Second Life Forums Archive - texture puzzle from a building thread

Malachi Petunia

Gentle Miscreant

Join date: 21 Sep 2003

Posts: 3,414

01-15-2007 16:25

From: Me

A poster above used the example of a textured soccer ball. I did some fooling around in phsop to try and make such a texture but ran into the "orange peel" problem. That is, a soccer ball exterior is composed of regular, tiled pentagons which works fine on a sphere but doesn't tile on a pshop plane. Yes, I know that there would be problems with the texture mapping onto a sphere but just can't even begin to figure where to start.

This is just a curiosity as I have no intention of making one, but I thought the texperts here might have some insight.

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Lee Ponzu

What Would Steve Do?

Join date: 28 Jun 2006

Posts: 1,770

01-15-2007 17:10

Well, it was my soccer ball example...

Obviously, SL uses some function that takes each point of a 2D texture and maps it to the surface of a sphere. We need the opposite. Given two circles representing the front and back of a sphere, map them to a rectangle.

It's just math

I am not a texture expert, but I am guessing there are plugins that do this, or even that PSP already has a command for it.

Malachi Petunia

Gentle Miscreant

Join date: 21 Sep 2003

Posts: 3,414

soccer balls are not pentagons!

01-15-2007 17:14

In the other thread someone pointed out that soccer (football) balls were pentagons and hexagons.

From: Malachi Petunia

Thanks for the tip; shows you how many times I've seen a soccer ball

The problem is geometry - or tessellations. You can tile a plane with squares, rectangles, triangles or heaxagons. I know you can't with pentagons and am unsure about pentagons and hexagons.

The reason I called it the "orange peel" problem is that you cannot lay an orange peel flat on a table, nor can you take the skin off a globe and lay it flat

_____________________

Renee Roundfield

Registered User

Join date: 10 Mar 2006

Posts: 278

excellent soccer texture

01-17-2007 02:01

and an explanation about how it was done
http://forums.creativecow.net/cgi-bin/new_right_read_post_frame.cgi?forumid=2&univpostid=887834&postid=887838

texture puzzle from a building thread
Malachi Petunia Gentle Miscreant Join date: 21 Sep 2003 Posts: 3,414	01-15-2007 16:25 Elsewhere I wrote: From: Me A poster above used the example of a textured soccer ball. I did some fooling around in phsop to try and make such a texture but ran into the "orange peel" problem. That is, a soccer ball exterior is composed of regular, tiled pentagons which works fine on a sphere but doesn't tile on a pshop plane. Yes, I know that there would be problems with the texture mapping onto a sphere but just can't even begin to figure where to start. This is just a curiosity as I have no intention of making one, but I thought the texperts here might have some insight. _____________________
Lee Ponzu What Would Steve Do? Join date: 28 Jun 2006 Posts: 1,770	01-15-2007 17:10 Well, it was my soccer ball example... Obviously, SL uses some function that takes each point of a 2D texture and maps it to the surface of a sphere. We need the opposite. Given two circles representing the front and back of a sphere, map them to a rectangle. It's just math I am not a texture expert, but I am guessing there are plugins that do this, or even that PSP already has a command for it.
Malachi Petunia Gentle Miscreant Join date: 21 Sep 2003 Posts: 3,414	soccer balls are not pentagons! 01-15-2007 17:14 In the other thread someone pointed out that soccer (football) balls were pentagons and hexagons. From: Malachi Petunia Thanks for the tip; shows you how many times I've seen a soccer ball The problem is geometry - or tessellations. You can tile a plane with squares, rectangles, triangles or heaxagons. I know you can't with pentagons and am unsure about pentagons and hexagons. The reason I called it the "orange peel" problem is that you cannot lay an orange peel flat on a table, nor can you take the skin off a globe and lay it flat _____________________
Renee Roundfield Registered User Join date: 10 Mar 2006 Posts: 278	excellent soccer texture 01-17-2007 02:01 and an explanation about how it was done http://forums.creativecow.net/cgi-bin/new_right_read_post_frame.cgi?forumid=2&univpostid=887834&postid=887838

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texture puzzle from a building thread