysics->getGravity().Y , +move_speed * vecForce.Z ) );
}

if ( receiver.IsKeyDown(KEY_DOWN) )
{
 irrSimplePhysics->addObjectUserForce(ipObject, vector3df( -move_speed * vecForce.X, irrSimplePhysics->getGravity().Y , -move_speed * vecForce.Z ) );
}
//}

//{side

if ( receiver.IsKeyDown(KEY_RIGHT) )
{
 irrSimplePhysics->addObjectUserForce(ipObject, vector3df( +move_speed * vecForceSide.X, irrSimplePhysics->getGravity().Y , +move_speed * vecForceSide.Z ) );
}

if ( receiver.IsKeyDown(KEY_LEFT) )
{
 irrSimplePhysics->addObjectUserForce(ipObject, vector3df( -move_speed * vecForceSide.X, irrSimplePhysics->getGravity().Y , -move_speed * vecForceSide.Z ) );
}

//}

that moves the character,

Code: Select all

//{rotation

if ( receiver.IsKeyDown(KEY_UP) )
{
 render_mesh->setRotation( vector3df( 0 , cam_control->getRotation().Y-180 , 0 ) );
}

if ( receiver.IsKeyDown(KEY_RIGHT) )
{
 render_mesh->setRotation( vector3df( 0 , cam_control->getRotation().Y-90 , 0 ) );
}

if ( receiver.IsKeyDown(KEY_LEFT) )
{
 render_mesh->setRotation( vector3df( 0 , cam_control->getRotation().Y+90 , 0 ) );
}

if ( receiver.IsKeyDown(KEY_DOWN) )
{
 render_mesh->setRotation( vector3df( 0 , cam_control->getRotation().Y , 0 ) );
}

if ( receiver.IsKeyDown(KEY_RIGHT) && receiver.IsKeyDown(KEY_UP) )
{
 render_mesh->setRotation( vector3df( 0 , cam_control->getRotation().Y-135 , 0 ) );
}

if ( receiver.IsKeyDown(KEY_LEFT) && receiver.IsKeyDown(KEY_UP) )
{
 render_mesh->setRotation( vector3df( 0 , cam_control->getRotation().Y+135 , 0 ) );
}

if ( receiver.IsKeyDown(KEY_RIGHT) && receiver.IsKeyDown(KEY_DOWN) )
{
 render_mesh->setRotation( vector3df( 0 , cam_control->getRotation().Y-45 , 0 ) );
}

if ( receiver.IsKeyDown(KEY_LEFT) && receiver.IsKeyDown(KEY_DOWN) )
{
 render_mesh->setRotation( vector3df( 0 , cam_control->getRotation().Y+45 , 0 ) );
}

//}

that rotates,

Code: Select all

if ( receiver.IsKeyDown(KEY_SPACE) && jump_key_flag == true )
 {
  irrSimplePhysics->setObjectUserForce(ipObject, vector3df( 0 , jump_str , 0 ) );
  
  jump_key_flag = false;
 }

 if ( receiver.IsKeyDown(KEY_SPACE) == false )
 {
  jump_key_flag = true;
 }

[Lonesome Ducky]

Happens on my keyboard in non-irrlicht games. I think randomMesh was right.

[3DModelerMan]

How can I fix it then? It still happens if I comment out the rotation stuff to. And not when I move in either up/right or down/left directions.

[3DModelerMan]

Well it works with my joystick. So it's definitely a keyboard problem.

[hybrid]

Well, just reading the link randomMesh gave you is not enough. You also have to *understand* it. Please, do us a favor and solve your general computer problems in other forums...

[Dorth]

The answer is honestly spelled in full letters in that link. There is no point adding to that, it's all answered.

[3DModelerMan]

Should I just put in the option of using ENTER to jump also? I know on
another PC SPACE works pretty well (the keyboard's wired different).

[wyrmmage]

a post that might help you out: http://www.idevgames.com/forum/showthread.php?p=145203

[Kojack]

This problem has existed as long as standard pc keyboards have.
It used to be really annoying playing Mortal Kombat 3 with 2 players on one keyboard, holding certain keys (like a diagonal jump) would block your opponent from doing certain attacks.

Some keyboards handle it better than others. The Razer Lycosa keyboard is designed so the WASD keys don't block other nearby keys, and the Razer Tarantula keyboard claims on it's feature page to allow up to 10 keys to be help at once before they start blocking each other.

The only way to avoid it (apart from using a game controller instead of a keyboard) is to use try different keys, or buy a different model of keyboard and hope. Since keyboards can handle this differently, a key combo that works for one person could fail for another.