#include <math.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#define GL_GLEXT_PROTOTYPES

#include <GL/gl.h>

#include <GL/glext.h>

#include <GL/glu.h>

#include <helianthus.h>

#include "gl3d.inc.c"

#include "hmap.inc.c"

#include "water.inc.c"

double mx, my;

HMap hmap, wmap;

Water water;

void generate() {

  hmapGenerate(&hmap);

  for(int i = 0; i < HMAP_SIZE; ++i)

    for(int j = 0; j < HMAP_SIZE; ++j)

      wmap.map[i][j] = hmap.map[i][j] + 0.1;

  for(int i = 0; i < 100; ++i)

    waterCycle(&water, 1, 0.8, 0.0);

  hmapCalcNormals(&hmap);

  hmapCalcNormals(&wmap);

  hmapBuildBuf(&hmap);

  hmapBuildBuf(&wmap);

}

void init() {

  hmapInit(&hmap, 1, 1, 1, 1, 1, 1);

  hmapInit(&wmap, 1, 1, 0, 0, 1, 0.25);

  waterInit(&water, &hmap, &wmap);

  generate();

  background(COLOR_BLACK);

}

void deinit() {

  hmapDeinit(&hmap);

  hmapDeinit(&wmap);

}

void draw() {

  double pmx = mx, pmy = my;

  mx = mouseX();

  my = mouseY();

  double dmx = mx - pmx;

  double dmy = my - pmy;

  if (keyWentDown("space"))

    generate();

  if (mouseDown("left")) {

    cameraRot[1] += dmx;

    cameraRot[0] += dmy;

  }

  if (mouseDown("right")) {

    cameraPos[2] *= pow(1.01, dmy);

    if (cameraPos[2] > -2) cameraPos[2] = -2;

  }

  begin3d();

  cubeDraw(1);

  hmapDraw(&hmap);

  glDepthMask(GL_FALSE);

  glPushMatrix();

  glTranslated(0, 0, -0.01);

  for(int i = 0; i < 1; ++i) {

    hmapDraw(&wmap);

    glTranslated(0, 0, 0.5);

  }

  glPopMatrix();

  glDepthMask(GL_TRUE);

  end3d();

}

int main() {

  windowSetResizable(TRUE);

  windowSetVariableFrameRate();

  windowSetInit(&init);

  windowSetDeinit(&deinit);

  windowSetDraw(&draw);

  windowRun();

  return 0;

}