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Cubed/src/main.cpp

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#include <string>
#include <glad/glad.h>
#include <GLFW/glfw3.h>
#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>
#include <glm/gtc/type_ptr.hpp>
#include <Cubed/camera.hpp>
#include <Cubed/config.hpp>
#include <Cubed/gameplay/player.hpp>
#include <Cubed/gameplay/world.hpp>
#include <Cubed/map_table.hpp>
#include <Cubed/texture_manager.hpp>
#include <Cubed/tools/cubed_assert.hpp>
#include <Cubed/tools/log.hpp>
#include <Cubed/tools/shader_tools.hpp>
constexpr int NUM_VAO = 1;
constexpr int NUM_VBO = 1;
struct Vertex {
float x, y, z;
float s, t;
float layer;
};
GLuint rendering_program;
GLuint vao[NUM_VAO];
GLuint vbo[NUM_VBO];
GLuint mv_loc, proj_loc;
int width ,height;
float aspect;
glm::mat4 p_mat, v_mat, m_mat, mv_mat;
float inc = 0.01f;
float tf = 0.0f;
double last_time = 0.0f;
double delta_time = 0.0f;
GLuint texture_array;
Player player;
Camera camera;
TextureManager texture_manager;
World world;
std::vector<Vertex> vertex_data;
void setup_vertices(void) {
float vertices_pos[6][6][3] = {
// ===== front (z = +1) =====
-0.5f, -0.5f, 0.5f, // bottom left
-0.5f, 0.5f, 0.5f, // top left
0.5f, 0.5f, 0.5f, // top right
0.5f, 0.5f, 0.5f, // top right
0.5f, -0.5f, 0.5f, // bottom right
-0.5f, -0.5f, 0.5f, // bottom left
// ===== right (x = +1) =====
0.5f, -0.5f, 0.5f, // bottom front
0.5f, -0.5f, -0.5f, // bottom back
0.5f, 0.5f, -0.5f, // top back
0.5f, 0.5f, -0.5f, // top back
0.5f, 0.5f, 0.5f, // top front
0.5f, -0.5f, 0.5f, // bottom front
// ===== back (z = -1) =====
-0.5f, -0.5f, -0.5f, // bottom left
0.5f, -0.5f, -0.5f, // bottom right
0.5f, 0.5f, -0.5f, // top right
0.5f, 0.5f, -0.5f, // top right
-0.5f, 0.5f, -0.5f, // top left
-0.5f, -0.5f, -0.5f, // bottom left
// ===== left (x = -1) =====
-0.5f, -0.5f, -0.5f, // bottom back
-0.5f, -0.5f, 0.5f, // bottom front
-0.5f, 0.5f, 0.5f, // top front
-0.5f, 0.5f, 0.5f, // top front
-0.5f, 0.5f, -0.5f, // top back
-0.5f, -0.5f, -0.5f, // bottom back
// ===== top (y = +1) =====
-0.5f, 0.5f, -0.5f, // back left
0.5f, 0.5f, -0.5f, // back right
0.5f, 0.5f, 0.5f, // front right
0.5f, 0.5f, 0.5f, // front right
-0.5f, 0.5f, 0.5f, // front left
-0.5f, 0.5f, -0.5f, // back left
// ===== bottom (y = -1) =====
-0.5f, -0.5f, 0.5f, // front left
0.5f, -0.5f, 0.5f, // front right
0.5f, -0.5f, -0.5f, // back right
0.5f, -0.5f, -0.5f, // back right
-0.5f, -0.5f, -0.5f, // back left
-0.5f, -0.5f, 0.5f // front left
};
float tex_coords[6][6][2] = {
0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f,
};
// every block
for (int x = 0; x < DISTANCE * CHUCK_SIZE; x++) {
for (int z = 0; z < DISTANCE * CHUCK_SIZE; z++) {
for (int y = 0; y < CHUCK_SIZE; y++) {
const auto& block_render_data = world.get_block_render_data(x, y, z);
// air
if (block_render_data.block_id == 0) {
continue;
}
for (int face = 0; face < 6; face++) {
if (!block_render_data.draw_face[face]) {
continue;
}
for (int i = 0; i < 6; i++) {
Vertex vex = {
vertices_pos[face][i][0] + (float)x * 1.0f,
vertices_pos[face][i][1] + (float)y * 1.0f,
vertices_pos[face][i][2] + (float)z * 1.0f,
tex_coords[face][i][0],
tex_coords[face][i][1],
static_cast<float>(block_render_data.block_id * 6 + face)
};
vertex_data.emplace_back(vex);
}
}
}
}
}
glGenVertexArrays(NUM_VAO, vao);
glBindVertexArray(vao[0]);
glGenBuffers(NUM_VBO, vbo);
glBindBuffer(GL_ARRAY_BUFFER, vbo[0]);
glBufferData(GL_ARRAY_BUFFER, vertex_data.size() * sizeof(Vertex), vertex_data.data(), GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindVertexArray(0);
}
GLuint create_shader_program() {
std::string v_shader_str = Shader::read_shader_source("shaders/vShader.glsl");
std::string f_shader_str = Shader::read_shader_source("shaders/fShader.glsl");
const char *v_shader_source = v_shader_str.c_str();
const char *f_shader_source = f_shader_str.c_str();
GLuint v_shader = glCreateShader(GL_VERTEX_SHADER);
GLuint f_shader = glCreateShader(GL_FRAGMENT_SHADER);
GLint vc, fc;
glShaderSource(v_shader, 1, &v_shader_source, NULL);
glShaderSource(f_shader, 1, &f_shader_source, NULL);
glCompileShader(v_shader);
Shader::check_opengl_error();
glGetShaderiv(v_shader, GL_COMPILE_STATUS, &vc);
if (vc != 1) {
LOG::error("vertex compilation failed");
Shader::print_shader_log(v_shader);
}
glCompileShader(f_shader);
