开发平台(Platform): (Ex: VC++, GCC, Linux, ...) VS2012 额外使用到的函数库(Library Used): (Ex: OpenGL, ...) CUDA6.5、Optix3.9.0 问题(Question)： 我的最终目的要使用Optix做ray tracing并透过cuda加速， 目前打算先使用Optix里的SDK sample1做测试，但不知道是不是cuda、optix版本相容问题 用Cmake建好的专案，run的时候会告诉我invalid context(程式码会附在下面)， google有人发生类似的问题，他们是把cuda更新到6.0版本就没问题(但我的是最新版本囧) 想请问有没有人对cuda、optix熟，可以帮我解这个超新手问题>< 喂入的资料(Input)： command line： (在exe所在资料夹下) sample1.exe -f a.jpg 预期的正确结果(Expected Output)： 看教学应该是会输出一张jpg档 错误结果(Wrong Output)： error讯息： OptiX Error: Invalid context 程式码(Code)：(请善用置底文网页, 记得排版) sample1.c #include <optix.h> #include <stdlib.h> #include <stdio.h> #include <string.h> #include <sutil.h> void printUsageAndExit( const char* argv0 ); int main(int argc, char* argv[]) { /* Primary RTAPI objects */ RTcontext context; RTprogram ray_gen_program; RTbuffer buffer; /* Parameters */ RTvariable result_buffer; RTvariable draw_color; char path_to_ptx[512]; char outfile[512]; unsigned int width = 512u; unsigned int height = 384u; int i; int use_glut = 1; outfile[0] = '\0'; /* If "--file" is specified, don't do any GL stuff */ for( i = 1; i < argc; ++i ) { if( strcmp( argv[i], "--file" ) == 0 || strcmp( argv[i], "-f" ) == 0 ) use_glut = 0; } /* Process command line args */ if( use_glut ) RT_CHECK_ERROR_NO_CONTEXT( sutilInitGlut( &argc, argv ) ); for( i = 1; i < argc; ++i ) { if( strcmp( argv[i], "--help" ) == 0 || strcmp( argv[i], "-h" ) == 0 ) { printUsageAndExit( argv[0] ); } else if( strcmp( argv[i], "--file" ) == 0 || strcmp( argv[i],"-f")==0) { printf("file = %s\n",argv[i]); if( i < argc-1 ) { strcpy( outfile, argv[++i] ); printf("outfile = %s\n",outfile); } else { printUsageAndExit( argv[0] ); } } else if ( strncmp( argv[i], "--dim=", 6 ) == 0 ) { const char *dims_arg = &argv[i][6]; if ( sutilParseImageDimensions( dims_arg, &width, &height ) != RT_SUCCESS ) { fprintf( stderr, "Invalid window dimensions: '%s'\n", dims_arg ); printUsageAndExit( argv[0] ); } } else { fprintf( stderr, "Unknown option '%s'\n", argv[i] ); printUsageAndExit( argv[0] ); } } /* Create our objects and set state */ RT_CHECK_ERROR( rtContextCreate( &context ) ); RT_CHECK_ERROR( rtContextSetRayTypeCount( context, 1 ) ); RT_CHECK_ERROR( rtContextSetEntryPointCount( context, 1 ) ); RT_CHECK_ERROR( rtBufferCreate( context, RT_BUFFER_OUTPUT, &buffer ) ); RT_CHECK_ERROR( rtBufferSetFormat( buffer, RT_FORMAT_FLOAT4 ) ); RT_CHECK_ERROR( rtBufferSetSize2D( buffer, width, height ) ); RT_CHECK_ERROR( rtContextDeclareVariable( context, "result_buffer", &result_buffer ) ); RT_CHECK_ERROR( rtVariableSetObject( result_buffer, buffer ) ); sprintf( path_to_ptx, "%s/%s", sutilSamplesPtxDir(), "sample1_generated_draw_color.cu.ptx" ); RT_CHECK_ERROR( rtProgramCreateFromPTXFile( context, path_to_ptx, "draw_solid_color", &ray_gen_program ) ); RT_CHECK_ERROR( rtProgramDeclareVariable( ray_gen_program, "draw_color", &draw_color ) ); RT_CHECK_ERROR( rtVariableSet3f( draw_color, 0.462f, 0.725f, 0.0f ) ); RT_CHECK_ERROR( rtContextSetRayGenerationProgram( context, 0, ray_gen_program ) ); /* Run */ RT_CHECK_ERROR( rtContextValidate( context ) ); RT_CHECK_ERROR( rtContextCompile( context ) ); RT_CHECK_ERROR( rtContextLaunch2D( context, 0 /* entry point */, width, height ) ); /* Display image */ if( strlen( outfile ) == 0 ) { RT_CHECK_ERROR( sutilDisplayBufferInGlutWindow( argv[0], buffer ) ); } else { RT_CHECK_ERROR( sutilDisplayFilePPM( outfile, buffer ) ); } /* Clean up */ RT_CHECK_ERROR( rtBufferDestroy( buffer ) ); RT_CHECK_ERROR( rtProgramDestroy( ray_gen_program ) ); RT_CHECK_ERROR( rtContextDestroy( context ) ); return( 0 ); } void printUsageAndExit( const char* argv0 ) { fprintf( stderr, "Usage : %s [options]\n", argv0 ); fprintf( stderr, "Options: --file | -f <filename> Specify file for image output\n" ); fprintf( stderr, " --help | -h Print this usage message\n" ); fprintf( stderr, " --dim=<width>x<height> Set image dimensions; defaults to 512x384\n" ); exit(1); } draw_color.cu档内 #include <optix.h> #include <optixu/optixu_math_namespace.h> using namespace optix; rtDeclareVariable(uint2, launch_index, rtLaunchIndex, ); rtBuffer<float4, 2> result_buffer; rtDeclareVariable(float3, draw_color, , ); RT_PROGRAM void draw_solid_color() { result_buffer[launch_index] = make_float4(draw_color, 0.f); } 补充说明(Supplement)： 1.黄色那行为出现invalid context的function 2.之前有用别的cuda程式测试过没出现问题，但这个的cu档会出现红色波浪底线@@ 3.测其他范例程式也会卡在rtContextCreate( &context )这行 4.皆是用x64模式执行 请问是Cmake完後还要再另外Link(应该不必吧)还是cuda、optix版本出问题? 没碰过Optix、cuda，新手问题还请多包涵>< --

※ 发信站: 批踢踢实业坊(ptt.cc), 来自: 140.113.210.20 ※ 文章网址: https://webptt.com/cn.aspx?n=bbs/C_and_CPP/M.1450856946.A.4B8.html ※ 编辑: micrometer (140.113.210.20), 12/23/2015 15:52:32