Drawing a texture at the end of a trace (crosshair?) UDK
- by Dave Voyles
I'm trying to draw a crosshair at the end of my trace.
If my crosshair does not hit a pawn or static mesh (ex, just a skybox) then the crosshair stays locked on a certain point at that actor - I want to say its origin.
Ex: Run across a pawn, then it turns yellow and stays on that pawn. If it runs across the skybox, then it stays at one point on the box. Weird?
How can I get my crosshair to stay consistent? I've included two images for reference, to help illustrate.
Note: The wrench is actually my crosshair. The "X" is just a debug crosshair. Ignore that.
/// Image 1 ///
/// Image 2 ///
/***************************************************************************
* Draws the crosshair
***************************************************************************/
function bool CheckCrosshairOnFriendly()
{
local float CrosshairSize;
local vector HitLocation, HitNormal, StartTrace, EndTrace, ScreenPos;
local actor HitActor;
local MyWeapon W;
local Pawn MyPawnOwner;
/** Sets the PawnOwner */
MyPawnOwner = Pawn(PlayerOwner.ViewTarget);
/** Sets the Weapon */
W = MyWeapon(MyPawnOwner.Weapon);
/** If we don't have an owner, then get out of the function */
if ( MyPawnOwner == None )
{
return false;
}
/** If we have a weapon... */
if ( W != None)
{
/** Values for the trace */
StartTrace = W.InstantFireStartTrace();
EndTrace = StartTrace + W.MaxRange() * vector(PlayerOwner.Rotation);
HitActor = MyPawnOwner.Trace(HitLocation, HitNormal, EndTrace, StartTrace, true, vect(0,0,0),, TRACEFLAG_Bullet);
DrawDebugLine(StartTrace, EndTrace, 100,100,100,);
/** Projection for the crosshair to convert 3d coords into 2d */
ScreenPos = Canvas.Project(HitLocation);
/** If we haven't hit any actors... */
if ( Pawn(HitActor) == None )
{
HitActor = (HitActor == None) ? None : Pawn(HitActor.Base);
}
}
/** If our trace hits a pawn... */
if ((Pawn(HitActor) == None))
{
/** Draws the crosshair for no one - Grey*/
CrosshairSize = 28 * (Canvas.ClipY / 768) * (Canvas.ClipX /1024);
Canvas.SetDrawColor(100,100,128,255);
Canvas.SetPos(ScreenPos.X - (CrosshairSize * 0.5f), ScreenPos.Y -(CrosshairSize * 0.5f));
Canvas.DrawTile(class'UTHUD'.default.AltHudTexture, CrosshairSize, CrosshairSize, 600, 262, 28, 27);
return false;
}
/** Draws the crosshair for friendlies - Yellow */
CrosshairSize = 28 * (Canvas.ClipY / 768) * (Canvas.ClipX /1024);
Canvas.SetDrawColor(255,255,128,255);
Canvas.SetPos(ScreenPos.X - (CrosshairSize * 0.5f), ScreenPos.Y -(CrosshairSize * 0.5f));
Canvas.DrawTile(class'UTHUD'.default.AltHudTexture, CrosshairSize, CrosshairSize, 600, 262, 28, 27);
return true;
}
