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gb_pocket_league.c
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gb_pocket_league.c
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#include <gb/gb.h>
#include <gb/console.h>
#include <gb/font.h>
#include <stdio.h>
#include <rand.h>
#include <stdlib.h>
#include "sprites/car.c"
#include "sprites/boost.c"
#include "sprites/player_tags.c"
#include "sprites/ball.c"
#include "sprites/cursor.c"
#include "sprites/numbers.c"
// Debug pixels for hitboxes
#include "sprites/pixel.c"
#include "backgrounds/title.h"
#include "backgrounds/arena.h"
#define CPU_DISABLED 0 // Debug flag, 1 disables CPU inputs
#define HITBOXES_ENABLED 0 // Weird things can happen, use at risk
#define FLOOR 140u
#define CEILING 24u
#define GAME_SPEED 3 // Higher is slower
#define BALL_FLOOR 136u
#define MAX_SCORE 5
#define ARENA_X_MIN 16
#define ARENA_X_MAX 144
#define GOAL_Y_MIN 53
#define GOAL_Y_MAX 83
#define SCORE_Y_POS 93
#define GRAVITY 1
#define JUMP_ACCELERATION 10
#define ACCELERATION 1
#define ROTATION_SPEED 15
#define BOOST_ACCELERATION 1
#define GOAL_EXPL_VELOCITY 15
#define NUM_CARS 2
#define CAR_1_START_X 20
#define CAR_1_START_y 136
#define CAR_2_START_X 140
#define CAR_2_START_Y 136
#define COUNTDOWN_X 84
#define COUNTDOWN_Y 60
#define BALL_START_X 80
#define BALL_VELOCITY 2
#define BALL_BUMP_VERT 7 // Slight upward velocity for hitting the ball
#define BOUNCE_DECAY 5
#define CPU_PREDICTION 5 // How many ticks to spend predicting ball position
typedef enum {
TITLE,
GAME,
CREDITS,
PLAYER_WINS,
CPU_WINS
} screen_t;
const unsigned char fade_palettes[] = {
0xFFU, 0xFEU, 0xF9U, 0xE4U,
};
void load_font() {
font_init();
font_t credits_font;
credits_font = font_load(font_ibm);
font_set(credits_font);
}
UINT8 rotation_quadrant(UINT8 rot) {
return rot / 32;
}
/* Rolls the car clockwise based on *rot* param (INT8 0 - 255) */
void draw_car_roll(INT8 n, UINT8 rot) {
UINT8 quadrant = rotation_quadrant(rot);
UINT8 invert_x = 0;
UINT8 invert_y = 0;
unsigned char sprites[];
if (quadrant == 0) // Car hood up, facing right
{
if (n == 0) {
unsigned char sprites[] = { 0, 1, 2, 3 };
} else
{
unsigned char sprites[] = { 2, 3, 0, 1};
invert_x = 1;
}
}
else if (quadrant == 1) // Car hood up, facing downward right
{
if (n == 0) {
unsigned char sprites[] = { 12, 13, 14, 15 };
} else {
unsigned char sprites[] = { 6, 7, 4, 5 };
invert_x = 1;
}
}
else if (quadrant == 2) // Car hood facing right, nose down
{
if (n == 0) {
unsigned char sprites[] = { 11, 10, 9, 8 };
invert_x = 1;
invert_y = 1;
} else {
unsigned char sprites[] = { 10, 11, 8, 9 };
invert_x = 1;
}
}
else if (quadrant == 3) // Car hood down, facing downward left
{
if (n == 0) {
unsigned char sprites[] = { 20, 21, 22, 23 };
} else {
unsigned char sprites[] = { 18, 19, 16, 17 };
invert_x = 1;
}
}
else if (quadrant == 4) // Car hood down, facing left
{
if (n == 0) {
