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Jumping

Blitz3D Forums/Blitz3D Beginners Area/Jumping

Rook Zimbabwe(Posted 2004) [#1]
OK so I am still experimenting with a jump command... I did this in my game to move the dude up when the spacebar is pressed... only problem is if you hit the spacebar repeatedly you jump like the hulk (up and up and up but not away!)

So I thought I would create an instance that you couldn't jump for a few seconds after the first spacebar press... you know to limit the jumpage... I did this:

But it doesn't work. I set the flag jumpflag to 0 before starting the main program loop. I also plonked a bit after render that would show me the status of jumpflag... it stays at 1 all the time... 1 is true isn't it. Where does my logic fail?

Keeping in mind that I am not an exteremely logical person!
-RZ


WolRon(Posted 2004) [#2]
It appears by your indentation that you intend all of this 
If KeyHit(57)=True And jumpflag = False Then For jasc=1 To 90 
	TranslateEntity camera,+0,+1,+0
	Next
	For jasc=90 To 1
	MoveEntity camera,0,-1,0
	Next
	oldtime=MilliSecs()
	If MilliSecs()< oldtime + 5000 Then jumpflag=True Else jumpflag = False
to be contained within your If Keyhit(57) condition.
To do that, you need to take the "Then For jasc=1 To 90" statement off of the IF line and move it down to the next line. You also need an ENDIF statement after the last line like this:
If KeyHit(57)=True And jumpflag = False
  For jasc=1 To 90 
    TranslateEntity camera,+0,+1,+0
  Next
  For jasc=90 To 1
    MoveEntity camera,0,-1,0
  Next
  oldtime=MilliSecs()
  If MilliSecs()< oldtime + 5000 Then jumpflag=True Else jumpflag = False
Endif


However, none of the above is going to work anyways because you are jumping your camera up 90 units and then down 90 units all within the same frame!

Change your code to something like this:
If KeyHit(57)=True And jumpflag = False
  jumpflag = True
  oldtime=MilliSecs()
Endif

If jumpflag = True
  TranslateEntity camera,+0,+2,+0 ;need 2 units in order to counteract gravity
  If MilliSecs() > oldtime+500 Then jumpflag=False
Endif
Notice that we are only moving the camera up. I reduced your jump time to 500ms. I doubt you actually wanted it to jump for 5 whole seconds?

And then just let your gravity section of code bring him back down :)
y#=y#-1
Of course, actual gravity increases velocity with time, but what you have here will work for now...


Rook Zimbabwe(Posted 2004) [#3]
Thats what it is... all in the same frame??? OY!!! <--- SLAPPING HEAD and thereby increasing bald spot...

Will try your idea. I can get him to jump but it is too fast!

Thanks

-Rook


Rook Zimbabwe(Posted 2004) [#4]
It does work!!! I get a "ENDIF without IF" on the last endif but I deleted that and changed the value of UP translation a bit and all works well!!! : )

Thank you WolRon!