OpenGL-JIN/src/main.cpp

#include "GL/glut.h"
#include "GL/gl.h"

#include "displayers.h"
#include "Texture.h"


volatile unsigned long long int timer_ticks = 0;
static Texture tree_texture;

void display()
{
    float angleY = 1*timer_ticks;
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glMatrixMode(GL_PROJECTION);
    // Prepare view
    glLoadIdentity();
    gluPerspective(60,(double)glutGet(GLUT_WINDOW_WIDTH)/(double)glutGet(GLUT_WINDOW_HEIGHT),10,30000);

    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    gluLookAt(10, 10, 10,
              0, 0, 1,
              0, 1, 0);


    display_rotating_pyramid(-5,-2,-5,2,4,angleY);
    display_rotating_pyramid(5,-2,0,1,5,angleY);
    display_rotating_pyramid(-2,-2,4,3,2,angleY);

    display_tree(0,-5,0,3,5,tree_texture);

    glutSwapBuffers();
}

void update_angle(int value)
{
    timer_ticks++;
    glutTimerFunc(50,update_angle,0);
}

int main(int argc, char** argv)
{
    glutInit(&argc,argv);
    // Generate window with GLUT
    glutInitDisplayMode(GLUT_RGB| GLUT_DEPTH | GLUT_DOUBLE);
    glutCreateWindow("Hello");

    // Init OpenGL
    glClearColor(0,0,0,1);
    glClearDepth(1.0);
//    glEnable(GL_LIGHTING);
//    glEnable(GL_LIGHT0);
    glEnable(GL_DEPTH_TEST);

    // Setup OPenGL to use textures
    glEnable(GL_TEXTURE_2D);
    glEnable(GL_ALPHA_TEST);
    glAlphaFunc(GL_GREATER, 0.5);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT/GL_CLAMP);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT/GL_CLAMP);
    glTexEnvi(GL_TEXTURE_2D, GL_TEXTURE_ENV_MODE, GL_MODULATE);

    // Load and generate tree texture
    tree_texture.load_rgb_tga("resources/arbre.tga");
    glGenTextures(1,tree_texture.opengl_id);
    glBindTexture(GL_TEXTURE_2D,tree_texture.opengl_id[0]);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, tree_texture.width,tree_texture.height,0,GL_RGB,GL_UNSIGNED_BYTE,tree_texture.image_data);
    gluBuild2DMipmaps(GL_TEXTURE_2D,GL_RGB8,tree_texture.width,tree_texture.height,GL_RGB,GL_UNSIGNED_BYTE,tree_texture.image_data);

    glViewport(0,0,glutGet(GLUT_WINDOW_WIDTH),glutGet(GLUT_WINDOW_HEIGHT));

    glutIdleFunc(display);
    glutTimerFunc(50,update_angle,0);

    // Enters main loop, managed by GLUT
    glutMainLoop();
	return 0;
}