unsigned char sprites[] = { 3, 2, 1, 0 };
invert_x = 1;
invert_y = 1;
} else {
unsigned char sprites[] = { 1, 0, 3, 2 };
invert_y = 1;
}
}
else if (quadrant == 5) // Car hood down, facing upward left
{
if (n == 0) {
unsigned char sprites[] = { 16, 17, 18, 19 };
} else {
unsigned char sprites[] = { 22, 23, 20, 21 };
invert_x = 1;
}
}
else if (quadrant == 6) // Car hood facing left, nose up
{
if (n == 0) {
unsigned char sprites[] = { 8, 9, 10, 11 };
} else {
unsigned char sprites[] = { 9, 8, 11, 10 };
invert_y = 1;
}
}
else if (quadrant == 7) // Car hood up, facing upward right
{
if (n == 0) {
unsigned char sprites[] = { 4, 5, 6, 7 };
} else {
unsigned char sprites[] = { 17, 16, 19, 18 };
invert_y = 1;
}
}
else // Default
{
if (n == 0) {
unsigned char sprites[] = { 0, 1, 2, 3 };
} else
{
unsigned char sprites[] = { 2, 3, 0, 1};
invert_x = 1;
}
}
for (INT8 i = 0; i < 4; i++) {
set_sprite_tile(i + (5 * n), sprites[i]);
if (invert_y) {
set_sprite_prop(i + (5 * n), get_sprite_prop(i + (5 * n)) | S_FLIPY);
} else {
set_sprite_prop(i + (5 * n), get_sprite_prop(i + (5 * n)) & ~S_FLIPY);
}
if (invert_x) {
set_sprite_prop(i + (5 * n), get_sprite_prop(i + (5 * n)) | S_FLIPX);
} else {
set_sprite_prop(i + (5 * n), get_sprite_prop(i + (5 * n)) & ~S_FLIPX);
}
}
}
void draw_boost_sprite(UINT8 n, UINT8 x, UINT8 y, UINT8 rot, UINT8 t) {
UINT8 game_spr = (n * 5) + 4;
UINT8 spr_num = 25;
INT8 x_o = 0;
INT8 y_o = 0;
UINT8 tick_prop = 0x00;
UINT8 mod_prop = 0x00;
UINT8 quadrant = rotation_quadrant(rot);
unsigned char cpu_offset[] = { 4, 5, 6, 7, 0, 1, 2, 3 };
if (n == 1) {
quadrant = cpu_offset[quadrant];
}
if (quadrant == 0) // Car hood up, facing right
{
x_o = -8;
y_o = 4;
tick_prop = S_FLIPY;
}
else if (quadrant == 1) // Car hood up, facing downward right
{
spr_num = t ? 26 : 27;
x_o = -4;
y_o = -4;
mod_prop = S_FLIPY;
}
else if (quadrant == 2) // Car hood facing right, nose down
{
spr_num = 28;
x_o = 4;
y_o = -8;
tick_prop = S_FLIPX;
mod_prop = S_FLIPY;
}
else if (quadrant == 3) // Car hood down, facing downward left
{
spr_num = t ? 26 : 27;
x_o = 12;
y_o = -4;
mod_prop = S_FLIPY | S_FLIPX;
}
else if (quadrant == 4) // Car hood down, facing left
{
x_o = 16;
y_o = 4;
tick_prop = S_FLIPY;
mod_prop = S_FLIPX;
}
else if (quadrant == 5) // Car hood down, facing upward left
{
spr_num = t ? 26 : 27;
x_o = 12;
y_o = 12;
mod_prop = S_FLIPX;
}
else if (quadrant == 6) // Car hood facing left, nose up
{
spr_num = 28;
x_o = 4;
y_o = 16;
tick_prop = S_FLIPX;
}
else if (quadrant == 7) // Car hood up, facing upward right
{
spr_num = t ? 26 : 27;
x_o = -4;
y_o = 12;
}
set_sprite_tile(game_spr, spr_num);
move_sprite(game_spr, x + x_o, y + y_o);
set_sprite_prop(game_spr, mod_prop);
if (t) {
set_sprite_prop(game_spr, get_sprite_prop(game_spr) | tick_prop);
} else {
set_sprite_prop(game_spr, get_sprite_prop(game_spr) & ~tick_prop);
}
}
void kill_boost_sprite(UINT8 n) {
