Try this example :)
;Break glass example, by Jeppe Nielsen 2003
Type glass
Field e
Field s
Field w#,h#
Field sx#,sy#
Field broken
End Type
Type glasspiece
Field p
Field pivot[3]
Field x#,y#,z#
Field vx#,vy#,vz#
Field pitch#,yaw#,roll#
Field g.glass
Field index
End Type
Const gravity#=0.004
Graphics3D 800,600,16,2
pivot=CreatePivot()
camera=CreateCamera(pivot)
CameraClsColor camera,255,255,255
MoveEntity camera,0,1,-4
light=CreateLight(1)
RotateEntity light,-10,40,0
g.glass=glassnew(2,2,20,20)
PositionEntity g\e,0,0,-1
g.glass=glassnew(2,2,20,20)
PositionEntity g\e,0,0,1
g.glass=glassnew(2,2,20,20)
PositionEntity g\e,0,0,-1
TurnEntity g\e,0,90,0
g.glass=glassnew(2,2,20,20)
PositionEntity g\e,2,0,-1
TurnEntity g\e,0,90,0
Color 0,0,0
Repeat
TurnEntity pivot,0,1,0
If MouseHit(1)>0
p=CameraPick(camera,MouseX(),MouseY())
g.glass=Last glass
While g<>Null
If g\e=p
glassbreak(g)
Exit
EndIf
g=Before g
Wend
EndIf
glassupdate()
RenderWorld()
mx=MouseX()
my=MouseY()
Text 400,20,"SHOOT the glass cube :)",1
Oval mx-30,my-30,60,60,0
Plot mx,my
Flip
Until KeyDown(1)
End
Function glassnew.glass(wid#,hei#,secx,secy,parent=0)
g.glass=New glass
g\w#=wid#
g\h#=hei#
g\e=CreateMesh(parent)
g\s=CreateSurface(g\e)
dx#=1/Float(secx)
dy#=1/Float(secy)
g\sx#=dx#
g\sy#=dy#
y#=0
For yy=1 To secy
x#=0
For xx=1 To secx
gp.glasspiece=New glasspiece
gp\g=g
gp\index=AddVertex(g\s,x#,y#,0,x#,y#,0)
AddVertex(g\s,x#+dx#,y#,0,x#+dx#,y#,0)
AddVertex(g\s,x#,y#+dy#,0,x#,y#+dy#,0)
AddVertex(g\s,x#+dx#,y#+dy#,0,x#+dx#,y#+dy#,0)
AddTriangle g\s,gp\index,gp\index+3,gp\index+1
AddTriangle g\s,gp\index,gp\index+3,gp\index+2
x#=x#+dx#
Next
y#=y#+dy#
Next
ScaleMesh g\e,wid#,hei#,1
EntityFX g\e,16
EntityPickMode g\e,2
EntityColor g\e,0,0,255
EntityAlpha g\e,0.5
Return g
End Function
Function glassbreak(g.glass)
If g\broken=1 Then Return
g\broken=1
For gp.glasspiece=Each glasspiece
If gp\g=g
gp\p=CreatePivot()
gp\x#=(VertexX(g\s,gp\index)+VertexX(g\s,gp\index+3))/2
gp\y#=(VertexY(g\s,gp\index)+VertexY(g\s,gp\index+3))/2
gp\z#=(VertexZ(g\s,gp\index)+VertexZ(g\s,gp\index+3))/2
gp\vx#=Rnd(-.02,.02)
gp\vy#=Rnd(-.02,.02)
gp\vz#=Rnd(-.02,.02)
gp\pitch#=Rnd(-2,2)
gp\yaw#=Rnd(-2,2)
gp\roll#=Rnd(-2,2)
PositionEntity gp\p,gp\x,gp\y,gp\z
For n=0 To 3
gp\pivot[n]=CreatePivot(gp\p)
PositionEntity gp\pivot[n],VertexX(g\s,gp\index+n),VertexY(g\s,gp\index+n),VertexZ(g\s,gp\index+n),1
Next
EndIf
Next
End Function
Function glassupdate()
For g.glass=Each glass
If g\broken=1
For gp.glasspiece=Each glasspiece
If gp\g=g
gp\vy=gp\vy-gravity#
gp\x=gp\x+gp\vx
gp\y=gp\y+gp\vy
gp\z=gp\z+gp\vz
PositionEntity gp\p,gp\x+gp\g\sx#/2,gp\y+gp\g\sy#/2,gp\z,1
TurnEntity gp\p,gp\pitch,gp\yaw,gp\roll
For n=0 To 3
VertexCoords gp\g\s,gp\index+n,EntityX(gp\pivot[n],1),EntityY(gp\pivot[n],1),EntityZ(gp\pivot[n],1)
Next
If gp\y<-10 Then glassdelete(g)
EndIf
Next
EndIf
Next
End Function
Function glassdelete(g.glass)
For gp.glasspiece=Each glasspiece
If gp\g=g
For n=0 To 3
FreeEntity gp\pivot[n]
Next
FreeEntity gp\p
Delete gp
EndIf
Next
FreeEntity g\e
Delete g
End Function
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