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1992-02-06
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VOLUME.PRG created by XAVIER LAMBRECHT
67, VOIE DE L'ARDENNE
4053 EMBOURG
BELGIUM
To run VOLUME, you need VOLUME.PRG and ANIME.PRG (no more)
On the disk, there are many examples of what you can do with VOLUME.
This program only work in low res.
1.INTRODUCTION
--------------
VOLUME is a public domain program. It's very useful to draw
revolution's volumes and to color them.
The only thing you have to do is to define a profile and an outline
(for the revolution) or many outlines if you want a complex volume.
Then you can orientate the created volume.
The window with compute options is only available if the volume is
correctly defined (i.e. the "QUIT" button of the editor is green).
Then, you have to click with mouse's left button on the
"ORIENT + LIGHTING" button (orientation and lighting are then computed)
or just on "ORIENT" button (if you want another view of the volume
with the same lighting) or on "LIGHTING" (if you want to see the volume
with the same orientation but with a different lighting).
2.THE VOLUME EDITOR
-------------------
After you have clicked on "EDIT VOLUME", the editor appears.
On the left you have the profile editor which contains a grid to
draw the profile, a button "CLEAR" to delete all the profile and a
button "SPLINE" to have a smooth profile.
2.1 PROFILE EDITOR
------------------
2.1.1 GRID
If you click in the grid with the left Mbutton, a point
appears. If you click in an other place, a line appears between
the two points.By this way, you can draw a profile. If you click
on the right Mbutton you start a second profile (you can do that
five times)
2.1.2 CLEAR
The "CLEAR" button deletes the profile (to use very carefully!).
2.1.3 SPLINE
This function uses the cubic splines method.
On the right of the screen, there is a SPLINE cursor which
displays the number of faces you'll have after you spline your
profile. The new profile is then displayed on the grid.
You're not obliged to use this function.
2.2 OUTLINE EDITOR
------------------
On the right of the screen, you can see 8 buttons, the SPLINE
cursor, a place where the current outline id displayed and a
vertical cursor to select the desired outline. There are 40
outlines. The five first ones are already defined but you can
redefine them.
2.2.1 DEFINE OUTLINE
Clicking on this button with the right Mbutton redefines the
fist five outlines according to the program library (there are 3
basic sets of outlines).
When you click on this button with left Mbutton, a new circular
grid appears on the screen and you can define the current
outline.
Then you draw the outline the same way you drew the profile. The
buttons SPLINE and CLEAR are still usable. Press ESC if you want to
quit without defining the outline. You are obliged to click SPLINE
to end outline definition.
2.2.2 SPLINE OUTLINE
You can use this function to compute the intermediate outlines
between the first and the last defined ones, So that you have smooth
variations along the Z axis.
2.2.3 SELECT OUTLINE
If you click this button with the left Mbutton, all the points of
the profile will be linked to the current outline and the
volume will thus be defined with the current outline.
But if you have used "SPLINE OUTLINE" before, you can automatically
link all the points of the profile to the computed outlines by
clicking the right Mbutton (even if the number of points is different
than the number of computed outlines, thus effectively using the
Z-axis variation of outlines
2.2.4 VERTICAL CURSOR
Use the left Mbutton to select the desired outline.
Use the Right Mbutton to copy an outline: when the cursor is on
the desired outline, click on it and move it to an other outline
and the first will be copied on the second.
2.2.5 MULTIPLE OUTLINE
You can link each point of the profile to one of the 40 outlines.
A little square appears around the first point of the profile.
Select an outline using the vertical cursor, then click on
"SELECT OUTLINE" to link the outline to the point and the square goes
to the next point.
During this operation, all the functions about outlines are usable.
2.2.6 CLEAR
You can delete the current outline by clicking the "CLEAR"
button with the left Mbutton. WARNING:if you click it with the
right button, all the outlines will be deleted...
2.2.7 LOAD, SAVE
You can load 3 things: 1. PROFILE (.PRF) Save just your profile
save 2. VOLUME (.VOL) Save defined volume
3. OUTLINE (.OUT)
When you save an outline, you save the current one
WHEN you load an outline, you load it on the current one
2.2.8 QUIT
If the button is red, the volume isn't well defined and you
will not be able to compute it. If the button is green, all is
OK.
3.MAIN SCREEN
-------------
Now, suppose that the volume is well defined. You can see five
windows on the screen.
3.1 EDIT WINDOW
---------------
On the first, there are two button: 1.EDIT VOLUME
2.EDIT PARAMETERS
If you click the second, a new screen appears.Just see all the
cursors and buttons:it's very easy to use.
1.OUTLINE(used to define the characteristics of the revolution drawing)
2.LIGHTING(used to define the coordinates of the light source)
3.VOLUME(used to move or scale the volume)
4.PERSPECTIVE(use to define the coordinate of the observer; z being
the distance between the object and the drawing plane
and (x,y) being the coordinate in the drawing plane)
Changing parameters in 3. or 4. need no other computation just click
on "DO VOLUME".
You can choose the type of drawing (COLOR,FILL,LINE) and the type of
faces (RECTANGULAR or TRIANGULAR).
Color modifies the faces color according to an exterior light source,
FILL draw all the faces in one color, LINE is a wireframe representation
(transparent faces).
If you change the type of faces, you will have to do a new computation.
3.2 COMPUTE WINDOW
------------------
If the volume is not yet computed, click on "ORIENT + LIGHTING"
or "ORIENT" or "LIGHTING".
You can select the color of the volume: Red, Green, Blue.
When the computation is ended, a new button appears on the DRAW WINDOW;
"DO VOLUME".
You can also realize an animation with "ANIMATE".
A new screen appears. First choose the animation's parameters then
either try the animation (without saving it on disk) or start it
(it is then saved on disk).
The program will create (you can stop it by pressing ESC) many
pictures(.PI1). You will have to use ANIME.PRG to see the animation.
3.3 DRAW WINDOW
---------------
Clicking on "DO VOLUME" starts to draw the volume.
If you click on "SEE VOLUME", you can see what currently is in the
drawing screen.
"LOAD" a picture (.PI1) on the drawing screen.
"SAVE" the drawing screen on disk (.PI1).
"PRINT" makes a hardcopy of the drawing screen.
3.4 ORIENTATION WINDOW
----------------------
You can choose the orientation of the volume (using spheric
coordinates plus spin around the initial Z axis)
Then you have to compute to have the new volume.
3.5 CONTROL WINDOW
------------------
"GOTO GEM" allows you to use an accessory (loaded before you start
VOLUME.PRG) like SNAPSHOT. But this option doesn't yet work very well...
"INFO" gives you the volume specifications and memory free on disk.
"QUIT" Bye, bye.
PS: This program is probably not BUGS free (nobody is perfect!!!).
I hope you a good work.