Celestia Forums

This problem is also seen in 1.2.4.

When one gets really close to an object and rotates around it, sometimes the object's image is only partially drawn.

This location (extracted from favorites.cel) is one such. The lower part of Dactyl is missing. As you rotate further, it disappears entirely.

"Dactyl-bug" {
isFolder false
parentFolder ""
base [ 0.00329300560317099 8.503514330307422e-007 -3.012422336149304e-005 ]
offset [ 1.322928312036398e-013 4.992751004295748e-017 1.531977669722018e-015 ]
axis [ 0.0557844 0.983073 0.174517 ]
angle 4.6093
time 2452710.07450143
selection "#0/Ida/Dactyl"
coordsys "geographic"
}

(Comment: increasing the time to 1,000,000x can almost make one queasy as Ida rotates in the sky.)

You must have some kind of video problem
I dont get this bug at all

So I would think it is your end..

The problem was first noticed on my system at home
(XP Pro SP1, 2x 500MHz P3, 256MB; Nvidia Ti4200, Detonator v30, 2xAGP)

I also see it on my system at work, which is rather different.
(NT4 SP6a, 1x 2GHz P4, 256MB; ATI RAGE graphic card, details below)

When I select the "favorites" entry defined as above, Ida is in the upper half of the display, partially obscured by Dactyl, and an oval (Dactyl) is visible across the middle of the display. The lowest ~1/5 of the screen shows the stellar background. It should not.

If I rotate "down" very slowly (i.e. hold down both left&right mouse buttons and pull the mouse toward me slowly [I don't use a wheel-mouse at work]) more and more of the the stars in the bottom part of the screen become obscured as the bottom edge of Dactyl's image extends downward. If I slowly push the mouse away (again holding down both buttons) Dactyl's image disappears from the bottom up until it finally is gone and Ida is fully visible.

This problem is present when only "planets" are being rendered and also when any other objects also are being rendered (selected in the View Options menu).

Graphics card details at work:

In the Display Properties of the card at work, the
Settings / Display Type window has the following description
(retyped manually: cut-and-paste doesn't work)

Adapter Type:
ATI Rage 128 Ultra

Driver Information:
Manuf: ATI Technologies Inc.
Version Number: 4.3.3217c, 4.0.0
Current files: ati2mtaa.sys, ati2dvaa.dll

Adapter Information:

Chip Type: RAGE 128 PRO II, (AGP 4X/PCI)
DAC Type: Internal DAC (350MHz)
Memory Size: 32MB
Adapter String: 1002-5446-00
Bios Information: BK3.0.3 VR001.001.003.003.001.026 tfs__1x.3



Celestia's OpenGL Info for card at work:

Vendor: ATI Technologies Inc.
Renderer: RAGE 128 Pro Ultra x86/SSE
Version: 1.2.1517 WinNT Release
Max simultaneous textures: 2
Max texture size: 1024
Supported Extensions:

GL_ARB_multitexture
GL_ARB_texture_border_clamp
GL_ARB_texture_env_add
GL_ARB_transpose_matrix
GL_ARB_vertex_blend
GL_ATIX_pn_triangles
GL_ATI_texture_mirror_once
GL_ATI_vertex_streams
GL_EXT_abgr
GL_EXT_bgra
GL_EXT_clip_volume_hint
GL_EXT_compiled_vertex_array
GL_EXT_draw_range_elements
GL_EXT_fog_coord
GL_EXT_packed_pixels
GL_EXT_rescale_normal
GL_EXT_secondary_color
GL_EXT_separate_specular_color
GL_EXT_texgen_reflection
GL_EXT_texture3D
GL_EXT_texture_edge_clamp
GL_EXT_texture_env_add
GL_EXT_texture_env_combine
GL_EXT_texture_object
GL_EXT_vertex_array
GL_KTX_buffer_region
GL_MESA_window_pos
GL_NV_texgen_reflection
GL_SGI_texture_edge_clamp
GL_SGIS_texture_border_clamp
GL_SGIS_texture_lod
GL_SGIS_multitexture
GL_WIN_swap_hint
WGL_EXT_extensions_string
WGL_EXT_swap_control