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How to draw curve from point to point with canvas ? I also would like to know how to draw sine wave and of course circle, and maybe sphere with gradient filling.

For wide circle, it seems you can't draw it with solid line...only with dotted line...
Here's the code if I'm not mistaken...

Code: Select all

int i,xx,yy,R=100;
erase(0,0,0,1);
for(i=0;i<360;i++)
{
    xx=cos(degtorad(i))*R;
    yy=sin(degtorad(i))*R;
    setpen(255,255,255,0,1);
    putpixel(width/2+xx,height/2+yy);
}

The circle looks... so, so, but the code is smart and I can't deny it is a circle, and what about just one curve line ? Is it possible to draw solid ?

You can make is smoother by adding another one, little bit larger and transparent circle under it.
Like this:

Code: Select all

int i, xx, yy, R = 100;
erase(0, 0, 0, 1);

for (i = 0; i < 360; i ++)
{
    xx = cos(degtorad(i)) * R;
    yy = sin(degtorad(i)) * R;
    setpen(255, 255, 255, 0.5, 4);
    putpixel(width / 2 + xx, height / 2 + yy);
}
for (i = 0; i < 360; i ++)
{
    xx = cos(degtorad(i)) * R;
    yy = sin(degtorad(i)) * R;
    setpen(255, 255, 255, 0, 2);
    putpixel(width / 2 + xx, height / 2 + yy);
}

Just edited Bee-Ant's code.

Kall's brother showed us a way of counting a circle path a whiles back, i just put that code in a canvas and you don't get a pixley one. But he wants a curved line so this doesn't help. Guess I'll make another one if i find time in the next couple of minutes

jimmynewguy wrote:Kall's brother

Kall's brother?you mean Kalladdolf's???
Who's he?

yea, you were in this discussion bee!
viewtopic.php?f=5&t=4600&hilit=counting+a+circle+path&start=15

jimmynewguy wrote:yea, you were in this discussion bee!
viewtopic.php?f=5&t=4600&hilit=counting+a+circle+path&start=15

Owh, what an old topic...no wonder I forgot it

lcl improved Bee - Ant's circle but Jimmy's looks better because it's clear but I probably can't get collision with that line so it's only visaul effect. The advantage of lcl's is that I can add physicall response with canvas. Thanks to you I know two ways to draw circle but I still don't know how to make a curve line from point to point. I need to know how to display by canvas lines with various curvature for my next game so I'm counting on you

Something like this???
http://dl.dropbox.com/u/3997355/Curve.ged

Well, basically you just need an array to store all the y point value.
Then connect them using moveto() and lineto()

Yeaaach!! Another point for Beeee - Aaant !

Thanks. Glad I could help