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| ID | Project | Category | View Status | Date Submitted | Last Update | ||||
| 0010406 | ParaView | Bug | public | 2010-03-10 20:29 | 2010-03-23 22:00 | ||||
| Reporter | Alan Scott | ||||||||
| Assigned To | Ken Moreland | ||||||||
| Priority | normal | Severity | minor | Reproducibility | always | ||||
| Status | closed | Resolution | no change required | ||||||
| Platform | OS | OS Version | |||||||
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| Target Version | Fixed in Version | ||||||||
| Summary | 0010406: TextureMapToSphere prevent seam is wrong | ||||||||
| Description | As per Greenfield, our TextureMapToSphere "Prevent Seam" is wrong. What it tries to do is draw the texture on the sphere twice. What it should do is draw the texture on the sphere, then CONTINUE to draw it one more time around. That way, if there are minor holes, the second draw of the texture will catch it. A good test texture is here: Use the world map, found at http://www.oera.net/How2/PlanetTexs/EarthMap_2500x1250.jpg [^] | ||||||||
| Tags | No tags attached. | ||||||||
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| Attached Files |  gradientimage.png [^] (50,188 bytes) 2010-03-11 09:16
 gradientmapped.png [^] (88,943 bytes) 2010-03-11 09:17
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(0019839) Ken Moreland (manager) 2010-03-11 09:21 |
I do not really understand the description of how the prevent seam should work, but I can see nothing wrong with the current implementation. The current implementation pastes the image on one side and then pastes the mirror image on the other. The intention is that the left of the image abuts itself and likewise for the right. You cannot have the left image touch the right in the texture. Even if they did match up on the image, the texture mapping hardware does not allow this discontinuity. The world map you are using is not a good test case for looking at the prevent seam feature. It's left and right sides match up, which is not always the case. I have attached a test gradient image to this bug that does not have its left and right (or top and bottom) match up. Notice that when you use the prevent seam option, there really is no seam in the texture mapping (an image of this is also attached). |
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(0019997) Alan Scott (manager) 2010-03-23 22:00 |
OK, I get it. Closing this one. |
| Notes |
| Issue History | |||
| Date Modified | Username | Field | Change |
| 2010-03-10 20:29 | Alan Scott | New Issue | |
| 2010-03-11 09:16 | Ken Moreland | File Added: gradientimage.png | |
| 2010-03-11 09:17 | Ken Moreland | File Added: gradientmapped.png | |
| 2010-03-11 09:21 | Ken Moreland | Note Added: 0019839 | |
| 2010-03-11 09:21 | Ken Moreland | Status | backlog => @80@ |
| 2010-03-11 09:21 | Ken Moreland | Resolution | open => no change required |
| 2010-03-11 09:21 | Ken Moreland | Assigned To | => Ken Moreland |
| 2010-03-23 22:00 | Alan Scott | Note Added: 0019997 | |
| 2010-03-23 22:00 | Alan Scott | Status | @80@ => closed |
| Issue History |
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