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Hello, I'm Alberto from Italy..
I would want to modify an height_field with a normal pattern (granite for
example..) and then generate a new 16 bit grayscale image (png or tga..) to
re-use in other height_field statement..
is possible to do this?
I have written this basic sample:
//------------------------------
#include "colors.inc"
global_settings {
hf_gray_16 on
}
camera {
orthographic
location <0.518756, 1.42622, 0.517175>
sky <0, 1, 0>
direction <0, 0, 1>
right <1, 0, 0>
up <0, 1, 0>
look_at <0.518487, 0.464293, 0.493562>
}
height_field {
png "HFtest01.png"
scale <1, 0.3, 1>
rotate <0, 0, 0>
translate y*0.0870551
texture {
normal { granite 0.4 }
pigment { color rgb <0.32549, 0.32549, 0.32549> }
finish { ambient 1 }
}
}
//--------------------------------------
....but render shows me nothing, please can someone help me?
Thanks, Alberto
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albe99 wrote:
> Hello, I'm Alberto from Italy..
> I would want to modify an height_field with a normal pattern (granite for
> example..) and then generate a new 16 bit grayscale image (png or tga..) to
> re-use in other height_field statement..
> is possible to do this?
>
> I have written this basic sample:
> //------------------------------
> #include "colors.inc"
>
> global_settings {
> hf_gray_16 on
> }
>
> camera {
> orthographic
> location <0.518756, 1.42622, 0.517175>
> sky <0, 1, 0>
> direction <0, 0, 1>
> right <1, 0, 0>
> up <0, 1, 0>
> look_at <0.518487, 0.464293, 0.493562>
> }
>
> height_field {
> png "HFtest01.png"
> scale <1, 0.3, 1>
> rotate <0, 0, 0>
> translate y*0.0870551
>
> texture {
> normal { granite 0.4 }
> pigment { color rgb <0.32549, 0.32549, 0.32549> }
> finish { ambient 1 }
> }
> }
> //--------------------------------------
> ....but render shows me nothing, please can someone help me?
>
> Thanks, Alberto
>
>
>
>
>
It is because the use of pure ambient light does not show the relief of
either the hf or the normal
You need a light_source and start with the default finish. You can
then adjust the light_source, its angle to the hf and the finish diffuse
and specular parameters to get what you want ambient should be low or zero
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From: Christian Froeschlin
Subject: Re: height_field + normal pattern problem..
Date: 1 Apr 2007 20:19:42
Message: <46104c1e$1@news.povray.org>
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Jim Charter wrote:
> You need a light_source and start with the default finish. You can
> then adjust the light_source, its angle to the hf and the finish diffuse
> and specular parameters to get what you want ambient should be low or zero
Even so, the resulting image is probably not suitable for reusing it
as a heightfield in the sense the OP expected, because the darkest areas
are no longer of the lowest height.
So, assuming the original question is about adding detail structure
to a heightfield image, the image should probably not be rendered as
a heightfield at all, but simply a plane with an image_map + normal
pattern (or possibly an image_map layered with a function pigment).
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albe99 nous apporta ses lumieres en ce 01-04-2007 19:16:
> Hello, I'm Alberto from Italy..
> I would want to modify an height_field with a normal pattern (granite for
> example..) and then generate a new 16 bit grayscale image (png or tga..) to
> re-use in other height_field statement..
> is possible to do this?
> I have written this basic sample:
> //------------------------------
> #include "colors.inc"
> global_settings {
> hf_gray_16 on
> }
> camera {
> orthographic
> location <0.518756, 1.42622, 0.517175>
> sky <0, 1, 0>
> direction <0, 0, 1>
> right <1, 0, 0>
> up <0, 1, 0>
> look_at <0.518487, 0.464293, 0.493562>
> }
> height_field {
> png "HFtest01.png"
> scale <1, 0.3, 1>
> rotate <-90, 0, 0>
You look parallel to the Z axis, and the height_field extend along the X-Z plane
the height been along the Y axis. The rotation is to make it perpendicular to
the camera.
> translate y*0.0870551
> texture {
> normal { granite 0.4 }
> // pigment { color rgb <0.32549, 0.32549, 0.32549> }
Change to:
pigment{gradient z color_map{[0 rgb 1][1 rgb 0]}
> finish { ambient 1 }
> }
> }
> //--------------------------------------
> ....but render shows me nothing, please can someone help me?
