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Lightmesh in realtime ?

Blitz3D Forums/Blitz3D Programming/Lightmesh in realtime ?

Filax(Posted 2003) [#1]
Hi english community

i have find this in the code archive, and i want this effect for realtime animated objects ? how can do this ?

Plzz


Graphics3D 640,480,16
;AmbientLight 0,0,0
For x=1 To 5
For y= 1 To 5
For z= 1 To 5
sphere=CreateSphere( 32 )
PositionEntity sphere,x*5,y*5,z*5
ApplyAmbient(sphere,32,32,32)
ApplyLight(sphere,25,0,0,20,1,255,32,32)
ApplyLight(sphere,0,0,0,20,1,32,32,255)
ApplyLight(sphere,12.5,25,0,20,1,32,255,32)
ApplyLight(sphere,25,0,15,20,1,32,255,32)
ApplyLight(sphere,0,0,15,20,1,255,32,32)
ApplyLight(sphere,12.5,25,15,20,1,32,32,255)
ApplyLight(sphere,25,0,20,20,1,32,255,255)
ApplyLight(sphere,0,0,20,20,1,255,255,32)
ApplyLight(sphere,12.5,25,20,20,1,255,32,255)
ApplyLight(sphere,12.5,12.5,12.5,20,1,255,255,255)
EntityFX sphere,3
Next
Next
Next


camera=CreateCamera()
PositionEntity camera,12,12,2
RotateEntity camera,0,0,315

While Not KeyHit(1)
UpdateWorld
RenderWorld
Flip
Wend


Function ApplyLight(entity,LX#,LY#,LZ#,radius#,flag,Lr,Lg,Lb)
;Lambert shading in blitz "by Staton Richardson (Arbitrage)"
;This function is meant for 1 time lighting not realtime
;entity is the entity you wish to light
;LX, LY, LZ are the coodinates of the light in world space
;Lr, Lg, Lb are the colors of the light
;radius is the radius the light affects. Light falls off with distance so half the radius would be half the light
;flag tells the function to include the current vertex color for multiple lights


count=CountSurfaces(entity)
For n=1 To count
surf=GetSurface(entity,n)
Vcount=CountVertices(surf)-1
For v=0 To Vcount
xd#=VertexX(surf,v)+EntityX(entity)-LX#
yd#=VertexY(surf,v)+EntityY(entity)-LY#
zd#=VertexZ(surf,v)+EntityZ(entity)-LZ#
mag#=Sqr(xd#*xd# + yd#*yd# + zd#*zd#)

If flag=1
vcr=VertexRed(surf,v)
vcg=VertexGreen(surf,v)
vcb=VertexBlue(surf,v)
EndIf

vr=Lr-(Lr/radius)*mag#
vg=Lg-(Lg/radius)*mag#
vb=Lb-(Lb/radius)*mag#

If vr>255 Then vr=255
If vg>255 Then vg=255
If vb>255 Then vb=255

vx#=VertexNX(surf,v)
vy#=VertexNY(surf,v)
vz#=VertexNZ(surf,v)

mag#=1/mag#
LnY#=yd#*mag#*-1
LnX#=xd#*mag#*-1
LnZ#=zd#*mag#*-1

Kh#=((vx)*LnX+(vy)*LnY+(vz)*LnZ)
If kh#>0
VertexColor surf,v,vr*Kh#+vcr,vg*Kh#+vcg,vb*Kh#+vcb
EndIf

Next
Next
End Function


Function ApplyAmbient(entity,r,g,b)

count=CountSurfaces(entity)
For n=1 To count
surf=GetSurface(entity,n)
Vcount=CountVertices(surf)-1
For v=0 To Vcount
VertexColor surf,v,r,g,b
Next
Next

End Function


ChrML(Posted 2003) [#2]
Hi, some not-english guy. Does that code work as a Blitz3D light?


Filax(Posted 2003) [#3]
Yes this is fake ligthing


jfk EO-11110(Posted 2003) [#4]
Hi Filax. I am afraid Arbitrage already tried to do this in Realtime, but wasn't successful. ("This function is meant for 1 time lighting not realtime ")


Filax(Posted 2003) [#5]
Ok for information :) thanks


Rob(Posted 2003) [#6]
hyperblitzer, have some respect for filax who is a long standing member of this community. Thanks.

Also, this board treats people from each country equally.