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main.cpp
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#include <gl/glut.h>
#include <random>
#include "Tetromino.h"
#include "Arena.h"
Utilities g_util = {};
GameState g_state = GameState::MENU_STATE;
Tetromino* g_tetro = nullptr;
Arena* g_arena = nullptr;
void setNewTetro() {
std::mt19937 gen(std::random_device{}());
std::uniform_int_distribution<std::mt19937::result_type> dist(0, (int)(TetroShape::NUM_OF_SHAPES) - 2);
dist(gen);
TetroShape shape = (TetroShape)(dist(gen));
g_tetro = new Tetromino(shape);
}
void handleNewTetro() {
if (g_util.y_pos() <= 2) {
g_state = GameState::OVER_STATE;
g_util.setBestScore();
return;
}
g_tetro->setState(g_arena, FieldState::FREE, TetroShape::NONE);
g_tetro->setXY(g_util.x_pos(), g_util.y_pos() - 1);
g_tetro->setState(g_arena, FieldState::FILLED);
delete g_tetro;
setNewTetro();
g_util.reset();
g_tetro->setXY(g_util.x_pos(), g_util.y_pos());
}
void drawTetro() {
if ((g_util.y_pos() > 2) || !g_tetro->isCollided(g_arena, g_util.x_pos(), g_util.y_pos())) {
g_tetro->setState(g_arena, FieldState::FREE, TetroShape::NONE);
g_tetro->setXY(g_util.x_pos(), g_util.y_pos());
g_tetro->setState(g_arena, FieldState::FALLING);
g_arena->drawGame();
}
}
void display() {
switch (g_state) {
case GameState::MENU_STATE:
g_arena->drawMenu();
break;
case GameState::PLAY_STATE: {
int levels_cleared = g_arena->clearLevels();
g_util.setScore(levels_cleared * 10);
g_util.setLines(levels_cleared);
drawTetro();
break;
}
case GameState::OVER_STATE:
g_arena->drawGameover(g_util);
break;
}
glutSwapBuffers();
}
void timerHandle(int value) {
switch (g_state) {
case GameState::MENU_STATE:
case GameState::OVER_STATE:
break;
case GameState::PLAY_STATE: {
g_util.setY(g_util.y_pos() + 1);
if (g_tetro->isCollided(g_arena, g_util.x_pos(), g_util.y_pos())) {
handleNewTetro();
}
glutPostRedisplay();
break;
}
}
glutTimerFunc(UtilContainer::game_speed, timerHandle, value);
}
void pressKey(unsigned char key, int x, int y) {
switch (key) {
case 'p': {
if (g_state != GameState::PLAY_STATE) {
g_state = GameState::PLAY_STATE;
g_util.reset(true);
g_arena->reset();
}
break;
}
case 'm': {
if (g_state != GameState::MENU_STATE) {
g_state = GameState::MENU_STATE;
g_util.reset(true);
g_arena->reset();
}
break;
}
case '2': {
if (g_arena->zOffset() > -1.7f)
break;
g_arena->setZOffset(g_arena->zOffset() + 0.1);
break;
}
case '1': {
g_arena->setZOffset(g_arena->zOffset() - 0.1);
break;
}
case 27:
exit(0);
}
glutPostRedisplay();
}
void pressSpecialKey(int key, int x, int y) {
switch (key) {
case GLUT_KEY_DOWN: {
g_util.setY(g_util.y_pos() + 1);
if(g_tetro->isCollided(g_arena, g_util.x_pos(), g_util.y_pos())) {
handleNewTetro();
}
break;
}
case GLUT_KEY_LEFT: {
g_util.setX(g_util.x_pos() - 1);
if (g_tetro->isCollided(g_arena, g_util.x_pos(), g_util.y_pos())) {
g_util.setX(g_util.x_pos() + 1);
}
break;
}
case GLUT_KEY_RIGHT: {
g_util.setX(g_util.x_pos() + 1);
if (g_tetro->isCollided(g_arena, g_util.x_pos(), g_util.y_pos())) {
g_util.setX(g_util.x_pos() - 1);
}
break;
}
case GLUT_KEY_UP: {
g_tetro->setState(g_arena, FieldState::FREE, TetroShape::NONE);
g_tetro->rotate();
if (g_tetro->isCollided(g_arena, g_util.x_pos(), g_util.y_pos())) {
g_tetro->rotate();
g_tetro->rotate();
g_tetro->rotate();
}
break;
}
}
glutPostRedisplay();
}
void onMouse(int button, int state, int x, int y) {
g_util.setMouseUtil(x, y, button);
glutPostRedisplay();
}
void onMouseMotion(int x, int y) {
switch (g_util.button()) {
case GLUT_LEFT_BUTTON: {
g_arena->setRotation(x, y, g_util);
g_util.setMouseUtil(x, y);
}
}
glutPostRedisplay();
}
void reshape(int width, int height) {
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(60, width / height, 1.0, 100.0);
glMatrixMode(GL_MODELVIEW);
}
int main(int argc, char** argv) {
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
glutInitWindowPosition(200, 50);
glutInitWindowSize(800, 800);
glutCreateWindow("2D Tetris Game");
glutDisplayFunc(display);
glutReshapeFunc(reshape);
glutIgnoreKeyRepeat(true);
glutKeyboardFunc(pressKey);
glutSpecialFunc(pressSpecialKey);
glutMouseFunc(onMouse);
glutMotionFunc(onMouseMotion);
glutTimerFunc(UtilContainer::game_speed, timerHandle, 0);
g_arena = new Arena();
setNewTetro();
glutMainLoop();
return 0;
}