Site Map Object identification
For my
site map, here and in later portions of my report, I've standardized the tree, object,
and camera identifications as follows:
Object List
T - C1 First close tree subject walks behind
T - C2
Second close tree subject walks behind
T - C3 Tree with distinctive black shadow on trunk lower right side
T - C4
The Fork Tree which splits into two trunk sections like a tuning fork.
T - C5 The Leaning Tree going upward left on a diagonal
direction.
T - N1 The Big Tree on the Northward Perimeter.
T - N2 The thin tree to the left of the Big
Tree.
T - N3 The thin tree to the right of the Big Tree.
T - N4 The narrow and tilting tree trunk with no apparent
branches
Main Log The near horizontal large log in the foreground
Obj 1 A marker on the Main Log where
bark peels upward and has a whitish coloration
Obj 2 A short branch stump on a fallen log, behind the Main Log
Obj 3
A tree stump
Obj 4 Another tree stump
Obj 5 Another tree stump
Obj. 1 and Obj. 2 Illustrated
HERE for reference
A
note on the coding:
The "T" denotes "tree", the "C" denotes the center group of trees, and the "N" denotes the north back
wall of trees. "Obj is the abbreviation for "object"
Object Types:
I used symmetrical lattices (displacement mapping) for
the five center trees in my site model, because Bryce has excellent capabilities in this respect. The North section trees are simple
cylinder primitives, but later I will upgrade to polygon modeled shapes for my final site model. These cylinders suffice for camera
position analysis. The main log is a simple cylinder, as are the tree stumps. Obj #1 and #2 are simple spheres as markers. Replicating
these in another 3D visualization software should be easy, with the option of using an Image Plane object in place of the mesh trees,
if your application does not easily create displacement mapped meshes.
Mapping the Main Log - The main log is a simple cylinder.
The mapping of the enclosed texture should be cylindrical, with one complete map around the cylinder circumference. The image of the
log was repeated three times in this map, so each repeat will map about 120 degrees of the circumference. There is a small red dot
on the map which corresponds to the position of "Obj 1" the marker for the whitish bark on the log. Bryce creates all cylinders
with the cylinder length on the "Y" axis (Up/down) so once it has been created and sized for proportion, it will be rotated over 90
degrees to it's position. The mapping of the texture is done in its original vertical position.
The above link will give you the actual Site Model Data Sheet which contains all the
coordinate information on all site model objects ( dimension, position, and rotation) as well as the coordinates (position and rotation)
for all seven camera positions, so you may test this model in a 3D visualization software application. This document will be considered
my proof that the model and the camera positions and lens specification (a 15mm lens) are correct.
Please Note that there are
two versions of this chart, because my 3D application has used objects called symmetrical lattices as the five center trees, while
many other 3D applications will use simple image planes for those trees. Bryce loads the symmetrical lattice into the workspace laying
flat (one mesh up, its mirror mesh down). So when it is used to make a tree, I must rotate the object -90 degrees to turn it upright.
If you use an image plane created already in an X & Y orientation, upright, then that -90 degree rotation is not necessary. So
in the second form (Noted "For X, Y Image Plane Trees") the rotation on C1 to C5 are 90 degrees different from my Bryce coordinates.
I invite other researchers to test or check my data independently. If you
feel that another solution of object arrangements and/or camera positions and/or lens angles will produce a result as well, or better,
and thus re-butt my contention that this is the correct solution, please use the following blank form to note your data for object
and camera coordinates and either post in a forum or e-mail to me, and I will be pleased to test the data you provide, and publish
the results to compare with my results herein.