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List: vtk-developers
Subject: [vtk-developers] vtkXYPlotActor: ViewportToPlotCoordinate issue
From: Mathieu Coursolle <mcoursolle () rogue-research ! com>
Date: 2009-03-13 15:51:27
Message-ID: EAFC938B-A97C-4DF4-ABBF-13349E9BBA01 () rogue-research ! com
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[Attachment #2 (multipart/alternative)]
Hi VTK users/developers,
I am using vtkXYPlotActor and I need to convert mouse event position
into
plot position.
double coordinates[2] = {0.0, 0.0};
thePlot->SetViewportCoordinate(inX, inY);
thePlot->ViewportToPlotCoordinate(theRenderer);
thePlot->GetPlotCoordinate(coordinates);
I would except the previous code to work:
1) I set the viewport coordinates.
2) Convert to plot coordinates.
3) Retrieve the plot coordinates.
However, I stepped in the code and realized that
ViewportToPlotCoordinate(...)
sets the viewportCoordinates.
Am I missing something here?
If I read the viewportCoordinates, it returns the right value:
double coordinates[2] = {0.0, 0.0};
thePlot->SetViewportCoordinate(inX, inY);
thePlot->ViewportToPlotCoordinate(theRenderer);
thePlot->GetViewportCoordinate(coordinates);
Thanks,
Mathieu
____________________
Mathieu Coursolle, M.Ing.
Rogue Research Inc.
www.rogue-research.com
[Attachment #5 (text/html)]
<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; \
-webkit-line-break: after-white-space; "><div>Hi VTK \
users/developers,</div><div><br></div><div>I am using vtkXYPlotActor and I need to \
convert mouse event position into</div><div>plot \
position.</div><div><br></div><div><div style="margin-top: 0px; margin-right: 0px; \
margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Monaco; \
"><span style="color: #1046da">double</span> coordinates[2] = {0.0, 0.0};</div><div \
style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; \
font: normal normal normal 12px/normal Monaco; ">thePlot->SetViewportCoordinate(inX, \
inY);</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; \
margin-left: 0px; font: normal normal normal 12px/normal Monaco; \
">thePlot->ViewportToPlotCoordinate(theRenderer);</div><div style="margin-top: 0px; \
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal \
12px/normal Monaco; ">thePlot->GetPlotCoordinate(coordinates);</div></div><div><br></div><div>I \
would except the previous code to work:</div><div>1) I set the viewport \
coordinates.</div><div>2) Convert to plot coordinates.</div><div>3) Retrieve the plot \
coordinates.</div><div><br></div><div>However, I stepped in the code and realized \
that ViewportToPlotCoordinate(...)</div><div>sets the \
viewportCoordinates.</div><div><br></div><div>Am I missing something \
here?</div><div><br></div><div>If I read the viewportCoordinates, it returns the \
right value:</div><div><br></div><div><div style="margin-top: 0px; margin-right: 0px; \
margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Monaco; \
"><span style="color: rgb(16, 70, 218); ">double</span> coordinates[2] = {0.0, \
0.0};</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; \
margin-left: 0px; font: normal normal normal 12px/normal Monaco; \
">thePlot->SetViewportCoordinate(inX, inY);</div><div style="margin-top: 0px; \
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal \
12px/normal Monaco; ">thePlot->ViewportToPlotCoordinate(theRenderer);</div><div \
style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; \
font: normal normal normal 12px/normal Monaco; \
">thePlot->GetViewportCoordinate(coordinates);</div></div><div><br></div>Thanks,<div><br></div><div>Mathieu<br><div> \
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); \
font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; \
font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; \
text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; \
widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; \
-webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; \
-webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0; "><div \
style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: \
after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; \
color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; \
font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: \
normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; \
widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; \
-webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; \
-webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div \
style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: \
after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; \
color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; \
font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: \
normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; \
widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; \
-webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; \
-webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div \
style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: \
after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; \
color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; \
font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: \
normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; \
widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; \
-webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; \
-webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div \
style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: \
after-white-space; "><div>____________________ <br>Mathieu Coursolle, \
M.Ing.<span class="Apple-tab-span" style="white-space: pre; "> </span><br>Rogue \
Research Inc. </div><div><a \
href="http://www.rogue-research.com/">www.rogue-research.com</a><br></div><div><br></div><div><br></div></div></span><br \
class="Apple-interchange-newline"></div></span><br \
class="Apple-interchange-newline"></div></span><br \
class="Apple-interchange-newline"></div></span><br class="Apple-interchange-newline"> \
</div><br></div></body></html>
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