Bullet Raycasting

[Shard]

I had a few questions about doing bullet raycasting.

 

I have a gun, whose position and range I know. How do I do a raycast in a straight line from the gun? What I'm really meaning to ask is, if the player is turned sideway, what value should I increment so that the raycast is performed in a straight line from the players perspective?

 

 

Also, the Pick will return a Pick Object which will have a TEntity object in it. I recall a long time ago that it was possible to create a pointer to my coded classes (for enemies and whatnot) using , I think, Object userdata. Does anyone know how this works?

 

 

Basically I want to be able to trace if what was hit with the raycast, and if its a AI type, reduce its health. If its a wall, etc, create a bullet hole texture.

[Shard]

Anyone here?

[Dealman]

Maybe you'd get better luck by posting in the Materials, Textures, & Shaders and/or Programming

[cassius]

I would like some help on this too. I have a gun set up with sound effect and muzzleflash, but how to fire bullets????????

[Masterxilo]

Also, the Pick will return a Pick Object which will have a TEntity object in it. I recall a long time ago that it was possible to create a pointer to my coded classes (for enemies and whatnot) using , I think, Object userdata. Does anyone know how this works?

That would require something like:

 

class MyCube
{
public:
   MyCube()
   {
       m_entity = CreateCube();
       SetEntityUserData(m_entity, static_cast<BP>(this));
   }
private:
   TEntity m_entity;
};

 

and then, once you know the picked entity:

 

MyCube& pickedCubeInstance = *(reinterpret_cast<MyCube*>(GetEntityUserData(pick.entity)));

untested, but this is the concept

 

I agree, this should rather be posted in the programming section.

 

As for the first question, if your game is a FPS, just use CameraPick from the middle of the screen.

If not, use a LinePick starting at the weapon model origin and ending at the point (0,0,<weaponrange>) relative to the weapon, converted to global coordinates using

TFormVector.

[Shard]

That would require something like:

 

class MyCube
{
public:
   MyCube()
   {
       m_entity = CreateCube();
       SetEntityUserData(m_entity, static_cast<BP>(this));
   }
private:
   TEntity m_entity;
};

 

and then, once you know the picked entity:

 

MyCube& pickedCubeInstance = *(reinterpret_cast<MyCube*>(GetEntityUserData(pick.entity)));

untested, but this is the concept

 

I agree, this should rather be posted in the programming section.

 

As for the first question, if your game is a FPS, just use CameraPick from the middle of the screen.

If not, use a LinePick starting at the weapon model origin and ending at the point (0,0,<weaponrange>) relative to the weapon, converted to global coordinates using

TFormVector.

 

 

Thanks for that, TFormVector is what I was looking for. Just a quick question, how do I determine the position of the center of the screen?

[Masterxilo]

GraphicsWidth()/2, GraphicsHeight()/2

[Shard]

GraphicsWidth()/2, GraphicsHeight()/2

 

I meant the 3D position of the center of the screen.

[Joh]

I meant the 3D position of the center of the screen.

WHAT??? This doesn't exist.. Your screen is 2d

Well i think you mean how to transform from 2d to 3d pos right? Check CameraProject , CameraUnproject .

Also wich language you need? We could help you better if we know the language.