Make the project work on Linux

(Lingua inconsistente!!) La guida qui descritta’ va’ compensata con i passaggi richiesti nelle slide

Install dependencies on Linux and make them work

Ubuntu-based (uso apt :)

installa GLFW3

sudo apt-get install libglfw3
sudo apt-get install libglfw3-dev

scarica lo zip GLAD come visto nel pdf guida (gl v3.3, add all extensions)

src/glad.c → spostalo nella cartella del progetto a cui vuoi lavorare

include → sposta le due cartelle glad e KHR in usr/local/include (estraile prima, io le ho messe in una cartella chiamata dependencies_GL_GLFW nella home)

sudo cp -r ~/dependencies_GL_GLFW/include/glad/ /usr/local/include
sudo cp -r ~/dependencies_GL_GLFW/include/KHR/ /usr/local/include
 
# date i permessi per accedere ai file nelle cartelle
sudo chmod 755 /usr/local/include/glad
sudo chmod 755 /usr/local/include/KHR

nella cartella del progetto, dato example1.cpp, bisogna compilarlo… vi passo il mio Make

g++ -pthread -o example1 example1.cpp glad/glad.c -lglfw -lGLU -lGL -lXrandr -lXxf86vm -lXi -lXinerama -lX11 -lrt -ldl

Assicuratevi il path a glad.c corrisponda, io l’ho messo in una cartella apposta per ordine

tutto fatto :) potete avviare l’output con

./example1

LAB_0

Make the project work in Linux

Per 2h ho avuto l’errore al caricamento delle shader

ERROR::SHADER::VERTEX::COMPILATION_FAILED

ERROR::SHADER::FRAGMENT::COMPILATION_FAILED

mi sono impazzito per cercare di fixare il problema, credendo fosse qualche dipendenza oscura di OpenGL o simili, invece e’ solo che su LAB_0_2D.cpp vengono chiamati i file con il nome sbagliato (case sensitive su Linux, quindi su Windows non c’e’ problema)

char* vertexShader = (char*)"vertexShaderC.glsl";
char* fragmentShader = (char*)"fragmentShaderC.glsl";

per compilare, basta il comando make per runnare, chiama l’eseguibile generato dal make

Makefile

# Compiler and Flags
CXX = g++
CXXFLAGS = -std=c++11 -Wall -g -pthread
LDFLAGS = -lglfw -lGLU -lGL -lXrandr -lXxf86vm -lXi -lXinerama -lX11 -lrt -ldl
SOURCES = $(filter-out LAB_0_2D.cpp, $(wildcard *.cpp)) glad.c # Automatically finds all .cpp files
OBJECTS = $(SOURCES:.cpp=.o)
EXEC = LAB_0_2D
 
# Default target (build the project)
all: $(EXEC)
 
# Linking object files to create the final executable
$(EXEC): $(OBJECTS)
	$(CXX) $(OBJECTS) -o $(EXEC) $(LDFLAGS)
 
# Compiling source files into object files
%.o: %.cpp
	$(CXX) $(CXXFLAGS) -c $< -o $@
 
# Clean up build artifacts
clean:
	rm -f $(OBJECTS) $(EXEC)
 
# Add phony target for "clean" to avoid conflicts with file names
.PHONY: all clean

per cambiare lab da runnare, cambia la linea 8

LAB_1

Makefile

# Compiler and Flags
CXX = g++
CXXFLAGS = -std=c++11 -Wall -g -pthread
LDFLAGS = -lglfw -lGLU -lGL -lXrandr -lXxf86vm -lXi -lXinerama -lX11 -lrt -ldl
SOURCES = $(filter-out LAB_0_2D.cpp, $(wildcard *.cpp)) glad.c # Automatically finds all .cpp files
OBJECTS = $(SOURCES:.cpp=.o)
EXEC = LAB_1
 
# Default target (build the project)
all: $(EXEC)
 
# Linking object files to create the final executable
$(EXEC): $(OBJECTS)
	$(CXX) $(OBJECTS) -o $(EXEC) $(LDFLAGS)
 
# Compiling source files into object files
%.o: %.cpp
	$(CXX) $(CXXFLAGS) -c $< -o $@
 
# Clean up build artifacts
clean:
	rm -f $(OBJECTS) $(EXEC)
 
# Add phony target for "clean" to avoid conflicts with file names
.PHONY: all clean

⚠ Se glad.c e’ nella stessa cartella, il clean lo cancellera’, mettetela in una cartella apposita

