LinuxQuestions.org - [SOLVED] CLI : Is There A Script To Skew Image With A Curve

Now that I have had some time to play around with it, I have POVRay acting as I had hoped.
Here is the setup:

The .pov and .ini files are sort of hacked up from multiple sources.
For the layout and bulk of the .ini and .pov files :: http://www.mpa-garching.mpg.de/~msel...ay/povray.html
For the sphere texture :: http://www.f-lohmueller.de/pov_tut/tex/tex_876e.htm

Also the texture is applied to the outside of the sphere so for the image to be viewed from inside out and have the proper view you will have to transform the image as a horizontal mirror image.

Code:

# convert -flop InIMG.jpg OutIMG.jpg

MYPOVFILE.ini

Code:

Input_File_Name=MYPOVFILE.pov                        ; input file name(s)

;Library_Path=



+W400 +H400                                          ; resolution: W(idth) times H(ight)

Display=on



Quality=9                                            ; 0 .. 11 (best), default: 9

Bounding=on

;Bounding_Threshold=25

Light_Buffer=on                                      ; (requires bounding on)

Vista_Buffer=on                                      ; (requires bounding on)

Antialias=on

Sampling_Method=1                                    ; 1 or 2 (both adaptive, 2 recursive)

Antialias_Threshold=0.1                              ;

Antialias_Depth=6                                    ; 1 .. 9 (best), default: 6

Jitter=on                                            ;

Jitter_Amount=1.0                                    ; 0.0 .. 1.0 (best)

Field_Render=off



Output_to_File=on

Output_File_Type=N                                    ; N for PNG

Output_Alpha=off

Bits_per_Color=16                                    ; 8 .. 16 for PNG

;Output_File_Name=



;--------------------------------------------------------------------------------------------------



;Initial_Frame=0

;Final_Frame=36

;Initial_Clock=0

;Final_Clock=1

MYPOVFILE.pov

Code:

global_settings

{  ambient_light <1,1,1>

  assumed_gamma 1

}

camera

{ 

 location <-.3,0,0>  

//x,y,z

//x=.1+ rotate90cw move down; x=-.1- rotate90ccw move down

//y=.1+ move down; y=-.1- move down flip

//z=.1+ zoom ; z=-.1- zoomout

  up z

  right x                                  

  look_at <170,0,270>

//x move camera left to right

//y move camera up and down

//z  0,0,270 straight on view

}

light_source

{  <0,0,0>

  color rgb <1,1,1>

  media_interaction on

  media_attenuation on

  shadowless

}



//-------------------------------------------------------------------------------------------------

sphere{ <0,0,0>, 0.5

        texture{ pigment{ color rgb<1, 1,1>}

                finish { diffuse 0.9 phong 0.1}

              } // end of texture 1



        texture{ pigment{

                image_map{ gif "cmailoFLOP.gif"

                            map_type 0

                            once

                          }

                translate<-0.5,-0.5,0>

                scale<1,1,1>*0.35

                } // end pigment

              } // end of texture 2

  } // end of sphere  ------------------





//-------------------------------------------------------------------------------------------------

Simply move around the camera's location and look_at attributes and you can achieve any view angle of an image superimposed on a concave curved surface.
Keep the values small, ie .1, .3, else you may go outside the sphere.

Code:

# ls



# povray MYPOVFILE.ini

# ls

MYPOVFILE.png

To make the white background transparent...

Code:

# convert -transparent white MYPOVFILE.png MYTRANSPARFILE.png

Endless thanks to jschiwal for suggesting POVRay!