Wow, thanks Sputnik!
Yeah, I know it is awful POV code. Probably shouldn't
have shared it.

H


news:40d24a6d$1@news.povray.org...
> /*
>
> Hi Harold,
>
> you definitely should learn to use while loops,
> arrays and macros; I don't think your chart script
> is helpful for beginners.
>
> Your code is very edit-unfriendly -- just try to
> leave out the first three months and append three
> new months at the end. In your script extensive
> rearrangements would be required, in my version
> below only the data arrays need to be changed.
>
> Or assume you want other symbols for the blue
> graph: this would require changing 16 textures.
> In my code this is concentrated in a single place:
> the declaration of Box, used in the statement
> Sweep (CaliData, Box, Blue_Agate)
>
> Of course much more could be done: automatic
> adaption to the number of data points and the
> number of graphs, automatic determination of the
> range of the values and of nice min/max/stepsize
> for the y-axis, automatic fitting to the aspect
> ratio of the picture, ...
>
> This whole post is a POV-Ray scene file -- just
> render it at 800 by 600 with options
> // +SP4 +EP4 +GD +A0.3 +AM2 +R3 -FN
> to see an almost exact replica of your chart; then
> change the macros and have fun!
>
> I hope this didn't sound too rude, but as this was
> offered as help to a beginner, I had to react ...
>
>    Sputnik
>
>
> */
>
> //=========BEGIN POV===============================
> //--- POV Ray Line Chart Scene File --- 


>
> global_settings { assumed_gamma 2.2 }
> #include "colors.inc"
> #include "textures.inc"
> #include "shapes.inc"
>
>
> // ---------- Data -----------
>
> #declare ButteData = array [16] {
>   1.0337,
>   1.0155,
>   1.0074,
>   1.0398,
>   1.0196,
>   1.0115,
>   1.058 ,
>   1.058 ,
>   1.0721,
>   1.0742,
>   1.0984,
>   1.1065,
>   1.0863,
>   1.0519,
>   1.0438,
>   1.0641 }
>
> #declare CaliData = array [16] {
>   0.5581,
>   0.5568,
>   0.5586,
>   0.5595,
>   0.5585,
>   0.5549,
>   0.5537,
>   0.5540,
>   0.5534,
>   0.5576,
>   0.5531,
>   0.5503,
>   0.5519,
>   0.5493,
>   0.5518,
>   0.5499 }
>
> #declare Months = array [16] {
>   "Jul-01",
>   "Aug-01",
>   "Sep-01",
>   "Oct-01",
>   "Nov-01",
>   "Dec-01",
>   "Jan-02",
>   "Feb-02",
>   "Mar-02",
>   "Apr-02",
>   "May-02",
>   "Jun-02",
>   "Jul-02",
>   "Aug-02",
>   "Sep-02",
>   "Oct-02" }
>
> // ---------- macro to draw a data line and symbols -----------
>
> #macro Sweep (DataArray, Symbol, Tex)
>
>   union {
>
>     sphere_sweep {linear_spline 16,
>
>       #local Index = 0;
>       #while (Index<16)
>         <Index/10-.8, DataArray[Index], 0>, .01
>         #local Index = Index+1;
>       #end//while
>     }
>
>     #local Index = 0;
>     #while (Index<16)
>       object { Symbol translate <Index/10-.8, DataArray[Index], 0> }
>       #local Index = Index+1;
>     #end//while
>
>     texture {Tex}
>
>   }
>
> #end//macro Sweep
>
>
> // ---------- untextured symbols for data points -----------
>
> #declare Sphere = sphere { 0, 0.02 }
>
> #declare Box = box { -0.02, 0.02 rotate y*45 }
>
>
> // ---------- macro to draw vertical labels and lines -----------
>
> #macro LabelsAndLines (LabelTex, LineTex)
>
>   #local Index = 0;
>   #while (Index<=12)
>
>     text {ttf "times.ttf",str(Index/10,3,1), 0.5, 0
>       scale 0.05
>       texture {LabelTex}
>       translate <-0.9, Index/10, 0 >
>     }
>
>     sphere_sweep {linear_spline 2,
>       <-.81, Index/10, 0>, .002
>       < .71, Index/10, 0>, .002
>       texture {LineTex}
>     }
>
>     #local Index = Index+1;
>   #end//while
>
> #end//macro LabelsAndLines
>
>
> // ---------- macro to make centered text -----------
>
> #macro CenteredText (TTFFont, TextString, Thick)
>
>   #local Txt = text {ttf TTFFont, TextString, Thick, 0 }
>   #local Mid = max_extent(Txt)/2;
>
>   object { Txt translate -Mid*x }
>
> #end//macro CenteredText
>
>
> // ---------- macro to draw months and x-ticks -----------
>
> #macro MonthsAndTicks (MonthThick, MonthTex, TickTex)
>
>   #local Index = 0;
>   #while (Index<16)
>
>     object { CenteredText ("times.ttf", Months[Index], MonthThick)
>       scale 0.03
>       texture {MonthTex}
>       translate <Index/10-0.8, -0.05, 0>
>     }
>
>     cylinder { 0, 0.01*y, 0.002
>       texture {TickTex}
>       translate (Index/10-0.8)*x
>     }
>
>     #local Index = Index+1;
>   #end//while
>
> #end//macro LabelsAndLines
>
>
> // ---------- Lights, Camera, Action -----------
>
> //  Single camera
> #declare Camx=-0.1;
>
>  camera {location <Camx, 0.6, -3> look_at <Camx,0.6,0> angle 40}
>
>  light_source { < 10,10,-40> color rgb <1,1,1> }
>  light_source { <-30,20,-40> color rgb <0.75,0.75,0.75> }
>  light_source { <0.5,10,-12> color rgb <0.55,0.55,0.55> }
>
>
> background {Black}
>
> // Un-comment the following lines to check parameter values,
> //   put the name of the parameter after Str(
> //text {ttf  "crystal.ttf",  str(l1P1,8,4), 2, 0 translate <-1,1,-2>
> texture{White_Marble}}
> //text {ttf  "crystal.ttf",  str(l1P2,8,4), 2, 0 translate <-1,0,-2>
> texture{White_Marble}}
> //text {ttf  "crystal.ttf",  str(l1P3,8,4), 2, 0 translate <-1,-1,-2>
> texture{White_Marble}}
>
> //#declare VertScale =  0.03658 ;
>
>
> // draw it all (short, readable, editable, isn't it?)
>
> Sweep (ButteData, Sphere, PinkAlabaster)
> Sweep (CaliData, Box, Blue_Agate)
> LabelsAndLines (PinkAlabaster, Blue_Agate)
> MonthsAndTicks (0.5, PinkAlabaster, Blue_Agate)
>
>
> object { CenteredText ("times.ttf", "Out of Home Placements", 1)
>   scale 0.10
>   texture {pigment{color rgb <1.9,1.2,0.15>}}
>   translate <   0, 1.35, 0.2  >
>   rotate x*-1 // why this?!?
> }
>
> object { CenteredText ("times.ttf", "Butte County and California", 1)
>   scale 0.06
>   texture {pigment{color rgb <1.2,1.1,0.05>}}
>   translate <   0, 1.27, 0.23 >
>   rotate x*-1
> }
>
> text {
>   ttf "timesi.ttf",
>   "Source: California Department of Social Services, Research and
> Development Division",
>   1, 0
>   scale 0.025
>   texture {PinkAlabaster}
>   translate <-1.05, -0.1, 0>
> }
>
> object { CenteredText ("times.ttf", "", 2)
>   scale 0.20
>   texture {PinkAlabaster}
>   translate 2.2*x
>   rotate y*10
> }
>
> object { CenteredText ("times.ttf", "Percent of Youth Population", 1)
>   scale 0.045
>   texture {PinkAlabaster}
>   rotate <-8,0,90>
>   translate < -0.95, 0.6,  0   >
> }
>
> object { CenteredText ("times.ttf", "", 2)
>   scale 0.08
>   texture {PinkAlabaster}
>   translate <0,-1.47,-4.5 >
>   rotate x*5
> }
>
> // ========= That's all =================
>
>

