Help with shadow volumes - GameCreators Forum

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Erick G

Retired Moderator

19

Years of Service

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Joined: 2nd Oct 2004

Location: Texas, USA

Posted: 31st Oct 2004 05:38

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Hi all, I battling to get shadow volumes working using

SET SHADOW SHADING ON

here is my code,

+ Code Snippet

sync on
autocam off

rem Turn off default light
hide light 0

make light 1
set point light 1,0,20,0
color light 1,rgb(0,0,255)
show light 1

rem Floor
make object cube 100,10
color object 100,rgb(255,255,255)
position object 100,0,-3,5
scale object 100,300,50,300


rem Shadow Caster
make object cube 101,5
position object 101,0,10,5

rem Light object
make object cube 102,1
position object 102,0,20,5

set normalization on
set shadow shading on 101

rem Position Variables
xpos#=0
zpos#=0

rem Camera
make camera 1000
position camera 1000,0,30,30
point camera 1000,0,0,0

do
   if leftkey()=1 then  xpos# = xpos# + .1
   if rightkey()=1 then xpos# = xpos# - .1
   if upkey()=1 then  zpos# = zpos# - .1
   if downkey()=1 then zpos# = zpos# + .1

   position object 102,xpos#,20,zpos#
   position light 1,xpos#,20,zpos#

   sync
loop

I dont know why this aint working. I have a radeon 9800 so it does support it.

Thanks in advance
Erick

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Chris K

20

Years of Service

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Joined: 7th Oct 2003

Location: Lake Hylia

Posted: 31st Oct 2004 06:23

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How isn't it working? What error are you getting?

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Erick G

Retired Moderator

19

Years of Service

User Offline

Joined: 2nd Oct 2004

Location: Texas, USA

Posted: 31st Oct 2004 06:26

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hi sorry,

there is just no shadow volume being rendered.

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Erick G

Retired Moderator

19

Years of Service

User Offline

Joined: 2nd Oct 2004

Location: Texas, USA

Posted: 31st Oct 2004 06:33

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hi

if the objects touch each other, then I get a shadow, however, it aint realtime

here is my updated code

any ideas ?

+ Code Snippet

sync on
autocam off

rem Turn off default light
hide light 0

make light 1
set point light 1,0,20,0
color light 1,rgb(0,0,255)
show light 1

rem Floor
make object cube 100,10
color object 100,rgb(255,255,255)
position object 100,0,-3,5
scale object 100,300,50,300


rem Shadow Caster
make object cube 101,5
position object 101,-3,-1,5

rem Light object
make object cube 102,1
position object 102,0,20,5

set normalization on
set shadow shading on 101

rem Position Variables
xpos#=0
zpos#=0

rem Camera
make camera 1000
position camera 1000,0,30,30
point camera 1000,0,0,0

do
   if leftkey()=1 then  xpos# = xpos# + .1
   if rightkey()=1 then xpos# = xpos# - .1
   if upkey()=1 then  zpos# = zpos# - .1
   if downkey()=1 then zpos# = zpos# + .1

   position object 102,xpos#,20,zpos#
   position light 1,xpos#,20,zpos#

   sync
loop

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Erick G

Retired Moderator

19

Years of Service

User Offline

Joined: 2nd Oct 2004

Location: Texas, USA

Posted: 1st Nov 2004 09:06

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Hi

I got it working for anyone interested

http://forum.thegamecreators.com/?m=forum_view&t=41985&b=6

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