yang686526

how to export hideline data
how to export hideline data
i抦 looking to export some hideline image data to an external file.
to accomplish this i think i would need to:
1) open a dwg/dxf file,
2) create the view (top, front, iso? we would like to see the object.
3) display the model in a viewport applying this view.
4) trigger the viewport to display in hideline mode.
5) evaluate the viewports data for export to our file.
i have been successful with steps 1-3 using the included examples, i have played around with the vectorize example, but have been unable to accomplish steps 4 and 5. could you provide me with a basic outline (function calls) of the steps to do this.
thanks,
tom
additional info
to clearify
i have made a small change to the vectorize example by inserting a call to set the views mode to khiddenline
code:
/****************************************************/
/* prepare the device to render the active layout in */
/* this database. */
/****************************************************/
pdevice = oddbgsmanager::setupactivelayoutviews(pdevice, pdwgcontext);
pdevice->viewat(1)->setmode(odgsview::khiddenline);
/***************************************************/
/* set the screen size for the generated (vectorized) geometry. */
/***************************************************/
odgsdcrect screenrect(odgsdcpoint(0, 0), odgsdcpoint(1000, 1000));
pdevice->onsize(screenrect);
/******************************************************/
/* initiate vectorization */
/***************************************************/
pdevice->update();when i look at the output dump file for the run without this change (2cube_start_dump.txt) all of the edge information is included as i expected. however when i add the call to set the mode to hiddenline. the output dump file (2cube_hiddenline_dump.txt) the format is changed but all of the edges are listed, i was expecting just the (14) clipped and visible edges (see 2cube-hiddenline.jpg)
1)(408.2,813.0,0.0) to (662.8,666.0,207.9)
2)(662.8,666.0,207.9) to (535.5,592.5,311.9)
3)(535.5,592.5,311.9) to (280.9,739.5,104.0)
4)(280.9,739.5,104.0) to (408.2,813.0,0.0)
5)(280.9,298.4,-207.9) to (535.5,151.4,0.0)
6)(535.5,151.4,0.0) to (662.8,224.9,-104.0)
7)(280.9,298.4,-207.9) to (280.9,739.5,104.0)
8)(535.5,151.4,0.0) to (535.5,592.5,311.9)
9)(662.8,224.9,-104.0) to (662.8,666.0,207.9)
10)(280.9,298.4,-207.9) to (153.6,371.9,-311.9)
11)(153.6,371.9,-311.9) to (153.6,445.5,-259.9)
12)(153.6,445.5,-259.9) to (280.9,372.0,-155.9)
13)(153.6,445.5,-259.9) to (153.6,445.5,-259.9)
14)(153.6,445.5,-259.9) to ~(280.9,445.4,-259.8) (clipped by front cube)
it occurred to me that this is the geometry that is processed by the view, but the data i'm looking for is the primitive graphics to be displayed after the hiddenline processing. can you point me to where i can access this data?
thanks,
tom
attached images (199.7 kb, 3 views)
attached files (41.5 kb, 3 views)
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you may look at exports\2dexport\source\2dexportdevice.cpp
and search all string containing "hlr" (short for "hidden line removal")
vladimir
i'm still not finding the output primatives? is there a sample using the 2dexportdevice.cpp i can debug thru?
tom
2dexportdevice.cpp is used e.g. in svg export. you may add the corresponding project (projectfiles\win32\msvc8\exports\svgdll\dd_svgexp ort_dll.vcproj ) to allexamplesdll solution, set breakpoint, run odamfcappdll sample, open some file and call file/svg export command.
vladimir

