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I want to convert my paint macro to paint a whole scene instead of just a
single-colour object.
My idea is to first render the whole scene with ambient_light 1 to use
obtain colours with eval_pigment().
The image is then mapped onto a plane that is placed in such a way that it
would render exactly the same scene.
Up to this point everything works fine.
But when it comes to calculating the position for eval_pigment on the
plane, my math is not working out.
Here is a sample of the plane and the camera that match:
#declare CamColours=plane {z,CamDirect.z
texture {
pigment {
image_map { png "ArtistsMap.png"
once }
translate -0.5*(x+y)
scale
<image_width/image_height,1,1>*2
}
finish { ambient 1 diffuse 1}
}
translate CamDirect
Reorient_Trans(z, (CamLook-CamPos))
translate CamPos
}
camera {
location CamPos
direction CamDirect
right x*image_width/image_height
look_at CamLook
}
And here is my scan position that doesn't work.
ColPosX and ColPosY are x and y counters for scanning throught the x and y
positions of the image:
#local ScanPos=( ((<-.5,-.5,0>+<ColPosX,ColPosY,0>)
*<image_width/image_height,1,1>*2+CamDirect)*(CamLook-CamPos))+CamPos;
--
-Nekar Xenos-
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