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View Full Version : Bumpmapping with NV_rehister_combiners



CopyCat
04-04-2002, 03:26 AM
HI
Got a question.
I wanted to implement the dot3 bumpmapping using NV_register_combiners etxension.
Looked at some samples and discovered that this neads two passes and stores the result from the first pass in alpha buffer.
But can't init it ( GF 256 SDR ).
the glxinfo output looks like this.
So is there any other way or I messed somthing up ?
Using SuSE Linux 7.3 distribution iwth newes NV linux drivers ( 1.0-2802 if I'm correct )

++++++++++++++++++++++++++++++++++++++++++++++++++ ++++++++++++++
name of display: :0.0
display: :0 screen: 0
direct rendering: Yes
server glx vendor string: NVIDIA Corporation
server glx version string: 1.2
server glx extensions:
GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_SGIX_fbconfig,
GLX_SGIX_pbuffer
client glx vendor string: NVIDIA Corporation
client glx version string: 1.2
client glx extensions:
GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_visual_info,
GLX_EXT_visual_rating, GLX_EXT_import_context, GLX_SGI_video_sync,
GLX_SGIX_swap_group, GLX_SGIX_swap_barrier, GLX_SGIX_fbconfig,
GLX_SGIX_pbuffer
GLX extensions:
GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_SGIX_fbconfig,
GLX_SGIX_pbuffer, GLX_ARB_get_proc_address
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: GeForce 256/AGP/3DNOW!
OpenGL version string: 1.3.1 NVIDIA 28.02
OpenGL extensions:
GL_ARB_imaging, GL_ARB_multitexture, GL_ARB_texture_compression,
GL_ARB_texture_cube_map, GL_ARB_texture_env_add,
GL_ARB_texture_env_combine, GL_ARB_texture_env_dot3,
GL_ARB_transpose_matrix, GL_S3_s3tc, GL_EXT_abgr, GL_EXT_bgra,
GL_EXT_blend_color, GL_EXT_blend_minmax, GL_EXT_blend_subtract,
GL_EXT_clip_volume_hint, GL_EXT_compiled_vertex_array,
GL_EXT_draw_range_elements, GL_EXT_fog_coord, GL_EXT_multi_draw_arrays,
GL_EXT_packed_pixels, GL_EXT_paletted_texture, GL_EXT_point_parameters,
GL_EXT_rescale_normal, GL_EXT_secondary_color,
GL_EXT_separate_specular_color, GL_EXT_shared_texture_palette,
GL_EXT_stencil_wrap, GL_EXT_texture_compression_s3tc,
GL_EXT_texture_edge_clamp, GL_EXT_texture_env_add,
GL_EXT_texture_env_combine, GL_EXT_texture_env_dot3,
GL_EXT_texture_cube_map, GL_EXT_texture_filter_anisotropic,
GL_EXT_texture_lod, GL_EXT_texture_lod_bias, GL_EXT_texture_object,
GL_EXT_vertex_array, GL_EXT_vertex_weighting,
GL_IBM_texture_mirrored_repeat, GL_KTX_buffer_region, GL_NV_blend_square,
GL_NV_evaluators, GL_NV_fence, GL_NV_fog_distance,
GL_NV_light_max_exponent, GL_NV_packed_depth_stencil,
GL_NV_register_combiners, GL_NV_texgen_emboss, GL_NV_texgen_reflection,
GL_NV_texture_env_combine4, GL_NV_texture_rectangle,
GL_NV_vertex_array_range, GL_NV_vertex_array_range2, GL_NV_vertex_program,
GL_NV_vertex_program1_1, GL_SGIS_generate_mipmap, GL_SGIS_multitexture,
GL_SGIS_texture_lod
glu version: 1.3
glu extensions:
GLU_EXT_nurbs_tessellator, GLU_EXT_object_space_tess

visual x bf lv rg d st colorbuffer ax dp st accumbuffer ms cav
id dep cl sp sz l ci b ro r g b a bf th cl r g b a ns b eat
----------------------------------------------------------------------
0x21 16 tc 0 16 0 r y . 5 6 5 0 0 16 0 16 16 16 16 0 0 None
0x22 16 dc 0 16 0 r y . 5 6 5 0 0 16 0 16 16 16 16 0 0 None
0x23 16 tc 0 16 0 r . . 5 6 5 0 0 16 0 16 16 16 16 0 0 None
0x24 16 dc 0 16 0 r . . 5 6 5 0 0 16 0 16 16 16 16 0 0 None

04-04-2002, 10:51 PM
I guess that you want a alpha channel in your backbuffer? If you look at the available visuals is RGBA=5+6+5+0 so you have to increase the color depth to 24. This will get you visuals with RGBA=8+8+8+8.

Notice that you have to use GLUT_ALPHA since GLUT_RGBA is just the same as GLUT_RGB if you are using GLUT.