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| #ifndef BUFFER_OFFSET
#define BUFFER_OFFSET(offset) ((char*)NULL+(offset))
#endif // BUFFER_OFFSET
#include <glad/glad.h>
#include <SDL2/SDL.h>
#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <fstream>
#include <sstream>
#include <vector>
#include <glm/glm.hpp>
#include <glm/gtc/type_ptr.hpp>
#define GLM_ENABLE_EXPERIMENTAL
#include <glm/gtx/transform.hpp>
using namespace glm;
void addVec3(std::vector<GLfloat> &vect,GLfloat v1,GLfloat v2,GLfloat v3){
vect.push_back(v1);
vect.push_back(v2);
vect.push_back(v3);
}
void addUv(std::vector<GLfloat> &vect,GLfloat v1,GLfloat v2){
vect.push_back(v1);
vect.push_back(v2);
}
GLuint load_texture(const char* path){
SDL_Surface *imageSDL = SDL_LoadBMP(path);
if(imageSDL == 0)
{
std::cout << "Erreur : " << SDL_GetError() << std::endl;
return 0;
}
GLuint m_id;
glGenTextures(1, &m_id);
glBindTexture(GL_TEXTURE_2D, m_id);
GLenum formatInterne=0;
GLenum format=0;
if(imageSDL->format->BytesPerPixel == 3)
{
// Format interne
formatInterne = GL_RGB;
// Format
if(imageSDL->format->Rmask == 0xff)
format = GL_RGB;
else
format = GL_BGR;
}
// Détermination du format et du format interne pour les images à 4 composantes
else if(imageSDL->format->BytesPerPixel == 4)
{
// Format interne
formatInterne = GL_RGBA;
// Format
if(imageSDL->format->Rmask == 0xff)
format = GL_RGBA;
else
format = GL_BGRA;
}
// Dans les autres cas, on arrête le chargement
else
{
std::cout << "Erreur, format interne de l'image inconnu" << std::endl;
SDL_FreeSurface(imageSDL);
return 0;
}
// Copie des pixels
glTexImage2D(GL_TEXTURE_2D, 0, formatInterne, imageSDL->w, imageSDL->h, 0, format, GL_UNSIGNED_BYTE, imageSDL->pixels);
// Application des filtre
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,GL_NEAREST_MIPMAP_NEAREST);
glGenerateMipmap(GL_TEXTURE_2D);
// Déverrouillage
glBindTexture(GL_TEXTURE_2D, 0);
// Fin de la méthode
SDL_FreeSurface(imageSDL);
return m_id;
};
GLuint LoadShaders(const char * vertex_file_path,const char * fragment_file_path){
// Create the shaders
GLuint VertexShaderID = glCreateShader(GL_VERTEX_SHADER);
GLuint FragmentShaderID = glCreateShader(GL_FRAGMENT_SHADER);
// Read the Vertex Shader code from the file
std::string VertexShaderCode;
std::ifstream VertexShaderStream(vertex_file_path, std::ios::in);
if(VertexShaderStream.is_open()){
std::stringstream sstr;
sstr << VertexShaderStream.rdbuf();
VertexShaderCode = sstr.str();
VertexShaderStream.close();
}else{
printf("Impossible to open %s. Are you in the right directory ? Don't forget to read the FAQ !\n", vertex_file_path);
getchar();
return 0;
}
// Read the Fragment Shader code from the file
std::string FragmentShaderCode;
std::ifstream FragmentShaderStream(fragment_file_path, std::ios::in);
if(FragmentShaderStream.is_open()){
std::stringstream sstr;
sstr << FragmentShaderStream.rdbuf();
FragmentShaderCode = sstr.str();
FragmentShaderStream.close();
}
GLint Result = GL_FALSE;
int InfoLogLength;
