Beispiel #1
0
// Render a cube with ID w at x, y. This function is used to render the inventory
// blocks, like the belt and the inventory screen.
void render_inventory_block(Attrib *attrib, int w, float s, float x, float y, int flag) {
    glUseProgram(attrib->program);
    glUniform3f(attrib->camera, 0, 0, 5);
    glUniform1i(attrib->sampler, 0); // GL_TEXTURE0
    glUniform1f(attrib->timer, PI*2);
    float identity[16];
    mat_identity(identity);
    glUniformMatrix4fv(attrib->extra5, 1, GL_FALSE, identity);
    float matrix[16];
    GLuint buffer;

    // Default block rotations
    float rx = -PI/4;
    float ry = -PI/10;
    float rz = 0;
    float dz = 0;

    switch (flag) {
        case 1:
            rx = -PI/8;
            break;
        case 2:
            rx = -PI/8;
            ry = -PI/10;
            rz = -PI/16;
            dz = -1.0;
            break;
        case 3:
            rx = -PI/8;
            ry = -PI/10;
            rz = -PI/16;
            dz = 2.0;
            break;
    }

    set_matrix_item_r(matrix, g->width, g->height, s, x, y, rx, ry, rz);

    if (is_plant(w)) {
        glDeleteBuffers(1, &buffer);
        buffer = gen_plant_buffer(0, 0, dz, 0.5, w);
    } else {
        buffer = gen_cube_buffer(0, 0, dz, 0.5, w);
    }
    glUniformMatrix4fv(attrib->matrix, 1, GL_FALSE, matrix);
    if (is_plant(w)) {
        draw_plant(attrib, buffer);
    } else {
        draw_cube(attrib, buffer);
    }
    del_buffer(buffer);
}
Beispiel #2
0
int main(int argc, char **argv) {
    srand(time(NULL));
    rand();
    if (argc == 2 || argc == 3) {
        char *hostname = argv[1];
        int port = DEFAULT_PORT;
        if (argc == 3) {
            port = atoi(argv[2]);
        }
        db_disable();
        client_enable();
        client_connect(hostname, port);
        client_start();
    }
    if (!glfwInit()) {
        return -1;
    }
    create_window();
    if (!window) {
        glfwTerminate();
        return -1;
    }
    glfwMakeContextCurrent(window);
    glfwSwapInterval(VSYNC);
    glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
    glfwSetKeyCallback(window, on_key);
    glfwSetCharCallback(window, on_char);
    glfwSetMouseButtonCallback(window, on_mouse_button);
    glfwSetScrollCallback(window, on_scroll);

    #ifndef __APPLE__
        if (glewInit() != GLEW_OK) {
            return -1;
        }
    #endif

    if (db_init()) {
        return -1;
    }

    glEnable(GL_CULL_FACE);
    glEnable(GL_DEPTH_TEST);
    glEnable(GL_LINE_SMOOTH);
    glLogicOp(GL_INVERT);
    glClearColor(0.53, 0.81, 0.92, 1.00);

    GLuint texture;
    glGenTextures(1, &texture);
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, texture);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    load_png_texture("texture.png");

    GLuint font;
    glGenTextures(1, &font);
    glActiveTexture(GL_TEXTURE1);
    glBindTexture(GL_TEXTURE_2D, font);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    load_png_texture("font.png");

    GLuint block_program = load_program(
        "shaders/block_vertex.glsl", "shaders/block_fragment.glsl");
    GLuint matrix_loc = glGetUniformLocation(block_program, "matrix");
    GLuint camera_loc = glGetUniformLocation(block_program, "camera");
    GLuint sampler_loc = glGetUniformLocation(block_program, "sampler");
    GLuint timer_loc = glGetUniformLocation(block_program, "timer");
    GLuint position_loc = glGetAttribLocation(block_program, "position");
    GLuint normal_loc = glGetAttribLocation(block_program, "normal");
    GLuint uv_loc = glGetAttribLocation(block_program, "uv");

    GLuint line_program = load_program(
        "shaders/line_vertex.glsl", "shaders/line_fragment.glsl");
    GLuint line_matrix_loc = glGetUniformLocation(line_program, "matrix");
    GLuint line_position_loc = glGetAttribLocation(line_program, "position");

    GLuint text_program = load_program(
        "shaders/text_vertex.glsl", "shaders/text_fragment.glsl");
    GLuint text_matrix_loc = glGetUniformLocation(text_program, "matrix");
    GLuint text_sampler_loc = glGetUniformLocation(text_program, "sampler");
    GLuint text_position_loc = glGetAttribLocation(text_program, "position");
    GLuint text_uv_loc = glGetAttribLocation(text_program, "uv");

