Home » Archimedes archive » Archimedes World » AW-1996-11.adf » !VRMLeyes_AspexDem » Models/VRMLfiles/MakeMods/MakeMods
Models/VRMLfiles/MakeMods/MakeMods
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » Archimedes archive » Archimedes World » AW-1996-11.adf » !VRMLeyes_AspexDem |
| Filename: | Models/VRMLfiles/MakeMods/MakeMods |
| Read OK: | ✔ |
| File size: | 1B11 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
VRMLEyes demonstration version will load the VRML files supplied with the program, other VRML files will not be recognised.
However, the demo version will allow users to create their own shapes in the form of
simple textfiles. The program will respond to commands for the following basic shapes:
Sphere / Cube / Cone / Cylinder
These shapes are just a taster of VRML, and tiny part of what VRML has to offer. VRML is designed to
create entire 3D immersive and interactive worlds. As VRMLEyes develops it will support the richer behaviours of VRML 2 which include animation, Java scripting, 3D sound, collisions and more.
A SIMPLE VRML FILE
~~~~~~~~~~~~~~~~~~
All VRML files consist of a header followed by some information about the model, a Sphere for
example is represented by the follwing text:
NOTE: VRMLEyes is case sensitive.
EXAMPLE 1. Sphere
~~~~~~~~~~~~~~~~~~~~
#VRML V1.0 ascii # this is the header, it says
# to VRMLEyes; " get your pen out
# and get ready to start drawing"
Sphere {
radius 2.0
} # this is the first complete instruction
# it is telling VRML to draw a Sphere
# with a radius of 2 units
EXAMPLE 2. Shading a shape using 'Materials' (add a bit of colour!).
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
You can colour your shape how you like by including values (between 0 and 1) for each of the
colours Red, Green and Blue.
There are several nodes (commands) used to colour an object diffuse, emmisive, specular, shininess, ambient and transparency. VRMLEyes recognises these nodes.
diffuseColor simply 'colours' the shape.
A red Sphere
~~~~~~~~~~~~
#VRML V1.0 ascii # header
Material { # get ready to do something like colour the object)
diffuseColor 1.0 0.0 0.0
} # get ready with max red, no green and no blue
# watch out for spelling and case!
Sphere {
radius 2.0
} # now draw the sphere, all in red
Experiment with different colours:
Red Green Blue
1.0 0.0 0.0 (Pure red)
0.5 0.0 0.0 (dark red)
1.0 1.0 0.0 (Yellow)
1.0 0.0 1.0 (Magenta)
etc.
The demo version also supports 'shininess'
Try amending the above example:
#VRML V1.0 ascii
Material {
diffuseColor 1.0 0.0 0.0
shininess 0.1 # make the object shiny, value between 0 and 0.5
}
Sphere {
radius 2.0
} # now draw the sphere, in shiny red
Cube, Cylinder and Cone?
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Try writing new VRML textfiles to draw these other shapes on the screen.
VRMLEyes demo version regognises the following style of commands:
Don't forget the headers etc.
To make a cube
~~~~~~~~~~~~~~
Cube {
height 2.0
width 4.0
depth 6.0
} (make a cuboid 2x4x6 units)
To make a Cylinder
~~~~~~~~~~~~~~~~~~
Cylinder {
height 4.0
radius 2.0
} (make a cylinder 4 units high and 4 wide)
To make a Cone
~~~~~~~~~~~~~~
Cone {
height 6.0
bottomRadius 2.0
} (make a cone which is 6 units high with a base 4 units wide)
NB. The units can be of any desired measurement. If you chose centimeters as your base then all other measurements in the complete model should be centimeters as well. VRMLEyes can place your
object accurately wherever desired.
PLACING A SHAPE
~~~~~~~~~~~~~~~
VRMLEyes can be told to move a shape using the 'Translation' node.
The Translation node can be used to place an object accurately anywhere in 3D space relative
to the previous origin. This is achieved by defining a new position in the X, Y and Z planes.
First choose a scale, centimeters for example.
The following example draws one cube in the centre of the screen then draws as second cube to sit on top of it.
#VRML V1.0 ascii # header
Cube {
height 2.0 # draw a cube 2x2x2 metres
width 2.0
depth 2.0
}
Translation {
translation 0.0 2.0 0.0 # translate, or move, the point of origin 2 in the Y plane.
# if the number was -2 then the origin would be moved downward
}
Cube {
height 2.0 # Draw a second cube at the new origin
width 2.0
depth 2.0
}
ROTATING A SHAPE
~~~~~~~~~~~~~~~~
Each shape can be rotated in any direction by a specific amount in any direction. This function
is controlled by the Rotation Node. Its OK to think in degrees but you will need to convert all
your angles to radians before using them with VRML.