// Compile Vertex Shader
printf("Compiling shader : %s\n", vertex_file_path);
char const * VertexSourcePointer = VertexShaderCode.c_str();
glShaderSource(VertexShaderID, 1, &VertexSourcePointer , NULL);
glCompileShader(VertexShaderID);
// Check Vertex Shader
glGetShaderiv(VertexShaderID, GL_COMPILE_STATUS, &Result);
glGetShaderiv(VertexShaderID, GL_INFO_LOG_LENGTH, &InfoLogLength);
if ( InfoLogLength > 0 ){
std::vector<char> VertexShaderErrorMessage(InfoLogLength+1);
glGetShaderInfoLog(VertexShaderID, InfoLogLength, NULL, &VertexShaderErrorMessage[0]);
printf("%s\n", &VertexShaderErrorMessage[0]);
}
// Compile Fragment Shader
printf("Compiling shader : %s\n", fragment_file_path);
char const * FragmentSourcePointer = FragmentShaderCode.c_str();
glShaderSource(FragmentShaderID, 1, &FragmentSourcePointer , NULL);
glCompileShader(FragmentShaderID);
// Check Fragment Shader
glGetShaderiv(FragmentShaderID, GL_COMPILE_STATUS, &Result);
glGetShaderiv(FragmentShaderID, GL_INFO_LOG_LENGTH, &InfoLogLength);
if ( InfoLogLength > 0 ){
std::vector<char> FragmentShaderErrorMessage(InfoLogLength+1);
glGetShaderInfoLog(FragmentShaderID, InfoLogLength, NULL, &FragmentShaderErrorMessage[0]);
printf("%s\n", &FragmentShaderErrorMessage[0]);
}
// Link the program
printf("Linking program\n");
GLuint ProgramID = glCreateProgram();
glAttachShader(ProgramID, VertexShaderID);
glAttachShader(ProgramID, FragmentShaderID);
glLinkProgram(ProgramID);
// Check the program
glGetProgramiv(ProgramID, GL_LINK_STATUS, &Result);
glGetProgramiv(ProgramID, GL_INFO_LOG_LENGTH, &InfoLogLength);
if ( InfoLogLength > 0 ){
std::vector<char> ProgramErrorMessage(InfoLogLength+1);
glGetProgramInfoLog(ProgramID, InfoLogLength, NULL, &ProgramErrorMessage[0]);
printf("%s\n", &ProgramErrorMessage[0]);
}
glDetachShader(ProgramID, VertexShaderID);
glDetachShader(ProgramID, FragmentShaderID);
glDeleteShader(VertexShaderID);
glDeleteShader(FragmentShaderID);
return ProgramID;
}
void updateVBO(GLuint vbo,void* donnees,int taille,int offset)
{
glBindBuffer(GL_ARRAY_BUFFER,vbo);
void* adresseVbo=glMapBuffer(GL_ARRAY_BUFFER,GL_WRITE_ONLY);
memcpy((char*)adresseVbo+offset,donnees,taille);
glUnmapBuffer(GL_ARRAY_BUFFER);
adresseVbo=0;
glBindBuffer(GL_ARRAY_BUFFER,0);
}
int main(int argc, char **argv)
{
// Notre fenêtre
SDL_Window* fenetre=0;
SDL_GLContext contexteOpenGL=0;
SDL_Event evenements;
bool terminer(false);
// Initialisation de la SDL
if(SDL_Init(SDL_INIT_VIDEO) < 0)
{
std::cout << "Erreur lors de l'initialisation de la SDL : " << SDL_GetError() << std::endl;
SDL_Quit();
return -1;
}
// Version d'OpenGL
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK,SDL_GL_CONTEXT_PROFILE_CORE);
// Double Buffer
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
// Création de la fenêtre
fenetre = SDL_CreateWindow("Test SDL 2.0", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 800, 600, SDL_WINDOW_SHOWN | SDL_WINDOW_OPENGL);
if(fenetre == 0)
{
std::cout << "Erreur lors de la creation de la fenetre : " << SDL_GetError() << std::endl;
