thepigeongenerator/tetris_clone
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remove the lookup table / binary-encoded logic.

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Quinn
2025-07-03 09:46:40 +02:00
parent 6a807b59d7
commit b89fc62513
2 changed files with 0 additions and 59 deletions
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49
src/game/tetromino/shapes.c
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@@ -4,39 +4,6 @@
#include "../../util/types.h"
#include "../../util/vec.h"
/* 0 1 2 3 */
#define SHAPE_O ((u16)0x0660) // 0000 0110 0110 0000 the O tetromino with no rotation
#define SHAPE_I ((u16)0x0F00) // 0000 1111 0000 0000 the I tetromino with no rotation
#define SHAPE_I_90 ((u16)0x2222) // 0010 0010 0010 0010 the I tetromino with a 90° rotation
#define SHAPE_I_180 ((u16)0x00F0) // 0000 0000 1111 0000 the I tetromino with a 180° rotation
#define SHAPE_I_270 ((u16)0x4444) // 0100 0100 0100 0100 the I tetromino with a 270° rotation
#define SHAPE_S ((u16)0x6C00) // 0110 1100 0000 0000 the S tetromino with no rotation
#define SHAPE_S_90 ((u16)0x4620) // 0100 0110 0010 0000 the S tetromino with a 90° rotation
#define SHAPE_S_180 ((u16)0x06C0) // 0000 0110 1100 0000 the S tetromino with a 180° rotation
#define SHAPE_S_270 ((u16)0x8C40) // 1000 1100 0100 0000 the S tetromino with a 270° rotation
#define SHAPE_Z ((u16)0xC600) // 1100 0110 0000 0000 the Z tetromino with no rotation
#define SHAPE_Z_90 ((u16)0x2640) // 0010 0110 0100 0000 the Z tetromino with a 90° rotation
#define SHAPE_Z_180 ((u16)0x0C60) // 0000 1100 0110 0000 the Z tetromino with a 180° rotation
#define SHAPE_Z_270 ((u16)0x4C80) // 0100 1100 1000 0000 the Z tetromino with a 270° rotation
#define SHAPE_T ((u16)0x0E40) // 0000 1110 0100 0000 the T tetromino with no rotation
#define SHAPE_T_90 ((u16)0x4C40) // 0100 1100 0100 0000 the T tetromino with a 90° rotation
#define SHAPE_T_180 ((u16)0x4E00) // 0100 1110 0000 0000 the T tetromino with a 180° rotation
#define SHAPE_T_270 ((u16)0x4640) // 0100 0110 0100 0000 the T tetromino with a 270° rotation
#define SHAPE_L ((u16)0x4460) // 0100 0100 0110 0000 the L tetromino with no rotation
#define SHAPE_L_90 ((u16)0x0E80) // 0000 1110 1000 0000 the L tetromino with a 90° rotation
#define SHAPE_L_180 ((u16)0xC440) // 1100 0100 0100 0000 the L tetromino with a 180° rotation
#define SHAPE_L_270 ((u16)0x2E00) // 0010 1110 0000 0000 the L tetromino with a 270° rotation
#define SHAPE_J ((u16)0x44C0) // 0100 0100 1100 0000 the J tetromino with no rotation
#define SHAPE_J_90 ((u16)0x8E00) // 1000 1110 0000 0000 the J tetromino with a 90° rotation
#define SHAPE_J_180 ((u16)0x6440) // 0110 0100 0100 0000 the J tetromino with a 180° rotation
#define SHAPE_J_270 ((u16)0x0E20) // 0000 1110 0010 0000 the J tetromino with a 270° rotation
void shape_getblocks(u8 id, i8vec2* restrict out) {
struct blockdat {
u8 ax : 2, ay : 2;
@@ -95,22 +62,6 @@ void shape_getblocks(u8 id, i8vec2* restrict out) {
out[3] = (i8vec2){dat.dx, dat.dy};
}
u16 shape_from_id(u8 id) {
static u16 const shapes[TETROMINO_COUNT][4] = {
// 0° 90° 180° 170°
{SHAPE_O, SHAPE_O, SHAPE_O, SHAPE_O},
{SHAPE_I, SHAPE_I_90, SHAPE_I_180, SHAPE_I_270},
{SHAPE_S, SHAPE_S_90, SHAPE_S_180, SHAPE_S_270},
{SHAPE_Z, SHAPE_Z_90, SHAPE_Z_180, SHAPE_Z_270},
{SHAPE_T, SHAPE_T_90, SHAPE_T_180, SHAPE_T_270},
{SHAPE_L, SHAPE_L_90, SHAPE_L_180, SHAPE_L_270},
{SHAPE_J, SHAPE_J_90, SHAPE_J_180, SHAPE_J_270},
};
// first 3 least significant bits is the shape type, the rest is rotation data
return shapes[id & 7][id >> 3];
}
colour8 colour_from_id(u8 id) {
switch (id & 7) {
case TETROMINO_O: return COLOUR8_YELLOW;