The following example describes a 'Cross' shape made from two cylinders. see example file 3.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#VRML V1.0 ascii
Cylinder {
height 30.0
radius 2.0 # draw a cylinder
}
Rotation {
rotation 0.0 0.0 1.0 1.0472 # rotate the cylinder in the Z axis by 1.0472
# radians (60 degrees). The figure 0.0 0.0 1.0
# represent the X, Y and Z axix. The Z axis is
# set with a '1' followed by the angle in radians.
# 0.0 1.0 0.0 1.0472 would rotate the cylinder
# in the Y axis
}
Cylinder {
height 30.0
radius 2.0
}
***This example produces intersecting shapes, so the Z Buffer will need to be used.
RADIANS
~~~~~~~
for those who can't remember school:
rad = (deg / 180) x 3.142
Common angles:
Degrees Radians
30 deg 0.524 rad
60 deg 1.0472
90 deg 1.571
180 deg 3.142
270 deg 4.172
The products VRMLEyes an DaVinci90 will render raw VRML files as data or text files, which how they normally arrive. If the filetype is set to VRML then a VRML model can be loaded by double-clicking.
With VRMLEyes demonstration one can can create quite complex shapes, colour them, move
and rotate them. Why not buy the complete version and join in at the start of the rapidly
growing world of 3D.
VRMLEyes will also load and render any DaVinci90 3D model. DaVinci is a 3D modeller which could be refarded as a VRML editor.
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00000270 65 2e 0a 0a 0a 41 20 53 49 4d 50 4c 45 20 56 52 |e....A SIMPLE VR|
00000280 4d 4c 20 46 49 4c 45 0a 7e 7e 7e 7e 7e 7e 7e 7e |ML FILE.~~~~~~~~|
00000290 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 0a 41 6c 6c 20 56 |~~~~~~~~~~.All V|
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00000330 4c 45 79 65 73 20 69 73 20 63 61 73 65 20 73 65 |LEyes is case se|
00000340 6e 73 69 74 69 76 65 2e 20 0a 0a 45 58 41 4d 50 |nsitive. ..EXAMP|
00000350 4c 45 20 31 2e 20 20 20 53 70 68 65 72 65 0a 7e |LE 1. Sphere.~|
00000360 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e |~~~~~~~~~~~~~~~~|
00000370 7e 7e 7e 0a 0a 23 56 52 4d 4c 20 56 31 2e 30 20 |~~~..#VRML V1.0 |
00000380 61 73 63 69 69 20 20 20 20 20 20 20 23 20 74 68 |ascii # th|
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000003b0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
000003c0 20 23 20 74 6f 20 56 52 4d 4c 45 79 65 73 3b 20 | # to VRMLEyes; |
000003d0 22 20 67 65 74 20 79 6f 75 72 20 70 65 6e 20 6f |" get your pen o|
000003e0 75 74 0a 20 20 20 20 20 20 20 20 20 20 20 20 20 |ut. |
000003f0 20 20 20 20 20 20 20 20 20 20 23 20 61 6e 64 20 | # and |
00000400 67 65 74 20 72 65 61 64 79 20 74 6f 20 73 74 61 |get ready to sta|
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00000510 6c 73 27 20 28 61 64 64 20 61 20 62 69 74 20 6f |ls' (add a bit o|
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00000530 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e |~~~~~~~~~~~~~~~~|
*
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00000a50 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00000a60 20 20 20 20 20 20 20 20 20 23 20 6e 6f 77 20 64 | # now d|
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00000aa0 64 20 43 6f 6e 65 3f 0a 7e 7e 7e 7e 7e 7e 7e 7e |d Cone?.~~~~~~~~|
00000ab0 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e |~~~~~~~~~~~~~~~~|
00000ac0 7e 7e 7e 0a 54 72 79 20 77 72 69 74 69 6e 67 20 |~~~.Try writing |
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00000b80 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 0a 43 |~~~~~~~~~~~~~~.C|
00000b90 75 62 65 20 7b 0a 20 20 20 68 65 69 67 68 74 20 |ube {. height |
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00000bb0 30 0a 20 20 20 64 65 70 74 68 20 20 36 2e 30 0a |0. depth 6.0.|
00000bc0 7d 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |} |
00000bd0 20 20 20 20 20 20 20 20 20 20 20 20 28 6d 61 6b | (mak|
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00000c10 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 0a 43 |~~~~~~~~~~~~~~.C|
00000c20 79 6c 69 6e 64 65 72 20 7b 0a 20 20 20 68 65 69 |ylinder {. hei|
00000c30 67 68 74 20 34 2e 30 0a 20 20 20 72 61 64 69 75 |ght 4.0. radiu|
00000c40 73 20 32 2e 30 0a 7d 20 20 20 20 20 20 20 20 20 |s 2.0.} |
00000c50 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00000c60 20 20 28 6d 61 6b 65 20 61 20 63 79 6c 69 6e 64 | (make a cylind|
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