TweetFollow Us on Twitter

MacWireFrame
Volume Number:7
Issue Number:11
Column Tag:Tools of the Trade

MacWireFrame & Desktop Lawyer

By Dave Kelly, MacTutor Editorial Board

MACWIREFRAME 3-D Graphics

Amplified Intelligence has recently released their three-dimensional graphics library for THINK Pascal. The MPW Pascal counterpart has been available for some time now. The package includes a sample application program, MacWireFrame that illustrates the capabilities of the 3-D library.

MacWireFrame is a wire-frame editor used to create three-dimensional wire-frames. A wire-frame is a mathematical term used to describe a three-dimensional object formed by lines or wires. The wire-frame lines or wires represent the path between two vertices.

The source code supports five key data types. By understanding these data types, you will be ready to use the MacWireFrame library.

MacWireFrame uses linked arrays to represent rotation and scaling matrices, translation vectors, three dimensional points and lines in space, two dimensional points and lines in planes and view matrices used to transform three dimensional data into two dimensional data. These linked arrays are dynamically allocated array elements that consist of a handle to a record containing a real number and handles to two other linked array elements (the next row element and the next column element). MacWireFrame performs matrix multiplication on linked arrays to accomplish rotation, scaling and mapping from three down to two dimensions.

A spacepoint is an array of three real numbers: the X, Y, and Z coordinates of a point in space. A spacepoint is the basic building block of wireframes. The MacWireFrame manual explains the spacepoint type in an amusing way:

ABOUT SpacePoint

“SpacePoint = array[1 3] of REAL;”

“The single line of code above really says a lot about our universe. It says that a point in space is defined by three real numbers.”

“Once, back a long time ago, I was walking into the cafeteria in high school when I noticed that the nerd crowd was having a heated argument and, being a troublemaker, I went over to start trouble. I quickly learned that they were arguing about whether it is possible to assign a real number to every point in space.”

“Why not ask my smart friend, Dave,” I thought. Dave was one of my high school buddies who later went on to get a Ph.D. in Physics and became a physics professor. I began to explain the problem to Dave: Say that you started out with one line in space and started assigning numbers to it. By the time you were done, you would have used up all the real numbers and wouldn’t have any left over for any of the other points in space. “Yes,” my friend Dave answered, “but what if, instead of a straight line, you used a single squiggle line that went around all over the place until it eventually hit every point in the universe?”

“This same type of problem has vexed mathematical thinkers since the beginning of Man. In fact, according to legend, there was once a cave man named Grunt, who lived back in the days when math was a lot more simple. People back then would count by saying, “one, two, three, many.”

“For example, Grunt had two wives and many children. On one of his recent hunting trips, Grunt had killed two deer, one antelope and many jack rabbits. Back then, numbers above two to the second power were so rare that, for most practical purposes, it didn’t make any difference just exactly how big they were -- kind of like numbers larger than two to the thirty second power are today.”

“But then one day Grunt began to think about mathematics. Near Grunt’s cave were two piles of rocks, and although each pile had many rocks, Grunt began to wonder which pile had more rocks. Grunt wished that he could first count the number of rocks in one pile and then count the rocks in the second pile, so that he could find out which pile had more rocks, but he lacked the mathematical sophistication to do this.”

“For awhile, Grunt and his friends sat around arguing about which pile of many rocks actually contained more rocks than the other, until finally Grunt came up with an idea. Grunt thought, “What if I take one rock off the first pile of many rocks and then one rock off the second pile of many rocks and keep doing this until finally one of the piles has all it’s rocks used up. Then at last, I will know which pile has more rocks. Grunt had discovered the mathematical concept of a one to one correspondence.”

“Of course, each pile of many rocks had many rocks in it and Grunt soon got tired and hungry and went off to pick berries before he ever really found the answer to his question, but never the less Grunt had had a brilliant idea.”

“The first line of code in the MacWireFrame Editor uses only slightly more complicated thinking. A Mac II computer with its thirty two bit registers can only comprehend numbers up to two to the thirty second power. There are a lot more points than that in the universe and a lot more points than that in the theory used by the MacWireFrame Editor.”

“There are more points in the universe than there are real numbers. This might be hard for us to understand today because infinity is somewhat more of a difficult concept today than it was in Grunt’s day. Infinity really means “so many that it is theoretically impossible to count”.

