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Hi, I'm interested in creating the simplest code for downloading a picture which is in a "constant" internet address and saving it in disk. An example w'd be to save the picture http://waves.terra.com.br/forecast/grafico_ondas_santos.gif which is updated every day. tks

That w'd be great!

Hi: I want to build a project in which there is a field where the user put an mathematical expression. Then I want to use this expression to make some calculations. As an example the user would type the expression cos(x*x) and the code would draw the graph of the function typed. Tks a lot.

Hi, lastcyborg: I was off my activities in programming but I'm still interested in that application you mentioned. Do you still have it? Sorry for so long...

Ok, guys: What I want is a simple program presentation, but I'd like it to be nice... I think I'm going to start by drawing simple objects with canvas. With time I'm going to check the open GL. However I need an relatively easy start. Can you recommend any site or online tutorial or whatever...

Hi, people: First, thanks a lot for your help I really need to make all the calculations simultaneously with the calculations, just because my final interest is making animations which don’t have any periodicity, (so called chaotic). The calculations are ready I have the equations and the angles...

Hi, I'd like any suggestions about the best form of creating an animation with a simple figure, for example, a pendulum. Is it possible to load an image of a simple pendulum and after some calculation of its angle, rotate the image to produce the animation? Is a simpler way to do this? Thanks a lot.

Hi there: I'm trying to plot some xy charts using the Canvas of a TImage, changing some pixels color. Does somebody know if it is possible to refresh the image so that I can see the points being plotted one by one? Tks

Hello: The transformation you need to do is simple: The value of the angle in degrees is equal to the angle in radians multiplied by 180 and divided by PI. Deg=rad*180.0/PI() Maybe you can define a constant 180.0/PI() and just do the operation when you need the angle in degrees. The way you...

Thanks, Bong, I forgot reseting some graphical variables. I'll have a look in BLT also.

I have just started with tcl/tk and I've been trying to develop a simple routine to plot xy points in a file created by a c++ program. I created a list of entry widgets that pass the pararameters for the c++ program. This one saves the list of xy points in a file and and the points are read and...