SDL_Quit();
return -1;
}
// Création du contexte OpenGL
contexteOpenGL = SDL_GL_CreateContext(fenetre);
if(contexteOpenGL == 0)
{
std::cout << SDL_GetError() << std::endl;
SDL_DestroyWindow(fenetre);
SDL_Quit();
return -1;
}
gladLoadGLLoader(SDL_GL_GetProcAddress);
GLuint texID=load_texture("textures\\img.bmp");
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
// Vertices et coordonnées
double px=0,py=0,a1,a2,speed=0.5,height=0.5;
Uint32 temps1,temps2;SDL_GetTicks();
int xm,ym;
unsigned int i,j,k,random;
srand(4654325);
char world[20][20][20],w1,w2;
for(i=0;i<20;i++){
for(j=0;j<20;j++){
random=rand()%2+3;
for(k=0;k<20;k++){
if(k<random)
world[i][k][j]=1;
else world[i][k][j]=0;
}
}
}
world[15][15][15]=1;
std::vector <GLfloat> vertices;
std::vector <GLfloat> coordTexture;
size_t fsize=sizeof(GLfloat);
for(i=0;i<20;i++){
for(j=0;j<20;j++){
for(k=0;k<20;k++){
w1=world[i][j][k];
if(i<19){
w2=world[i+1][j][k];
if(w1!=w2){
if(w1==1){
addVec3(vertices,i+1,j,k);
addVec3(vertices,i+1,j+1,k);
addVec3(vertices,i+1,j,k+1);
addVec3(vertices,i+1,j+1,k);
addVec3(vertices,i+1,j+1,k+1);
addVec3(vertices,i+1,j,k+1);
addUv(coordTexture,0.0,0.0);
addUv(coordTexture,1.0,0.0);
addUv(coordTexture,0.0,1.0);
addUv(coordTexture,1.0,0.0);
addUv(coordTexture,1.0,1.0);
addUv(coordTexture,0.0,1.0);
}
else{
addVec3(vertices,i+1,j,k);
addVec3(vertices,i+1,j,k+1);
addVec3(vertices,i+1,j+1,k);
addVec3(vertices,i+1,j+1,k);
addVec3(vertices,i+1,j,k+1);
addVec3(vertices,i+1,j+1,k+1);
addUv(coordTexture,0.0,0.0);
addUv(coordTexture,0.0,1.0);
addUv(coordTexture,1.0,0.0);
addUv(coordTexture,1.0,0.0);
addUv(coordTexture,0.0,1.0);
addUv(coordTexture,1.0,1.0);
}
}
}
if(j<19){
w2=world[i][j+1][k];
if(w1!=w2){
if(w1==1){
addVec3(vertices,i,j+1,k);
addVec3(vertices,i,j+1,k+1);
addVec3(vertices,i+1,j+1,k);
addVec3(vertices,i,j+1,k+1);
addVec3(vertices,i+1,j+1,k+1);
addVec3(vertices,i+1,j+1,k);
addUv(coordTexture,0.0,0.0);
addUv(coordTexture,0.0,1.0);
addUv(coordTexture,1.0,0.0);
addUv(coordTexture,0.0,1.0);
addUv(coordTexture,1.0,1.0);
addUv(coordTexture,1.0,0.0);
}
else{
addVec3(vertices,i,j+1,k);
addVec3(vertices,i+1,j+1,k);
addVec3(vertices,i,j+1,k+1);
addVec3(vertices,i,j+1,k+1);
addVec3(vertices,i+1,j+1,k);
addVec3(vertices,i+1,j+1,k+1);
addUv(coordTexture,0.0,0.0);
addUv(coordTexture,1.0,0.0);
addUv(coordTexture,0.0,1.0);
addUv(coordTexture,0.0,1.0);
addUv(coordTexture,1.0,0.0);
addUv(coordTexture,1.0,1.0);
}
}
}
if(k<19){
w2=world[i][j][k+1];
if(w1!=w2){
if(w1==1){
addVec3(vertices,i,j,k+1);
addVec3(vertices,i+1,j,k+1);
addVec3(vertices,i,j+1,k+1);
addVec3(vertices,i+1,j,k+1);
addVec3(vertices,i+1,j+1,k+1);
addVec3(vertices,i,j+1,k+1);
addUv(coordTexture,0.0,0.0);
addUv(coordTexture,1.0,0.0);
addUv(coordTexture,0.0,1.0);
addUv(coordTexture,1.0,0.0);
addUv(coordTexture,1.0,1.0);
addUv(coordTexture,0.0,1.0);
}
else{
addVec3(vertices,i,j,k+1);
addVec3(vertices,i,j+1,k+1);
addVec3(vertices,i+1,j,k+1);
addVec3(vertices,i+1,j,k+1);