> Thanks, Alberto
Also, for the normal to show up, you need a light_source. Without a light, you
can use the average function:
pigment{
average{
pigment_map{ [1 pigment{granite 0.4}]
[1 pigment{gradient z color_map{[0 rgb 1][1 rgb 0]}
}
}
}
--
Alain
-------------------------------------------------
Politicians are like diapers, they should be changed often and for the same reason.
Bob Monkhouse
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Thank you very much..
but I'm in trouble again..
So, I've changed the scene:
//------------------------------
#include "colors.inc"
#include "functions.inc"
global_settings {
hf_gray_16 on
}
//camera & height_field parallels to the Z axis
camera {
location <0, 0, -10>
look_at 0
}
height_field {
png "HFtest01.png"
scale <10, 3, 10>
rotate <-90, 0, 0>
translate y*0.0870551
texture {
normal { granite 0.4 }
pigment{
average{
pigment_map { [1 pigment{granite 0.4}]
[1 pigment{gradient z color_map{[0 rgb 1][1 rgb 0]}
}
}
}
finish { ambient 1 }
}
}
//------------------------------------------------
povray stop with this message error:
"Line: 40
File Context (5 lines):
pigment{
average{
normal_map { [1 pigment{granite 0.4}]
[1 pigment{gradient z color_map{[0 rgb 1][1 rgb 0]}
}
Parse Error: Average must have map."
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albe99 nous apporta ses lumieres en ce 02-04-2007 02:58:
> Thank you very much..
> but I'm in trouble again..
> So, I've changed the scene:
> //------------------------------
> #include "colors.inc"
> #include "functions.inc"
> global_settings {
> hf_gray_16 on
> }
> //camera & height_field parallels to the Z axis
> camera {
> location <0, 0, -10>
> look_at 0
> }
> height_field {
> png "HFtest01.png"
> scale <10, 3, 10>
> rotate <-90, 0, 0>
> translate y*0.0870551
> texture {
> normal { granite 0.4 }
> pigment{
> average{
> pigment_map { [1 pigment{granite 0.4}]
> [1 pigment{gradient z color_map{[0 rgb 1][1 rgb 0]}
> }
> }
> }
> finish { ambient 1 }
> }
> }
> //------------------------------------------------
> povray stop with this message error:
> "Line: 40
> File Context (5 lines):
> pigment{
> average{
> normal_map { [1 pigment{granite 0.4}]
> [1 pigment{gradient z color_map{[0 rgb 1][1 rgb 0]}
> }
> Parse Error: Average must have map."
My mistake, wrong kind of map. Change to:
pigment{average{
pigment_map{[1 pigment{granite 0.4}]
[1 pigment{gradient z color_map{[0 rgb 1][1 rgb 0]}
}
--
Alain
-------------------------------------------------
Fix reason firmly in her seat, and call to her tribunal every fact, every
opinion. Question with boldness even the existence of a God; because, if
there be one, he must more approve of the homage of reason, than that of
blindfolded fear.
Thomas Jefferson
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Alain <ele### [at] netscape net> wrote:
>
> My mistake, wrong kind of map. Change to:
> pigment{average{
> pigment_map{[1 pigment{granite 0.4}]
> [1 pigment{gradient z color_map{[0 rgb 1][1 rgb 0]}
> }
>
> --
> Alain
> -------------------------------------------------
thank you so much Alain..
but unfortunately, the Average function generates errors again..
"Line: 30
Parse Warning: Pigment type unspecified or not 1st item.
Line: 30
File Context (5 lines):
pigment_map {
[1 pigment
Parse Error: Expected ']', pigment found instead "
however, using a light_source, it seems to work quite well:
//---------------------------------------------------
global_settings {
hf_gray_16 on
}
light_source {
<0.516914, 0.509426, -1.47921>, rgb <1, 1, 1>
}
camera {
orthographic
location <0.51681, 0.50948, -1.40625>
sky <0, 1, 0>
direction <0, 0, 1>
right <1, 0, 0>
up <0, 1, 0>
look_at <0.51854, 0.50676, -0.43528>
}
height_field {
png "prova2.png"
scale <1, 0.4, 1>
rotate x*-90
translate x*0.0153893
texture {
normal { granite 0.4 }
pigment {
gradient z
color_map {
[0 rgb 1]
[1 rgb 0]
}
}
finish { ambient .5 }
}
}
//------------------------------------------
the render produces a good image reusable in an height_field statement..
Alberto.
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