#if ( __APPLE__ ) 
#       include <GLUT/glut.h>
#else
#       include <GL/glut.h>
#endif
#include "SceneElement.hh"
#include <stdlib.h>
#include <string.h>
#include <dlfcn.h>
#include <stdio.h>

SceneElement::SceneElement(const char* model_name) {
    char name[128];

    pos[0] = 0.0;
    pos[1] = 0.0;
    pos[2] = 0.0;

    vel[0] = 1.0;
    vel[1] = 0.0;
    vel[2] = 0.0;

    R[0][0] = 1.0;
    R[0][1] = 0.0;
    R[0][2] = 0.0;
    R[0][3] = 0.0;

    R[1][0] = 0.0;
    R[1][1] = 1.0;
    R[1][2] = 0.0;
    R[1][3] = 0.0;

    R[2][0] = 0.0;
    R[2][1] = 0.0;
    R[2][2] = 1.0;
    R[2][3] = 0.0;

    R[3][0] = 0.0;
    R[3][1] = 0.0;
    R[3][2] = 0.0;
    R[3][3] = 1.0;

    dl_handle = dlopen( NULL, RTLD_LAZY ) ;

    name[0] = '\0';
    strcat(name, model_name);
    strcat(name, "_initialize");

    if ((model_init_func = (void(*)(void)) dlsym(dl_handle, name)) != NULL) {
        (*model_init_func)();
    } else {
        fprintf(stderr, "Failed to find %s.\n", name);
        fflush(stdout);
    }

    name[0] = '\0';
    strcat(name, model_name);
    strcat(name, "_display");

    if ((model_display_func = (void(*)(void)) dlsym(dl_handle, name)) == NULL) {
        printf("Failed to find %s.\n", name);
        fflush(stdout);
    }

};

void SceneElement::init() {
    if (model_init_func != 0) {
      (*model_init_func)();
    } 
}

void SceneElement::display() {

    glMatrixMode(GL_MODELVIEW);
    glPushMatrix();
    glTranslated (pos[0], pos[1], pos[2]);
    glMultMatrixd((GLdouble*)R);
    if (model_display_func != 0) {
      (*model_display_func)();
    } 
    glPopMatrix();

}