move_sprite((n * 5) + 4, 255, 255); // offscreen
}
void calculate_ball_hitbox(UINT8 x, UINT8 y, UINT8 *x1, UINT8 *y1, UINT8 *x2, UINT8 *y2) {
*x1 = x;
*x2 = x + 15;
*y1 = y;
*y2 = y + 15;
}
UINT8 * calculate_car_hitbox(UINT8 x, UINT8 y, UINT8 rot) {
UINT8 quadrant = rotation_quadrant(rot);
UINT8 hitbox[12] = {
255, 255, 255, 255,
255, 255, 255, 255,
255, 255, 255, 255
};
if (quadrant == 0 || quadrant == 4) {
hitbox[0] = x;
hitbox[1] = x + 15;
hitbox[2] = y + 6;
hitbox[3] = y + 10;
}
else if (quadrant == 1 || quadrant == 5) {
hitbox[0] = x + 2;
hitbox[1] = x + 8;
hitbox[2] = y + 1;
hitbox[3] = y + 7;
hitbox[4] = x + 5;
hitbox[5] = x + 11;
hitbox[6] = y + 4;
hitbox[7] = y + 11;
hitbox[8] = x + 8;
hitbox[9] = x + 13;
hitbox[10] = y + 10;
hitbox[11] = y + 14;
}
else if (quadrant == 3 || quadrant == 7) {
hitbox[0] = x + 8;
hitbox[1] = x + 14;
hitbox[2] = y + 2;
hitbox[3] = y + 6;
hitbox[4] = x + 4;
hitbox[5] = x + 11;
hitbox[6] = y + 4;
hitbox[7] = y + 11;
hitbox[8] = x + 1;
hitbox[9] = x + 6;
hitbox[10] = y + 10;
hitbox[11] = y + 13;
}
else if (quadrant == 2 || quadrant == 6) {
hitbox[0] = x + 6;
hitbox[1] = x + 10;
hitbox[2] = y;
hitbox[3] = y + 15;
}
return hitbox;
}
void draw_car_hitbox(UINT8 x, UINT8 y, UINT8 rot) {
UINT8 *hitbox;
hitbox = calculate_car_hitbox(x, y, rot);
for (INT8 i = 0; i < 3; i++) {
for (INT8 j = 0; j < 4; j++) {
set_sprite_tile(23 + (4 * i) + j, 47);
move_sprite(23 + (4 * i), hitbox[4 * i ], hitbox[4 * i + 2]);
move_sprite(24 + (4 * i), hitbox[4 * i ], hitbox[4 * i + 3]);
move_sprite(25 + (4 * i), hitbox[4 * i + 1], hitbox[4 * i + 2]);
move_sprite(26 + (4 * i), hitbox[4 * i + 1], hitbox[4 * i + 3]);
}
}
move_sprite(14, 255, 255); // Move player tag offscreen
}
void draw_ball_hitbox(UINT8 x, UINT8 y) {
UINT8 x1 = x;
UINT8 x2 = x;
UINT8 y1 = y;
UINT8 y2 = y;
calculate_ball_hitbox(x, y, &x1, &y1, &x2, &y2);
for (INT8 i = 0; i < 4; i++) {
set_sprite_tile(i + 19, 47);
}
move_sprite(19, x1, y1);
move_sprite(20, x1, y2);
move_sprite(21, x2, y1);
move_sprite(22, x2, y2);
}
void move_car_sprite(UINT8 n, UINT8 x, UINT8 y, UINT8 rot) {
INT8 spr_offset = n * 5;
move_sprite(0 + spr_offset, x, y );
move_sprite(1 + spr_offset, x, y + 8);
move_sprite(2 + spr_offset, x + 8, y );
move_sprite(3 + spr_offset, x + 8, y + 8);
if (n == 0) {
move_sprite(14, x + 4, y + 12);
} else {
move_sprite(15, x + 4, y + 12);
}
draw_car_roll(n, rot);
}
void initialize_cars(INT8 n) {
set_sprite_data(0, 24, car);
set_sprite_data(25, 4, boost);
set_sprite_data(32, 2, player_tags);
for(INT8 i = 0; i < n; i++) {
for(INT8 j = 0; j < 4; j++) {
set_sprite_tile(j + (5 * i), j);
if (i % 2 == 1) {
set_sprite_prop(j + (5 * i), S_FLIPX);
}
}
if (i == 0) {
set_sprite_tile(14, 32); // Player Tag 1
move_car_sprite(i, CAR_1_START_X, CAR_1_START_y, 0);
}
else if (i == 1) {
set_sprite_tile(15, 33); // Player Tag 2
move_car_sprite(i, CAR_2_START_X, CAR_2_START_Y, 0);
}
}
}
