Graphics3D 800,600,16,2
cam=CreateCamera()
RotateEntity cam,90,0,0
PositionEntity cam,0,50,0
;create player entity
player=CreateSphere()
EntityFX player,1
;create 10 randomly positioned creatures, with random velocity aswell
For n=1 To 10
creaturenew(Rnd(-20,20),0,Rnd(-20,20),Rnd(0.1,0.5))
Next
Repeat
;make the creatures home in on player
creatureupdate(EntityX(player),EntityY(player),EntityZ(player))
;control player with mouse
PositionEntity player,MouseX()/10-30,0,-MouseY()/10+30
RenderWorld
Text 400,0,"Control player with mouse",1,0
Text 400,20,"Creatures will not slide into each other",1,0
Flip
Until KeyDown(1)
End
Type creature
Field e ;entity
Field vel# ;velocity
End Type
Function CreatureNew(x#,y#,z#,vel#)
c.creature=New creature
c\e=CreateCube()
c\vel=vel
PositionEntity c\e,x,y,z
End Function
Function CreatureUpdate(x#,y#,z#,size#=2) ;size is 2 here as a created cube is 2 units wide
For c.creature=Each creature
;vector to x,y,z
dx#=(x-EntityX(c\e))
dy#=(y-EntityY(c\e))
dz#=(z-EntityZ(c\e))
;length of vector
l#=Sqr(dx*dx+dy*dy+dz*dz)
;make the vector a unit vector, length = 1
dx=dx/l
dy=dy/l
dz=dz/l
TranslateEntity c\e,dx*c\vel,dy*c\vel,dz*c\vel
For cc.creature=Each creature
;do not test against it self
If cc<>c
;vector to another enemy
dx#=(EntityX(cc\e)-EntityX(c\e))
dy#=(EntityY(cc\e)-EntityY(c\e))
dz#=(EntityZ(cc\e)-EntityZ(c\e))
;length of vector
l#=Sqr(dx*dx+dy*dy+dz*dz)
;enemies collide if they er within range:
If l<size
;make the vector a unit vector, length = 1
dx=dx/l
dy=dy/l
dz=dz/l
TranslateEntity c\e,-dx*c\vel,-dy*c\vel,-dz*c\vel
EndIf
EndIf
Next
Next
End Function |
