Bug report on 1.1.12

[Loeffler, David]

On my laptop, which runs a current CVS version of Survex 1.1.12 under
SuSE Linux 10.1, I've been noticing a curious bug with the mouse control.

The bug manifests itself if I open a survey, change to a view angle other
than plan, then click on a survey station to centre it in view. Thereafter,
the measuring line indicator doesn't quite follow the cursor -- it seems to 
always be pointing to something just to one side of the cursor, unless the
cursor is on another station in which case it snaps to the correct point.

Also, if one does the above steps then attempts to rotate the cave, one gets 
a sort of jittering effect, with the central point wobbling from side to side 
as the cave rotates in a strange random way.

Output of "About" window enclosed below, in case it's relevant.

Dave


--
Linux 2.6.18.8-0.3-default i686
wxWidgets 2.8.0 (GTK+ >= 2.4)
Display Depth: 24 bpp (colour)
OpenGL 1.3 Mesa 6.5.1
Tungsten Graphics, Inc
Mesa DRI Intel(R) 915GM 20050225 x86/MMX/SSE2
GL_ARB_depth_texture GL_ARB_fragment_program GL_ARB_imaging GL_ARB_multisample GL_ARB_multitexture GL_ARB_point_parameters GL_ARB_shadow GL_ARB_texture_border_clamp GL_ARB_texture_compression GL_ARB_texture_cube_map GL_ARB_texture_env_add GL_ARB_texture_env_combine GL_ARB_texture_env_crossbar GL_ARB_texture_env_dot3 GL_ARB_texture_mirrored_repeat GL_ARB_texture_rectangle GL_ARB_transpose_matrix GL_ARB_vertex_buffer_object GL_ARB_vertex_program GL_ARB_window_pos GL_EXT_abgr GL_EXT_bgra GL_EXT_blend_color GL_EXT_blend_equation_separate GL_EXT_blend_func_separate GL_EXT_blend_minmax GL_EXT_blend_subtract GL_EXT_clip_volume_hint GL_EXT_cull_vertex GL_EXT_compiled_vertex_array GL_EXT_convolution GL_EXT_copy_texture GL_EXT_draw_range_elements GL_EXT_fog_coord GL_EXT_histogram GL_EXT_multi_draw_arrays GL_EXT_packed_pixels GL_EXT_point_parameters GL_EXT_polygon_offset GL_EXT_rescale_normal GL_EXT_secondary_color GL_EXT_separate_specular_color GL_EXT_shadow_funcs GL_EXT_stencil_wrap GL_EXT_subtexture GL_EXT_texture GL_EXT_texture3D GL_EXT_texture_edge_clamp GL_EXT_texture_env_add GL_EXT_texture_env_combine GL_EXT_texture_env_dot3 GL_EXT_texture_filter_anisotropic GL_EXT_texture_lod_bias GL_EXT_texture_object GL_EXT_texture_rectangle GL_EXT_vertex_array GL_3DFX_texture_compression_FXT1 GL_APPLE_client_storage GL_APPLE_packed_pixels GL_ATI_blend_equation_separate GL_IBM_rasterpos_clip GL_IBM_texture_mirrored_repeat GL_INGR_blend_func_separate GL_MESA_pack_invert GL_MESA_ycbcr_texture GL_MESA_window_pos GL_NV_blend_square GL_NV_light_max_exponent GL_NV_texture_rectangle GL_NV_texgen_reflection GL_NV_vertex_program GL_NV_vertex_program1_1 GL_OES_read_format GL_SGI_color_matrix GL_SGI_color_table GL_SGIS_generate_mipmap GL_SGIS_texture_border_clamp GL_SGIS_texture_edge_clamp GL_SGIS_texture_lod GL_SGIX_depth_texture GL_SUN_multi_draw_arrays
R8G8B8
Max Texture size: 2048x2048
Max Viewport size: 4096x4096
Point Size 1.000-3.000 (granularity 1.000)

David Loeffler
Mathematics Department
Imperial College, London

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