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nyan.c
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nyan.c
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#include <gb/gb.h>
#include <stdio.h>
#include "cat.c" // Load Nyan Cat sprites
#include "christmas.c"
#include "gameboy.c"
#include "tac.c"
#include "rainbow.c" // Load rainbow sprites
#include "title.c" // Load title screen background
#include "gbt_player.h" //Load GBT Player
extern const unsigned char * song_Data[];
static int fc = 0; // Basically a "counter"
static int titleFin = 0; // There are no booleans
static int selection = 1; // Nyan Cat style selected
static int abPressed = 0; // Keep track of if the dpad is pressed (to prevent Nyan Cat from changing style while held down)
static int x = 70; // X and Y coords of Nyan Cat
static int y = 70;
static int c = 0; // Counter so Nyan Cat knows what frame of animation it is on
void title(); // Make C happy!
void nyanCat();
void initialiseNyanCat();
void main() {
SHOW_BKG;
SHOW_SPRITES;
set_bkg_data(0, 94, tiledata); // Set title screen background
while(1) { // Main "game" loop
wait_vbl_done();
fc++;
if (titleFin == 0) { // Check if the title screen has finished
title();
} else {
nyanCat();
}
}
}
void title() {
if (fc == 30) {
set_bkg_tiles(0, 0, 20, 18, tilemap); // Set background to show "PRESS START"
} else if (fc == 60) {
set_bkg_tiles(0, 0, 20, 18, tilemapBlank); // Set background to hide "PRESS START"
fc = 0;
}
if (joypad() & J_START || joypad() & J_A) { // Check if Start or A button is pressed
fc = 0;
titleFin = 1;
HIDE_BKG;
initialiseNyanCat();
}
}
void nyanCat() {
gbt_update(); // Music
if (joypad() & J_A && abPressed == 0) { // If AB are pressed up and AB weren't already pressed
selection++; // Up selection by one
if (selection == 5) { // If selection
set_sprite_data(0, 96, cat);
selection = 1;
} else if (selection == 2) {
set_sprite_data(0, 96, gameboy);
} else if (selection == 3) {
set_sprite_data(0, 96, christmas);
} else if (selection == 4) {
set_sprite_data(0, 96, tac);
}
abPressed = 1; // Set the AB buttons to "pressed"
}
if (joypad() & J_B && abPressed == 0) {
selection--;
if (selection == 0) {
set_sprite_data(0, 96, tac);
selection = 4;
} else if (selection == 1) {
set_sprite_data(0, 96, cat);
} else if (selection == 2) {
set_sprite_data(0, 96, gameboy);
} else if (selection == 3) {
set_sprite_data(0, 96, christmas);
}
abPressed = 1;
}
abPressed = joypad() & (J_A | J_B);
// Change coords on dpad press
if (joypad() & J_UP) { // The "&" is there to check if "J_UP" is one of the things returned by "joypad()"
y--; // You have to use "&" here because "==" will only work when one dpad direction is pressed
if (y == 9) { // To prevent Nyan Cat from going off-screen
y = 10;
}
}
if (joypad() & J_DOWN) {
y++;
if (y == 135) {
y = 134;
}
}
if (joypad() & J_LEFT) {
x--;
if (x == 7) {
x = 8;
}
}
if (joypad() & J_RIGHT) {
x++;
if (x == 137) {
x = 136;
}
}
// Update position of sprite
move_sprite(0, x, y);
move_sprite(1, x + 8, y);
move_sprite(2, x, y + 16);
