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I know of a procedurally done star at Mike Hough's Povray tutorial web pages:
http://members.xoom.com/POVRAY3/procedural.html
Might be more of a trick getting it onto that flag though.
Bob
"Jerry" <jer### [at] acusd edu> wrote in message
news:jerry-CACFC0.08395103032000@news.povray.org...
| In article <38BEF26E.50E0120C@exaweb.de>, Peter Santo <gwe### [at] exaweb de>
| wrote:
| >Why did I create such a scene file? I needed a picture of a
| >British Flag in very high resolution and with absolutely
| >correct geometry. Additionally, I wanted to experiment
| >with layered pigments.
|
| I did the same thing, for similar reasons, with the United States flag
| and one of the Confederate flags. I couldn't figure out how to make the
| stars procedural, however. Anyone have any ideas on how to make these
| flags fully procedural?
|
| // Persistence of Vision Ray Tracer Scene Description File
| // Author: Jerry Stratton (jer### [at] acusd edu)
| #include "colors.inc"
| #include "textures.inc"
| #declare flag_red = color rgb <.8,0,0>;
| #declare flag_white = color rgb <.8,.8,.8>;
| #declare flag_blue = color rgb <0,0,.8>;
|
| #declare flag_normal = normal {
| wrinkles 2
| scale .05
| turbulence .25
| }
|
| #declare flag_dirt = texture {
| pigment {
| bozo
| turbulence .2
| color_map {
| [0.0 color Gray50 filter .5]
| [0.5 color White transmit 1]
| [1.0 color White transmit 1]
| }
| }
| scale .1
| }
|
| #declare conf_bar = texture {
| pigment {
| gradient x
| frequency 1
| color_map {
| [0.0 color flag_white]
| [0.08 color flag_white]
| [0.09 color White transmit 1]
| [1.0 color White transmit 1]
| }
| }
| finish {
| ambient .5
| }
| }
| #declare conf_blue = pigment {
| gradient x
| frequency 1
| color_map {
| [0.0 color flag_blue]
| [0.06 color flag_blue]
| [0.06 color White transmit 2]
| [1.0 color White transmit 2]
| }
| }
| #declare conf_stars = pigment {
| image_map {
| gif "constar.gif"
| }
| translate <-.5,0,0>
| scale <1,330/230,1>
| scale .1
| translate <0,-.2,0>
| }
| #declare conf_blue_bar = texture {
| pigment {
| average
| pigment_map {
| [1 conf_blue]
| [1 conf_stars]
| }
| }
| finish {
| ambient .5
| }
| }
|
| #declare bar_rotate = 45*sqrt(2);
|
| #declare confederate_texture = texture {
| pigment { color flag_red }
| normal {
| flag_normal
| }
| finish {
| ambient .4
| }
| }
| texture { conf_bar
| rotate <0,0,bar_rotate>
| normal { flag_normal}
| }
| texture { conf_bar
| rotate <0,0,-bar_rotate>
| normal { flag_normal }
| }
| texture { conf_blue_bar
| rotate <0,0,bar_rotate>
| normal { flag_normal }
| }
| texture { conf_blue_bar
| rotate <0,0,-bar_rotate>
| normal { flag_normal }
| }
| texture { flag_dirt }
|
|
|
| #declare blue_box = pigment {
| boxed
| color_map {
| [0.0 color White transmit 2]
| [0.1 color White transmit 2]
| [0.2 color Blue]
| [1.0 color Blue]
| }
| }
| #declare white_stars = pigment {
| image_map {
| gif "fedstar.gif"
| }
| scale .3
| }
|
| #declare federal_texture = texture {
| pigment {
| gradient y
| frequency 13
| color_map {
| [0.0 color flag_red]
| [0.41 color flag_red]
| [0.42 color Black]
| [0.50 color Black]
| [0.51 color flag_white]
| [0.90 color flag_white]
| [0.91 color Black]
| [0.99 color Black]
| [1.0 color flag_red]
| }
| translate <0,-.48,0>
| }
| finish {
| ambient .4
| }
| }
| texture {
| pigment {
| average
| pigment_map {
| [1 blue_box]
| [1 white_stars]
| }
| scale .3
| scale <7/13,7/13,1>
| translate <-4/13*2/.75,5/13,0>*.3
| }
| finish {
| ambient .4
| }
| }
| texture { flag_dirt }
|
|
| #declare conf_flag_pigment = texture {
| confederate_texture
| translate <.45,.25,0>
| scale 2
| scale <.825,1,1>
| }
|
|
| #declare fed_flag_pigment = texture {
| federal_texture
| translate <.383, .25,0>
| scale 2
| scale <.825, 1, 1>
| }
|
| file://Make some flags
| camera {
| perspective
| location <0.0, 0.0, -2.5>
| look_at <0.0, 0.0, 0.0>
| }
| light_source {
| <0.0, 100, -100>
| rgb <1.000000, 1.000000, 1.000000>
| }
| background {
| rgb < 0, 1, 1>
| }
|
| box {
| <0,0,0>,<1,1,.1>
| texture {
| fed_flag_pigment
| }
| scale <1.5,1,1>
| rotate <0,0,33>
| translate <-.5,-.5.0>
| translate <-.6,0,0>
| }
| box {
| <0,0,0>,<1.5,1,.1>
| texture {
| conf_flag_pigment
| }
| rotate <0,0,33>
| translate <-.5,-.5.0>
| translate <1,0,.3>
| }
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