INT8 debounced_input(INT8 target, INT8 new, INT8 old) {
return (new & target) && !(old & target);
}
void move_ball_sprite(UINT8 x, UINT8 y, INT8 t) {
UINT8 sprite_start = NUM_CARS * 5;
for (INT8 i = 0; i < 4; i++) {
set_sprite_tile(sprite_start + i, t % 2 == 0 ? 30 : 31);
}
move_sprite(sprite_start, x, y);
move_sprite(sprite_start + 1, x, y + 8);
set_sprite_prop(sprite_start + 1, S_FLIPY);
move_sprite(sprite_start + 2, x + 8, y);
set_sprite_prop(sprite_start + 2, S_FLIPX);
move_sprite(sprite_start + 3, x + 8, y + 8);
set_sprite_prop(sprite_start + 3, S_FLIPY | S_FLIPX);
}
void initialize_ball() {
set_sprite_data(30, 2, ball);
move_ball_sprite(BALL_START_X, BALL_FLOOR, 0);
}
void initialize_cursor() {
// Set the data
set_sprite_data(0, 1, cursor);
// Set the tile to the sprite
set_sprite_tile(0, 0);
// Kill any leftover properties
set_sprite_prop(0, 0x00);
}
void initialize_score(UINT8 plr_score, UINT8 cpu_score) {
set_sprite_data(34, 12, numbers);
set_sprite_tile(17, 40 + plr_score);
set_sprite_tile(18, 40 + cpu_score);
move_sprite(17, 8, SCORE_Y_POS + 8);
move_sprite(18, 160, SCORE_Y_POS + 8);
}
void initialize_countdown() {
set_sprite_tile(16, 36);
move_sprite(16, COUNTDOWN_X, COUNTDOWN_Y);
}
void initialize_title_background() {
set_bkg_data(0x0, title_tile_count, title_tile_data);
set_bkg_tiles(0, 0, title_tile_map_width, title_tile_map_height, title_map_data);
}
void initialize_game_background() {
set_bkg_data(0x0, arena_tile_count, arena_tile_data);
set_bkg_tiles(0, 0, arena_tile_map_width, arena_tile_map_height, arena_map_data);
}
void calculate_boost_velocity_vectors(UINT8 n, UINT8 rot, INT8 *d_x, INT8 *d_y) {
UINT8 quadrant = rotation_quadrant(rot);
INT8 x_mod = 0;
INT8 y_mod = 0;
if (quadrant == 0) // Car hood up, facing right
{
x_mod = 1;
}
else if (quadrant == 1) // Car hood up, facing downward right
{
x_mod = 1;
y_mod = 1;
}
else if (quadrant == 2) // Car hood facing right, nose down
{
y_mod = 1;
}
else if (quadrant == 3) // Car hood down, facing downward left
{
x_mod = -1;
y_mod = 1;
}
else if (quadrant == 4) // Car hood down, facing left
{
x_mod = -1;
}
else if (quadrant == 5) // Car hood down, facing upward left
{
x_mod = -1;
y_mod = -1;
}
else if (quadrant == 6) // Car hood facing left, nose up
{
y_mod = -1;
}
else if (quadrant == 7) // Car hood up, facing upward right
{
x_mod = 1;
y_mod = -1;
}
else // Default
{
}
if (n == 1) {
x_mod *= -1;
}
*d_x += BOOST_ACCELERATION * x_mod;
*d_y += BOOST_ACCELERATION * y_mod;
}
UINT8 max(UINT8 a, UINT8 b) {
if (a > b) {
return a;
} else {
return b;
}
}
UINT8 min(UINT8 a, UINT8 b) {
if (a < b) {
return a;
} else {
return b;
}
}
UINT8 detect_collision(UINT8 x, UINT8 y, UINT8 rot, UINT8 ball_x, UINT8 ball_y) {
UINT8 *car_hitbox;
car_hitbox = calculate_car_hitbox(x, y, rot);
UINT8 ball_x1;
UINT8 ball_x2;
UINT8 ball_y1;
UINT8 ball_y2;
calculate_ball_hitbox(ball_x, ball_y, &ball_x1, &ball_y1, &ball_x2, &ball_y2);
