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- #include <SPI.h>
- #include <GD.h>
- #include "Wood32.h"
- #include "staunton.h" // Chess pieces from eboard's Staunton set: http://www.bergo.eng.br
- #define digits (sizeof(staunton_img) / 256)
- #include "digits.h"
- int atxy(int x, int y)
- {
- return (y << 6) + x;
- }
- static void square(byte x, byte y, byte light)
- {
- flash_uint8_t *src = Wood32_pic + (16 * light);
- int addr = atxy(x, y);
- GD.copy(addr + 0 * 64, src, 4);
- GD.copy(addr + 1 * 64, src + 4, 4);
- GD.copy(addr + 2 * 64, src + 8, 4);
- GD.copy(addr + 3 * 64, src + 12, 4);
- }
- #define QROOK 0
- #define QKNIGHT 1
- #define QBISHOP 2
- #define QUEEN 3
- #define KING 4
- #define KBISHOP 5
- #define KKNIGHT 6
- #define KROOK 7
- #define PAWN 8
- #define WHITE 0x00
- #define BLACK 0x10
- static char board[32];
- static void startboard()
- {
- byte i;
- for (i = 0; i < 8; i++) {
- board[i] = 56 + i;
- board[8+i] = 48 + i;
- board[16+i] = i;
- board[24+i] = 8 + i;
- }
- }
- // Return the piece at pos, or -1 if pos is empty
- static char find(byte pos)
- {
- byte slot;
- for (slot = 0; slot < 32; slot++)
- if (board[slot] == pos)
- return slot;
- return -1;
- }
- byte images[16] = { 0, 1, 2, 3, 4, 2, 1, 0, 5, 5, 5, 5, 5, 5, 5, 5 };
- static void piece(byte slot, int x, int y)
- {
- byte i = (4 * slot);
- byte j = images[slot & 0xf] * 2;
- byte bw = (slot >> 4) & 1;
- GD.sprite(i, x, y, j, bw, 0);
- GD.sprite(i + 1, x + 16, y, j + 1, bw, 0);
- GD.sprite(i + 2, x, y + 16, j + 12, bw, 0);
- GD.sprite(i + 3, x + 16, y + 16, j + 13, bw, 0);
- }
- #define BOARDX(pos) (8 + (((pos) & 7) << 5))
- #define BOARDY(pos) (24 + ((((pos) >> 3) & 7) << 5))
- static void drawboard()
- {
- byte slot;
- for (slot = 0; slot < 32; slot++) {
- char pos = board[slot];
- if (pos < 0)
- piece(slot, 400, 400);
- else {
- piece(slot, BOARDX(pos), BOARDY(pos));
- }
- }
- }
- static float smoothstep(float x)
- {
- return x*x*(3-2*x);
- }
- static int screenshot_i; // JCB
- // move piece 'slot' to position 'pos'.
- // return true if a piece was taken.
- static byte movepiece(byte slot, byte pos)
- {
- int x0 = BOARDX(board[slot]);
- int y0 = BOARDY(board[slot]);
- int x1 = BOARDX(pos);
- int y1 = BOARDY(pos);
- // move at 1.5 pix/frame
- int d = int(sqrt(pow(x0 - x1, 2) + pow(y0 - y1, 2)) / 2);
- int it;
- for (it = 0; it < d; it++) {
- float t = smoothstep(float(it) / d);
- GD.waitvblank();
- GD.waitvblank();
- // GD.screenshot(screenshot_i++); // JCB
- piece(slot, int(x0 + t * (x1 - x0)), int(y0 + t * (y1 - y0)));
- }
- byte taken = find(pos) != -1;
- if (taken)
- board[find(pos)] = -1;
- board[slot] = pos;
- drawboard();
- return taken;
- }
- void setup()
- {
- int i, j;
- Serial.begin(1000000); // JCB
- GD.begin();
- GD.ascii();
- GD.putstr(0, 0, "Chess board");
- GD.copy(RAM_CHR, Wood32_chr, sizeof(Wood32_chr));
- GD.copy(RAM_PAL, Wood32_pal, sizeof(Wood32_pal));
- GD.copy(RAM_SPRIMG, staunton_img, sizeof(staunton_img));
- GD.copy(RAM_SPRPAL, staunton_white, sizeof(staunton_white));
- GD.copy(RAM_SPRPAL + 512, staunton_black, sizeof(staunton_black));
- GD.copy(RAM_SPRIMG + (digits << 8), digits_img, sizeof(digits_img));
- GD.copy(RAM_SPRPAL + 2 * 512, digits_pal, sizeof(digits_pal));