LAB_2

Makefile

# Compiler and Flags
CXX = g++
CXXFLAGS = -std=c++11 -Wall -g -pthread
LDFLAGS = -lglfw -lGLU -lGL -lXrandr -lXxf86vm -lXi -lXinerama -lX11 -lrt -ldl
SOURCES = $(wildcard *.cpp) glad.c # Automatically finds all .cpp files
OBJECTS = $(SOURCES:.cpp=.o)
EXEC = LAB_2_2D_BULLET_HELL
 
# Default target (build the project)
all: $(EXEC)
 
# Linking object files to create the final executable
$(EXEC): $(OBJECTS)
	$(CXX) $(OBJECTS) -o $(EXEC) $(LDFLAGS)
 
# Compiling source files into object files
%.o: %.cpp
	$(CXX) $(CXXFLAGS) -c $< -o $@
 
# Clean up build artifacts
clean:
	rm -f $(OBJECTS) $(EXEC)
 
# Add phony target for "clean" to avoid conflicts with file names
.PHONY: all clean
``
## LAB_3
### Make it work on Linux
(i have an ubuntu-based OS)
this created a bunch of problems, i updated my makefile and changed a few things:
```bash
sudo apt-get install libassimp-dev

i got the library from apt instead of the zip, as it simplified some stuff. Grab the other library (ImGui) and put it in the dependencies folder you made in LAB_0 ig

modify these files

Gui.cpp & Lab_03.cpp (i made the makefile handle the paths of these files)

#include "imgui.h"
#include "imgui_impl_glfw.h"
#include "imgui_impl_opengl3.h"

Change every broken include with proper paths to the folder with the imgui whenever there’s c:/windows etc. in the files (they’re only a few)

Change the shader import, the case is broken as always as we’ve seen every time…

Change the Lib.h and Strutture.h includes in a couple of files, as they use a different case than the one they actually are for some reason.

put the Meshes in the lab folder and compile / execute. Should go smoothly. Hopefully.

as a bonus, in the gestione_callback.cpp, you want to change this (line 45)

// on linux this is not necessary, only inverts the y axis controls
//ypos = height - ypos;

to fix the freaky camera it comes with.

LAB_3

Makefile

# Compiler and Flags
CXX = g++
CXXFLAGS = -std=c++11 -Wall -g -pthread \
           -I/home/[USER!!!]/dependencies_GL_GLFW/ImGui \
           -I/usr/include
# Add library paths and link flags
LDFLAGS = -lglfw -lGLU -lGL -lXrandr -lXxf86vm -lXi -lXinerama -lX11 -lrt -ldl -lassimp
 
 
# Source files
IMGUI_DIR = /home/luizo/dependencies_GL_GLFW/ImGui
IMGUI_SOURCES = $(IMGUI_DIR)/imgui.cpp \
                $(IMGUI_DIR)/imgui_demo.cpp \
                $(IMGUI_DIR)/imgui_draw.cpp \
                $(IMGUI_DIR)/imgui_tables.cpp \
                $(IMGUI_DIR)/imgui_widgets.cpp \
                $(IMGUI_DIR)/imgui_impl_glfw.cpp \
                $(IMGUI_DIR)/imgui_impl_opengl3.cpp
 
LOCAL_SOURCES = $(wildcard *.cpp)
SOURCES = $(LOCAL_SOURCES) glad.c $(IMGUI_SOURCES)
OBJECTS = $(LOCAL_SOURCES:.cpp=.o) glad.o $(IMGUI_SOURCES:.cpp=.o)
EXEC = LAB_3
 
# Default target (build the project)
all: $(EXEC)
 
# Linking object files to create the final executable
$(EXEC): $(OBJECTS)
	$(CXX) $(OBJECTS) -o $(EXEC) $(LDFLAGS)
 
# Compiling source files into object files
%.o: %.cpp
	$(CXX) $(CXXFLAGS) -c $< -o $@
 
# Clean up build artifacts
clean:
	rm -f $(OBJECTS) $(EXEC)
 
# Add phony target for "clean" to avoid conflicts with file names
.PHONY: all clean

LAB_4

Blender is FOSS and on linux :)))

Ho usato questi due tutorial in piu’ alle slide fornite su virtuale

• Tutorial: Blender Modelling for Absolute Beginners - Simple Human
• Character Modeling for Beginners - Blender