    GLuint item_position_buffer = 0;
    GLuint item_normal_buffer = 0;
    GLuint item_uv_buffer = 0;
    int previous_block_type = 0;
    char messages[MAX_MESSAGES][TEXT_BUFFER_SIZE] = {0};
    int message_index = 0;

    Chunk chunks[MAX_CHUNKS];
    int chunk_count = 0;

    Player players[MAX_PLAYERS];
    int player_count = 0;

    FPS fps = {0, 0};
    float matrix[16];
    float x = (rand_double() - 0.5) * 10000;
    float z = (rand_double() - 0.5) * 10000;
    float y = 0;
    float dy = 0;
    float rx = 0;
    float ry = 0;
    double px = 0;
    double py = 0;

    int loaded = db_load_state(&x, &y, &z, &rx, &ry);
    ensure_chunks(chunks, &chunk_count, x, y, z, 1);
    if (!loaded) {
        y = highest_block(chunks, chunk_count, x, z) + 2;
    }

    glfwGetCursorPos(window, &px, &py);
    double previous = glfwGetTime();
    while (!glfwWindowShouldClose(window)) {
        int width, height;
        glfwGetFramebufferSize(window, &width, &height);
        glViewport(0, 0, width, height);

        update_fps(&fps, SHOW_FPS);
        double now = glfwGetTime();
        double dt = MIN(now - previous, 0.2);
        previous = now;

        if (exclusive && (px || py)) {
            double mx, my;
            glfwGetCursorPos(window, &mx, &my);
            float m = 0.0025;
            rx += (mx - px) * m;
            ry -= (my - py) * m;
            if (rx < 0) {
                rx += RADIANS(360);
            }
            if (rx >= RADIANS(360)){
                rx -= RADIANS(360);
            }
            ry = MAX(ry, -RADIANS(90));
            ry = MIN(ry, RADIANS(90));
            px = mx;
            py = my;
        }
        else {
            glfwGetCursorPos(window, &px, &py);
        }

        int sz = 0;
        int sx = 0;
        if (!typing) {
            float m = dt * 1.0;
            ortho = glfwGetKey(window, CRAFT_KEY_ORTHO);
            fov = glfwGetKey(window, CRAFT_KEY_ZOOM) ? 15.0 : 65.0;
            if (glfwGetKey(window, CRAFT_KEY_QUIT)) break;
            if (glfwGetKey(window, CRAFT_KEY_FORWARD)) sz--;
            if (glfwGetKey(window, CRAFT_KEY_BACKWARD)) sz++;
            if (glfwGetKey(window, CRAFT_KEY_LEFT)) sx--;
            if (glfwGetKey(window, CRAFT_KEY_RIGHT)) sx++;
            if (glfwGetKey(window, GLFW_KEY_LEFT)) rx -= m;
            if (glfwGetKey(window, GLFW_KEY_RIGHT)) rx += m;
            if (glfwGetKey(window, GLFW_KEY_UP)) ry += m;
            if (glfwGetKey(window, GLFW_KEY_DOWN)) ry -= m;
        }
        float vx, vy, vz;
        get_motion_vector(flying, sz, sx, rx, ry, &vx, &vy, &vz);
        if (!typing) {
            if (glfwGetKey(window, CRAFT_KEY_JUMP)) {
                if (flying) {
                    vy = 1;
                }
                else if (dy == 0) {
                    dy = 8;
                }
            }
            if (glfwGetKey(window, CRAFT_KEY_XM)) {
                vx = -1; vy = 0; vz = 0;
            }
            if (glfwGetKey(window, CRAFT_KEY_XP)) {
                vx = 1; vy = 0; vz = 0;
            }
            if (glfwGetKey(window, CRAFT_KEY_YM)) {
                vx = 0; vy = -1; vz = 0;
            }
            if (glfwGetKey(window, CRAFT_KEY_YP)) {
                vx = 0; vy = 1; vz = 0;
            }
            if (glfwGetKey(window, CRAFT_KEY_ZM)) {
                vx = 0; vy = 0; vz = -1;
            }
            if (glfwGetKey(window, CRAFT_KEY_ZP)) {
                vx = 0; vy = 0; vz = 1;
            }
        }
        float speed = flying ? 20 : 5;
        int step = 8;
        float ut = dt / step;
        vx = vx * ut * speed;
        vy = vy * ut * speed;
        vz = vz * ut * speed;
        for (int i = 0; i < step; i++) {
            if (flying) {
                dy = 0;
            }
            else {
                dy -= ut * 25;
                dy = MAX(dy, -250);
            }
            x += vx;
            y += vy + dy * ut;
            z += vz;
            if (collide(chunks, chunk_count, 2, &x, &y, &z)) {
                dy = 0;
            }
        }
        if (y < 0) {
            y = highest_block(chunks, chunk_count, x, z) + 2;
        }