Shader::check_opengl_error();
glGetShaderiv(f_shader, GL_COMPILE_STATUS, &fc);
if (fc != 1) {
LOG::error("vertex compilation failed");
Shader::print_shader_log(f_shader);
}
GLuint vf_program = glCreateProgram();
glAttachShader(vf_program, v_shader);
glAttachShader(vf_program, f_shader);
glLinkProgram(vf_program);
GLint linked;
Shader::check_opengl_error();
glGetProgramiv(vf_program, GL_LINK_STATUS, &linked);
if (linked != 1) {
LOG::error("linking failed");
Shader::print_program_info(vf_program);
}
return vf_program;
}
void init(GLFWwindow* window) {
rendering_program = create_shader_program();
mv_loc = glGetUniformLocation(rendering_program, "mv_matrix");
proj_loc = glGetUniformLocation(rendering_program, "proj_matrix");
camera.camera_init(&player);
glfwGetFramebufferSize(window, &width, &height);
aspect = (float)width / (float)height;
glViewport(0, 0, width, height);
p_mat = glm::perspective(glm::radians(60.0f), aspect, 0.1f, 1000.0f);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
#ifndef NDEBUG
glEnable(GL_DEBUG_OUTPUT);
glDebugMessageCallback([](GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar* message, const void* user_param) {
LOG::info("GL Debug: {}", reinterpret_cast<const char*>(message));
}, nullptr);
#endif
setup_vertices();
}
void window_reshape_callback(GLFWwindow* window, int new_width, int new_height) {
glfwGetFramebufferSize(window, &width, &height);
aspect = (float)width / (float)height;
glViewport(0, 0, width, height);
p_mat = glm::perspective(glm::radians(60.0f), aspect, 0.1f, 1000.0f);
}
void cursor_position_callback(GLFWwindow* window, double xpos, double ypos) {
camera.update_cursor_position_camera(xpos, ypos);
}
void display(GLFWwindow* window, double current_time) {
delta_time = current_time - last_time;
last_time = current_time;
player.update(delta_time);
camera.update_move_camera();
glClearColor(0.0, 0.0, 0.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
glClear(GL_DEPTH_BUFFER_BIT);
glUseProgram(rendering_program);
glBindVertexArray(vao[0]);
glBindBuffer(GL_ARRAY_BUFFER, vbo[0]);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)0);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, s));
glVertexAttribPointer(2, 1, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, layer));
glEnableVertexAttribArray(0);
glEnableVertexAttribArray(1);
glEnableVertexAttribArray(2);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D_ARRAY, texture_array);
m_mat = glm::translate(glm::mat4(1.0f), glm::vec3(0.0f, 0.0f, 0.0f));
v_mat = camera.get_camera_lookat();
mv_mat = v_mat * m_mat;
glUniformMatrix4fv(mv_loc, 1, GL_FALSE, glm::value_ptr(mv_mat));
glUniformMatrix4fv(proj_loc, 1 ,GL_FALSE, glm::value_ptr(p_mat));
glDrawArrays(GL_TRIANGLES, 0, vertex_data.size() * 3);
}
void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods) {
switch(key) {
case GLFW_KEY_ESCAPE:
if (action == GLFW_PRESS) {
if (glfwGetInputMode(window, GLFW_CURSOR) == GLFW_CURSOR_DISABLED) {
glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_NORMAL);
} else if (glfwGetInputMode(window, GLFW_CURSOR) == GLFW_CURSOR_NORMAL) {
glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
}
}
break;
}
player.update_player_move_state(key, action);
}
int main() {
if (!glfwInit()) {
LOG::error("glfwinit fail");
exit(EXIT_FAILURE);
}
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 6);
GLFWwindow* window = glfwCreateWindow(800, 600, "Cubed", NULL, NULL);
glfwMakeContextCurrent(window);
if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
LOG::error("Failed to initialize glad");
return -1;
}
LOG::info("OpenGL Version: {}.{}", GLVersion.major, GLVersion.minor);
LOG::info("Renderer: {}", reinterpret_cast<const char*>(glGetString(GL_RENDERER)));
glfwSwapInterval(1);
glfwSetWindowSizeCallback(window, window_reshape_callback);
glfwSetKeyCallback(window, key_callback);
glfwSetCursorPosCallback(window, cursor_position_callback);
MapTable::init_map();
texture_manager.init_texture();
world.init_world();
texture_array = texture_manager.get_texture_array();
init(window);
glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
while(!glfwWindowShouldClose(window)) {
display(window, glfwGetTime());
glfwSwapBuffers(window);
glfwPollEvents();
}
glfwDestroyWindow(window);
glfwTerminate();
exit(EXIT_SUCCESS);
}
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