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#include <games/tetris/Tetromino.hpp>
#include <random>
#include <stdlib.h>
// layout of a left_aligned_bitmap: xxxx000000000000
// layout of a board_bitmap is 111xxxxxxxxxx111
static const uint16_t s_left_aligned_bitmaps[7][4][4] = {
{
// O piece
{0x6000, 0x6000, 0x0000, 0x0000}, // orientation 0
{0x6000, 0x6000, 0x0000, 0x0000}, // orientation 1
{0x6000, 0x6000, 0x0000, 0x0000}, // orientation 2
{0x6000, 0x6000, 0x0000, 0x0000}, // orientation 3
},
{
// S piece
{0x6000, 0x3000, 0x0000, 0x0000}, // orientation 0
{0x1000, 0x3000, 0x2000, 0x0000}, // orientation 1
{0x6000, 0x3000, 0x0000, 0x0000}, // orientation 2
{0x1000, 0x3000, 0x2000, 0x0000}, // orientation 3
},
{
// Z piece
{0x3000, 0x6000, 0x0000, 0x0000}, // orientation 0
{0x2000, 0x3000, 0x1000, 0x0000}, // orientation 1
{0x3000, 0x6000, 0x0000, 0x0000}, // orientation 2
{0x2000, 0x3000, 0x1000, 0x0000}, // orientation 3
},
{
// T piece
{0x2000, 0x7000, 0x0000, 0x0000}, // orientation 0
{0x2000, 0x6000, 0x2000, 0x0000}, // orientation 1
{0x0000, 0x7000, 0x2000, 0x0000}, // orientation 2
{0x2000, 0x3000, 0x2000, 0x0000}, // orientation 3
},
{
// L piece
{0x4000, 0x7000, 0x0000, 0x0000}, // orientation 0
{0x2000, 0x2000, 0x6000, 0x0000}, // orientation 1
{0x0000, 0x7000, 0x1000, 0x0000}, // orientation 2
{0x3000, 0x2000, 0x2000, 0x0000}, // orientation 3
},
{
// J piece
{0x1000, 0x7000, 0x0000, 0x0000}, // orientation 0
{0x6000, 0x2000, 0x2000, 0x0000}, // orientation 1
{0x0000, 0x7000, 0x4000, 0x0000}, // orientation 2
{0x2000, 0x2000, 0x3000, 0x0000}, // orientation 3
},
{
// I piece
{0x0000, 0xf000, 0x0000, 0x0000}, // orientation 0
{0x2000, 0x2000, 0x2000, 0x2000}, // orientation 1
{0x0000, 0xf000, 0x0000, 0x0000}, // orientation 2
{0x2000, 0x2000, 0x2000, 0x2000}, // orientation 3
}
};
TetrominoId Tetromino::GetRandomId() {
static std::uniform_int_distribution<int> s_Dist(0, (int)TetrominoId::TETROMINO_ID_COUNT-1);
static std::mt19937 s_Rng((std::random_device()()));
TetrominoId id = static_cast<TetrominoId>(s_Dist(s_Rng));
return id;
}
Tetromino::Tetromino(uint16_t *board_bitmap) :
m_Id(GetRandomId()),
m_Pos{6, 20},
m_Ori{0},
m_BoardBitmap(board_bitmap)
{
}
Tetromino::Tetromino(Board &board) :
Tetromino(board.m_Bitmap)
{
}
TetrominoId Tetromino::GetId() {
return m_Id;
}
BoardPos Tetromino::GetPos() {
return m_Pos;
}
void Tetromino::GetBitmap(uint16_t *bitmap) {
GetBitmap(m_Id, m_Pos, m_Ori, bitmap);
}
bool Tetromino::IsCollisionWithBoard() {
bool is_collision = IsCollisionWithBoard(m_Id, m_Pos, m_Ori, m_BoardBitmap);
return is_collision;
}
void Tetromino::MaybeRotate(TetrominoRotation rotation) {
int32_t rot = static_cast<int32_t>(rotation);
int32_t ori = (m_Ori + rot) % 4;
if (!IsCollisionWithBoard(m_Id, m_Pos, ori, m_BoardBitmap)) {
