I was playing around with tiled characters for the purposes of making sprite
sheets.  I am finding that (with code I write) that the characters of the bottom
of the screen are always cut off when I use an orthographic projection.

Can anyone fix my code so that:

1) The red spheres stay exactly on edges of screen and green spheres in corner.
(I want 100% control of the field of view here).

2) The "fakeman" objects at the bottom are not cut off?

thanks.








camera {orthographic angle  90
        location < 0.00,200*pow(2,0.5),-200*pow(2,0.5)>
        look_at 0
        right x*image_width/image_height
      }

light_source{<-31110,50000,-40000> color rgb 1}
light_source{<12220,500,40000> color rgb 2 shadowless}

#declare fakeman=union{
        cylinder{0,80*y,8 pigment {blue 1} finish {ambient rgb 0.15}}
        sphere{0,16 translate 80*y pigment{rgb <1,0.5,0>}}}
#declare tiley=//box{<-45,-5,-45>,<45,10,45> pigment{rgb 0.9}}
        superellipsoid{<0.45,0.25> scale 45*<1,0.2,1>  pigment{rgb 0.9}}
#declare unity=union{
        object{fakeman}
        object{tiley}
        }
#declare nx=-4.5;
#while(nx<6)
        #declare nz=-2.5;
        #while (nz<6)
                object{unity translate <nx*100,0,nz*200>}
        #declare nz=nz+1;
        #end
#declare nx=nx+1;
#end

sphere{0,28 pigment{red 1}}
sphere{0,28 pigment{red 1} translate <-400,  0, 400>}
sphere{0,28 pigment{red 1} translate < 400,  0, 400>}
sphere{0,28 pigment{red 1} translate <-400,  0,-400>}
sphere{0,28 pigment{red 1} translate < 400,  0,-400>}
sphere{0,28 pigment{green 1} translate < 400,  0,-400*pow(2,0.5)>}
sphere{0,28 pigment{green 1} translate <-400,  0,-400*pow(2,0.5)>}
sphere{0,28 pigment{green 1} translate < 400,  0, 400*pow(2,0.5)>}
sphere{0,28 pigment{green 1} translate <-400,  0, 400*pow(2,0.5)>}

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Bah!  double distance and 53 angle fixed it.


:"-)

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On 12/12/2012 12:45 PM, gregjohn wrote:
> Bah!  double distance and 53 angle fixed it.
>
>
> :"-)
>
>
hey cool ... and LOL I've gotten a little comfort in seeing that I'm not 
the only one who answers my own posts ;-)

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In my own experience, the orthographic camera makes objects entirely disappear
when they are too close to camera, or when the camera angle zooms in to see
*slightly less* than the whole object.  What seems to be happening is the camera
doesn't work well when the view is 'inside' the borders of the object's bounding
shape.

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Sorry, I need to retract that, I'm mistaken. Just did some tests and the ortho
camera seems to work fine (given the caveats in the wiki docs.) Well, I *did*
have odd problems with it at one time, but I can't seem to reproduce them now.
Probably my own error in its use.

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On 12-12-2012 19:02, James Holsenback wrote:
  hey cool ... and LOL I've gotten a little comfort in seeing that I'm not
> the only one who answers my own posts ;-)

Been there, done that too ;-)

Thomas

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"gregjohn" <pte### [at] yahoocom> wrote:
> I was playing around with tiled characters for the purposes of making sprite
> sheets.  I am finding that (with code I write) that the characters of the bottom
> of the screen are always cut off when I use an orthographic projection.

I don't bother with angle when I use the orthographic camera.  I just use the up
and right vectors.

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