Dec 092017

Spherical object generator for VIVID ray traces. | |||
---|---|---|---|

File Name | File Size | Zip Size | Zip Type |

EXAMP2.GIF | 45346 | 44789 | deflated |

EXAMPLE.GIF | 59086 | 57448 | deflated |

README.DOC | 8192 | 3243 | deflated |

SPHERCAL.EXE | 40086 | 23264 | deflated |

# Download File SPHRCL20.ZIP Here

## Contents of the README.DOC file

S P E R E C A L

VERSION 1.1

Written By: Jeff Pettyjohn

Welcome to spherecal. This program is a result of my

first experiments in C++ programming. I hope it will suit

your fancy. I am a full-time student attending Penn State

UV studying mechanical engineering. I wanted to learn C++

programming. So, I gave it a wing and I wanted to share the

results.

This program is written originally for Steven Coy's

VIVID version 2. I have also now added the ability to

produce CTDS outputs as well. ( I hope it works )

The spherecal executable is actually called

SPHERCAL.EXE contained in this .ZIP file. Sorry, DOS only

allows 8 character file names. TOO BAD.

Any way, spherecal will always place the calculated file

of spheres, cones, and polygons to SPHERE.VO. SO, if you have

a file named SPHERE.VO that you want to keep, you might want

to consider renaming it. Just a suggestion.

There's not too much to explain about this program, so

I'll just give a brief description of how the program works,

and let you go to explore.

First, this program was written to calculate the

location of spheres around a sphere. I built on this and

added the ability to generate grids around a sphere, and

generate a spiral around a sphere.

When running the program, SPHERCAL.EXE will first ask

you which sphere option or type you would like. The three

choices are " S " for spheres, " G " for grids, and " P " for

spirals, all of which will be described bellow.

There are now two command line parameters added. The are

-CT --- this will output CTDS coordinates

( Connect The Dot Smoother )

-XT --- this will turn on the Extended options to

be explained further in this document

These parameters are typed in directly after sphercal at the

DOS prompt. Here's an example:

SPHERCAL -CT -XT

|___|__ Don't forget the spaces

Typing this at the DOS prompt will turn on CTDS output with

the Extended Options on. It doesn't matter which order

they're entered, Or if they're in capitol or lowercase

letters.

Please note, all the descriptions and calculations are

based on the assumption that in the STUDIO set up for your

scene, the Z axis is up, the X axis is right to left, and the

Y axis moves in and out of the screen. This can be

accomplished by setting: UP 0 0 1 , in the studio. The output

file, " SPHERE.VO ", can be included into your scene by the

statement: #include SPHERE.VO , directly after your surface

definition.

-------------------------------------------------------------

TYPE : SPHERES

Spheres will calculate the location of spheres around a

central sphere. Sphercal will ask for the number of

horizontal and vertical spheres. The horizontal spheres are

those around the Z axis, and the vertical spheres are those

that go up and down the Z axis. I hope that clears things up

a bit. Any way, Sphercal asks for the radius of each

individual sphere and the radius of the main sphere ( the

sphere that the other spheres are to be placed around ),

fairly obvious hopefully. Spherecal also asks for the Off

center location separated by spaces. Sphercal assumes the

main sphere is located at 0-X 0-Y 0-Z in your scene. If you

wish to change this, simply enter the new location at this

prompt like this:

3 -15 100

|___|

DON'T FORGET THE SPACES

Sphercal will also ask for Beaded or Smooth. Beaded means

that only the spheres will be generated. Smooth means that a

cone will be generated connecting the spheres.

This part of the program is a little buggy; but it

creates some interesting outputs. So I decided to let it be.

Try entering 3 for horizontal spheres, and 12 for vertical

spheres, fill in the other values, choose the SMOOTH option,

and see what you get.

If the CTDS Output is on, Only the spheres X Y Z

location and the sphere's radius will be output to

SPHERE.VO. SPHERCAL also will ask you for the number of

coordinates to be generated befor placing a blank line.

This file can then be used for CTDS.

As for now, there are no Extended options available for

Type SPHERES. Your welcome to use the -XT when using this

type; but it won't do anything.

TYPE : GRIDS

This is one of my favorite types. Sphercal asks for # of

vertical disections. These are the ones going up and down the

sphere or Z axis. Sphercal will then ask you for # of

horizontal disections. These are the ones around the Z axis.

