CONTENTS

Menu Commands

Keyboard Shortcuts

Using the Toolbar

Using the Mouse

About...


Menu Commands

This section contains information about the menu commands in Triangle Illusion.

File Menu

View Menu

Help Menu


File Menu

This section contains information about File Menu commands in Triangle Illusion.

New (CTRL+N)

Clears the drawing area for a new image. You must specify the tile size for the new image.

Open (CTRL+O)

Opens a saved image. The default extension for image files is TIL.

Save (CTRL+S)

Saves the image as a TIL file using its current name. If you are saving the image for the first time, you must specify a file name.

Save as Tile Image

Asks for a file name and then saves the image as a TIL file.

Save as Bitmap

Asks for a file name and then saves the image as a Windows™ BMP file. You can later use this file with other paint programs but you cannot open it with Triangle Illusion.

Exit (CTRL+X)

Quits Triangle Illusion and returns to Windows™.


View Menu

This section contains information about View Menu commands in Triangle Illusion.

Redraw (CTRL+R)

If the image seems to contain undesired lines and dots, you can try this command.

Change Tile Size

Opens up a dialog box that you can use to change the size of the triangles. Equilateral, isosceles and right triangles produce nice results.

Display Grid

By choosing this item, you can turn the grid on or off.

Display Cursor

By choosing this item, you can turn the cursor on or off.


Help Menu

This section contains information about Help Menu commands in Triangle Illusion.

Help Topics (F1)

Brings up Help Contents.

About Triangle Illusion

In case you wonder who could have spared time to write such a USEFUL! program.


Keyboard Shortcuts

The following keyboard shortcuts can be used in Triangle Illusion.

CTRL-N	Creates a new tile image
CTRL-O	Opens an existing tile image
CTRL-S	Saves the current tile image
CTRL-X	Quits Triangle Illusion
CTRL-R	Redraws the image
F1	Brings up Help Contents


Using the Mouse

Example

The cursor will follow your mouse pointer. To place a tile, first make sure that you have selected it on the toolbar and then click the left mouse button on the drawing area. You can only place tiles if their orientation is the same as the cursor's. Successive clicks on the same area will put tiles on top of each other with the last tile on top. Think of tiles as if they are transparent.

To remove a single tile from layers of tiles, select, on the toolbar, the tile you want to delete. Then click the right mouse button on the drawing area. To remove all the tiles from all the layers, you should select the rightmost tile on the toolbar (the empty one), and click the left mouse button on the drawing area.


Tile and Layer Example

Note that the order you place tiles is important! The last tile you place is on the top!


Toolbar
Using the Toolbar

The toolbar consists of three sections.

Click on any triangle to select the shape of your tile "brush". Be aware that you cannot place tiles arbitrarily; the tiles' orientation must be correct. Use the rightmost tile for erasing.

Use the appropriate button to scroll the image left, right, up, or down by one tile. The drawing area will wrap around at "some" point depending on the size of your tiles.

Use the first three boxes to change the color of the tiles and the last box to change the background color. Unfortunately, the color of the toolbar will remain the same regardless of the tile colors you select! Don't get confused!


Tile Size Dialog

v1 You can use the mouse to select and drag this vertex arbitrarily within the bounding area.

v2 You can use the mouse to select and drag this vertex horizontally.


About...

Copyright ©1996 by B. Cenk GAZEN & M. Burçin KERMEN

We got the idea from the book:

The Eye Beguiled, Optical Illusions by Bruno Ernst

The design of the tiles was first done by Diego Uribe.

If you like this program and wish to contribute to the development of similar programs, send $10 to:

B. Cenk GAZEN

Helena Apts. #18

1220 W. 28th. St.

Los Angeles, CA 90007

Feel free to send your comments and suggestions to:

gazen@usc.edu

kermenm@boun.edu.tr