for (INT8 i = 0; i < 3; i++) { // Iterate through the possible hitboxes
if (car_hitbox[4 * i] == 255) { // Blank hitbox
continue;
}
if (car_hitbox[4 * i + 1] >= ball_x1 && car_hitbox[4 * i] <= ball_x2) {
if (car_hitbox[4 * i + 3] >= ball_y1 && car_hitbox[4 * i + 2] <= ball_y2) {
return 1;
}
}
}
return 0; // Default to FALSE
}
UINT8 calculate_ball_velocity_vectors(UINT8 x, UINT8 y, INT8 d_x, INT8 d_y, UINT8 rot, UINT8 ball_x, UINT8 ball_y, INT8 *ball_d_x, INT8 *ball_d_y) {
UINT8 collision = detect_collision(x, y, rot, ball_x, ball_y);
if (collision) {
*ball_d_x = d_x * BALL_VELOCITY;
*ball_d_y = d_y - (BALL_BUMP_VERT * abs(d_x) / 10);
}
return collision;
}
UINT8 int_distance(UINT8 x, UINT8 y) {
if (x > y) {
return x - y;
} else {
return y - x;
}
}
void tick_car_physics(UINT8 n, UINT8 *x, UINT8 *y, INT8 *d_x, INT8 *d_y, UINT8 *rot, UINT8 input1, UINT8 input2) {
// Jump
if (debounced_input(J_A, input1, input2) && *y == FLOOR) {
*d_y = -JUMP_ACCELERATION;
}
// Drive
if (*y == FLOOR) {
*rot = 0;
if (input1 & J_RIGHT) {
*d_x += ACCELERATION;
}
else if (input1 & J_LEFT) {
*d_x -= ACCELERATION;
}
else if (!(input1 & J_B)) {
if (*d_x > 0) {
*d_x -= ACCELERATION;
if (*d_x <= 0) {
*d_x = 0;
}
}
if (*d_x < 0) {
*d_x += ACCELERATION;
if (*d_x >= 0) {
*d_x = 0;
}
}
}
}
else {
if (input1 & J_RIGHT) {
*rot += ROTATION_SPEED;
}
else if (input1 & J_LEFT) {
*rot -= ROTATION_SPEED;
}
}
if (input1 & J_B) {
calculate_boost_velocity_vectors(n, *rot, d_x, d_y);
}
*x += *d_x;
*y += *d_y;
if (*x >= ARENA_X_MAX) {
*x = ARENA_X_MAX;
*d_x = 0;
}
else if (*x <= ARENA_X_MIN) {
*x = ARENA_X_MIN;
*d_x = 0;
}
if (*y >= FLOOR) {
*y = FLOOR;
*d_y = 0;
}
else if (*y < FLOOR) {
*d_y += GRAVITY;
}
if (*y < CEILING) {
*y = CEILING;
*d_y = 0;
}
}
void tick_ball_physics(
UINT8 *ball_x_pos, UINT8 *ball_y_pos, INT8 *ball_d_x, INT8 *ball_d_y,
UINT8 plr_x_pos, UINT8 plr_y_pos, INT8 plr_d_x, INT8 plr_d_y, UINT8 plr_rot,
UINT8 cpu_x_pos, UINT8 cpu_y_pos, INT8 cpu_d_x, INT8 cpu_d_y, UINT8 cpu_rot,
UINT8 skip_collision_checks
) {
if (*ball_d_x > 0) {
if (*ball_d_x - ACCELERATION >= 0) {
*ball_d_x -= ACCELERATION;
}
else {
*ball_d_x = 0;
}
}
else if (*ball_d_x < 0) {
if (*ball_d_x + ACCELERATION <= 0) {
*ball_d_x += ACCELERATION;
}
else {
*ball_d_x = 0;
}
}
*ball_d_y += GRAVITY;
if (*ball_y_pos + *ball_d_y > BALL_FLOOR) {
*ball_y_pos = BALL_FLOOR;
*ball_d_y = (*ball_d_y * -1) + (BOUNCE_DECAY * GRAVITY);
if (*ball_d_y > 0) {
*ball_d_y = 0;
}
}
else if (*ball_y_pos + *ball_d_y < CEILING) {
*ball_d_y *= -1;
*ball_y_pos = CEILING;
}
if (!skip_collision_checks) {
UINT8 player_collision = calculate_ball_velocity_vectors(cpu_x_pos, cpu_y_pos, cpu_d_x, cpu_d_y, cpu_rot, *ball_x_pos, *ball_y_pos, ball_d_x, ball_d_y);
UINT8 cpu_collision = calculate_ball_velocity_vectors(plr_x_pos, plr_y_pos, plr_d_x, plr_d_y, plr_rot, *ball_x_pos, *ball_y_pos, ball_d_x, ball_d_y);
if (player_collision && cpu_collision) { // Pinch!
