[overture] Re: Plot a Point
- From: "#DOMINIC DENVER JOHN CHANDAR#" <DOMI0002@xxxxxxxxxx>
- To: <overture@xxxxxxxxxxxxx>
- Date: Tue, 16 Jun 2009 23:54:46 +0800
Thanks Bill, It worked fine..
Dominic
-----Original Message-----
From: overture-bounce@xxxxxxxxxxxxx
[mailto:overture-bounce@xxxxxxxxxxxxx] On Behalf Of Bill Henshaw
Sent: Tuesday, June 16, 2009 10:51 PM
To: overture@xxxxxxxxxxxxx
Subject: [overture] Re: Plot a Point
hi Dominic,
You can use the plotPoints function to plot coloured points (or
spheres).
Here is an example. ...Bill
PlotStuff ps(true,"plot");
GraphicsParameters psp;
...
else if( answer=="plot points" || answer=="plot points with colour"
|| answer=="plot spheres with colour" )
{
const bool plotSpheres = answer=="plot spheres with colour";
const int n=plotSpheres ? 41 : 51;
const int m = plotSpheres ? 2 : 1;
realArray points(n,3), value(n,m);
for( int i=0; i<n; i++ )
{
real radius=i/(n+1.);
real theta=twoPi*i/(n+1.);
points(i,axis1)=cos(theta)*radius;
points(i,axis2)=sin(theta)*radius;
points(i,axis3)=cos(2.*theta)*radius;
value(i,0)=
SQR(points(i,axis1))+SQR(points(i,axis2))+SQR(points(i,axis3));
if( plotSpheres ) value(i,1)=.05; // radius for the sphere
}
psp.set(GI_POINT_SIZE,(real) 6.); // size in pixels
if( answer=="plot points" )
ps.plotPoints(points,psp);
else
ps.plotPoints(points,value,psp); // colour point i by value(i)
}
#DOMINIC DENVER JOHN CHANDAR# wrote:
> Hi,
>
> Is there a way to plot a point at a given location (x,y) using the
> plotStuff class ? or should I use the OpenGL functions ? Basically I
> have a contour plot plotted in a window and i want to plot points at
> different locations (also later with different colors)
>
> I tried something like :
>
> DataPointMapping map;
> map.setDataPoints( points, 1,1);
> MappedGrid mg(map);
> mg.update();
>
> here "points" is of dimension (1, 0:1). But this doesnt work.. I think
> we cannot generate a MappedGrid with just 1 point...?
>
> Any other ways ?
>
> Thanks,
> Dominic
>
>
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