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add rotation & make code a bit more readable

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Quinn
2025-01-29 15:37:49 +01:00
parent 0856301c41
commit 36ccb653ef
3 changed files with 45 additions and 28 deletions
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9
src/game/game.c
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@@ -77,6 +77,13 @@ void game_update(GameData* game_data, const uint8_t* keys) {
if (keys[SDL_SCANCODE_ESCAPE])
stop();
place_update(game_data, keys);
InputData move = MOVE_NONE;
if (keys[SDL_SCANCODE_LEFT] || keys[SDL_SCANCODE_A]) move |= MOVE_LEFT;
if (keys[SDL_SCANCODE_RIGHT] || keys[SDL_SCANCODE_D]) move |= MOVE_RIGHT;
if (keys[SDL_SCANCODE_DOWN] || keys[SDL_SCANCODE_S] || keys[SDL_SCANCODE_SPACE]) move |= MOVE_DOWN;
if (keys[SDL_SCANCODE_Q]) move |= MOVE_ROTLEFT;
if (keys[SDL_SCANCODE_E]) move |= MOVE_ROTRIGHT;
place_update(game_data, move);
// dbg_set_all(game_data);
}

52
src/game/tetromino/placing.c
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@@ -48,39 +48,39 @@ static bool shape_intersects(const Row* rows, const ShapeId id, const uint8_t x,
return false;
}
void place_update(GameData* const game_data, const uint8_t* const keys) {
int8_t move = 0;
static inline ShapeId rotate_id(const ShapeId id, const int dir) {
return (id + dir) & 31;
}
if (keys[SDL_SCANCODE_LEFT] || keys[SDL_SCANCODE_A])
move |= 1;
if (keys[SDL_SCANCODE_RIGHT] || keys[SDL_SCANCODE_D])
move |= 2;
if (keys[SDL_SCANCODE_DOWN] || keys[SDL_SCANCODE_S] || keys[SDL_SCANCODE_SPACE])
move |= 4;
// set the shape if we moved vertically and collided
if (!!(move & 4)) {
const uint8_t y = game_data->selected.y + 1;
if (shape_intersects(game_data->row, game_data->selected.id, game_data->selected.x, y)) {
set_shape(game_data->row, game_data->selected.id, game_data->selected.x, y);
void place_update(GameData* const game_data, const InputData move) {
SelectedShape* const selected = &game_data->selected;
// set the shape if we moved vertically and intersected
if (move & 4) {
const uint8_t y = selected->y + 1;
if (shape_intersects(game_data->row, selected->id, selected->x, y)) {
set_shape(game_data->row, selected->id, selected->x, selected->y); // if the shape intersects vertically, write the shape at the current position and return
return;
}
game_data->selected.y = y;
// otherwise, just set Y
selected->y = y;
}
// ignore if the movement cancles itself out
if ((move & 3) == 0 || (move & 3) == 3)
return;
// update shape's X coordinate movement
if ((move & 3) != 3 && (move & 3)) {
const uint8_t x = selected->x + ((move & 3) == 1 ? -1 : 1); // either move along -x or +x
if (shape_intersects(game_data->row, selected->id, x, selected->y) == false) {
selected->x = x; // set X if the shape does not intersect
}
}
const uint8_t x = game_data->selected.x + ((move & 3) == 1 ? -1 : 1);
if (shape_intersects(game_data->row, game_data->selected.id, x, game_data->selected.y))
return;
game_data->selected.x = x;
printf("%i\n", x);
// update the shape's rotation
if (move & 8 || move & 16) {
const ShapeId id = move & 8 ? rotate_id(selected->id, -8) : rotate_id(selected->id, 8);
if (shape_intersects(game_data->row, id, selected->x, selected->y) == false) {
selected->id = id;
}
}
}
#ifdef DEBUG

12
src/game/tetromino/placing.h
View File

@@ -6,7 +6,17 @@
#include "../game.h"
#include "shapes.h"
void place_update(GameData* game_data, const uint8_t* keys);
typedef uint8_t InputData;
enum {
MOVE_NONE = 0,
MOVE_LEFT = 1,
MOVE_RIGHT = 2,
MOVE_DOWN = 4,
MOVE_ROTLEFT = 8,
MOVE_ROTRIGHT = 16,
};
void place_update(GameData* game_data, const InputData move);
#ifdef DEBUG
void dbg_set_all(GameData* game_data);