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PD Collection CD 1
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!Model
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1992-01-27
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!Model © 1992 Pete Goodwin.
A scene designer for PVray, a ray tracer.
Please send comments, fault reports to:
Pete Goodwin
15 Essex St.,
Reading,
Berks.,
RG2 0EH
!Model will be shareware in it's final release. This
version is public domain, but to get the final version
(when it's ready) send £10 to the above address to become
a registered user.
!Model uses VOGLE (very ordinary graphics learning
environment) to display 3 dimensional objects in various
different types of view. VOGLE itself is public domain (I
can supply a copy if anyone sends me a disk with an SAE).
!Model can cope with: Spheres, Scalable spheres (i.e. you
can scale it in all three dimensions), Boxes, Cones,
Cylinders and Planes. I'll add more objects as time goes
on.
!Model doesn't attempt to deal with PVray richness of
objects; for instance 'intersection' or 'difference' isn't
catered for. You can't take a sphere and subtract a
cylinder from like you can in PVray (effectively drilling
a hole through the sphere).
Creating and editing objects
!Model relies on each object having a centre; all
operations are based around this. Selecting an object you
must be within 0.5 units of the centre.
In Create mode, clicking in the window drops a new object
at that point. You may use Adjust to set the scale or
rotation of the object.
In Select mode, clicking in the window selects an object.
Dragging will move an object.
Adjust drag will either scale or rotate the object
depending on the Adjust menu setting¹.
With a grid value objects will be locked with values on
that grid setting, i.e. a grid of 0.2 will have values of
0.2, 4.6 etc.
The main window menu:
Create (sets create mode of the object selected)
Plane
Currently planes can be created only from the
Front and Top view - these are planes in xz and xy
axes.
Simple Sphere
This is a sphere that can't be scaled in any
dimension; only all three together.
Scalable Sphere
This is a quadric sphere that can be scaled in any
dimension.
Box
This is a cube 2 units in all dimensions.
Cylinder
This is a vertical (y) cylinder 2 units high, 1
unit radius.
Cone
This is a cone with a 1 unit radius, whose point
is at the centre of the object.
(Triangle)
(Rectangle)
(Composite)
Select (sets select mode)
Texture
This displays the texture dialog box.
Material
This displays the material dialog box.
Copy
Copy the currently selected object.
Delete
Delete the currently selected object.
Light Source
Make the current object a light source.
Display
The current object is displayed if ticked; not
displayed (hidden) otherwise.
Adjust
Scale
Set adjust drags to change the scale.
Angle
Set adjust drags to change the rotation.
Frame
Animation support (TBI).
View
Perspective
A full perspective view of the scene as seen from
the observer looking at the lookat (observed)
point.
Front
Front orthogonal view.
Top
Top orthogonal view.
Bottom
Bottom orthogonal view.
Left
Left hand view.
Right
Right hand view.
Options
Scale
Set the scale of the image on the orthogonal
views; the perspective view is unaffected.
Grid
Lock objects to a grid.
Lock
The third dimension on scaling will be locked to
ensure scaling is symettrical.
The bar icon menu
Info
Details about this version of Model
Ray Trace
Set up details to launch a ray tracing task for the
current view.
Clear
Clear out current image.
Save Model
Save Model data file.
Save PVray
Save PVray source file.
Quit
Colour
Colour is like !Paint's colour selector, except there's
extra value: R, G, B and Alpha. Alpha is the amount of
transparency (see PVray documentation).
To the right of the sliders is a box containing the
current colour setting. PVray uses 24 bit colour, and
specifies the colour using floating point values 0.0 to
1.0.
Below the sliders are two paint pot pourers. They set the
start and end of the 8 boxes at the bottom. Click on smear
to get a range between to colours.
The five colour boxes set those colours, i.e. black, red,
green, blue and white.
Transparent sets transparent colour, i.e. see through.
Colour Maps
These are part of certain types of texture (see PVray
documentation).
Select the number of ranges (defaults to 4).
Each line below is a colour map entry. The number is the
start of the entry. Click on the boxes to the right to set
the start and finish colours of the line.
Smear will take the left lowest colour as a starting point
and select colours ranging to the highest rightmost
colour.
None will switch off the colourmap.
Known faults
¹ Rotation in the left and right view doesn't work
properly.