Props to you.  I basically understand it.  I learn by taking source code of 
programs apart and trying various things.  So thanks again!  If you want to 
see my finished logo for proposal, I'll be happy to send it to you.  Now its 
off to combining the alphabet blocks (or my own) to this.  Should look 
prerty convincing.
"Bob Hughes" <omn### [at] charternet> wrote in message 
news:4212c756$1@news.povray.org...
> "Daniel" <new### [at] hotmailcom> wrote in message 
> news:42129027$1@news.povray.org...
>> Can some1 please make me a sample?  I'm very new at POV ray.
>
> Since you're new to this I sure hope you can figure out what I've done 
> here:
>
> // BEGIN HERE
> global_settings {
> assumed_gamma 1
> }
>
> camera {location -3*z up y right image_width/image_height*x look_at 0}
>
> light_source {<100,100,-100>,1}
>
> #declare ImagePart=
> texture {
>  pigment {
>   image_map {
>   png "alpha.png"
>  }
> }
> }
>
> #declare InvisiblePart=
> texture {
>  pigment {
>   rgbt 1
>  }
> }
>
> // thick-walled box
> intersection {
> height_field {
>  png "alpha.png"
>  water_level 0.005 // remove lowest/darkest part
>  // some adjustments to get into place
>  rotate -90*x
>  scale <1.001,1.001,2>
>  translate 0.5*z
> }
> difference {
>  box {
>   0,1 // outside
>  }
>  box {
>   0.1,0.9 // inside
>  }
> }
> texture {
>  gradient z
>  texture_map {
>   [0.1 ImagePart] // trying to match thickness surface...
>   [0.1 InvisiblePart] // ... so are transformations below
>  }
>  scale <1.02,1.02,2> // some adjustments to get into place...
>  translate <-0.01,-0.01,-0.01> // ... so that coverage is good
> }
> translate <-0.5,-0.5,-0.5> // center on world origin
> rotate <0,-45,0> // turn to show thickness better
> }
>
> // show where box is
> difference {
>  box {
>   0,1 // outside edges
>  }
>  box {
>   0.01,0.99 // cutaway sides
>    scale <1.1,1,1> translate -0.015*x
>  }
>  box {
>   0.01,0.99 // cutaway top/bottom
>    scale <1,1.1,1> translate -0.015*y
>  }
>  box {
>   0.01,0.99 // cutaway front/back
>    scale <1,1,1.1> translate -0.015*z
>  }
>  pigment {
>   color rgb 1
>  }
> translate <-0.5,-0.5,-0.5> // center on world origin
> rotate <0,-45,0> // turn to show thickness better
> }
> // END HERE
>
> No doubt this complicated to go through just for a simple thing such as 
> this but I'm not able to think of a better way. Obviously there's a whole 
> lot of juggling the positions around to fit it all together right, and I 
> suppose you'll be changing it to do what you want.
>
> Maybe this will help anyhow. You can always ask more questions.
>
> Bob Hughes
>
>

Post a reply to this message

BTW is there a way to interpolate in the alpha area to make it a solid 
object?
"Daniel" <new### [at] hotmailcom> wrote in message 
news:42136175$1@news.povray.org...
> Props to you.  I basically understand it.  I learn by taking source code 
> of programs apart and trying various things.  So thanks again!  If you 
> want to see my finished logo for proposal, I'll be happy to send it to 
> you.  Now its off to combining the alphabet blocks (or my own) to this. 
> Should look prerty convincing.
> "Bob Hughes" <omn### [at] charternet> wrote in message 
> news:4212c756$1@news.povray.org...
>> "Daniel" <new### [at] hotmailcom> wrote in message 
>> news:42129027$1@news.povray.org...
>>> Can some1 please make me a sample?  I'm very new at POV ray.
>>
>> Since you're new to this I sure hope you can figure out what I've done 
>> here:
>>
>> // BEGIN HERE
>> global_settings {
>> assumed_gamma 1
>> }
>>
>> camera {location -3*z up y right image_width/image_height*x look_at 0}
>>
>> light_source {<100,100,-100>,1}
>>
>> #declare ImagePart=
>> texture {
>>  pigment {
>>   image_map {
>>   png "alpha.png"
>>  }
>> }
>> }
>>
>> #declare InvisiblePart=
>> texture {
>>  pigment {
>>   rgbt 1
>>  }
>> }
>>
>> // thick-walled box
>> intersection {
>> height_field {
>>  png "alpha.png"
>>  water_level 0.005 // remove lowest/darkest part
>>  // some adjustments to get into place
>>  rotate -90*x
>>  scale <1.001,1.001,2>
>>  translate 0.5*z
>> }
>> difference {
>>  box {
>>   0,1 // outside
>>  }
>>  box {
>>   0.1,0.9 // inside
>>  }
>> }
>> texture {
>>  gradient z
>>  texture_map {
>>   [0.1 ImagePart] // trying to match thickness surface...
>>   [0.1 InvisiblePart] // ... so are transformations below
>>  }
>>  scale <1.02,1.02,2> // some adjustments to get into place...
>>  translate <-0.01,-0.01,-0.01> // ... so that coverage is good
>> }
>> translate <-0.5,-0.5,-0.5> // center on world origin
>> rotate <0,-45,0> // turn to show thickness better
>> }
>>
>> // show where box is
>> difference {
>>  box {
>>   0,1 // outside edges
>>  }
>>  box {
>>   0.01,0.99 // cutaway sides
>>    scale <1.1,1,1> translate -0.015*x
>>  }
>>  box {
>>   0.01,0.99 // cutaway top/bottom
>>    scale <1,1.1,1> translate -0.015*y
>>  }
>>  box {
>>   0.01,0.99 // cutaway front/back
>>    scale <1,1,1.1> translate -0.015*z
>>  }
>>  pigment {
>>   color rgb 1
>>  }
>> translate <-0.5,-0.5,-0.5> // center on world origin
>> rotate <0,-45,0> // turn to show thickness better
>> }
>> // END HERE
>>
>> No doubt this complicated to go through just for a simple thing such as 
>> this but I'm not able to think of a better way. Obviously there's a whole 
>> lot of juggling the positions around to fit it all together right, and I 
>> suppose you'll be changing it to do what you want.
>>
>> Maybe this will help anyhow. You can always ask more questions.
>>
>> Bob Hughes
>>
>>
>
>

