🚀 go-pugleaf

In article <1ispmoINNbh7@matt.ksu.ksu.edu> dudley@matt.ksu.ksu.edu (D U D L E Y) writes:
>sjm@miles.com (Scott Mark) writes:
>
>>I have been thinking about doing animations with POV, but it seems that
>>the texture I'm using (DMFWood4) shifts when I move my camera!
>
>From the documentation:
>
>#       When animating objects with solid textures, the textures
>#       must move with the object, i.e. apply the same rotate or
>#       translate functions to the texture as to the object itself.
>#       This is now done automatically if the transformations are
>#       placed _after_ the texture block. Example:

From the original posting:   (No offense intended, but read what I _wrote_!)

>I have been thinking about doing animations with POV, but it seems that
>the texture I'm using (DMFWood4) shifts when I move my camera!
                                                        ------


I am not moving objects, before or after applying textures.  For completeness
I am including the scene file below.  It is short.  It doesn't take long
to render with antialiasing turned off.

When I render the following scene, I get some nice variation to the rings
running diagonally from top-front-left of the box to bottom-front-right.

If I move the camera to <1 7 -10> to get a closer look, the variation
disappears!  Just nice smooth concentric rings.

I was under the impression that the textures were deterministic, unless
there was the optional floating point value right after the keyword.

-------------------------- cut here ---------------------------

#include "colors.inc"
#include "shapes.inc"
#include "textures.inc"

camera {
/*
	location	<1 7 -10>
*/
	location	<1 15 -10>
	direction	<0 0 1.5>
	up		<0 1 0>
	right		<1.33 0 0>
	look_at		< 0 4 -4>
}

object {
	light_source {
		<1 15 -10>
		color White
	}
}

object {
/*
	intersection {
		box { <-4 4 0> <4 10 5> translate <0 0 -4> }
		plane { <0 0 1> 0 rotate <0 45 0> }
		plane { <0 0 1> 0 rotate <0 -45 0> }
	} bounded_by {
		box { <-4 4 0> <4 10 5> translate <0 0 -4> }
*/
	box { < -4 -4 -4> < 4 4 4> 
	} texture {
		DMFWood4
	} color White
} 

/* one board's texture, fairly nice
		DMFWood4
		rotate < 94 0 0>
		translate <0 0 -4>
		rotate < 0 5 0>
		scale <4 1 1>
*/

-------------------------- cut here ---------------------------

Scott Mark
sjm@miles.com