GSo C-Sine wave 2  (2010-Apr-17 13:02 EDT)

by <>  (2010-Sep-03 7:42 EDT)

This is another great example of a sine wave and how it relates to vectors. Even though there are other projects, I do think that an explanation would be helpful, especially for those who have never seen etoys before. For example, users have to know to click on the clock to get it started. Nice project!

by <>  (2010-Sep-03 7:42 EDT)

Good, good.

I feel that moving the blue vector along the axis is a bit confusing. What if somebody wants to show the relationship of cos and sin on the same graph?

by <>  (2010-Sep-03 7:42 EDT)

Thanks for the comments!

I think it would be good to add some explanation about the project but it never came to my mind that some user watching the squeakland showcase wouldn't know how to start a script. It's possible, though.

Regarding the blue vector, I thought that making it move across the axis will make it easier to understand... I guess I was wrong. Also I tried to make the example using only one graph, I don't know how would I do it without the moving vector.
As for the relationship between sin and cos, I tried to make the graph able to plot only one function at a time (that's the reason why all points share the same color BTW). Your version of the VectorFun project made me realize I failed in that too :P

by <>  (2010-Sep-03 7:42 EDT)

In regards to adding explanations, I personally think that there is no need for adding such redundant explanation to every single projects. I hope that people who are concerned about the documentation improve other people's projects by putting nicer explanation that makes sense to them.

In regards to moving the vector along, it may be just having a horizontal line to say green one is a projection onto y-axis from blue one. (I probably should do it to my project as well.)

BTW, if you can make the graph a kind of PasteUpMorph so that vectors and all of these things can draw pen trace, that would be useful...