Sophie: blender-manual-2.49a-1ark i586

blender-manual-2.49a-1ark.i586.rpm

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
<HTML
><HEAD
><TITLE
>Panoramic renderings</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
"><LINK
REL="HOME"
TITLE="Blender Documentation Volume I - User Guide"
HREF="book1.html"><LINK
REL="UP"
TITLE="Rendering"
HREF="c7592.html"><LINK
REL="PREVIOUS"
TITLE="Rendering"
HREF="c7592.html"><LINK
REL="NEXT"
TITLE="Antialiasing"
HREF="x7735.html"></HEAD
><BODY
CLASS="section"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>Blender Documentation Volume I - User Guide: Last modified April 29 2004 S68</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="c7592.html"
ACCESSKEY="P"
>&#60;&#60;&#60; Previous</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
>Rendering</TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="bottom"
><A
HREF="x7735.html"
ACCESSKEY="N"
>Next &#62;&#62;&#62;</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="rendering_panorama"
></A
>Panoramic renderings</H1
><P
>&#13;To obtain nice panoramic renderings, up to a full 360 view
of the horizon, Blender provides an automatic procedure.
</P
><P
>&#13;    If the <TT
CLASS="literal"
>Xparts</TT
> is greater than 1 and the
    <TT
CLASS="literal"
>Pano</TT
> button of the <TT
CLASS="literal"
>Render</TT
> Panel
	is pressed (<A
HREF="x7671.html#BSG.REN.F.S68.201"
>Figure 5</A
>),
    then the rendered image is created to be <TT
CLASS="literal"
>Xparts</TT
> times
 	<TT
CLASS="literal"
>SizeX</TT
> wide
    and <TT
CLASS="literal"
>SizeY</TT
> high, rendering each part by rotating the camera
    as far as necessary to obtain seamless images.
</P
><DIV
CLASS="figure"
><A
NAME="BSG.REN.F.S68.201"
></A
><DIV
CLASS="mediaobject"
><P
><IMG
SRC="PartR/rendering/gfx/Render03.png"></P
></DIV
><P
><B
>Figure 5. Panorama button.</B
></P
></DIV
><P
>&#13;	<A
HREF="x7671.html#BSG.REN.F.S68.202"
>Figure 6</A
> shows a test set up
	with 12 spheres surrounding a camera. By leaving the camera
	as it is, you obtain the rendering shown in <A
HREF="x7671.html#BSG.REN.F.S68.203"
>Figure 7</A
>.
	By setting <TT
CLASS="literal"
>Xparts</TT
> to 3 and selecting <TT
CLASS="literal"
>Panorama</TT
> the result is 
	an image three times wider showing one more full camera shot
	to the right and one full to the left (<A
HREF="x7671.html#BSG.REN.F.S68.204"
>Figure 8</A
>).
</P
><DIV
CLASS="figure"
><A
NAME="BSG.REN.F.S68.202"
></A
><DIV
CLASS="mediaobject"
><P
><IMG
SRC="PartR/rendering/gfx/Panorama01.png"></P
></DIV
><P
><B
>Figure 6. Panorama test set up.</B
></P
></DIV
><P
>&#13;To obtain something similar without the Panorama option, the
only way is to decrease the camera focal length. For example
<A
HREF="x7671.html#BSG.REN.F.S68.205"
>Figure 9</A
> shows a comparable
view, obtained with a 7.0 focal length, equivalent
to a very wide angle, or fish-eye, lens. Distortion is very evident.
</P
><DIV
CLASS="figure"
><A
NAME="BSG.REN.F.S68.203"
></A
><DIV
CLASS="mediaobject"
><P
><IMG
SRC="PartR/rendering/gfx/Panorama02.png"></P
></DIV
><P
><B
>Figure 7. Non-panoramic rendering.</B
></P
></DIV
><DIV
CLASS="figure"
><A
NAME="BSG.REN.F.S68.204"
></A
><DIV
CLASS="mediaobject"
><P
><IMG
SRC="PartR/rendering/gfx/Panorama03.png"></P
></DIV
><P
><B
>Figure 8. Panoramic rendering.</B
></P
></DIV
><DIV
CLASS="figure"
><A
NAME="BSG.REN.F.S68.205"
></A
><DIV
CLASS="mediaobject"
><P
><IMG
SRC="PartR/rendering/gfx/Panorama04.png"></P
></DIV
><P
><B
>Figure 9. Fish-eye rendering.</B
></P
></DIV
><P
>&#13;To obtain a full 360 view some tweaking is necessary. It is known that a focal
length of 16.0 corresponds to a viewing angle of 90. Hence a  panoramic
render with 4 Xparts and a camera with a 16.0 lens yields a full 360 view,
as that shown in <A
HREF="x7671.html#BSG.REN.F.S68.206"
>Figure 10</A
>. This is grossly
distorted, since a 16.0 lens is a wide angle lens, and distorts at the edges.
</P
><DIV
CLASS="figure"
><A
NAME="BSG.REN.F.S68.206"
></A
><DIV
CLASS="mediaobject"
><P
><IMG
SRC="PartR/rendering/gfx/Panorama05.png"></P
></DIV
><P
><B
>Figure 10. Full 360 panorama with 16.0 lenses.</B
></P
></DIV
><P
>&#13;To have undistorted views the focal length should be around 35.0.
<A
HREF="x7671.html#BSG.REN.F.S68.207"
>Figure 11</A
> shows the result for a panorama
with 8 Xparts and a camera with a 38.5 lens, corresponding to a 45
viewing angle.
</P
><DIV
CLASS="figure"
><A
NAME="BSG.REN.F.S68.207"
></A
><DIV
CLASS="mediaobject"
><P
><IMG
SRC="PartR/rendering/gfx/Panorama06.png"></P
></DIV
><P
><B
>Figure 11. Full 360 panorama with 38.5 lenses.</B
></P
></DIV
><P
>&#13;The image is much less distorted, but special attention must be given to proportion.
The original image was 320x256 pixels. The panorama in <A
HREF="x7671.html#BSG.REN.F.S68.206"
>Figure 10</A
>
is 4 x 320 wide. To keep this new panorama the same width, the <TT
CLASS="literal"
>SizeX</TT
>
of the image must be set to 160 so that 8 x 160 = 4 x 320.
But the camera viewing angle width occurs for the largest
dimension, so that, if <TT
CLASS="literal"
>SizeX</TT
> is kept to 256 the image spans 45 vertically
but less than that horizontally, so that the final result is not
a 360 panorama unless <TT
CLASS="literal"
>SizeX</TT
> &#8805; <TT
CLASS="literal"
>SizeY</TT
> or you are willing to make some tests.
</P
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="c7592.html"
ACCESSKEY="P"
>&#60;&#60;&#60; Previous</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="book1.html"
ACCESSKEY="H"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="x7735.html"
ACCESSKEY="N"
>Next &#62;&#62;&#62;</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>Rendering</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="c7592.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>Antialiasing</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>