*ball_d_x += (plr_d_x + cpu_d_x);
*ball_d_y += (plr_d_y + cpu_d_y);
}
}
UINT8 in_goal = (*ball_y_pos > GOAL_Y_MIN && *ball_y_pos < GOAL_Y_MAX);
if (!in_goal) { // Goal conditions! Skip overflow checks and keep the ball moving.
// Handle overflow errors
if (abs(*ball_d_x) >= *ball_x_pos && *ball_d_x < 0) {
*ball_x_pos = ARENA_X_MIN;
*ball_d_x *= -1;
}
else if (*ball_d_x + *ball_x_pos > 255) {
*ball_x_pos = ARENA_X_MAX;
*ball_d_x *= -1;
}
} else {
if (abs(*ball_d_x) >= *ball_x_pos && *ball_d_x < 0) {
*ball_x_pos = 0;
*ball_d_x *= 0;
}
}
if (*ball_y_pos < abs(*ball_d_y) && *ball_d_y < 0) {
*ball_y_pos = CEILING;
*ball_d_y *= -1;
}
*ball_x_pos += *ball_d_x;
*ball_y_pos += *ball_d_y;
if (!in_goal) { // Goal conditions! Skip bounce checks and keep the ball moving.
if (*ball_x_pos > ARENA_X_MAX) {
*ball_x_pos = ARENA_X_MAX;
*ball_d_x *= -1;
}
else if (*ball_x_pos < ARENA_X_MIN) {
*ball_x_pos = ARENA_X_MIN;
*ball_d_x *= -1;
}
}
}
UINT8 calculate_ball_quadrant(UINT8 car_x, UINT8 car_y, UINT8 ball_x, UINT8 ball_y) {
if (car_x - 8 <= ball_x && car_x + 8 >= ball_x) {
if (car_y < ball_y) {
return 2;
} else {
return 6;
}
}
else if (car_y - 16 <= ball_y && car_y + 16 >= ball_y) {
if (car_x < ball_x) {
return 4;
} else {
return 0;
}
}
else if (car_y - 16 > ball_y) {
if (car_x < ball_x) {
return 3;
} else {
return 4;
}
}
else {
if (car_x < ball_x) {
return 5;
} else {
return 6;
}
}
}
INT8 calculate_cpu_input(UINT8 x, UINT8 y, UINT8 rot, UINT8 ball_x, UINT8 ball_y, INT8 ball_d_x, INT8 ball_d_y) {
UINT8 counter = 0;
UINT8 input = 0x00; // Nothing
UINT8 quadrant = 0;
while (counter < CPU_PREDICTION) {
tick_ball_physics(
&ball_x, &ball_y, &ball_d_x, &ball_d_y,
255, 255, 255, 255, 0,
255, 255, 255, 255, 0,
1 // skip collision checking
);
counter++;
}
if (int_distance(ball_y, y) < 15) { // Same Y value, should drive if on the floor
if (y == FLOOR) {
if (x < ball_x) {
input = J_RIGHT;
} else {
input = J_LEFT;
}
}
}
else if(int_distance(ball_y, y) >= 15) { // Not same Y, should jump or rotate
if (y == FLOOR && int_distance(ball_x, ball_y) < 20) { // On the floor and close
input = J_A;
} else {
if (ball_x > x) {
input = input | J_RIGHT;
} else {
input = input | J_LEFT;
}
}
}
quadrant = calculate_ball_quadrant(x, y, ball_x, ball_y);
if (rotation_quadrant(rot) == quadrant) {
input = input | J_B;
}
return input;
}
void hide_everything() {
for (UINT8 i = 0; i < 40; i++) {
move_sprite(i, 255, 255);
}
}
screen_t title() {
BGP_REG = fade_palettes[0];
OBP0_REG = OBP1_REG = 0xE4;
