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ridwan sameer DeleD PRO user
Joined: 27 Jun 2008 Posts: 108
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Posted: Wed Oct 08, 2008 7:30 pm Post subject: As i get into an object, it diappears |
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hey guys
i just created a cave like structure
Now i delete the face of the first thing, so that playersare able to enter the cave, and then i continued to extrude, ut now i want to delete the faces that are there after i extrude
so for this i have to get into the cave with the deled viewer, but as i get in, the whole thing disappears, i cantsee whats in front, behind or on the sides, only the grids are appearing
Please tell me what is wrong |
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fik Member
Joined: 11 Oct 2006 Posts: 303
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Posted: Wed Oct 08, 2008 7:52 pm Post subject: |
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Sounds like you have backface culling on press f5 or double click cull on bottom bar. |
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Jeroen Site Admin
Joined: 07 Aug 2004 Posts: 5332 Location: The Netherlands
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Posted: Wed Oct 08, 2008 8:24 pm Post subject: |
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Yes, Fik is right. Culling is on. _________________ Check out Figuro, our online 3D app! More powerful 3D tools for free. |
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ridwan sameer DeleD PRO user
Joined: 27 Jun 2008 Posts: 108
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Posted: Thu Oct 09, 2008 2:35 am Post subject: |
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thanks alot you guys
That wassoe really good help
But if someone ay, can you eplain to me what this "CULL" exactly means, what people use it for etc..?
Thank you alot |
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Daaark DeleD PRO user
Joined: 01 Sep 2004 Posts: 2696 Location: Ottawa, Canada
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Posted: Thu Oct 09, 2008 2:57 am Post subject: |
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When you make a polygon. It has 1 side. It faces a certain direction. So if you make a cube, you have all the sides of the cube facing outward from the center of the cube.
If you move inside the cube the cube will appear to disappear, because all the polygons are facing the opposite direction.
CULLING is something the renderer does. It discards all the polygons that are facing away from the camera and does not draw them. This is for speed reasons. Why draw what you can't see?
You can disable culling, and still draw these backfaces, but there is nothing really there. It's just an illusion.
In short, if you want an inside to your cave, build the inside of your cave. _________________
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ridwan sameer DeleD PRO user
Joined: 27 Jun 2008 Posts: 108
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Posted: Thu Oct 09, 2008 3:11 am Post subject: |
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So when i press cull, i can see the inide, but if i put it in my game myplayers wont be able to see it?, that sucks?
And how would i build an inside of the cave? |
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Daaark DeleD PRO user
Joined: 01 Sep 2004 Posts: 2696 Location: Ottawa, Canada
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Posted: Thu Oct 09, 2008 4:17 am Post subject: |
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ridwan sameer wrote: |
So when i press cull, i can see the inide, but if i put it in my game myplayers wont be able to see it?, that sucks? |
That's how 3d works.
There is no inside until you build it.
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And how would i build an inside of the cave? |
The same way you built the outside. Why don't you post what you have so far in the 3d modeling forum, and let us help you from there. _________________
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ridwan sameer DeleD PRO user
Joined: 27 Jun 2008 Posts: 108
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Posted: Thu Oct 09, 2008 4:21 am Post subject: |
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OK thanks
but wait one sec, if i build it the sae way i built the outside, wont it just be the sae, that inside, wont have an inside, just like the outside this is confusing |
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Daaark DeleD PRO user
Joined: 01 Sep 2004 Posts: 2696 Location: Ottawa, Canada
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Posted: Thu Oct 09, 2008 4:33 am Post subject: |
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ridwan sameer wrote: |
OK thanks
but wait one sec, if i build it the sae way i built the outside, wont it just be the sae, that inside, wont have an inside, just like the outside this is confusing |
No, because the polygons on the inside will be facing inwards. _________________
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ridwan sameer DeleD PRO user
Joined: 27 Jun 2008 Posts: 108
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Posted: Thu Oct 09, 2008 5:29 am Post subject: |
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So if i put a Box, inside the original box, that could be my inside?
how does deled recognise it as the inside of something??
Also daark thanks alot till now, hope you can continue helping e |
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Daaark DeleD PRO user
Joined: 01 Sep 2004 Posts: 2696 Location: Ottawa, Canada
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Posted: Thu Oct 09, 2008 5:45 am Post subject: |
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No, you have to flip the 'normals' of the cube faces to make them face inside.
Try this.
Make a big cube.
Turn on culling. (double click the CULL thing at the bottom to make sure it's bold).
Select your cube and go into polygon mode (p).
Select the FLIP command on the sidebar.
Now in the bottom you will see some options. Check off the one that says POLYGONS IN SELECTED OBJECTS. That means it will flip all the polygons in the cube that you have selected.
Click OK.
Now watch your cube. All the polygons are facing inwards. _________________
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ridwan sameer DeleD PRO user
Joined: 27 Jun 2008 Posts: 108
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Posted: Thu Oct 09, 2008 8:48 am Post subject: |
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OK thanks, ill try it later
So what i should do is, create one cube, with the faces turning outside, for making the outside look like a cave, and then make a cube, inside this original cube, and flip it using the method you gave above, so totally i would be having one cube inside another, with the outer one facing the outside, and the inner one facing the inside
Please tell me if im correct
and do all modelers do this? |
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Daaark DeleD PRO user
Joined: 01 Sep 2004 Posts: 2696 Location: Ottawa, Canada
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Posted: Thu Oct 09, 2008 8:50 am Post subject: |
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Is you just inset a face on the outside of your cave and extrude inwards, you'll be fine, as those new faces will already be facing in. It's hard to help more without seeing your work.
Make a thread in the 3D Modeling section, and post screenshots. _________________
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Paul-Jan Site Admin
Joined: 08 Aug 2004 Posts: 3066 Location: Lage Zwaluwe
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Posted: Thu Oct 09, 2008 10:11 am Post subject: |
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Quote: |
and do all modelers do this? |
No, they only do it if you actually want to be able to see both outside AND inside, in a lot of situations only one side of the geometry is needed.
I strongly endorse Daarks advise to create a thread in the 3D Modeling section, so the friendly modelers on these boards can give you specific advise for the model and hand, thus helping you build and expand your modeling skills.... that's what the community is for! |
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ridwan sameer DeleD PRO user
Joined: 27 Jun 2008 Posts: 108
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Posted: Thu Oct 09, 2008 10:26 am Post subject: |
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Thanks alot daaark
I did it the inset way, wonder why i never thought of that maybe because aint a tech support guru
SO now my major problem is finished
Im working on this model to be something to bring up my 3d knowledge and deleD knowledge, it might not be used in my game
Im going to make it one huge zone, and add all kinds of props in it, that's my goal
And once i get things decently done, ill start posting them up in a thread, as you guys wanted me to, i need to do some texture work and prop work first though |
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