// Hi Bill,
//
// min_extent and max_extent will help centering text;
// this whole post is a demo scene -- render with
// -F +W512 +H384 +A0.1
//
// Replace "/2*x" by
//   "/2*<1,1,0>" to center along x and y
//   "/2"         to center along all axes
//   "*-1"        to right-justify
//   "*<1,.5,0>   to right-justify and center along y
//   etc. (and change the macro's name accordingly!)
//
//  Sputnik


// macros to center an object along the x-axis
// (more precisely: to center the bounding box of
// the object; this works well for text objects)

#macro Simple_center_along_x (Obj)
    object { Obj translate -(max_extent(Obj)-min_extent(Obj))/2*x }
    #end//macro Simple_center_along_x

#macro Center_along_x (Obj)
    object { Obj translate -(max_extent(Obj)-min_extent(Obj))/2*x
    // "}" omitted to allow modifiers without object{...}
    #end//macro Center_along_x


// a text object

#declare TextObject = text { ttf "timrom.ttf" "[---Text---]" 0.1, 0
    pigment { color rgb 1 }
    }


// put centered text into scene

Simple_center_along_x ( TextObject ) // that's all!

object { Simple_center_along_x ( TextObject )
    translate -z
    }

Center_along_x ( TextObject ) // {
    translate -2*z
    }


// origin, z-axis, x-z-plane, light and camera

union {
    sphere { 0, 0.1 }
    cylinder { -3*z, 3*z, 0.02 }
    cone { 3*z, 0.1, 3.5*z, 0 }
    pigment { color green 1 }
    finish { ambient .3 diffuse .7 }
    }

plane { y, 0
    pigment { checker rgbt <1, .7, 0, .4> rgbt <1, 1, 0, .4> }
    finish { ambient .3 diffuse .7 }
    }

light_source { <-1, 3, -2>*100, rgb 1 }

camera { location -4.5*z look_at 0 rotate <40, 20, 0> translate -z }


// END

Post a reply to this message