I assume you're reffering to "<Blitz+ Dir>\samples\Birdie\ISO.bb", right?
Here's the code:
;
;
; ISO Engine in a window by David Bird
;
; quill3d@...
;
w=ClientWidth(Desktop())
h=ClientHeight(Desktop())
Global window=CreateWindow( "ISO by David Bird",(w-640)/2,(h-480)/2,640,480,0,32+7)
canvas=CreateCanvas(0,0,ClientWidth(window),ClientHeight(window),window)
SetGadgetLayout canvas,1,1,1,1
ActivateGadget canvas
menu=CreateMenu("&File",0,WindowMenu(window))
CreateMenu("E&xit",1,menu)
UpdateWindowMenu window
SetBuffer CanvasBuffer(canvas)
Global tiles=LoadAnimImage("tempblocks.bmp",64,64,0,14)
Global objects=LoadAnimImage("objects.bmp",64,32,0,1)
HandleImage objects,23,32
MaskImage objects,255,0,255
HandleImage tiles,32,64
Global G_objectsthatfall=9
Type s_object
Field drawindex ;0=not draw. next ordered drawing
Field typeofobject ;define the type of object
Field control
Field nextobj.s_object
Field clipped ;true if on screen else false
Field widx ;used for bounding box width in x
Field widy ;used for bounding box width in y
Field hgt ;used for bounding box height
Field sx,sy ;converted screen position
Field mx,my,mz ;iso map position
Field image ;object type
Field jump
Field falling#
End Type
Type box
Field min_x
Field min_y
Field min_z
Field max_x
Field max_y
Field max_z
End Type
Global levx,levy
Data 144,144
Data 1,1,1,1,1,1,1,1,1,1
Data 0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0
Data 0,9,9,9,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0
Data 0,0,9,0,9,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0
Data 9,9,9,9,0,9,9,9,9,0
Data 9,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,9,0
Data 0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0
Data 0,0,9,0,9,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0
Data 9,9,9,9,9,9,9,0,0,0
Data 0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0
Data 0,0,0,0,0,0,0,0,0,0
Read levx,levy
;
; No need for each level to have so much data assigned to them
; I will change this. Just for testing it works well..
;
For z=0 To 128 Step 64
For y=0 To 9
For x=0 To 9
Read t
If t>0 Then
obj.s_object=New s_object
If t=9 Then obj\typeofobject=9 Else obj\typeofobject=1
obj\image=0
If t=10 Then
obj\image=1:obj\typeofobject=9
obj\mx=(x*16)
obj\my=y*16
obj\mz=z
obj\widx=9
obj\widy=13
obj\hgt=1
Else
obj\mx=x*16
obj\my=y*16
obj\mz=z
obj\widx=15
obj\widy=15
obj\hgt=31
End If
End If
Next
Next
Next
Global coll.s_object ;// used for pushing objects
Global player.s_object=New s_object
player\typeofobject=999
player\mz=128
player\mx=0
player\my=0
player\image=501
player\widx=15
player\widy=15
player\hgt=63
Global p2.s_object=New s_object
Global jump
p2\typeofobject=998
p2\image=500
timer=CreateTimer(120)
Repeat
Select WaitEvent()
Case $802 ;window size
While WindowMinimized(window)
WaitEvent() ;should handle window close here...
Wend
Case $803 ;window close
If Confirm( "Really Quit?" )
Exit
EndIf
Case $1001 ;menu action!
Select EventData()
Case 1
If Confirm( "Really Quit?" )
Exit
EndIf
Case 101
Notify "Insectoids! (in a window...)"
End Select
Case $2001 ;suspend!
While WaitEvent()<>$2002
Wend
Case $4001
Updateit
FlipCanvas canvas
FlushEvents $4001
End Select
Forever
Delete Each s_object
Delete Each box
FreeImage tiles
End
Function Updateit()
Cls
Sort_N_Draw() ;sort all objects into order and draw them to screen
kdone=False
coll=Null
If KeyDown(203) And player\mx>0 And kdone=False
If retcheckmove(-1,0,0,player) Then
kdone=True
player\mx=player\mx-1
Else
;check for push object
If coll<>Null Then
If coll\mx>0 Then
checkmove(-1,0,0,coll)
End If
End If
End If
End If
If KeyDown(205) And player\mx<levx And kdone=False
If retcheckmove(1,0,0,player) Then
kdone=True
player\mx=player\mx+1
Else
;check for push object
If coll<>Null Then
If coll\mx<levx Then
checkmove(1,0,0,coll)
End If
End If
End If
End If
If KeyDown(200) And player\my>0 And kdone=False
If retcheckmove(0,-1,0,player) Then
kdone=True
player\my=player\my-1
Else
;check for push object
If coll<>Null Then
If coll\my>0 Then
checkmove(0,-1,0,coll)
End If
End If
End If
End If
If KeyDown(208) And player\my<levy And kdone=False
If retcheckmove(0,1,0,player) Then
kdone=True
player\my=player\my+1
Else
;check for push object
If coll<>Null Then
If coll\my<levy Then
checkmove(0,1,0,coll)
End If
End If
End If
End If
If KeyDown(57) And jump=0 And (retcheckmove(0,0,-1,player)=False Or player\mz=32) Then
player\jump=32
player\falling=8
EndIf
;
If player\jump>0 Then
player\falling=player\falling-.25
If player\falling=-1 Then player\falling=0