        if (left_click) {
            left_click = 0;
            int hx, hy, hz;
            int hw = hit_test(chunks, chunk_count, 0, x, y, z, rx, ry,
                &hx, &hy, &hz);
            if (hy > 0 && is_destructable(hw)) {
                set_block(chunks, chunk_count, hx, hy, hz, 0);
                int above = get_block(chunks, chunk_count, hx, hy + 1, hz);
                if (is_plant(above)) {
                    set_block(chunks, chunk_count, hx, hy + 1, hz, 0);
                }
            }
        }

        if (right_click) {
            right_click = 0;
            int hx, hy, hz;
            int hw = hit_test(chunks, chunk_count, 1, x, y, z, rx, ry,
                &hx, &hy, &hz);
            if (is_obstacle(hw)) {
                if (!player_intersects_block(2, x, y, z, hx, hy, hz)) {
                    set_block(chunks, chunk_count, hx, hy, hz, block_type);
                }
            }
        }

        if (middle_click) {
            middle_click = 0;
            int hx, hy, hz;
            int hw = hit_test(chunks, chunk_count, 0, x, y, z, rx, ry,
                &hx, &hy, &hz);
            if (is_selectable(hw)) {
                block_type = hw;
            }
        }

        if (teleport) {
            teleport = 0;
            if (player_count) {
                int index = rand_int(player_count);
                Player *player = players + index;
                x = player->x; y = player->y; z = player->z;
                rx = player->rx; ry = player->ry;
                ensure_chunks(chunks, &chunk_count, x, y, z, 1);
            }
        }

        client_position(x, y, z, rx, ry);
        char buffer[RECV_BUFFER_SIZE];
        while (client_recv(buffer, RECV_BUFFER_SIZE)) {
            float ux, uy, uz, urx, ury;
            if (sscanf(buffer, "U,%*d,%f,%f,%f,%f,%f",
                &ux, &uy, &uz, &urx, &ury) == 5)
            {
                x = ux; y = uy; z = uz; rx = urx; ry = ury;
                ensure_chunks(chunks, &chunk_count, x, y, z, 1);
                y = highest_block(chunks, chunk_count, x, z) + 2;
            }
            int bp, bq, bx, by, bz, bw;
            if (sscanf(buffer, "B,%d,%d,%d,%d,%d,%d",
                &bp, &bq, &bx, &by, &bz, &bw) == 6)
            {
                _set_block(chunks, chunk_count, bp, bq, bx, by, bz, bw);
                if (player_intersects_block(2, x, y, z, bx, by, bz)) {
                    y = highest_block(chunks, chunk_count, x, z) + 2;
                }
            }
            int pid;
            float px, py, pz, prx, pry;
            if (sscanf(buffer, "P,%d,%f,%f,%f,%f,%f",
                &pid, &px, &py, &pz, &prx, &pry) == 6)
            {
                Player *player = find_player(players, player_count, pid);
                if (!player && player_count < MAX_PLAYERS) {
                    player = players + player_count;
                    player_count++;
                    player->id = pid;
                    player->position_buffer = 0;
                    player->normal_buffer = 0;
                    player->uv_buffer = 0;
                }
                if (player) {
                    update_player(player, px, py, pz, prx, pry);
                }
            }
            if (sscanf(buffer, "D,%d", &pid) == 1) {
                delete_player(players, &player_count, pid);
            }
            if (buffer[0] == 'T' && buffer[1] == ',') {
                char *text = buffer + 2;
                printf("%s\n", text);
                snprintf(
                    messages[message_index], TEXT_BUFFER_SIZE, "%s", text);
                message_index = (message_index + 1) % MAX_MESSAGES;
            }
        }

        int p = chunked(x);
        int q = chunked(z);
        ensure_chunks(chunks, &chunk_count, x, y, z, 0);

        // RENDER 3-D SCENE //

        glClear(GL_COLOR_BUFFER_BIT);
        glClear(GL_DEPTH_BUFFER_BIT);
        set_matrix_3d(matrix, width, height, x, y, z, rx, ry, fov, ortho);