“What the first line of code in the Editor says to the computer is that there is a one to one correspondence between every point in the universe and every possible ordered triplet of real numbers”.

A vertex is a three-dimensional point in space that is connected to three other vertices by lines or wires. It is one of the key building blocks of a wire-frame. A vertex consists of a spacepoint and an array of handles to three other vertices. A wireframe is then built from an interconnected set of vertices. Representing wireframes as interconnected vertices has numerous advantages. The most spectacular of these advantages can be seen while doing three dimensional dragging. If you select some of the vertices in a wireframe and drag them while leaving the others behind, the connections between the selected and unselected vertices will stretch like rubber bands.

Another advantage is that since vertices are linked with handles to other vertices, operations need to be performed only once instead of three times. This is because when drawing a vertex alone, you would draw the three lines that connect to it. Since the vertices are linked to each other, it is not necessary to draw the lines twice. This makes the operation much more efficient.

Some surface models based on polygons claim to have wireframe capabilities, but each line in a wireframe is associated with at least two polygons in a surface model so the same operation done to an interconnected set of polygons takes six times as long as in MacWireFrame.

A pointlist is a linked list of vertices. This type comes in handy for performing operations on vertices because of its linear nature. Vertices have three ways to go from any given vertex, but on a pointlist, there is only one.

An entity contains all information needed by MacWireFrame to maintain the display interface. There are five windows available in MacWireFrame: isometric, top, front, side and custom views. An entity maintains the relationship of these views. In addition, an entity type contains a field that keeps track of which vertices are highlighted.

A space point is a field in the type vertex which is a field in the type pointlist which is a field in the type entity. Thus an entity represents all of the space points and vertices in an object. The wireframe entity shown in the figure is made up of two cube objects. The smaller one was scaled copied and pasted on top of the larger one using the MacWireFrame editor.

Both ends of a wire-frame wire or line is tied to a vertex. The wires are straight (no curves) and have no hidden lines. Thus, you can see that every vertex has three lines attached to it and all of the lines and vertices make up the entire entity.

The MacWireFrame application allows you to create wire-frames based on a cube or a tetrahedron. From there, you can add or remove lines, rotate the object, rotate the vertex, scale the object, scale a portion of the object, translate an object or drag the object with the mouse. A dimension dialog can be used to tell you the distance between two highlighted vertices of an object. TransformObject is the function at the heart of MacWireFrame that makes things tick. You give the TransformObject function a pointlist and a predefined linked array. The function looks at the size and if it is a translation vector then it will add the vectors to each point on the list thus implementing translation. If the matrix is a 3X3 matrix, then TransformObject will matrix multiply each spacepoint on the pointlist thus implementing rotation and scaling.

The source code in THINK Pascal format is fully documented in a 78 page spiral bound book. Between the comments in the source code and the manual an experienced programmer should have no problem understanding how MacWireFrame is put together. However, some of the routines may require some understanding of matrix mathematics. It isn’t necessary to have a full understanding of all of the math though. The manual illustrates this with the following story:

“Recently I picked up an article in a magazine which used the phrase, “matrix multiplication is well understood”, and maybe this is the case if you’re a Ph.D. physicist like my friend Dave, but most people like my punk rocker friend Dusty don’t really understand it too well.”

“Punk rockers in Sacramento have this drinking game called quarters. What you do is take a glass and put it in the middle of the table. Everyone sits around the table. Going around in a circle each player tries to bounce the quarter off the table and up into the glass. If you make it you get to pick one of the other players and they have to drink. If you miss, it’s the next player’s turn unless you want to chance it, but if you miss then you have to drink.”

“There is one other rule in the punk rock Sacramento version of quarters. If you get really lucky and make it three times in a row you get to make up a new rule. One time Dusty made up a this rule that before you drink you have to grab your left ear with your right hand and yank it three times and as you yank it say arf, arf, arf. But if you forget to do this you have to drink again. Since the winner of the game is the one left standing when everyone else has passed out, and as the game progresses people get more and more likely to forget the rules, this can be really strategic.”