thank you, i'm now able to step thru the code as the data is exported.
to get back to my original question, how do i now get the exported svg file to only contain the visible lines after hide line removal - hlr? i loaded the 2cube file into the odmfcapp and set the active viewport to model (the active vectorizer is windirectx) then i select the file->export to svg option. unfortunately the output file is the entire image without any hidden line removal.
i have enclosed an image of the 2cube in the odmfcapp(odamfcapp_2cube sreen showing modelspace.jpg) - this is the desired output
also enclosed is a screen shot showing the exported svg file (2cube_svg file create by export.jpg).
and below i have also copied the text from the 2cube.svg file.
am i missing a step in the odmfcapp to get only the hlr data to export???
tom
code:
<?xml version="1.0" standalone="no"?>
<defs >
<clippath id="clipid0" >
<path d="m96,820 673,820 673,243 96,243 z" />
</clippath>
<clippath id="clipid1" >
<path d="m0,1024 768,1024 768,0 0,0 z" />
</clippath>
</defs>
<image width="1" height="1" xlink:href="t:\tom/image0.png" transform="matrix(768 0 0 1024 0 1.13687e-013)" />
<image width="1" height="1" xlink:href="t:\tom/image1.png" transform="matrix(768 0 0 1024 0 1.13687e-013)" />
<g stroke-width="0.1" clip-path="url(#clipid0)" fill="none" stroke="rgb(0,0,0)" />
<g stroke-width="0.25" clip-path="url(#clipid0)" fill="none" stroke="rgb(255,0,0)" >
<polyline points="509.075,403.609 313.486,290.685 " />
<polyline points="313.486,629.455 509.075,742.378 " />
<polyline points="313.486,290.685 215.692,347.147 " />
<polyline points="411.281,460.07 509.075,403.609 " />
<polyline points="411.281,460.07 411.281,798.84 " />
<polyline points="509.075,742.378 411.281,798.84 " />
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</g>
<g stroke-width="0.1" clip-path="url(#clipid1)" fill="none" stroke="rgb(0,0,0)" >
<polyline points="95.5667,819.574 95.5667,242.585 672.557,242.585 672.557,819.574 95.5667,819.574 " />
</g>
you did not attach the file.
which dd version do you use?
(in old versions hlr was turned off, look at the command line in codamfcappdoc:nexportsvg() there should be "yes" at the end, after numbers)
i quote my resulting svg, from the attached file (with 3d hidden viewport visual style)
code:
<?xml version="1.0" standalone="no"?>
<defs >
<clippath id="clipid0" >
<path d="m0,768 1024,768 1024,0 0,0 z" />
</clippath>
<clippath id="clipid1" >
<path d="m146,763 879,763 879,30 146,30 z" />
</clippath>
<clippath id="clipid2" >
<path d="m0,768 1024,768 1024,0 0,0 z" />
</clippath>
</defs>
<g stroke-width="0.1" clip-path="url(#clipid0)" fill="none" stroke="rgb(0,0,0)" />
<g stroke-width="0.1" clip-path="url(#clipid1)" fill="none" stroke="rgb(0,0,0)" />
<g stroke-width="0.25" clip-path="url(#clipid1)" fill="none" stroke="rgb(255,0,0)" >
<polyline points="298.195,163.119 372.733,120.085 " />
<polyline points="298.195,163.119 372.733,206.154 " />
<polyline points="298.195,163.119 298.195,220.499 " />
<polyline points="298.195,163.119 372.733,206.154 " />
<polyline points="298.195,220.499 298.195,163.119 " />
<polyline points="298.195,163.119 372.733,120.085 " />
<polyline points="422.425,91.3951 472.117,120.085 " />
<polyline points="372.733,120.085 422.425,91.3951 " />
<polyline points="372.733,206.154 397.579,220.499 " />
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<polyline points="372.733,120.085 422.425,91.3951 " />
<polyline points="422.425,91.3951 472.117,120.085 " />
<polyline points="472.117,120.085 571.501,177.464 " />
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<polyline points="571.501,177.464 646.039,220.499 " />
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<polyline points="298.195,220.499 298.195,349.602 " />
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<polyline points="397.579,220.499 472.117,263.533 " />
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<polyline points="546.655,306.568 571.501,292.223 " />
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<polyline points="546.655,306.568 571.501,292.223 " />
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<polyline points="571.501,292.223 670.885,234.844 " />
<polyline points="646.039,220.499 670.885,234.844 " />
<polyline points="670.885,349.602 670.885,234.844 " />
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</g>
<g stroke-width="0.1" clip-path="url(#clipid2)" fill="none" stroke="rgb(0,0,0)" >
<polyline points="145.598,763.252 145.598,30.2919 878.559,30.2919 878.559,763.252 145.598,763.252 " />
</g>
</svg>attached files (386.9 kb, 2 views)

vladimir

thanks, now the output is correct.
i believe i'm using v2.5.1.0
i'm not sure if this is a bug, but in addition to looking at the svg files i was reviewing the dwf output files, and they appear to be flipped (see 2cube1 output to dwf.jpg). i have enclosed some output dwf file created from the 2cube1.dwg file.
tom
attached images (193.6 kb, 0 views)
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afaik it was fixed in 2.5.2
vladimir