View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0023191 | Open CASCADE | OCCT:Visualization | public | 2012-06-05 15:02 | 2014-11-11 12:57 |
| Reporter | kgv | Assigned To | bugmaster | ||
| Priority | normal | Severity | minor | ||
| Status | closed | Resolution | fixed | ||
| Product Version | 6.5.3 | ||||
| Target Version | 6.8.0 | Fixed in Version | 6.8.0 | ||
| Summary | 0023191: Visualization - small objects displayed with visual artifacts | ||||
| Description | Trivial interactive object displayed with serious visual artifacts without sanity reason. The reason is probably very rude value used for Z-fit. | ||||
| Steps To Reproduce | Original test case:pload VISUALIZATION MODELING restore w:/irons.brep i explode i ttranslate i_1 0.005 0 0 vinit View1 vclear vsetdispmode 1 vdisplay i i_1 vfit Localized: pload VISUALIZATION MODELING restore w:/irons.brep i explode i explode i_2 F compound i_2_1 i_2_4 i_2_5 i2 compound i_2_2 i_2_3 i3 ttranslate i_2 0.003 0 0 ttranslate i2 0.006 0 0 ttranslate i3 0.006 0 0 vinit View1 vclear vsetdispmode 1 vdisplay i_2 i2 i3 vsetcolor i3 RED vbottom vfit | ||||
| Tags | No tags attached. | ||||
| Test case number | bugs vis(004) bug23191 | ||||
| related to | 0024539 | closed | bugmaster | Open CASCADE | Visualization (new camera) - small objects displayed with visual artifacts |
| related to | 0024413 | closed | Open CASCADE | Visualization - get rid of projection shift from orthographic camera definition | |
| related to | 0024521 | closed | bugmaster | Open CASCADE | Visualization - automatic back face culling is not turned on for Solids packed into compound |
|
|
wedges_compound.png (3,870 bytes) |
|
|
wedges_exploded.png (3,218 bytes) |
|
|
Original shapes have been lost - should be re-created. |
|
|
irons.brep (17,847 bytes) |
|
|
The actual artifacts caused by rough Z fit range computation - should be checked on #0024001 branch. The difference between compound / not compound is caused by back face culling mechanism which is turned on automatically for closed shapes. However mechanism is incomplete and works only when root shape has closed flag, see StdPrs_ShadedShape, ShadeFromShape():
if (!theDrawer->ShadingAspectGlobal())
{
Handle(Graphic3d_AspectFillArea3d) anAsp = theDrawer->ShadingAspect()->Aspect();
if (StdPrs_ToolShadedShape::IsClosed (theShape))
{
anAsp->SuppressBackFace();
}
else
{
anAsp->AllowBackFace();
}
thus this check fails when closed shapes are stored in compound, or if displayed Solid without closed flag (for example - command "box" produces Solid without Closed flag, which contains Shell with Closed flag). |
|
|
Apart from z-fighting artifacts elimination (between back/front faces, noticeable on solid boundaries), back face culling affects performance as well. Testing on Solid with 710784 triangles. Without culling: FPS: 14.781480904813739 CPU: 14.664094000000034 msec with culling: FPS: 24.5940756343402 CPU: 9.6720619999999258 msec |
|
|
Behavior becomes worse on current patch for #0024001 issue. |
|
|
Dear bugmaster, the original problem seems to be resolved by 0024413. Please add localized test case to data base and switch to tested. |
|
|
zart_671.png (2,518 bytes) |
|
|
zart_master.png (2,310 bytes) |
|
|
Branch CR23191 has been created by mkv. SHA-1: 7ed22e71e0aff451947ec413b883a88ba7dcb781 |
|
|
Branch CR23191 has been updated by mkv. SHA-1: 99d754d41ddfc801b16c31212f0117c0dc23067d |
|
|
Dear BugMaster, Test case bugs/vis(004)/bug23191 was pushed to new branch CR23191 in occt git-repository. SHA-1: 99d754d41ddfc801b16c31212f0117c0dc23067d |
|
|
Branch CR23191 has been deleted by inv. SHA-1: 99d754d41ddfc801b16c31212f0117c0dc23067d |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2012-06-05 15:02 | kgv | New Issue | |
| 2012-06-05 15:02 | kgv | Assigned To | => san |
| 2012-06-05 15:05 | kgv | File Added: wedges_compound.png | |
| 2012-06-05 15:05 | kgv | File Added: wedges_exploded.png | |
| 2012-10-21 10:55 |
|
Target Version | 6.5.4 => 6.6.0 |
| 2013-02-26 18:45 |
|
Target Version | 6.6.0 => 6.7.0 |
| 2013-10-24 13:18 | kgv | Note Added: 0026254 | |
| 2013-10-24 13:18 | kgv | Assigned To | san => kgv |
| 2013-10-24 13:18 | kgv | Status | new => feedback |
| 2013-10-24 13:18 | kgv | Target Version | 6.7.0 => 6.7.1 |
| 2014-01-08 18:05 | kgv | File Added: irons.brep | |
| 2014-01-08 18:06 | kgv | Steps to Reproduce Updated | |
| 2014-01-08 18:06 | kgv | Status | feedback => assigned |
| 2014-01-09 08:53 | kgv | Note Added: 0027401 | |
| 2014-01-09 08:58 | kgv | Note Added: 0027402 | |
| 2014-01-09 11:14 | kgv | Relationship added | related to 0024521 |
| 2014-01-09 17:40 | kgv | Note Added: 0027424 | |
| 2014-01-09 17:40 | kgv | Assigned To | kgv => duv |
| 2014-01-16 09:41 | kgv | Summary | Wedges compound displayed with serious visual artifacts => Visualization - small objects displayed with visual artifacts |
| 2014-01-20 09:55 | kgv | Relationship added | related to 0024539 |
| 2014-04-04 18:16 |
|
Target Version | 6.7.1 => 6.8.0 |
| 2014-07-09 14:29 | kgv | Note Added: 0030031 | |
| 2014-07-09 14:29 | kgv | Assigned To | duv => bugmaster |
| 2014-07-09 14:29 | kgv | Status | assigned => feedback |
| 2014-07-09 14:29 | kgv | Steps to Reproduce Updated | |
| 2014-07-09 14:30 | kgv | File Added: zart_671.png | |
| 2014-07-09 14:30 | kgv | File Added: zart_master.png | |
| 2014-07-09 14:31 | kgv | Relationship added | related to 0024413 |
| 2014-07-10 10:37 | bugmaster | Assigned To | bugmaster => mkv |
| 2014-07-16 14:23 | git | Note Added: 0030193 | |
| 2014-07-16 15:09 | git | Note Added: 0030196 | |
| 2014-07-16 15:16 |
|
Note Added: 0030199 | |
| 2014-07-16 15:17 |
|
Test case number | => bugs vis(004) bug23191 |
| 2014-07-16 15:17 |
|
Assigned To | mkv => bugmaster |
| 2014-07-16 15:17 |
|
Status | feedback => tested |
| 2014-07-25 14:45 | bugmaster | Changeset attached | => occt master 7d7ddef3 |
| 2014-07-25 14:45 | bugmaster | Status | tested => verified |
| 2014-07-25 14:45 | bugmaster | Resolution | open => fixed |
| 2014-07-28 16:42 | git | Note Added: 0030448 | |
| 2014-11-11 12:46 |
|
Fixed in Version | => 6.8.0 |
| 2014-11-11 12:57 |
|
Status | verified => closed |
