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Glossary:
- Filled Rect
- This button draws a rectangle whose interior is filled by the color of the
crayon. The upper left-hand corner of the rectangle is located at the
position of the crayon. The rectangle's width is given by Equation 1
(the coefficients in the first column), and the rectangle's height is given
by the second equation (the coefficients in the second column).
- Framed Rect
- This button draws a rectangle with a white interior. The upper left-hand corner of the rectangle is located at the
position of the crayon. The rectangle's width is given by Equation 1
(the coefficients in the first column), and the rectangle's height is given
by the second equation (the coefficients in the second column).
- Filled Oval
- This button draws a oval whose interior is filled by the color of the
crayon. The upper left-hand corner of the oval is located at the
position of the crayon. The oval's width is given by Equation 1
(the coefficients in the first column), and the oval's height is given
by the second equation (the coefficients in the second column).
- Framed Oval
- This button draws a oval with a white interior. The upper left-hand corner of the oval is located at the
position of the crayon. The oval's width is given by Equation 1
(the coefficients in the first column), and the oval's height is given
by the second equation (the coefficients in the second column).
- Filled Arc
- This button draws a arc whose interior is filled by the color of the
crayon. The upper left-hand corner of the arc is located at the
position of the crayon. The arc's width is given by Equation 1
(the coefficients in the first column), and the arc's height is given
by the second equation (the coefficients in the second column). The
angle at which the arc starts is given by Eq 3 (the coefficients in the
third column), and the size of the angle through which the arc is drawn
is given by Eq 4 (the coefficients in the fourth column).
- Framed Arc
- This button draws a arc with a white interior. The upper left-hand corner of the arc is located at the
position of the crayon. The arc's width is given by Equation 1
(the coefficients in the first column), and the arc's height is given
by the second equation (the coefficients in the second column). The
angle at which the arc starts is given by Eq 3 (the coefficients in the
third column), and the size of the angle through which the arc is drawn
is given by Eq 4 (the coefficients in the fourth column).
- 3D Rect Up
- This button draws a raised 3D rectangle. Unfortunately, it is very hard to
see the 3D effect. Try drawing this rectangle in a color other than black.
The upper left-hand corner of the rectangle is located at the
position of the crayon. The rectangle's width is given by Equation 1
(the coefficients in the first column), and the rectangle's height is given
by the second equation (the coefficients in the second column).
- 3D Rect Down
- This button draws a depressed 3D rectangle. Unfortunately, it is very hard to
see the 3D effect. Try drawing this rectangle in a color other than black.
The upper left-hand corner of the rectangle is located at the
position of the crayon. The rectangle's width is given by Equation 1
(the coefficients in the first column), and the rectangle's height is given
by the second equation (the coefficients in the second column).
- Left
- This button changes the crayon's direction to the left by the angle given
by Equation 1 (the coefficients in the first column).
- Right
- This button changes the crayon's direction to the right by the angle given
by Equation 1 (the coefficients in the first column).
- Save
- This button saves the crayon's position and direction into a stack. Up to
ten different crayon states can be saved.
- Restore
- This button restores the crayon's position and direction to a previously
saved state. Since the crayon's states are stored in a stack, the states
are stored in the reverse order in which they were saved. Pressing the
restore button without saving any crayon states restores the crayon to its
starting position and direction
- Line
- This button draws a line whose length is given by Equation 1 (the
coefficients in the first column). The line is drawn in the direction in
which the crayon points. The line's starting point is the
current position of the crayon. The crayon's new position is the ending
point of the line.
- Jump
- This button moves the crayon by a distance is given by Equation 1 (the
coefficients in the first column). The crayon is moved in the direction in
which the crayon points.
- LineTo
- This button draws a line whose starting point is the current position of
the crayon. The x-coordinate of the ending point is given by Eq 1, and
the y-coordinate of the ending point is given by Eq 2. The crayon's new position
is the ending point of the line. The crayon's direction remains unchanged.
- JumpTo
- This button moves the crayon to a point whose x-coordinate is given by Eq 1, and
y-coordinate is given by Eq 2. The crayon's direction remains unchanged.
- A B C D
- These are procedure buttons. Pressing this button the first time allows one to
assign a group of commands to this button. The procedure's definition is closed
by pressing the } button. Pressing the procedure button afterwards tells ProgArt
to execute the group of commands within the procedure. One cannot define a procedure
within another procedure or within a repeat loop.
- Fractal
- This button draws an l-fractal. This command takes three arguments. The first
argument is the procedure -- A, B, C, or D -- which contains the list of graphical
commands which will be used in the fractal. The second argument is the name of the
graphical command within the procedure which will be recursively replaced by the list
of commands in the procedure. The third argument is a number which indicates the
number of times this recursion will occur. To specify the arguments after pressing
the fractal button, press the A, B, C, or D button to indicate the first argument;
then press the button representing the command which you would like recursively
replaced. The third argument will automatically come from the value in the Interval
field of Eq 1 (the first column). The fractal command cannot be used unless a
procedure is at first defined. Keep the third argument small, because large values
can create long drawing times.
- Repeat
- This button opens a Repeat loop. A Repeat loop executes the commands found within
the loop the number of times indicated by its argument. The argument for the Repeat
loop is given by the interval text field of Eq 1 (Column 1). Pree the } button
to close the repeat loop. Repeat loops can be nested. Up to ten Repeat loops can
be nested together.
- }
- This button closes an open Repeat loop or procedure definition. Everytime you open
a Repeat loop or a Procedure definition, you must close it by pressing this button.
- Color
- This button changes the color of the crayon. Objects drawn after this command is
called will be drawn in that color. This command has three arguments which specifies
the amount of red, green, and blue in the new color. The arguments can range in value
from 0 to 255. The red component is specified by Equation 1 (the coefficients in the
first column). The green component is specified by Equation 2 (the coefficients in
the second column), and the blue component is specified by Equation 2 (the
coefficients in the third column).
- Draw
- This button draws a new picture by executing the commands in the program window.
This button will execute only if all loops and definitions are closed.
- Stop
- This button does nothing at the present time
- Erase
- This button erases both the program from the program window and the drawing from
the drawing window.
- Filled RR
- This button draws a rounded rectangle whose interior is filled by the color of the
crayon. The upper left-hand corner of the rectangle is located at the
position of the crayon. The rectangle's width is given by Equation 1
(the coefficients in the first column), and the rectangle's height is given
by the second equation (the coefficients in the second column). The width of the
rectangle used to round the corners is given by Eq 3 (the coefficients in the third column),
and the height of the rectangle used to round the corners is given by Eq 4
(the coefficients in the fourth column).
- Eq 1, Eq 2, Eq 3, Eq 4
- These buttons change the type of equation each column of coefficients represents.
There are four possible types: Linear (Ax+B), Quadratic (Ax^2 + Bx + C), Sinusoidal
(A + BsinC(x+D)), and Random[A, B] where A and B represents the range in which the
random number can appear.
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