api8/src/manif.c

#include "../includes/animations.h"

static GLuint _pId = 0;
static GLuint _planId = 0;

struct manifestant {
  GLuint corps, tete;
  // Offsets
  GLfloat ox, oz;
};

#define HEROS_NUMBER 70 // should change in fragment shader too
static struct manifestant _herosId[HEROS_NUMBER];

static const char *matrix_proj = "proj";
static const char *matrix_model = "model";
static const char *matrix_view = "view";

static void init(void);
static void draw(void);

void manif(int state) {
  switch (state) {
  case GL4DH_INIT:
    init();
    break;

  case GL4DH_DRAW:
    draw();
    break;

  default:
    break;
  }
}

static void init(void) {
  _planId = gl4dgGenQuadf();

  // Last Offset X and Z
  for (int i = 0; i < HEROS_NUMBER; ++i) {
    _herosId[i].corps = gl4dgGenCubef();
    _herosId[i].tete = gl4dgGenSpheref(20, 20);
    _herosId[i].ox = ((GLfloat)rand() / (GLfloat)RAND_MAX) * -7;
    _herosId[i].oz = ((GLfloat)rand() / (GLfloat)RAND_MAX) * 10;

    /* printf("Generating #%d\t=> %f:%f\n", _herosId[i].corps,
           (double)_herosId[i].ox, (double)_herosId[i].oz); */
  }
  _pId =
      gl4duCreateProgram("<vs>shaders/manif.vs", "<fs>shaders/manif.fs", NULL);

  gl4duGenMatrix(GL_FLOAT, matrix_proj);
  gl4duGenMatrix(GL_FLOAT, matrix_model);
  gl4duGenMatrix(GL_FLOAT, matrix_view);

  glEnable(GL_DEPTH_TEST);
}

static void draw(void) {
  static double t0 = 0;
  double dt = get_dt(&t0, GL_TRUE);

  glClearColor(0.2f, 0.2f, 0.8f, 1); // couleur ciel
  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  glUseProgram(_pId);

  const GLfloat couleur_plan[] = {0.3f, 0.3f, 0.3f, 1},
                couleur_heros[] = {1, 1, 0, 1};
  GLint couleur_gpu = glGetUniformLocation(_pId, "couleur");
  static double deplacement = 0;

  const GLfloat lumpos[][4] = {{1, (GLfloat)(2 + 2 * sin(deplacement)), 1, 1},
                               {-1, (GLfloat)(2 + 2 * sin(deplacement)), 1, 1}},
                lumcolor[][4] = {{1, 0, 0, 1}, {0, 0, 1, 1}};

  glUniform4fv(glGetUniformLocation(_pId, "lum_pos"), 2, (float *)lumpos);
  glUniform4fv(glGetUniformLocation(_pId, "lum_color"), 2, (float *)lumcolor);

  bindAndLoadf(matrix_proj);
  GLfloat ratio = (GLfloat)_dims[0] / (GLfloat)_dims[1];
  gl4duFrustumf(-1, 1, -ratio, ratio, 1, 1000);

  bindAndLoadf(matrix_view);
  const GLfloat distance = 5;
  gl4duLookAtf(0, distance, distance, 0, 0, 0, 0, 1, 0);
  // gl4duRotatef(-30, 0, 1, 0);

  bindAndLoadf(matrix_model);
  gl4duRotatef(-90, 1, 0, 0);
  gl4duScalef(4 * distance, 2 * distance, 1);

  gl4duSendMatrices();
  glUniform4fv(couleur_gpu, 1, couleur_plan);
  gl4dgDraw(_planId);

  for (int i = 0; i < HEROS_NUMBER; ++i) {
    bindAndLoadf(matrix_model);
    gl4duTranslatef(0, 1, -1);
    gl4duScalef(0.1f, 0.7f, 0.2f);

    // Apply hero position
    move(_herosId[i].ox + (float)deplacement, 0, _herosId[i].oz, CORPS);

    // Draw corps
    gl4duSendMatrices();
    glUniform4fv(couleur_gpu, 1, couleur_heros);
    gl4dgDraw(_herosId[i].corps);

    bindAndLoadf(matrix_model);
    move(_herosId[i].ox + (float)deplacement, 0, _herosId[i].oz, TETE);
    gl4duTranslatef(0, 1.9f, -1);
    gl4duScalef(0.1f, 0.2f, 0.2f);

    gl4duSendMatrices();
    glUniform4fv(couleur_gpu, 1, couleur_heros);
    gl4dgDraw(_herosId[i].tete);
  }

  deplacement += 0.4 * M_PI * dt;
  glUseProgram(0);
}