Collision Detection And Objects.....

[JSG]

ok i am tring to write a multi-collision detection function that will check through all objects in an array......heres the source code.....

__________________________________________________
Class Object "Player" with collision detection method.....
__________________________________________________

Private fall As Boolean
Private DestRectPlayer As RECT

Public Property Get fallo() As Boolean
fall = fall
End Property

Public Property Let DestinationRect(NewValue As RECT)
DestinationRect = NewValue
End Property

Public Property Get DestinationRect() As RECT
DestinationRect = DestRectPlayer
End Property


Public Sub MultiCollision(ObjectArray As Object, PartOfArray As Boolean, NumberInArray As Integer, TotalNumberInArray As Integer)

If fall = True Then
Exit Sub
End If

Dim TempRect As RECT

If PartOfArray = True Then

For i = 1 To (NumberInArray - 1)
fall = IntersectRect(TempRect, DestRectPlayer, ObjectArray(i).DestinationRect)
If fall = True Then
Exit Sub
End If
Next i

For i = (NumberInArray + 1) To TotalNumberInArray
fall = IntersectRect(TempRect, DestRectPlayer, ObjectArray(i).DestinationRect)
If fall = True Then
Exit Sub
End If
Next i

Else

For i = 1 To TotalNumberInArray
fall = IntersectRect(TempRect, DestRectPlayer, ObjectArray(i).DestinationRect)
If fall = True Then
Exit Sub
End If
Next i

end if

End Sub

______________________________________
Form Calling It....
______________________________________

Dim objPlayers(1 To 10) As New Class1

Private Sub Form_Load()

With objPlayers(1).DestinationRect
.Right = 30
.Bottom = 30
End With

With objPlayers(4).DestinationRect
.Left = 15
.Top = 15
.Bottom = 45
.Right = 45
End With

Call objPlayers(1).MultiCollision(objPlayers, True, 1, 10)

End Sub

___________________________________________________
Module With Inserect API....
__________________________________________________

public Declare Function IntersectRect Lib "user32" (lpDestRect As RECT, lpSrc1Rect As RECT, lpSrc2Rect As RECT) As Long

_______________

when ever i run it i get a "byref argument type miss matched" error highlighting the "objplayers(1)" when calling it....now to me that sounds like i have spelt .DestinationRect wrong in the function...but i havent......i have been trying to figure this out for 2 days......any help please?

Thanks in advance....

[Sastraxi]

You must put ObjectArray() As Object I believe...

[JSG]

ok, i am making progress

i get another error though...."type mismatch:array or user defined type expected" highlighting, again, objplayers when calling it.....now i thought that it was an array (declared "Public objPlayers(1 To 10) As New Class1" in module....) i tried calling it with objplayers() but that doesent work either.....

[Zaei]

I only looked through your code for a bit, but I want to try a bit of function re-writing. Here we go.

Private fall As Boolean 
Private DestRectPlayer As RECT 

Public Property Get fallo() As Boolean 
fallo = fall 
End Property

Otherwise your Propery Get wont do anything.

You are trying to detect collisions between all objects, correct?

For i = 0 to UBound(ObjectArray)
    For j = 0 to UBound(ObjectArray)
        if not (i = j) then ' we dont want to check the object against itself
            'IntersectRect stuff goes here
        end if
    Next j
Next i

This will check each object against all other objects.

The last thing is, You detect collisions, but how are you going to handle them? You need to think about that.

Z.

[JSG]

thanks alot for the re-write.....i never thought of doing in that way! but i am still having trouble passing an array to the function...keep getting "type mismatch:array or user defined type expected" error......is there a trick or something that i am missing?

[Zaei]

Post some current code so we can see what you are doing. Format it with [ code] and [ /code] tags (without the spaces).

Z.

[Fox]

yay, use [code] and [/code] or use my code-formatting utility (see signature)

[JSG]

ok, first i would just like to say thanks for helping me out

i wrote this little example to show you what i mean......

Class Module ("class1")
________________________

 Private test As Integer ' the local variable of property Ptest
Public Property Let Ptest(ByVal vData As Integer) 
    test = vData
End Property


Public Property Get Ptest() As Integer
    Ptest = test
End Property

Public Sub MsgBoxTest(object()  As Object, TotalNumberInArray As Integer) 

    For i = 1 To TotalNumberInArray
        MsgBox object(i).Ptest
    Next i
End Sub

________________________

Form From Where i am calling Objects ("form1")
________________________

Private test(1 To 5) As New Class1 

Private Sub Form_Load()
test(1).Ptest = 1 
test(2).Ptest = 2
test(3).Ptest = 3
test(4).Ptest = 4
test(5).Ptest = 5

test(1).MsgBoxTest test , 5

End Sub

_________________________

when i run it i get a "Type Mismatch: Array or User Defined Type Expected" error....with it highlighting test (in red...) now i thought i declared it as an array? (blue) and i added those bracets when declaring the function (teal).

thanks for your help.

[kedaman]

parameter object() As Object should be object() As Class1, it won't be smart enough to cast down all class1 in array to object, in case you want other arrays than class1 arrays to be passed as well declare the parameter variant, but this will be a greater peformance hog

[JSG]

thanks alot!