addVec3(vertices,i,j+1,k+1);
addVec3(vertices,i+1,j+1,k+1);
addUv(coordTexture,0.0,0.0);
addUv(coordTexture,0.0,1.0);
addUv(coordTexture,1.0,0.0);
addUv(coordTexture,1.0,0.0);
addUv(coordTexture,0.0,1.0);
addUv(coordTexture,1.0,1.0);
}
}
}
}
}
}
GLuint vaoID=0;
GLuint vboID;
mat4 projection;
mat4 modelview;
projection = perspective(70.0, (double)800 / 600, 0.01, 1000.0);
GLuint programID = LoadShaders( "Shaders\\vertex.glsl", "Shaders\\fragment.glsl" );
glGenBuffers(1,&vboID);
glBindBuffer(GL_ARRAY_BUFFER,vboID);
glBufferData(GL_ARRAY_BUFFER,vertices.size()*fsize+coordTexture.size()*fsize,0,GL_STATIC_DRAW);
glBufferSubData(GL_ARRAY_BUFFER,0,vertices.size()*fsize,vertices.data());
glBufferSubData(GL_ARRAY_BUFFER,vertices.size()*fsize,coordTexture.size()*fsize,coordTexture.data());
glBindBuffer(GL_ARRAY_BUFFER,0);
glGenVertexArrays(1,&vaoID);
glBindVertexArray(vaoID);
glBindBuffer(GL_ARRAY_BUFFER,vboID);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0,BUFFER_OFFSET(0));
glEnableVertexAttribArray(0);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 0,BUFFER_OFFSET(vertices.size()*fsize));
glEnableVertexAttribArray(1);
glBindBuffer(GL_ARRAY_BUFFER,0);
glBindVertexArray(0);
while(!terminer)
{
// Gestion des évènements
temps1=temps2;
SDL_PollEvent(&evenements);
switch(evenements.type)
{
case SDL_WINDOWEVENT: // Événement de la fenêtre
if ( evenements.window.event == SDL_WINDOWEVENT_CLOSE ) // Fermeture de la fenêtre
{
terminer = true;
}
break;
case SDL_KEYDOWN:
switch(evenements.key.keysym.sym)
{
case SDLK_z:
px+=speed*cos(a1);
py+=speed*sin(a1);
break;
case SDLK_s:
px-=speed*cos(a1);
py-=speed*sin(a1);
break;
case SDLK_q:
px+=speed*sin(a1);
py-=speed*cos(a1);
break;
case SDLK_d:
px-=speed*sin(a1);
py+=speed*cos(a1);
break;
case SDLK_SPACE:
height+=1;
break;
case SDLK_r:
height-=1;
break;
}
break;
case SDL_MOUSEMOTION :
SDL_GetMouseState(&xm, &ym);
break;
}
a1=(double)(xm-400)/100;
a2=(double)(ym-300)/300+1.55;
modelview = lookAt(vec3(px,height, py), vec3(px+sin(a2)*cos(a1),cos(a2)+height,py+sin(a2)*sin(a1)), vec3(0, 1, 0));
// Nettoyage de l'écran
glClear(GL_COLOR_BUFFER_BIT| GL_DEPTH_BUFFER_BIT);
glUseProgram(programID);
glUniformMatrix4fv(glGetUniformLocation(programID, "projection"), 1, GL_FALSE, value_ptr(projection));
glUniformMatrix4fv(glGetUniformLocation(programID, "modelview"), 1, GL_FALSE, value_ptr(modelview));
glBindVertexArray(vaoID);
glBindTexture(GL_TEXTURE_2D,texID);
glDrawArrays(GL_TRIANGLES, 0,vertices.size()/3);
glBindTexture(GL_TEXTURE_2D, 0);
glBindVertexArray(0);
glUseProgram(0);
// Actualisation de la fenêtre
SDL_GL_SwapWindow(fenetre);
temps2=SDL_GetTicks();
if(temps2-temps1<16)
SDL_Delay(16-temps2+temps1);
}
// On quitte la SDL
glDeleteBuffers(1,&vboID);
glDeleteVertexArrays(1,&vaoID);modelview=translate(modelview,vec3(0.0f,-40.0f,0.0f));
SDL_GL_DeleteContext(contexteOpenGL);
SDL_DestroyWindow(fenetre);
SDL_Quit();
return 0;
} |
passage de glew a glad
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