SPRITES_8x8;
INT8 key1 = joypad();
INT8 key2 = key1;
UINT8 cursor = 0;
screen_t next_screen = TITLE;
initialize_title_background();
// Fade in the title screen
// Hides the tile changes from credits
for (INT8 i = 0; i < 4; i++) {
BGP_REG = fade_palettes[i];
delay(25);
}
initialize_cursor();
SHOW_BKG; SHOW_SPRITES;
while(1) {
// Read the keys
key2 = key1;
key1 = joypad();
// Move the cursor
if (debounced_input(J_DOWN, key1, key2) && cursor != 1) {
cursor = 1;
}
if (debounced_input(J_UP, key1, key2) && cursor != 0) {
cursor = 0;
}
if (cursor == 0) {
move_sprite(0, 60, 77); // Start
}
else {
move_sprite(0, 51, 89); // Credits
}
// Check selection when start is pressed
if (debounced_input(J_START, key1, key2)) {
// Move the cursor off the screen
move_sprite(0, 255, 255);
if (cursor == 0) {
// Here we go!
next_screen = GAME;
return next_screen;
}
if (cursor == 1) {
// Credits
next_screen = CREDITS;
return next_screen;
}
}
}
}
screen_t credits() {
BGP_REG = OBP0_REG = OBP1_REG = 0xE4;
SPRITES_8x8;
// Make sure the font tiles are initialized in GB mem
load_font();
screen_t next_screen = TITLE;
INT8 key1 = joypad();
INT8 key2 = key1;
SHOW_BKG; SHOW_SPRITES;
printf(" POCKET LEAGUE(c) \n");
printf(" 2021 Tyler Porter \n");
printf(" \n");
printf(" Distributed under \n");
printf(" MIT License \n");
printf(" \n\n");
printf("https://github.com/ \n");
printf("ty-porter/ \n");
printf("gb-pocket-league ");
while(1) {
// Read the keys
key2 = key1;
key1 = joypad();
if (debounced_input(J_START, key1, key2) ) {
return next_screen;
}
}
}
screen_t game() {
BGP_REG = OBP0_REG = OBP1_REG = 0xE4;
SPRITES_8x8;
initialize_game_background();
initialize_cars(NUM_CARS);
initialize_ball();
if (HITBOXES_ENABLED) {
set_sprite_data(47, 1, pixel);
}
SHOW_BKG; SHOW_SPRITES;
INT8 key1 = 0x00;
INT8 key2 = 0x00;
INT8 cpu_key1 = 0x00;
INT8 cpu_key2 = 0x00;
INT8 plr_d_x = 0;
INT8 plr_d_y = 0;
INT8 cpu_d_x = 0;
INT8 cpu_d_y = 0;
INT8 ball_d_x = 0;
INT8 ball_d_y = 0;
UINT8 plr_x_pos = CAR_1_START_X;
UINT8 plr_y_pos = CAR_1_START_y;
UINT8 cpu_x_pos = CAR_2_START_X;
UINT8 cpu_y_pos = CAR_2_START_Y;
UINT8 ball_x_pos = BALL_START_X;
UINT8 ball_y_pos = BALL_FLOOR;
UINT8 plr_rot = 0;
UINT8 cpu_rot = 0;
UINT8 tick = 0;
UINT8 plr_goal = 0;
UINT8 cpu_goal = 0;
UINT8 score_flag = 0; // Not scored yet
UINT8 controls_enabled = 0; // Disable before countdown
UINT8 countdown = 3;
UINT8 reset_flag = 1; // Reset the game for next play
UINT8 reset_countdown = 0; // How long to wait before resetting