“Once I tried to explain matrix multiplication to Dusty, how you first multiply this row by this column and so on. “But, why do you do it that way? Why not multiply that row and this column?”, Dusty asked. I explained to Dusty it’s just a rule that somebody made up that proved to be useful. “Oh, I get it, this is some rule that some old 19th century mathematician made up.”, Dusty said. Making up strange rules was something that for Dusty was well understood.”

“Too bad Dusty hadn’t lived in the 19th century or he could have been a great mathematician. On the other hand it’s kind of sad that Sir William Rowan Hamilton didn’t live in our time. While matrix multiplication would have already have been thought of, he probably would have been great at the game of quarters.”

You can see from these stories that the manual tries to make the subject of wireframes interesting, not just dry technical reading. The first half of the book tells users how to make use of the MacWireFrame application. The last half describes the UNIT modules used and each procedure and function is described. You’ll need to become familiar with each function and procedure if you intend to use the MacWireFrame source code to create your own customized wireframe application.

Each UNIT module is described first with an overall description, then with a description of routines. Next all of the variables used. The only improvement that could be made here would be to describe the function of each variable in more detail. Also, there is no index to the manual. Since each module is described, it is easy to get familiar with all of MacWireFrame’s procedures and functions.

Amplified Intelligence is now offering a special price of $299 if you order through MacTutor. Any of you that are interested in 3D graphics will find MacWireFrame useful.

MacWireFrame is available from:

MACTUTOR or

Amplified Intelligence

2810 Redding Ave.

P. O. Box 189279

Sacramento, CA. 95818

Phone: 916-737-1550

Price: $299 for a limited time only; List Price: $495

Requires: Macintosh II family computer with Color Monitor, THINK Pascal 2.0 or later.

Programming ability is not required for use of the MacWireFrame Application. Programming will be required for use of the source code. Understanding of matrix math is helpful.

Not copy protected.

THE DESKTOP LAWYER

Lawyers are generally disliked. Most of you have seen Nolo Press’s books on various “Do-It-Yourself” law topics. Nolo’s WillMaker lets you fill in the blanks to complete your will in just a few minutes. The Desktop Lawyer has this same “Do-It-Yourself” law attitude. It’s produced by The Open University and distributed by National Media Associates.

In the Desktop Lawyer is not an application, but is a set of over 300 legal documents in MS Word format. (The templates are available on MS/DOS disks for WordPerfect and in ASCII files). Each template is a complete legal document that can be customized to suit your needs. Laurence J. Pino, ESQ of the law firm of Pino & Dicks of Orlando, Florida, produced the templates to simplify “Do-It-Yourself” law.

Developers will be especially interested in several of the templates including:

• Partnership Agreement

• Joint Venture Agreement

• Employment Agreement

• Consulting Agreement

• Business Consultant Agreement

• Employee Confidentiality , nondisclosure and nonuse agreement

• Sales Representative Agreement (Company)

• Independent Contractor Agreement

• Computer Hardware and Software Marketing Agreement

• Product License Agreement

• Grant of right to use name

• Contract for Sale and Purchase of Business

• Master Equipment Lease

• Third Party Rental Agreement

• Articles of Incorporation

• By-Laws

• Contract for sale of personal property

The other templates include Business Sales and Closing, Investment, Real Estate, Estate Planning, Mortgages, Wills, trusts, Collection documents, agreements, leases, rentals, and construction. The 137 page manual includes information on where to file documents and filing fees. In addition, there are tips and comments for each of the documents types.

Although the templates are only available in MS Word format, you will find that they are not difficult to customize. A new version of the Desktop Lawyer is being released in September 1991 with a revised manual that includes instructions for each legal document. The new manual will include information such as how to fill in each form, the circumstances you do and don’t need an attorney, and where to find basics and procedures in other parts of the manual for making the transaction legal. Four new forms are also being added.

There is really no other package with as many law forms in one package. People that have used the Desktop Lawyer have said that they have “saved several times the cost of the material”. It has something for every business owner.

The Desktop Lawyer is distributed by:

U. S. Software Resource of

Novato, CA. and Houston, TX.

8 Digital Drive, Suite 100

Novato, CA. 94949

Phone: 800-879-7899

Price: $139;

Special Introductory price $99.95 (till Dec. 31st, 1991)

The Desktop Lawyer is published by:

The Legal Institute of America for

The Open University

P. O. Box 1511

Orlando, Florida 32802

1-800-874-0388

Not copy protected.

