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Merge pull request #3036 from malortie/sample-simpleopengl-minor-improvements 

Minor fixes and improvements in sample SimpleOpenGL.
pull/3049/head^2
Kim Kulling 2020-04-16 08:42:31 +02:00 committed by GitHub
parent 4b544f8984 20c125218d
commit 5feb3628e3
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 84 additions and 18 deletions
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18
samples/SimpleOpenGL/CMakeLists.txt
View File

@ -1,3 +1,5 @@
SET(SAMPLE_PROJECT_NAME assimp_simpleogl)
FIND_PACKAGE(OpenGL)
FIND_PACKAGE(GLUT)
IF ( MSVC )
@ -16,6 +18,10 @@ IF ( NOT GLUT_FOUND )
ENDIF ()
ENDIF ()
# Used for usage and error messages in the program.
ADD_COMPILE_DEFINITIONS(ASSIMP_VERSION="${ASSIMP_VERSION}")
ADD_COMPILE_DEFINITIONS(PROJECT_NAME="${SAMPLE_PROJECT_NAME}")
if ( MSVC )
ADD_DEFINITIONS( -D_SCL_SECURE_NO_WARNINGS )
ADD_DEFINITIONS( -D_CRT_SECURE_NO_WARNINGS )
@ -34,17 +40,17 @@ LINK_DIRECTORIES(
${Assimp_BINARY_DIR}/lib
)
ADD_EXECUTABLE( assimp_simpleogl
ADD_EXECUTABLE( ${SAMPLE_PROJECT_NAME}
Sample_SimpleOpenGL.c
)
SET_PROPERTY(TARGET assimp_simpleogl PROPERTY DEBUG_POSTFIX ${CMAKE_DEBUG_POSTFIX})
SET_PROPERTY(TARGET ${SAMPLE_PROJECT_NAME} PROPERTY DEBUG_POSTFIX ${CMAKE_DEBUG_POSTFIX})
TARGET_LINK_LIBRARIES( assimp_simpleogl assimp ${OPENGL_LIBRARIES} ${GLUT_LIBRARIES} ${M_LIB} )
SET_TARGET_PROPERTIES( assimp_simpleogl PROPERTIES
OUTPUT_NAME assimp_simpleogl
TARGET_LINK_LIBRARIES( ${SAMPLE_PROJECT_NAME} assimp ${OPENGL_LIBRARIES} ${GLUT_LIBRARIES} ${M_LIB} )
SET_TARGET_PROPERTIES( ${SAMPLE_PROJECT_NAME} PROPERTIES
OUTPUT_NAME ${SAMPLE_PROJECT_NAME}
)
INSTALL( TARGETS assimp_simpleogl
INSTALL( TARGETS ${SAMPLE_PROJECT_NAME}
DESTINATION "${ASSIMP_BIN_INSTALL_DIR}" COMPONENT assimp-dev
)

84
samples/SimpleOpenGL/Sample_SimpleOpenGL.c
View File

@ -15,9 +15,9 @@
#include <stdio.h>
#ifdef __APPLE__
#include <glut.h>
#include <freeglut.h>
#else
#include <GL/glut.h>
#include <GL/freeglut.h>
#endif
/* assimp include files. These three are usually needed. */
@ -25,6 +25,39 @@
#include <assimp/scene.h>
#include <assimp/postprocess.h>
#define COMMAND_USAGE "--usage"
/* ---------------------------------------------------------------------------- */
inline static void print_run_command(const char* command_name) {
printf("Run '%s %s' for more information.\n",
PROJECT_NAME, command_name);
}
/* ---------------------------------------------------------------------------- */
inline static void print_error(const char* msg) {
printf("ERROR: %s\n", msg);
}
#define NEW_LINE "\n"
#define DOUBLE_NEW_LINE NEW_LINE NEW_LINE
/* ---------------------------------------------------------------------------- */
inline static void print_usage() {
static const char* usage_format =
"Usage: "
PROJECT_NAME
" <file>" DOUBLE_NEW_LINE
"where:" DOUBLE_NEW_LINE
" %-10s %s" DOUBLE_NEW_LINE
"options:" DOUBLE_NEW_LINE
" %-10s %s" DOUBLE_NEW_LINE;
printf(usage_format,
// where
"file", "The input model file to load.",
// options
COMMAND_USAGE, "Display usage.");
}
/* the global Assimp scene object */
const C_STRUCT aiScene* scene = NULL;
GLuint scene_list = 0;
@ -245,7 +278,7 @@ void do_motion (void)
static int frames = 0;
int time = glutGet(GLUT_ELAPSED_TIME);
angle += (time-prev_time)*0.01f;
angle += static_cast<float>((time-prev_time)*0.01);
prev_time = time;
frames += 1;
@ -324,12 +357,42 @@ int loadasset (const char* path)
/* ---------------------------------------------------------------------------- */
int main(int argc, char **argv)
{
const char* model_file = NULL;
C_STRUCT aiLogStream stream;
if (argc < 2) {
print_error("No input model file specifed.");
print_run_command(COMMAND_USAGE);
return EXIT_FAILURE;
}
// Find and execute available commands entered by the user.
for (int i = 1; i < argc; ++i) {
if (!strncmp(argv[i], COMMAND_USAGE, strlen(COMMAND_USAGE))) {
print_usage();
return EXIT_SUCCESS;
}
}
// Check and validate the specified model file extension.
model_file = argv[1];
const char* extension = strchr(model_file, '.');
if (!extension) {
print_error("Please provide a file with a valid extension.");
return EXIT_FAILURE;
}
if (AI_FALSE == aiIsExtensionSupported(extension)) {
print_error("The specified model file extension is currently "
"unsupported in Assimp " ASSIMP_VERSION ".");
return EXIT_FAILURE;
}
glutInitWindowSize(900,600);
glutInitWindowPosition(100,100);
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
glutInit(&argc, argv);
glutSetOption(GLUT_ACTION_ON_WINDOW_CLOSE, GLUT_ACTION_GLUTMAINLOOP_RETURNS);
glutCreateWindow("Assimp - Very simple OpenGL sample");
glutDisplayFunc(display);
@ -346,14 +409,11 @@ int main(int argc, char **argv)
stream = aiGetPredefinedLogStream(aiDefaultLogStream_FILE,"assimp_log.txt");
aiAttachLogStream(&stream);
/* the model name can be specified on the command line. If none
is specified, we try to locate one of the more expressive test
models from the repository (/models-nonbsd may be missing in
some distributions so we need a fallback from /models!). */
if( 0 != loadasset( argc >= 2 ? argv[1] : "../../test/models-nonbsd/X/dwarf.x")) {
if( argc != 1 || (0 != loadasset( "../../../../test/models-nonbsd/X/dwarf.x") && 0 != loadasset( "../../test/models/X/Testwuson.X"))) {
return -1;
}
// Load the model file.
if(0 != loadasset(model_file)) {
print_error("Failed to load model. Please ensure that the specified file exists.");
aiDetachAllLogStreams();
return EXIT_FAILURE;
}
glClearColor(0.1f,0.1f,0.1f,1.f);
@ -384,5 +444,5 @@ int main(int argc, char **argv)
again. This will definitely release the last resources allocated
by Assimp.*/
aiDetachAllLogStreams();
return 0;
return EXIT_SUCCESS;
}