- for (i = 0; i < 256; i++) {
- unsigned int b = GD.rd16(RAM_SPRPAL + 2 * 512 + 2 * i);
- GD.wr16(RAM_SPRPAL + 3 * 512 + 2 * i, b ^ 0x7fff);
- }
- // Draw the 64 squares of the board
- for (i = 0; i < 8; i++)
- for (j = 0; j < 8; j++)
- square(1 + (i << 2), 3 + (j << 2), (i ^ j) & 1);
- // Draw the rank and file markers 1-8 a-h
- for (i = 0; i < 8; i++) {
- GD.wr(atxy(3 + (i << 2), 2), 'a' + i);
- GD.wr(atxy(3 + (i << 2), 35), 'a' + i);
- GD.wr(atxy(0, 5 + (i << 2)), '8' - i);
- GD.wr(atxy(33, 5 + (i << 2)), '8' - i);
- }
- startboard();
- drawboard();
- }
- static int clock[2];
- // draw digit d in sprite slots spr,spr+1 at (x,y)
- static void digit(byte spr, byte d, byte bw, int x, int y)
- {
- GD.sprite(spr, x, y, digits + d, 2 + bw, 0);
- GD.sprite(spr + 1, x, y + 16, digits + d + 11, 2 + bw, 0);
- }
- static void showclock(byte bw)
- {
- int t = clock[bw];
- byte spr = 128 + (bw * 16);
- byte s = t % 60;
- int y = (bw ? 31 : 3) * 8;
- byte d0 = s % 10; s /= 10;
- digit(spr, d0, bw, 400 - 1 * 16, y);
- digit(spr + 2, s, bw, 400 - 2 * 16, y);
- digit(spr + 4, 10, bw, 400 - 3 * 16, y); // colon
- spr += 6;
- int x = 400 - 4 * 16;
- byte m = t / 60;
- do {
- d0 = m % 10; m /= 10;
- digit(spr, d0, bw, x, y);
- spr += 2;
- x -= 16;
- } while (m);
- }
- static int turn;
- #define ALG(r,f) ((r - 'a') + ((8 - f) * 8))
- #define CASTLE 255,255
- static byte game[] = {
- ALG('e', 2),ALG('e', 4), ALG('e', 7),ALG('e', 5),
- ALG('g', 1),ALG('f', 3), ALG('b', 8),ALG('c', 6),
- ALG('f', 1),ALG('b', 5), ALG('a', 7),ALG('a', 6),
- ALG('b', 5),ALG('a', 4), ALG('g', 8),ALG('f', 6),
- ALG('d', 1),ALG('e', 2), ALG('b', 7),ALG('b', 5),
- ALG('a', 4),ALG('b', 3), ALG('f', 8),ALG('e', 7),
- ALG('c', 2),ALG('c', 3), CASTLE,
- CASTLE, ALG('d', 7),ALG('d', 5),
- ALG('e', 4),ALG('d', 5), ALG('f', 6),ALG('d', 5),
- ALG('f', 3),ALG('e', 5), ALG('d', 5),ALG('f', 4),
- ALG('e', 2),ALG('e', 4), ALG('c', 6),ALG('e', 5),
- ALG('e', 4),ALG('a', 8), ALG('d', 8),ALG('d', 3),
- ALG('b', 3),ALG('d', 1), ALG('c', 8),ALG('h', 3),
- ALG('a', 8),ALG('a', 6), ALG('h', 3),ALG('g', 2),
- ALG('f', 1),ALG('e', 1), ALG('d', 3),ALG('f', 3),
- };
- static void putalg(byte x, byte y, byte a)
- {
- GD.wr(atxy(x, y), 'a' + (a & 7));
- GD.wr(atxy(x+1, y), '8' - ((a >> 3) & 7));
- }
- void loop()
- {
- byte i;
- for (i = random(25); i; i--) {
- clock[(1 & turn) ^ 1]++;
- GD.waitvblank();
- showclock(0);
- showclock(1);
- delay(20);
- // GD.screenshot(screenshot_i++); // JCB
- }
- if (turn < (sizeof(game) / 2)) {
- byte yy = 8 + (turn >> 1);
- byte xx = (turn & 1) ? 44 : 38;
- byte i = 1 + (turn >> 1);
- if (i >= 10)
- GD.wr(atxy(35, yy), '0' + i / 10);
- GD.wr(atxy(36, yy), '0' + i % 10);
- GD.wr(atxy(37, yy), '.');
- byte from = game[2 * turn];
- byte to = game[2 * turn + 1];
- if (from != 255) {
- putalg(xx, yy, from);
- GD.wr(atxy(xx + 2, yy), movepiece(find(from), to) ? 'x' : '-');
- putalg(xx + 3, yy, to);
- } else {
- byte rank = (turn & 1) ? 8 : 1;
- movepiece(find(ALG('e', rank)), ALG('g', rank));
- movepiece(find(ALG('h', rank)), ALG('f', rank));
- GD.putstr(xx, yy, "O-O");
- }
- turn++;
- } else {
- delay(4000);
- setup();
- turn = 0;
- clock[0] = 0;
- clock[1] = 0;
- }
- }
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