        // render chunks
        glUseProgram(block_program);
        glUniformMatrix4fv(matrix_loc, 1, GL_FALSE, matrix);
        glUniform3f(camera_loc, x, y, z);
        glUniform1i(sampler_loc, 0);
        glUniform1f(timer_loc, glfwGetTime());
        for (int i = 0; i < chunk_count; i++) {
            Chunk *chunk = chunks + i;
            if (chunk_distance(chunk, p, q) > RENDER_CHUNK_RADIUS) {
                continue;
            }
            if (y < 100 && !chunk_visible(chunk, matrix)) {
                continue;
            }
            draw_chunk(chunk, position_loc, normal_loc, uv_loc);
        }

        // render players
        for (int i = 0; i < player_count; i++) {
            Player *player = players + i;
            draw_player(player, position_loc, normal_loc, uv_loc);
        }

        // render focused block wireframe
        int hx, hy, hz;
        int hw = hit_test(
            chunks, chunk_count, 0, x, y, z, rx, ry, &hx, &hy, &hz);
        if (is_obstacle(hw)) {
            glUseProgram(line_program);
            glLineWidth(1);
            glEnable(GL_COLOR_LOGIC_OP);
            glUniformMatrix4fv(line_matrix_loc, 1, GL_FALSE, matrix);
            GLuint wireframe_buffer = gen_wireframe_buffer(hx, hy, hz, 0.51);
            draw_lines(wireframe_buffer, line_position_loc, 3, 48);
            glDeleteBuffers(1, &wireframe_buffer);
            glDisable(GL_COLOR_LOGIC_OP);
        }

        // RENDER 2-D HUD PARTS //

        glClear(GL_DEPTH_BUFFER_BIT);
        set_matrix_2d(matrix, width, height);

        // render crosshairs
        glUseProgram(line_program);
        glLineWidth(4);
        glEnable(GL_COLOR_LOGIC_OP);
        glUniformMatrix4fv(line_matrix_loc, 1, GL_FALSE, matrix);
        GLuint crosshair_buffer = gen_crosshair_buffer(width, height);
        draw_lines(crosshair_buffer, line_position_loc, 2, 4);
        glDeleteBuffers(1, &crosshair_buffer);
        glDisable(GL_COLOR_LOGIC_OP);

        // render text
        glUseProgram(text_program);
        glUniformMatrix4fv(text_matrix_loc, 1, GL_FALSE, matrix);
        glUniform1i(text_sampler_loc, 1);
        char text_buffer[1024];
        float ts = 12;
        float tx = ts / 2;
        float ty = height - ts;
        snprintf(
            text_buffer, 1024, "%d, %d, %.2f, %.2f, %.2f [%d, %d]",
            p, q, x, y, z, player_count, chunk_count);
        print(
            text_position_loc, text_uv_loc,
            tx, ty, ts, text_buffer);
        for (int i = 0; i < MAX_MESSAGES; i++) {
            int index = (message_index + i) % MAX_MESSAGES;
            if (strlen(messages[index])) {
                ty -= ts * 2;
                print(
                    text_position_loc, text_uv_loc,
                    tx, ty, ts, messages[index]);
            }
        }
        if (typing) {
            ty -= ts * 2;
            snprintf(text_buffer, 1024, "> %s", typing_buffer);
            print(
                text_position_loc, text_uv_loc,
                tx, ty, ts, text_buffer);
        }

        // RENDER 3-D HUD PARTS //

        set_matrix_item(matrix, width, height);

        // render selected item
        if (block_type != previous_block_type) {
            previous_block_type = block_type;
            if (is_plant(block_type)) {
                gen_plant_buffers(
                    &item_position_buffer, &item_normal_buffer, &item_uv_buffer,
                    0, 0, 0, 0.5, block_type);
            }
            else {
                gen_cube_buffers(
                    &item_position_buffer, &item_normal_buffer, &item_uv_buffer,
                    0, 0, 0, 0.5, block_type);
            }
        }
        glUseProgram(block_program);
        glUniformMatrix4fv(matrix_loc, 1, GL_FALSE, matrix);
        glUniform3f(camera_loc, 0, 0, 5);
        glUniform1i(sampler_loc, 0);
        glUniform1f(timer_loc, glfwGetTime());
        if (is_plant(block_type)) {
            draw_plant(
                item_position_buffer, item_normal_buffer, item_uv_buffer,
                position_loc, normal_loc, uv_loc);
        }
        else {
            draw_cube(
                item_position_buffer, item_normal_buffer, item_uv_buffer,
                position_loc, normal_loc, uv_loc);
        }

        // swap buffers
        glfwSwapBuffers(window);
        glfwPollEvents();
    }
    client_stop();
    db_save_state(x, y, z, rx, ry);
    db_close();
    glfwTerminate();
    return 0;
}