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

OmniGraffle Pro 6.1.4 - Create diagrams,...
OmniGraffle Pro helps you draw beautiful diagrams, family trees, flow charts, org charts, layouts, and (mathematically speaking) any other directed or non-directed graphs. We've had people use... Read more
OmniGraffle 6.1.4 - Create diagrams, flo...
OmniGraffle helps you draw beautiful diagrams, family trees, flow charts, org charts, layouts, and (mathematically speaking) any other directed or non-directed graphs. We've had people use Graffle to... Read more
MegaSeg 5.9.5 - Professional MP3 DJ appl...
MegaSeg is a complete solution for pro audio/video DJ mixing, radio automation, and music scheduling with rock-solid performance and an easy-to-use design. Mix with visual waveforms and Magic... Read more
MarsEdit 3.6.8 - Quick and convenient bl...
MarsEdit is a blog editor for OS X that makes editing your blog like writing email, with spell-checking, drafts, multiple windows, and even AppleScript support. It works with with most blog services... Read more
BBEdit 11.0.3 - Powerful text and HTML e...
BBEdit is the leading professional HTML and text editor for the Mac. Specifically crafted in response to the needs of Web authors and software developers, this award-winning product provides a... Read more
Microsoft Office Preview 15.8 - Popular...
Welcome to the new and modern Microsoft Office for Mac. You will receive regular updates automatically until the official release in the second half of 2015. With the redesigned Ribbon and your... Read more
Yosemite Cache Cleaner 9.0.5 - Clear cac...
Yosemite Cache Cleaner is an award-winning general purpose tool for OS X. YCC makes system maintenance simple with an easy point-and-click interface to many OS X functions. Novice and expert users... Read more
ExpanDrive 4.3.2 - Access cloud storage...
ExpanDrive builds cloud storage in every application, acts just like a USB drive plugged into your Mac. With ExpanDrive, you can securely access any remote file server directly from the Finder or... Read more
RapidWeaver 6.0.8 - Create template-base...
RapidWeaver is a next-generation Web design application to help you easily create professional-looking Web sites in minutes. No knowledge of complex code is required, RapidWeaver will take care of... Read more
Artlantis Studio 5.1.2.7 - 3D rendering...
Artlantis Studio is a unique and ideal tool for performing very high resolution rendering easily and in real time. The new FastRadiosity engine now lets you compute images in radiosity-even in... Read more

Bored? MyLeisure FreeTime Maximizer Will...
Bored? MyLeisure FreeTime Maximizer Will Take Care of That! Posted by Jessica Fisher on March 5th, 2015 [ permalink ] iPhone App - Designed for the iPhone, compatible with the iPad | Read more »
New Publisher Allstar Games Heads West w...
Allstar Games has announced its first mobile title designed for western audiences, Allstar Heroes. The game will be a massive online battle arena (MOBA) that offers dozens of heroes for you to collect and pit against your opponents. As each hero has... | Read more »
RAD Boarding Review
RAD Boarding Review By Jennifer Allen on March 5th, 2015 Our Rating: :: NEARLY RADUniversal App - Designed for iPhone and iPad RAD Boarding isn’t quite one of the greats, but it has potential.   | Read more »
Presenting the International Mobile Gami...
11th Annual International Mobile Gaming Awards ceremony, hosted by actress Allison Haislip, gathered mobile game developers and publishers from around the world. They chose 13 winners out of the 93 nominations. British studio USTWO won the the Grand... | Read more »
AG Drive Review
AG Drive Review By Tre Lawrence on March 5th, 2015 Our Rating: :: FUTURISTIC STREET RACING.Universal App - Designed for iPhone and iPad Futuristic racing… interstellar style.   | Read more »
GDC 2015 – Nightmare Guardians is an Int...
GDC 2015 – Nightmare Guardians is an Interesting Hybrid of MOBA and Lane Defense Posted by Rob Rich on March 5th, 2015 [ permalink ] I have to say that lane defense (i.e. | Read more »
Overkill 3 Review
Overkill 3 Review By Tre Lawrence on March 5th, 2015 Our Rating: :: WHO'S NEXT?Universal App - Designed for iPhone and iPad Cover system gameplay in the third-person.   Developer: Craneballs Price: Free Version Reviewed: 1.1.6... | Read more »
Warner Bros. Interactive Entertainment A...
Warner Bros. has some exciting games coming down the pipe! | Read more »
GDC 2015 – Star Trek Timelines will Prob...
GDC 2015 – Star Trek Timelines will Probably Make Your Inner Trekkie Squeal With Glee Posted by Rob Rich on March 4th, 2015 [ permalink ] Any popular fictional universe has its fair share of fan fiction – where belo | Read more »
Protect Yourself from an Onslaught of Ca...
Surprise Attack Games has announced a Cat-astrophic new physics puzzler called Fort Meow! In the game, a young girl named Nia finds her grandfather’s journal which triggers an all mighty feline attack! Why do the cats want the journal? Who knows,... | Read more »

