第一个问题!
我正在尝试编译一些openGL代码,我使用glPushMatrix()。
我计划将代码重新格式化为更新的实践(因为glPushMatrix已被弃用),但是,现在,我想使用(openGL,GLU,GLUT)的版本?这个功能在哪里工作。
我当前的cmake文件看起来像这样
#CMakeLists.txt
cmake_minimum_required (VERSION 2.6)
project (PROJECTOR)
set( PROJECTOR_VERSION_MAJOR 0)
set( PROJECTOR_VERSION_MINOR 1)
add_executable( Projector.run /*...buncha files */ )
find_package(Boost)
include_directories(${Boost_INCLUDE_DIRS})
find_package(ImageMagick COMPONENTS Magick++)
include_directories(${ImageMagick_INCLUDE_DIRS})
# TODO - this doesn't rollback versions. It just sets a min version requirement.
# I'd like to roll back the versions.
find_package(OpenGL 2.0)
include_directories(${OpenGL_INCLUDE_DIRS})
find_package(GLUT REQUIRED)
include_directories(${GLUT_INCLUDE_DIRS})
find_package(GLU)
include_directories(${GLUE_INCLUDE_DIRS})
target_link_libraries(Projector.run ${ImageMagick_LIBRARIES})
target_link_libraries(Projector.run ${Boost_LIBRARIES})
target_link_libraries(Projector.run ${GLU_LIBRARIES})
target_link_libraries(Projector.run ${OpenGL_LIBRARIES})
target_link_libraries(Projector.run ${GLUT_LIBRARIES})
#
这是错误输出:
/usr/bin/ld: CMakeFiles/Projector.run.dir/open_image.cpp.o: undefined reference to symbol 'glPushMatrix'
//usr/lib/x86_64-linux-gnu/mesa/libGL.so.1: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
make[2]: *** [Projector.run] Error 1
make[1]: *** [CMakeFiles/Projector.run.dir/all] Error 2
make: *** [all] Error 2
这是一个代码片段:
...
glPushMatrix();
int img_height,img_width = 3;
int row,col = 0;
for(col = 0; col < img_height; col++ )
{
for(row = 0; row < img_width; row++){
glTranslatef(CUBE_DIMEN,0.0f,0.0f);
glColor3f(r_comp,g_comp,b_comp);
glutSolidCube(CUBE_DIMEN);
}
glTranslatef(-1 * img_width * CUBE_DIMEN, -CUBE_DIMEN, 0.0f);
}
glPopMatrix();
...
我应该添加什么以便我的程序可以构建?
使用-lGL
标志编译以包含库:
g++ -o main main.cpp -Wall -std=c++11 -lglut -lGL