Hi Randy,
The rectangle is drawn, not filled. Unfortunately I don't understand
what do you mean. Can you give me an example or describe it more
clear?
On 18.4.2013 16:32, Randy Hudson wrote:
Floor is used only
because otherwise casting
0.9 and -0.9 to an int would give you the same number. For
positive
values, it isn't doing anything.
Are you filling or drawing the
rectangle?
-Randy
Hi Jan,
you are right, what you are facing here is one of
the
several inconsistencies within the current Draw2d geometry API,
and one
of the reasons we started to build a new one in GEF4. You would
actually
have to switch to integer-based precision when performing the
calculation
of the drawing position (i.e. y = line.y() - rect.height()) for
the rectangle.
I agree that in general rounding would probably lead to better
results,
so that's what we will do when rendering GEF4 geometries (which
are completely
based on double-precision) within a GEF4 Graphics.
Cheers
Alexander
Am 17.04.2013 um 12:16 schrieb Jan Krakora <jan.krakora.cz@xxxxxxxxx>:
Hi all,
since the GEF forum is basically dead I would like to ask you
here. Why
is used Math.floor in all Precision* classes?
Let me give you an example:
First of all, I use PrecisionPoint, PrecisionRectangle,
PrecisionDimension
everywhere.
So there is a line with y coordinate 31.14. You have a rectangle
with height
18.315 that you would like to draw exactly above the line
so its bottom edge overlaps the line. But since the converting
from double
to int is done using Math.floor the coordinates
are as such:
the line:
y: 31.14 -> 31
the rectangle
y: 31.14 - 18.315 = 12.825 -> 12
height: 18.315 -> 18
As you can see the rectangle will be rendered above the line.
They don't
overlap. Why aren't double coordinates rounded?
Do I compute the y of the rectangle in wrong way?
Thanks, Jan Krakora.
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