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move.c
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move.c
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#include "2048.h"
// TODO: turn these crappy multi-functions into some really cool algorithm that works for all of them
int movetilesdown() {
int row, column, moved, rmoved = 0;
do {
moved = 0;
for (column = 0; column < 4; column++) {
for (row = 3; row >= 0; row--) {
if (!BOARD_RC(row, column) && row && BOARD_RC(row - 1, column)) {
BOARD_RC(row, column) = BOARD_RC(row - 1, column);
BOARD_RC(row - 1, column) = 0;
moved++;
}
}
}
rmoved += moved;
} while (moved);
return rmoved;
}
int movetilesup() {
int row, column, moved, rmoved = 0;
do {
moved = 0;
for (column = 0; column < 4; column++) {
for (row = 0; row < 4; row++) {
if (!BOARD_RC(row, column) && row < 3 && BOARD_RC(row + 1, column)) {
BOARD_RC(row, column) = BOARD_RC(row + 1, column);
BOARD_RC(row + 1, column) = 0;
moved++;
}
}
}
rmoved += moved;
} while (moved);
return rmoved;
}
int movetilesright() {
int row, column, moved, rmoved = 0;
do {
moved = 0;
for (row = 0; row < 4; row++) {
for (column = 3; column >= 0; column--) {
if (!BOARD_RC(row, column) && column && BOARD_RC(row, column - 1)) {
BOARD_RC(row, column) = BOARD_RC(row, column - 1);
BOARD_RC(row, column - 1) = 0;
moved++;
}
}
}
rmoved += moved;
} while (moved);
return rmoved;
}
int movetilesleft() {
int row, column, moved, rmoved = 0;
do {
moved = 0;
for (row = 0; row < 4; row++) {
for (column = 0; column < 4; column++) {
if (!BOARD_RC(row, column) && column < 3 && BOARD_RC(row, column + 1)) {
BOARD_RC(row, column) = BOARD_RC(row, column + 1);
BOARD_RC(row, column + 1) = 0;
moved++;
}
}
}
rmoved += moved;
} while (moved);
return rmoved;
}
int combinetilesdown() {
int row, column, combined = 0;
for (column = 0; column < 4; column++) {
for (row = 3; row > 0; row--) {
if (BOARD_RC(row, column) && BOARD_RC(row, column) == BOARD_RC(row - 1, column)) {
BOARD_RC(row, column) += BOARD_RC(row - 1, column);
BOARD_RC(row - 1, column) = 0;
recent_score += BOARD_RC(row, column);
row--; /* make sure we don't do double-combines on the same tile */
combined++;
}
}
}
return combined;
}
int combinetilesup() {
int row, column, combined = 0;
for (column = 0; column < 4; column++) {
for (row = 0; row < 3; row++) {
if (BOARD_RC(row, column) && BOARD_RC(row, column) == BOARD_RC(row + 1, column)) {
BOARD_RC(row, column) += BOARD_RC(row + 1, column);
BOARD_RC(row + 1, column) = 0;
recent_score += BOARD_RC(row, column);
row++; /* make sure we don't do double-combines on the same tile */
combined++;
}
}
}
return combined;
}
int combinetilesright() {
int row, column, combined = 0;
for (row = 0; row < 4; row++) {
for (column = 3; column > 0; column--) {
if (BOARD_RC(row, column) && BOARD_RC(row, column) == BOARD_RC(row, column - 1)) {
BOARD_RC(row, column) += BOARD_RC(row, column - 1);
BOARD_RC(row, column - 1) = 0;
recent_score += BOARD_RC(row, column);
column--; /* make sure we don't do double-combines on the same tile */
combined++;
}
}
}
return combined;
}
int combinetilesleft() {
int row, column, combined = 0;
for (row = 0; row < 4; row++) {
for (column = 0; column < 3; column++) {
if (BOARD_RC(row, column) && BOARD_RC(row, column) == BOARD_RC(row, column + 1)) {
BOARD_RC(row, column) += BOARD_RC(row, column + 1);
BOARD_RC(row, column + 1) = 0;
recent_score += BOARD_RC(row, column);
column++; /* make sure we don't do double-combines on the same tile */
combined++;
}
}
}
return combined;
}
int moveup() {
return movetilesup() + combinetilesup() + movetilesup();
}
int movedown() {
return movetilesdown() + combinetilesdown() + movetilesdown();
}
int moveright() {
return movetilesright() + combinetilesright() + movetilesright();
}
int moveleft() {
return movetilesleft() + combinetilesleft() + movetilesleft();
}
// I needed this at one point
// KEY_DOWN v 258
// KEY_UP ^ 259
// KEY_LEFT < 260
// KEY_RIGHT > 261
#pragma ide diagnostic ignored "hicpp-multiway-paths-covered"
int keymove(int direction) {
switch (direction) {
case KEY_DOWN: return movedown();
case KEY_UP: return moveup();
case KEY_LEFT: return moveleft();
case KEY_RIGHT: return moveright();
default: return 0;
}
}