I should probably specify the graphics cards in question. The working card is a NVidia 7300 LE. The card that passes the test, but still does not work is a NVidia NV37GL [Quadro FX 330/Quadro NVS280] (rev a2)
-Ben ________________________________ From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Ben Axelrod Sent: Friday, March 20, 2009 12:42 PM To: OpenSceneGraph Users Subject: [osg-users] ShadowMap Required OpenGL Extensions My application checks for the existence of some OpenGL extensions before allowing ShadowMap to be turned on. So far, I have been using this test: if (GL_EXT_framebuffer_object && (GL_ARB_fragment_program || GL_EXT_fragment_program) && (GL_ARB_fragment_program_shadow || GL_EXT_fragment_program_shadow)) { //enable ShadowMap } Note that I am using the 'fixed function fallback' by calling clearShaderList() after init() but before first frame. However, I have come across a graphics card that passes this test, yet does not render shadows properly. This graphics card has these key extensions: GL_EXT_framebuffer_object GL_ARB_fragment_program GL_ARB_fragment_program_shadow GL_ARB_fragment_shader As far as I can tell, the only extensions this card does NOT have, that my other card (which renders shadows fine) does is: GL_ARB_texture_non_power_of_two GL_ATI_texture_mirror_once GL_EXT_clip_volume_hint GL_EXT_texture_mirror_clamp Does ShadowMap require any of these extensions? Also, FYI, the graphics card in question has many more extensions that my working card does not have: GL_ARB_fragment_shader GL_ARB_half_float_pixel GL_ARB_multisample GL_ARB_pixel_buffer_object GL_ARB_shader_objects GL_ARB_shading_language_100 GL_ARB_texture_rectangle GL_ARB_transpose_matrix GL_ARB_vertex_buffer_object GL_ARB_vertex_shader GL_S3_s3tc GL_EXT_compiled_vertex_array GL_EXT_Cg_shader GL_EXT_framebuffer_blit GL_EXT_framebuffer_multisample GL_EXT_gpu_program_parameters GL_EXT_packed_depth_stencil GL_EXT_pixel_buffer_object GL_EXT_point_parameters GL_EXT_stencil_two_side GL_EXT_texture_compression_s3tc GL_EXT_texture_cube_map GL_EXT_texture_filter_anisotropic GL_EXT_texture_lod GL_EXT_texture_sRGB GL_EXT_timer_query GL_IBM_rasterpos_clip GL_KTX_buffer_region GL_NV_copy_depth_to_color GL_NV_depth_clamp GL_NV_fence GL_NV_float_buffer GL_NV_fog_distance GL_NV_fragment_program GL_NV_fragment_program_option GL_NV_framebuffer_multisample_coverage GL_NV_half_float GL_NV_multisample_filter_hint GL_NV_occlusion_query GL_NV_packed_depth_stencil GL_NV_pixel_data_range GL_NV_point_sprite GL_NV_primitive_restart GL_NV_register_combiners GL_NV_register_combiners2 GL_NV_texture_compression_vtc GL_NV_texture_env_combine4 GL_NV_texture_expand_normal GL_NV_texture_shader GL_NV_texture_shader2 GL_NV_texture_shader3 GL_NV_vertex_array_range GL_NV_vertex_array_range2 GL_NV_vertex_program GL_NV_vertex_program1_1 GL_NV_vertex_program2 GL_NV_vertex_program2_option GL_SUN_slice_accum Thanks, -Ben
_______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
