Digital Workshop

Hi Everyone,

Has anyone used OpusScript to draw a pie chart with different segments?



Thanks

Just for anyone doing bar charts, this is the code for doing a horizontal bar chart:

On Show:


On Var Change - BarChartOne:


The frame Frame_HorBar is 300 wide by 30 high. That is the reason BarChartOne is multiplied by 3, to fill it as percent.

Imc,
...an interesting challenge. Of course, there could be some clever ways to do this with scripting of the draw command. But that seems like heavy-lifting work to me.

For a limited scope of graphing, you could do cloning and some layered masking (e.g., using rotated frames to create the boundaries.).

But if your goal is simple enough, look at using Opus' built-in Borders (segments) Maybe you can achieve something useful with those. A little more definition of the goal and what you are working with will help attract answers.

Thanks Lar,

It would be for pulling data from a database or from online and displaying it on a pie chart with multiple segments in different colours, their size dynamic and dependent on the variables, also range of segments would range from 2 to 12.

Using the drawing tools I can draw circles, and lines, but getting it to draw arc segments is proving a challenge.




Thanks

There's a built-in example of a bar chart in Opus' exemplars.

As for drawing a pie chart, I don't see why not. You'd probably have to draw it manually as I think the ellipse function doesn't allow you to specify the size of the segment. Look at using polar co-ordinates.

Alternatively, to do it without mathematics, you could create the segments in a graphics or vector application and simply clone them with appropriate rotation. Or perhaps just a single 1° line that is cloned and rotated x times for each segment might work.

Mack

Here's a pie graph made by cloning and rotating a line around a point. Made it back in 2005
The black square with a hole in it is a mask that hides the rough edges of the circle. The line under the mask is only there for testing purposes. Move it off screen when using. Change the colour of the mask to match the background.

You could probably use circle sectors instead of lines; then control layering and rotation overlap to give the correct pie appearance...

cheers
Paul