The radius of the intersection spheres are those place at the

intersection of each grid, and the radius of the connecting

bars controls the thickness of the cones that connect the

spheres. To understand this better try an intersection radius

of 4 and a connecting bar radius of 2 around a final sphere

of 40. Sphercal also asks if you want Grids or Plates. The

Grids option creates the grid around the sphere as explained

above. The Plates option will place a polygon with points at

each intersection. The Intersection spheres and connector

bars will not be generated with this option.

If the Extended options are on, You can also control the

starting and ending vertical and horizontal disections. This

may require some playing around to get the desired view (

depending on which part of the sphere you don't want ), But

for a point of reference, here it goes. If the camera is on a

positive Y axis and is looking directly at the sphere, the

sphere will start being generated from the left, swing

around the Y axis towards the camera, and then continue

around to the back of the sphere. The grid is also generated

from top to bottom at the same time. Thats the best and

easiest description I could come up with. So, If you come up

with a better one, I'm open to suggestions.

The CTDS output options are effective here as well; but

it is untested. I'm not exactly sure how well it works. If

someone out there plays with this option, let me know how it

works.

TYPE : SPIRALS

Spherecal first asks you if you want the spiral to turn

Forwards or Backwards around the Z axis or sphere. Assuming

the camera is on a positive Y axis, Forwards will calculate

the spiral turning counter-clock wise. Sphercal also asks for

the number of turns around the sphere. Sorry, only whole

number of turns for now. You can control the thickness of the

sphere at three locations, the beginning, middle and end of

the spiral. The Off-center location and Beaded or Smooth

options were discussed in TYPE : SPHERES, and work the same

way here. CTDS options are available here as well. Sorry,

There aren't any extended options for this yet; but stay

tuned.

-------------------------------------------------------------

The best way to understand all this is to try some values and

see what you get. OK. Now for the legal junk.

Nothing special. This program is free for distribution

for NONCOMMERCIAL USE ONLY as long at this documentation and

SPHERCAL.EXE are distributed together, and that no

modifications are made to either. I am not asking for any

registration fee or anything like that. Just knowing that

you actually read this far puts a grin on my face. HA HA.

However, I would love to hear your comments on this program

and if your really moved to, I wouldn't reject any donations

for my college education sent to the address below.

Jeffrey Pettyjohn

248 Nollyn Drive

Dallastown, PA 17313

I can also be contacted at:

CompuServe ID# 76640,163

"The Graphics Alternative" (510) 524-2780

You Can Call Me Ray BBS (708) 358-5611

Hope you enjoy!!!!

PS:

I just wanted to give a special thanks to Truman Brown for

all his help and suggestions to make this program better.

VERSION 1.1

Written By: Jeff Pettyjohn

Welcome to spherecal. This program is a result of my

first experiments in C++ programming. I hope it will suit

your fancy. I am a full-time student attending Penn State

UV studying mechanical engineering. I wanted to learn C++

programming. So, I gave it a wing and I wanted to share the

results.

This program is written originally for Steven Coy's

VIVID version 2. I have also now added the ability to

produce CTDS outputs as well. ( I hope it works )

The spherecal executable is actually called

SPHERCAL.EXE contained in this .ZIP file. Sorry, DOS only

allows 8 character file names. TOO BAD.

Any way, spherecal will always place the calculated file

of spheres, cones, and polygons to SPHERE.VO. SO, if you have

a file named SPHERE.VO that you want to keep, you might want

to consider renaming it. Just a suggestion.

There's not too much to explain about this program, so

I'll just give a brief description of how the program works,

and let you go to explore.

First, this program was written to calculate the

location of spheres around a sphere. I built on this and

added the ability to generate grids around a sphere, and

generate a spiral around a sphere.

When running the program, SPHERCAL.EXE will first ask

you which sphere option or type you would like. The three

choices are " S " for spheres, " G " for grids, and " P " for

spirals, all of which will be described bellow.

There are now two command line parameters added. The are

-CT --- this will output CTDS coordinates

( Connect The Dot Smoother )

-XT --- this will turn on the Extended options to

be explained further in this document

These parameters are typed in directly after sphercal at the

DOS prompt. Here's an example:

SPHERCAL -CT -XT

|___|__ Don't forget the spaces

Typing this at the DOS prompt will turn on CTDS output with

the Extended Options on. It doesn't matter which order

they're entered, Or if they're in capitol or lowercase

letters.

Please note, all the descriptions and calculations are

based on the assumption that in the STUDIO set up for your

scene, the Z axis is up, the X axis is right to left, and the

Y axis moves in and out of the screen. This can be

accomplished by setting: UP 0 0 1 , in the studio. The output

file, " SPHERE.VO ", can be included into your scene by the

statement: #include SPHERE.VO , directly after your surface

definition.