Post a reply to this message

Okay. Good that you think it'll work for you. I thought afterward that I 
should maybe have said something about the "alpha.png" being used for both 
height_field and pigment, along the lines of: it might not do well to use 
the same exact image file because of the HF using a specific color=height 
thing. Probably not always going to work right. And water_level I gave it 
would drop any dark parts- including those that are in your logo/symbol. 
Best thing would be a cutout kind of image so whole thing is just black and 
white, that way you have a reasonably good edge for the graphic your trying 
to create the extrusion for.

Not always easy to convey every detail for a new POV-Ray user. Good to read 
the documentation for what you find in the scripts, in order to get the 
details figured out or move on to the next question.

Oh yeah, and thanks for the offer to see the result but no need to do that. 
Unless you want to post at povray.binaries.images, of course.

Bob Hughes

Post a reply to this message

Could I email you a pix of what i got so far.  There are some bugs that you 
may know how to fix.  Thanks!
"Bob Hughes" <omn### [at] charternet> wrote in message 
news:4213aaa2@news.povray.org...
> Okay. Good that you think it'll work for you. I thought afterward that I 
> should maybe have said something about the "alpha.png" being used for both 
> height_field and pigment, along the lines of: it might not do well to use 
> the same exact image file because of the HF using a specific color=height 
> thing. Probably not always going to work right. And water_level I gave it 
> would drop any dark parts- including those that are in your logo/symbol. 
> Best thing would be a cutout kind of image so whole thing is just black 
> and white, that way you have a reasonably good edge for the graphic your 
> trying to create the extrusion for.
>
> Not always easy to convey every detail for a new POV-Ray user. Good to 
> read the documentation for what you find in the scripts, in order to get 
> the details figured out or move on to the next question.
>
> Oh yeah, and thanks for the offer to see the result but no need to do 
> that. Unless you want to post at povray.binaries.images, of course.
>
> Bob Hughes
>
>

Post a reply to this message

It looks fuzzy if you know what I mean.  When I have the block set to 
intersection, and the block becomes fuzzy when it is white or on another 
Pigment.
"Daniel" <new### [at] hotmailcom> wrote in message 
news:4213b44b$1@news.povray.org...
> Could I email you a pix of what i got so far.  There are some bugs that 
> you may know how to fix.  Thanks!
> "Bob Hughes" <omn### [at] charternet> wrote in message 
> news:4213aaa2@news.povray.org...
>> Okay. Good that you think it'll work for you. I thought afterward that I 
>> should maybe have said something about the "alpha.png" being used for 
>> both height_field and pigment, along the lines of: it might not do well 
>> to use the same exact image file because of the HF using a specific 
>> color=height thing. Probably not always going to work right. And 
>> water_level I gave it would drop any dark parts- including those that are 
>> in your logo/symbol. Best thing would be a cutout kind of image so whole 
>> thing is just black and white, that way you have a reasonably good edge 
>> for the graphic your trying to create the extrusion for.
>>
>> Not always easy to convey every detail for a new POV-Ray user. Good to 
>> read the documentation for what you find in the scripts, in order to get 
>> the details figured out or move on to the next question.
>>
>> Oh yeah, and thanks for the offer to see the result but no need to do 
>> that. Unless you want to post at povray.binaries.images, of course.
>>
>> Bob Hughes
>>
>>
>
>

Post a reply to this message

"Daniel" <new### [at] hotmailcom> wrote in message 
news:4213a911$1@news.povray.org...
> BTW is there a way to interpolate in the alpha area to make it a solid 
> object?

Missed you asking this by only minutes, apparently.

I don't think I know what you're actually asking. If I understand you right 
all you're wanting to do is keep that face of the box intact instead of just 
leaving the logo image floating in midair. If so, the water_level amount I 
mentioned before will allow that to happen if you change it to 0 or no 
keyword and number at all, as long as the surrounding image color is only 
solid black. However, your original question seemed to indicate you wanted 
it as a cutout having nothing surrounding it, hence the alpha channel for 
transparency.

Sorry, I forgot about the way it also intersects with the thick-walled box 
object. You'd need to keep the HF from getting snipped off by rescaling it 
to be shallower and/or move it outward (-z*?) some. Or even making the box 
solid itself first by removing the differenced inner box.

Only other thing I can guess you might have meant is, if the edge of the HF 
image can be smoother than it is now. I can only suggest adding the keyword 
'smooth' into the HF (before or after water_level) or increase your logo 
image resolution.

Otherwise, please elaborate on the question, if you can.

Bob Hughes

Post a reply to this message

"Daniel" <new### [at] hotmailcom> wrote in message 
news:4213b44b$1@news.povray.org...
> Could I email you a pix of what i got so far.  There are some bugs that 
> you may know how to fix.  Thanks!

Sure thing. Could be the only way to ever know what is being described 
anyway.

Bob Hughes

Post a reply to this message