If retcheckmove(0,0,player\falling,player) Then
player\mz=player\mz+player\falling
Else
If coll<>Null Then
If coll\my<levy Then
checkmove(0,0,player\falling,coll)
End If
End If
End If
player\jump=player\jump-1
End If
check_objects_fall()
;
; draw bottom of object
;
p2\mx=player\mx
p2\my=player\my
p2\mz=player\mz-32
End Function
;
; transpose iso x,y & z to screen x,y
;
Function RetScnX(mapx,mapy,mapz)
Return 320+(mapx*2)-(mapy*2)
End Function
Function RetScnY(mapx,mapy,mapz)
Return 192+mapx+mapy
End Function
;
; function to do all culling and ordering
; of each obect in game. This works very well for most instances
; any object that is off screen then it will
; be excluded from calcuations speeds things up a bit
;
; draws all at end of sorting
Function Sort_N_Draw()
object_count=0 ;how many objects are on screen
For a.s_object=Each s_object
a\drawindex=0
a\sx=RetScnX(a\mx,a\my,a\mz) ;converts all object map coords to screen coords
a\sy=RetScnY(a\mx,a\my,a\mz)
If a\sx>-32 And a\sx<672 Then ;check if within screen rect x
If a\sy>-64 And a\sy<542 Then ;check if within screen rect y
a\clipped=True ;set object true if within screen rect
object_count=object_count+1 ;increase object count
Else
a\clipped=False
End If
Else
a\clipped=False
End If
Next
For b=1 To object_count+1
ymax=999999999
For a.s_object=Each s_object
If a\clipped=True Then
If a\drawindex=0 Then
If a\sy+a\mz<=ymax Then
ymax=a\sy+a\mz
thisone.s_object=a
End If
End If
End If
Next
If thisone<>Null Then
If b=1 Then
lastone.s_object=thisone
firstone.s_object=thisone
Else
lastone\nextobj.s_object=thisone
lastone.s_object=thisone
End If
thisone\drawindex=b
thisone=Null
End If
Next
For b=1 To object_count
draw_block_image(firstone\sx,firstone\sy-firstone\mz,firstone\image)
firstone.s_object=firstone\nextobj
Next
End Function
;
; Do to boxes collide
;
Function BoxColl(ob1.s_object,d1x,d1y,d1z,ob2.s_object)
t1.box=New box
t1\min_x=ob1\mx+d1x:t1\max_x=ob1\mx-ob1\widx+d1x
t1\min_y=ob1\my+d1y:t1\max_y=ob1\my-ob1\widy+d1y
t1\min_z=ob1\mz+d1z:t1\max_z=ob1\mz-ob1\hgt+d1z
t2.box=New box
t2\min_x=ob2\mx:t2\max_x=ob2\mx-ob2\widx
t2\min_y=ob2\my:t2\max_y=ob2\my-ob2\widy
t2\min_z=ob2\mz:t2\max_z=ob2\mz-ob2\hgt
havetouched=False
If (((t1\min_x>=t2\min_x) And (t1\max_x<=t2\min_x)) Or ( (t1\min_x>=t2\max_x) And (t1\max_x<=t2\max_x))) Then
If (((t1\min_y>=t2\min_y) And (t1\max_y<=t2\min_y)) Or ( (t1\min_y>=t2\max_y) And (t1\max_y<=t2\max_y))) Then
If (((t1\min_z>=t2\min_z) And (t1\max_z<=t2\min_z)) Or ( (t1\min_z>=t2\max_z) And (t1\max_z<=t2\max_z))) Then
havetouched=True
End If
End If
End If
Delete Each box
Return havetouched
End Function
;
; Check a movement of a box
; returns true if ok to move
; also moves object after check
; stops pushing of illigal ojects
;
Function checkmove(x,y,z,obj.s_object)
canmove=True
coll=Null
For a.s_object=Each s_object
If a<>obj Then
If a\typeofobject<>998 Then
If BoxColl(obj,x,y,z,a)=True Then canmove=False:coll=a
End If
End If
Next
If canmove=True Then
If obj\typeofobject>=G_objectsthatfall
obj\mx=obj\mx+x
obj\my=obj\my+y
obj\mz=obj\mz+z
End If
End If
Return canmove
End Function
;
; Check a movement of a box
; returns true if ok to move
;
Function retcheckmove(x,y,z,obj.s_object)
canmove=True
coll=Null
For a.s_object=Each s_object
If a<>obj Then
If a\typeofobject<>998 Then
If BoxColl(obj,x,y,z,a)=True Then canmove=False:coll=a
End If
End If
Next
Return canmove
End Function
;
; Check if objects that can fall
; are in a position to fall
;
Function Check_Objects_Fall()
; First check for player
If player\mz>32 And player\jump=0 Then
player\falling=player\falling+.25
If player\falling=9 Then player\falling=8
If retcheckmove(0,0,-player\falling,player) Then
player\mz=player\mz-player\falling
Else
player\falling=0
End If
Else
If player\mz<32 Then player\mz=32
End If
;check all other objects
For a.s_object=Each s_object
If a<>player
If a\typeofobject>=G_objectsthatfall Then
If a\mz>0 And a\jump=0 Then
a\falling=a\falling+.25
If a\falling=9 Then a\falling=8
If retcheckmove(0,0,-a\falling,a) Then
a\mz=a\mz-a\falling
Else
a\falling=0
End If
Else
If a\mz<0 Then a\mz=0
End If
End If
End If
Next
End Function
;
; Draw a image
;
Function Draw_Block_Image(x,y,typ)
Select typ
Case 0
DrawImage tiles,x,y,0
Case 1
DrawImage objects,x,y,0
Case 2
DrawImage tiles,x,y,2
Case 3
DrawImage tiles,x,y,3
Case 4
DrawImage tiles,x,y,4
;// Next two are for players image
Case 500
DrawImage tiles,x,y,0
Case 501
DrawImage tiles,x,y,0
End Select
End Function
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