Re: Analytical Sphere bug ?
Hi, I know what the problem with analytical sphere is. Garry created the sphere so that its geometry points are not aligned to world's XYZ axis system (just click the sphere's radius point to some unusual direction, not directy to in the x axis). By default, sphere's object space will be aligned to world space even when you define the geometry points to unusual directions. Therefore, stretching the sphere from its scale handle skews the sphere geometry. Resetting lengths of elliptic axis directions does not remove skewing. You will simply get a skewed sphere whose elliptic dimensions are equally long. To understand what happens, just put the sphere into edit mode and examine the positions of the three handle points, and their distance from the center of the sphere before and after scaling. To summarize briefly: a 3d ellipsoid surface with 3 equal radius lentgths is not a sphere when the axis dimensions are not perpendicular to each other. Best regards, Vesa
Re: Analytical Sphere bug ?
I know what the problem with analytical sphere is. Garry created the sphere so that its geometry points are not aligned to world's XYZ axis system (just click the sphere's radius point to some unusual direction, not directy to in the x axis). Ahhh : OK Vesa . Understood . However , I always trusted the Reset View to Native State button to help me find my way back to 'World View' From that state I do _all_ my scene modeling , since I assumed this was my Fail Safe button . What must a user do to properly align their Startup projects (or any project) to World Space when modeling ? (a drag drop method , I would guess?) Thanks very much for your reply . studio www.niagara.com/~studio www.studiodynamics.net Hi, I know what the problem with analytical sphere is. Garry created the sphere so that its geometry points are not aligned to world's XYZ axis system (just click the sphere's radius point to some unusual direction, not directy to in the x axis). By default, sphere's object space will be aligned to world space even when you define the geometry points to unusual directions. Therefore, stretching the sphere from its scale handle skews the sphere geometry. Resetting lengths of elliptic axis directions does not remove skewing. You will simply get a skewed sphere whose elliptic dimensions are equally long. To understand what happens, just put the sphere into edit mode and examine the positions of the three handle points, and their distance from the center of the sphere before and after scaling. To summarize briefly: a 3d ellipsoid surface with 3 equal radius lentgths is not a sphere when the axis dimensions are not perpendicular to each other. Best regards, Vesa -- Internal Virus Database is out-of-date. Checked by AVG Free Edition. Version: 7.1.371 / Virus Database: 267.15.1/250 - Release Date: 2/3/2006
Re: Analytical Sphere bug ?
Hi, However , I always trusted the Reset View to Native State button to help me find my way back to 'World View' From that state I do _all_ my scene modeling , since I assumed this was my Fail Safe button . It is:) What must a user do to properly align their Startup projects (or any project) to World Space when modeling ? (a drag drop method , I would guess?) When you model the sphere, just take an exact front/side/top view. Next, when drawing the sphere's radius point, hold the shift key down and move the mouse approximately sideways. Shift lock helps to find the exact x azis. You can use grid snapping as well. Best regards, Vesa
Analytical Sphere bug ?
Hi : Could someone please verify this bug before I submit it ? 1) Create an analytical sphere in a Parallel Top or Side View . 2) Open it's view property window to the 'SPEC' tab . 3) Note Sphere's symmetrical 'Lengths' (same number 0.259 etc.) 4) Render to confirm symmetry . 5) Modify the Sphere's dimension by 'pulling on a sizing handle . 6) Note the difference in the Sphere's length number now . 7) Render to confirm lack of symmetry . 8) No problem , type in lengths to any same number again . 9) Render to confirm bug . Thanks in Advance . studio www.niagara.com/~studio www.studiodynamics.net
RE: Analytical Sphere bug ?
Hi Garry, Hi : Could someone please verify this bug before I submit it ? 1) Create an analytical sphere in a Parallel Top or Side View . 2) Open it's view property window to the 'SPEC' tab . 3) Note Sphere's symmetrical 'Lengths' (same number 0.259 etc.) 4) Render to confirm symmetry . 5) Modify the Sphere's dimension by 'pulling on a sizing handle . 6) Note the difference in the Sphere's length number now . 7) Render to confirm lack of symmetry . 8) No problem , type in lengths to any same number again . 9) Render to confirm bug . I followed your steps to the letter and I notice nothing extraordinary. If I put in the lengths fields 3 identical numbers, I get my sphere back. So, could you elaborate a little? What is the bug you get? Best regards, Robert http://members.ams.chello.nl/rbroeder
Re: Analytical Sphere bug ?
I followed your steps to the letter and I notice nothing extraordinary. If I put in the lengths fields 3 identical numbers, I get my sphere back. So, could you elaborate a little? What is the bug you get? Hi Robert : Hmmm , on all three of my machines I get a non-symmetrical Sphere back (effect was worse on my Laptop so maybe it has something to do with Aspect Ratio or Screen Resolution) ? What Screen Res are you using ? Try it with my 1280 x 1024 and see if that's the culprit . If not contact me privately and I'll mail you the project files from all 3 machines . Thanks . studio www.niagara.com/~studio www.studiodynamics.net Hi Garry, Hi : Could someone please verify this bug before I submit it ? 1) Create an analytical sphere in a Parallel Top or Side View . 2) Open it's view property window to the 'SPEC' tab . 3) Note Sphere's symmetrical 'Lengths' (same number 0.259 etc.) 4) Render to confirm symmetry . 5) Modify the Sphere's dimension by 'pulling on a sizing handle . 6) Note the difference in the Sphere's length number now . 7) Render to confirm lack of symmetry . 8) No problem , type in lengths to any same number again . 9) Render to confirm bug . I followed your steps to the letter and I notice nothing extraordinary. If I put in the lengths fields 3 identical numbers, I get my sphere back. So, could you elaborate a little? What is the bug you get? Best regards, Robert http://members.ams.chello.nl/rbroeder -- Internal Virus Database is out-of-date. Checked by AVG Free Edition. Version: 7.1.371 / Virus Database: 267.15.1/250 - Release Date: 2/3/2006
