Oberon Function Visualizer script
Note: a new much more advanced Oberon Function Visualizer is now available for CorelDRAW 10 and 11.
Use Oberon Function Visualizer script to create graphs of functions. You can enter a function in symbolic interpretation and the script will evaluate it and build a graph. You can use the following components to build the function body:
- Numeric constants
- Any number like 2, 6.9, -76.67. You can also use PI for 3.1415926... and E for 2.7182818...
- One of the following operators:
- + (addition), - (subtraction), * (multiplication), / (division), ^ (power)
- Parameter
- Use T keyword to represent the parameter of the function. This parameter is then varied in the range specified in T Range control group in the dialog (see below)
- Functions
- One of the following functions:
SIN - Sine
COS - Cosine
TAN - Tangent
SQR - Square root
LOG - base-10 logarithm
LN - natural logarithm
EXP - exponent (e raised to the given power) - Parentheses
- Use parentheses to control function evaluation order
When the graph is build a predefined variable T runs through values from From to To with the step of Step specified in T Range controls of the dialog.
Each current coordinate is calculated as follows:
y=f1(t)
x=f2(t)
Where f1 and f2 are defined by user. To draw a simple charts like y=sin(x) just define:
y=sin(t)
x=t
The script checks for correct syntax as you type the formulae and displays warnings in the status bar at the bottom of dialog.
You can use expressions in T Range controls either however all parameters here must be constants. When you type the range value, the status bar displays the current value entered. For example, entering "sin(pi/2)/2" in From field will result in value of 0.5 as displayed in the status bar immediately...
Screenshot of the Oberon Function Visualizer main dialog:
Live preview feature is based on my new User Interface Extension Run-Time Library for CorelSCRIPT which allows you paint in the dialog boxes. This new technology will be available to public as soon as I finish it.
Here are some examples of graphs built with this script:
| Y=SIN(T) X=T T: From= -2*pi, To= 2*pi |
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| Y=(sin(t)^2)*sin(20*t) X=T T: From= -2*pi, To= 2*pi |
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| Y=sin(t) X=cos(t) T: From= 0, To= 2*pi |
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| Y=sin(t)*t X=cos(t)*t T: From= 0, To= 2*pi |
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| Y=sin(t) X=cos(t)+t/pi T: From= -4*pi, To= 4*pi |
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Download Oberon Function Visualizer script for CorelDRAW 8:
- Plot8.zip (26K)
CorelDRAW 9 script is available here.
CorelDRAW 10/11 macro is here.