Price Scanner via MacPrices.net

Apple restocks refurbished 15-inch Retina Mac...
The Apple Store has restocked Apple Certified Refurbished 2014 15″ Retina MacBook Pros, available for up to $400 off the cost of new models. An Apple one-year warranty is included with each model,... Read more
Roundup of MacBook Air sale prices, models up...
B&H Photo has MacBook Airs on sale for up to $100 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 11″ 128GB MacBook Air: $799 100 off MSRP - 11″ 256GB MacBook Air: $999 $100... Read more
New Firstrade Mobile App Enables On-The-Go Tr...
Firstrade Securities Inc. has announced its new mobile app, which gives investors immediate access to the company’s trading platform on all mobile devices. The app was developed in-house and was... Read more
Sonnet Introduces USB 3.0 + eSATA Thunderbolt...
Sonnet has announced the launch of its new USB 3.0 + eSATA Thunderbolt Adapter for easy connectivity to USB 3.0 devices and eSATA storage, and USB 3.0 + Gigabit Ethernet Thunderbolt Adapter for easy... Read more
Apple restocks refurbished 27-inch 5K iMacs f...
The Apple Store has restocked Apple Certified Refurbished 27″ 3.5GHz 5K iMacs for $2119 including free shipping. Their price is $380 off the cost of new models, and it’s the lowest price available... Read more
Free Clean Reader Mobile App Hides Swear Word...
The new Clean Reader app, now available in the Apple App Store and Google Play, delivers the opportunity of reading any book without being exposed to profanity. By selecting how clean they want their... Read more
Kinsa Launches “Groups” App to Monitor Illnes...
Kinsa, makers of the first FDA approved app-enabled smartphone thermometer thst won the 2013 Cleveland Clinic Medical Innovation Grand Prize and recently appeared in Apple’s “Parenthood” TV... Read more
iPad: A More Positive Outlook – The ‘Book Mys...
It’s good to hear someone saying positive things about the iPad. I’ve been trying to bend my mind around how Apple’s tablet could have gone from zero to bestselling personal computing device on the... Read more
Mac Pros on sale for up to $279 off MSRP
Amazon has Mac Pros in stock and on sale for up to $279 off MSRP. Shipping is free: - 4-Core Mac Pro: $2725.87, $273 off MSRP (9%) - 6-Core Mac Pro: $3719.99, $279 off MSRP (7%) Read more
Sale! 13-inch Retina MacBook Pros for up to $...
B&H Photo has 13″ Retina MacBook Pros on sale for up to $205 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 13″ 2.6GHz/128GB Retina MacBook Pro: $1219.99 save $80 - 13″ 2.... Read more

Jobs Board

*Apple* Retail - Multiple Positions (US) - A...
Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, you're also the Read more
*Apple* Solutions Consultant - Retail Sales...
**Job Summary** As an Apple Solutions Consultant (ASC) you are the link between our customers and our products. Your role is to drive the Apple business in a retail Read more
Position Opening at *Apple* - Apple (United...
…Summary** As a Specialist, you help create the energy and excitement around Apple products, providing the right solutions and getting products into customers' hands. You Read more
Position Opening at *Apple* - Apple (United...
**Job Summary** The Apple Store is a retail environment like no other - uniquely focused on delivering amazing customer experiences. As an Expert, you introduce people Read more
*Apple* Solutions Consultant - Retail Sales...
**Job Summary** As an Apple Solutions Consultant (ASC) you are the link between our customers and our products. Your role is to drive the Apple business in a retail Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.