Post a reply to this message

Sputnik,

On second thought, my dumb "brute force" POV code
might be good for a beginner if he or she is not a programmer.
Just as a starter, then he/she can learn good programming
technique.

Of course, the contrast of the two scripts can be very
enlightening :-) . I much appreciate your modifications,
they will help me improve my code.

h

Post a reply to this message

Shay,

Why orthographic rather than perspective? I note that the equivalent
render in a perspective camera would use an angle of 9.5. I guess
I've never understood the advantage of orthographic cameras, as
perspective seems to more closely approximate the human eye.

My take on using POV to graph in 3D is to use perspective,
since other graphics systems can give you a flat image.

H

"Shay" <rrr.rrr.r> wrote in message news:40d1dc33@news.povray.org...
>
> "1ternaut" <ded### [at] sparkwirecom> wrote in message
> news:40cfa078@news.povray.org...
>
> Look in povray.text.scene-files for an example scene with documentation
> references
>
>  -Shay
>
>

Post a reply to this message

Harold nous apporta ses lumieres ainsi en ce 18/06/2004 18:05... :

>Shay,
>
>Why orthographic rather than perspective?
>
When you don't want perspective, like if you want to simulate an 
extreeme focal lenght. Usefull for technical renders and for placing 
some elements.
It's all a mather of choices, preferences, situations and needs.

Alain

Post a reply to this message

Alain wrote:


> When you don't want perspective, like if you want to
> simulate an extreeme focal lenght. Usefull for
> technical renders and for placing  some elements.
> It's all a matter of choices, preferences,
> situations and needs. 

Yes, Harold, "placing some elements" was my consideration here. I wanted to
allow flexibility in camera placement without adding more complex (to a
beginner) code to ensure that the text labels were visible.

 -Shay

Post a reply to this message