move_sprite(3, x + 8, y + 16);
move_sprite(4, x + 16, y);
move_sprite(5, x + 24, y);
move_sprite(6, x + 16, y + 16);
move_sprite(7, x + 24, y + 16);
if (fc % 5 == 0) { // If there is no remainder
// Nyan Cat Sprite
set_sprite_tile(0, 0 + (16 * c));
set_sprite_tile(1, 3 + (16 * c));
set_sprite_tile(2, 4 + (16 * c));
set_sprite_tile(3, 6 + (16 * c));
set_sprite_tile(4, 8 + (16 * c));
set_sprite_tile(5, 11 + (16 * c));
set_sprite_tile(6, 12 + (16 * c));
set_sprite_tile(7, 14 + (16 * c));
c++;
if (c == 6) { // Check if Nyan Cat's frame counter is 6
c = 0;
}
}
// Rainbow Sprite
// if ((fc == 19)) { // When the counter reaches 19 change frame of the rainbow
// set_sprite_tile(8, 112);
// set_sprite_tile(9, 114);
// set_sprite_tile(10, 116);
// set_sprite_tile(11, 118);
// set_sprite_tile(12, 120);
// set_sprite_tile(13, 122);
// set_sprite_tile(14, 124);
// set_sprite_tile(15, 126);
// } else if (fc == 39) { // When the counter reaches 39 revert frame of the rainbow
// set_sprite_tile(8, 96);
// set_sprite_tile(9, 98);
// set_sprite_tile(10, 100);
// set_sprite_tile(11, 102);
// set_sprite_tile(12, 104);
// set_sprite_tile(13, 106);
// set_sprite_tile(14, 108);
// set_sprite_tile(15, 110);
// }
if (fc == 40) { // Reset counter when it reaches 40
fc = 0;
}
}
void initialiseNyanCat() { // Setup Nyan Cat (and rainbow trail)
// Play music
disable_interrupts();
gbt_play(song_Data, 2, 7);
gbt_loop(1);
set_interrupts(VBL_IFLAG);
enable_interrupts();
// Nyan Cat Sprite
SPRITES_8x16;
set_sprite_data(0, 96, cat);
set_sprite_tile(0, 0);
move_sprite(0, x, y);
set_sprite_tile(1, 3);
move_sprite(1, x + 8, y);
set_sprite_tile(2, 4);
move_sprite(2, x, y + 16);
set_sprite_tile(3, 6);
move_sprite(3, x + 8, y + 16);
set_sprite_tile(4, 8);
move_sprite(4, x + 16, y);
set_sprite_tile(5, 11);
move_sprite(5, x + 24, y);
set_sprite_tile(6, 12);
move_sprite(6, x + 16, y + 16);
set_sprite_tile(7, 14);
move_sprite(7, x + 24, y + 16);
// Rainbow Sprite
// SPRITES_8x16;
// set_sprite_data(96, 32, rainbow);
// set_sprite_tile(8, 96);
// move_sprite(8, 3, y);
// set_sprite_tile(9, 98);
// move_sprite(9, 3 + 8, y);
// set_sprite_tile(10, 100);
// move_sprite(10, 3, y + 16);
// set_sprite_tile(11, 102);
// move_sprite(11, 3 + 8 , y + 16);
// set_sprite_tile(12, 104);
// move_sprite(12, 3 + 16, y);
// set_sprite_tile(13, 106);
// move_sprite(13, 3 + 24, y);
// set_sprite_tile(14, 108);
// move_sprite(14, 3 + 16, y + 16);
// set_sprite_tile(15, 110);
// move_sprite(15, 3 + 24, y + 16);
// set_sprite_tile(16, 96);
// move_sprite(16, 3 + 26, y);
// set_sprite_tile(17, 98);
// move_sprite(17, 3 + 26 + 8, y);
// set_sprite_tile(18, 100);
// move_sprite(18, 3 + 26, y + 16);
// set_sprite_tile(19, 102);
// move_sprite(19, 3 + 26 + 8 , y + 16);
// set_sprite_tile(20, 104);
// move_sprite(20, 3 + 26 + 16, y);
// set_sprite_tile(21, 106);
// move_sprite(21, 3 + 26 + 24, y);
// set_sprite_tile(22, 108);
// move_sprite(22, 3 + 26 + 16, y + 16);
// set_sprite_tile(23, 110);
// move_sprite(23, 3 + 26 + 24, y + 16);
}