m_Ori = ori;
}
}
void Tetromino::MaybeMoveHorizontally(TetrominoDirection direction) {
BoardPos pos = m_Pos;
pos.x += static_cast<int32_t>(direction);
if (!IsCollisionWithBoard(m_Id, pos, m_Ori, m_BoardBitmap)) {
m_Pos.x = pos.x;
}
}
bool Tetromino::MaybeMoveDown() {
BoardPos pos = m_Pos;
pos.y -= 1;
if (!IsCollisionWithBoard(m_Id, pos, m_Ori, m_BoardBitmap)) {
m_Pos.y = pos.y;
return true;
}
return false;
}
void Tetromino::Draw(RenderGroup &render_group) const {
float world_width = 4.0f;
float world_height = 3.0f;
float tetromino_size_with_border = world_height / 20.0f;
float x0 = static_cast<float>(m_Pos.x - 3);
float y0 = static_cast<float>(m_Pos.y - 2);
V2F32 world_pos = {
((world_width - tetromino_size_with_border*10) / 2.0f) + x0 * tetromino_size_with_border,
y0 * tetromino_size_with_border
};
Tetromino::Draw(m_Id, m_Ori, world_pos, 1.0f, render_group);
}
bool Tetromino::IsCollisionWithBoard(TetrominoId id, BoardPos pos, int32_t ori, uint16_t *board_bitmap) {
uint16_t tetromino_bitmap[16];
GetBitmap(id, pos, ori, tetromino_bitmap);
uint64_t tetromino_bits = *(uint64_t*)(tetromino_bitmap);
uint64_t board_bits = *(uint64_t*)(&board_bitmap[pos.y]);
bool is_collision = tetromino_bits & board_bits;
return is_collision;
}
void Tetromino::GetBitmap(TetrominoId id, BoardPos pos, int32_t ori, uint16_t *bitmap) {
size_t id_ = static_cast<size_t>(id);
uint64_t *src = (uint64_t*)s_left_aligned_bitmaps[id_][ori];
uint64_t *dest = (uint64_t*)bitmap;
*dest = *src >> pos.x;
}
V3F32 Tetromino::GetColor(TetrominoId id) {
using enum TetrominoId;
V3F32 color;
switch (id) {
case TETROMINO_I:
case TETROMINO_O:
case TETROMINO_T: {
color = V3F32(0.8f, 0.8f, 0.8f);
} break;
case TETROMINO_J:
case TETROMINO_S: {
color = V3F32(0.8f, 0.2f, 0.2f);
} break;
default: {
color = V3F32(0.2f, 0.4f, 0.2f);
}
}
return color;
}
void Tetromino::Draw(TetrominoId id, int32_t ori, V2F32 pos, float scale, RenderGroup &render_group) {
int32_t id_ = static_cast<int32_t>(id);
float world_height = 3.0f;
float tetromino_size_with_border = scale * world_height / 20.0f;
float tetromino_size = 0.8f * tetromino_size_with_border;
float tetromino_offset = 0.1f * tetromino_size_with_border;
uint16_t *left_aligned_bitmap = (uint16_t*)s_left_aligned_bitmaps[id_][ori];
for (int y = 0; y < 4; y++) {
for (int x = 0; x < 4; x++) {
if (left_aligned_bitmap[y] & (0x8000 >> x)) {
V2F32 local_pos = {
(float)x * tetromino_size_with_border + tetromino_offset,
(float)y * tetromino_size_with_border + tetromino_offset
};
V2F32 local_dim = {tetromino_size, tetromino_size};
V3F32 world_pos = {
pos.x + local_pos.x,
pos.y + local_pos.y,
1.0f
};
V2F32 world_dim = local_dim;
V3F32 color = GetColor(id);
render_group.PushRectangle(world_pos, world_dim, color);
}
}
}
}
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