-------------------------------------------------------------

TYPE : SPHERES

Spheres will calculate the location of spheres around a

central sphere. Sphercal will ask for the number of

horizontal and vertical spheres. The horizontal spheres are

those around the Z axis, and the vertical spheres are those

that go up and down the Z axis. I hope that clears things up

a bit. Any way, Sphercal asks for the radius of each

individual sphere and the radius of the main sphere ( the

sphere that the other spheres are to be placed around ),

fairly obvious hopefully. Spherecal also asks for the Off

center location separated by spaces. Sphercal assumes the

main sphere is located at 0-X 0-Y 0-Z in your scene. If you

wish to change this, simply enter the new location at this

prompt like this:

3 -15 100

|___|

DON'T FORGET THE SPACES

Sphercal will also ask for Beaded or Smooth. Beaded means

that only the spheres will be generated. Smooth means that a

cone will be generated connecting the spheres.

This part of the program is a little buggy; but it

creates some interesting outputs. So I decided to let it be.

Try entering 3 for horizontal spheres, and 12 for vertical

spheres, fill in the other values, choose the SMOOTH option,

and see what you get.

If the CTDS Output is on, Only the spheres X Y Z

location and the sphere's radius will be output to

SPHERE.VO. SPHERCAL also will ask you for the number of

coordinates to be generated befor placing a blank line.

This file can then be used for CTDS.

As for now, there are no Extended options available for

Type SPHERES. Your welcome to use the -XT when using this

type; but it won't do anything.

TYPE : GRIDS

This is one of my favorite types. Sphercal asks for # of

vertical disections. These are the ones going up and down the

sphere or Z axis. Sphercal will then ask you for # of

horizontal disections. These are the ones around the Z axis.

The radius of the intersection spheres are those place at the

intersection of each grid, and the radius of the connecting

bars controls the thickness of the cones that connect the

spheres. To understand this better try an intersection radius

of 4 and a connecting bar radius of 2 around a final sphere

of 40. Sphercal also asks if you want Grids or Plates. The

Grids option creates the grid around the sphere as explained

above. The Plates option will place a polygon with points at

each intersection. The Intersection spheres and connector

bars will not be generated with this option.

If the Extended options are on, You can also control the

starting and ending vertical and horizontal disections. This

may require some playing around to get the desired view (

depending on which part of the sphere you don't want ), But

for a point of reference, here it goes. If the camera is on a

positive Y axis and is looking directly at the sphere, the

sphere will start being generated from the left, swing

around the Y axis towards the camera, and then continue

around to the back of the sphere. The grid is also generated

from top to bottom at the same time. Thats the best and

easiest description I could come up with. So, If you come up

with a better one, I'm open to suggestions.

The CTDS output options are effective here as well; but

it is untested. I'm not exactly sure how well it works. If

someone out there plays with this option, let me know how it

works.

TYPE : SPIRALS

Spherecal first asks you if you want the spiral to turn

Forwards or Backwards around the Z axis or sphere. Assuming

the camera is on a positive Y axis, Forwards will calculate

the spiral turning counter-clock wise. Sphercal also asks for

the number of turns around the sphere. Sorry, only whole

number of turns for now. You can control the thickness of the

sphere at three locations, the beginning, middle and end of

the spiral. The Off-center location and Beaded or Smooth

options were discussed in TYPE : SPHERES, and work the same

way here. CTDS options are available here as well. Sorry,

There aren't any extended options for this yet; but stay

tuned.

-------------------------------------------------------------

The best way to understand all this is to try some values and

see what you get. OK. Now for the legal junk.

Nothing special. This program is free for distribution

for NONCOMMERCIAL USE ONLY as long at this documentation and

SPHERCAL.EXE are distributed together, and that no

modifications are made to either. I am not asking for any

registration fee or anything like that. Just knowing that

you actually read this far puts a grin on my face. HA HA.

However, I would love to hear your comments on this program

and if your really moved to, I wouldn't reject any donations

for my college education sent to the address below.

Jeffrey Pettyjohn

248 Nollyn Drive

Dallastown, PA 17313

I can also be contacted at:

CompuServe ID# 76640,163

"The Graphics Alternative" (510) 524-2780

You Can Call Me Ray BBS (708) 358-5611

Hope you enjoy!!!!

PS:

I just wanted to give a special thanks to Truman Brown for

all his help and suggestions to make this program better.

December 9, 2017
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