Snake Game

This commit is contained in:
Sterling Archer
2026-07-16 22:31:04 -07:00
parent 4a7867f22e
commit 03b7244fed
3 changed files with 353 additions and 0 deletions
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#include "SnakeActivity.h"
#include <GfxRenderer.h>
#include "MappedInputManager.h"
#include "fontIds.h"
void SnakeActivity::onEnter() {
Activity::onEnter();
screenW_ = renderer.getScreenWidth();
screenH_ = renderer.getScreenHeight();
randomSeed(millis());
resetGame();
renderPending_ = true;
requestUpdate();
}
void SnakeActivity::onExit() {
Activity::onExit();
}
void SnakeActivity::resetGame() {
cols_ = screenW_ / BLOCK;
rows_ = (screenH_ - HEADER_H - FOOTER_H) / BLOCK;
if (cols_ < 5) cols_ = 5;
if (rows_ < 5) rows_ = 5;
if ((long)cols_ * (long)rows_ > MAX_SNAKE_LEN) {
rows_ = MAX_SNAKE_LEN / cols_;
}
fieldLeft_ = (screenW_ - cols_ * BLOCK) / 2;
if (fieldLeft_ < 0) fieldLeft_ = 0;
int freeVertical = screenH_ - HEADER_H - FOOTER_H - rows_ * BLOCK;
fieldTop_ = HEADER_H + (freeVertical > 0 ? freeVertical / 2 : 0);
int cx = cols_ / 2;
int cy = rows_ / 2;
headIdx_ = 0;
length_ = 3;
snakeX_[0] = cx; snakeY_[0] = cy;
snakeX_[1] = cx - 1; snakeY_[1] = cy;
snakeX_[2] = cx - 2; snakeY_[2] = cy;
dir_ = Dir::Right;
pendingDir_ = Dir::Right;
score_ = 0;
tickInterval_ = TICK_START_MS;
gameOver_ = false;
won_ = false;
lastMove_ = millis();
placeFood();
}
bool SnakeActivity::isSnakeCell(int x, int y) const {
for (int i = 0; i < length_; i++) {
int idx = (headIdx_ + i) % MAX_SNAKE_LEN;
if (snakeX_[idx] == x && snakeY_[idx] == y) return true;
}
return false;
}
void SnakeActivity::placeFood() {
if (length_ >= cols_ * rows_) return;
int fx, fy;
do {
fx = random(0, cols_);
fy = random(0, rows_);
} while (isSnakeCell(fx, fy));
foodX_ = fx;
foodY_ = fy;
}
void SnakeActivity::handleDirectionInput() {
const int btn = mappedInput.getPressedFrontButton();
switch (btn) {
case HalGPIO::BTN_BACK:
if (dir_ != Dir::Right) pendingDir_ = Dir::Left;
break;
case HalGPIO::BTN_CONFIRM:
if (dir_ != Dir::Left) pendingDir_ = Dir::Right;
break;
case HalGPIO::BTN_LEFT:
if (dir_ != Dir::Down) pendingDir_ = Dir::Up;
break;
case HalGPIO::BTN_RIGHT:
if (dir_ != Dir::Up) pendingDir_ = Dir::Down;
break;
default:
break;
}
}
void SnakeActivity::updateGame() {
dir_ = pendingDir_;
int dx = 0, dy = 0;
switch (dir_) {
case Dir::Up: dy = -1; break;
case Dir::Down: dy = 1; break;
case Dir::Left: dx = -1; break;
case Dir::Right: dx = 1; break;
}
int newX = snakeX_[headIdx_] + dx;
int newY = snakeY_[headIdx_] + dy;
if (newX < 0 || newX >= cols_ || newY < 0 || newY >= rows_) {
gameOver_ = true;
return;
}
bool willEat = (newX == foodX_ && newY == foodY_);
for (int i = 0; i < length_; i++) {
if (!willEat && i == length_ - 1) continue;
int idx = (headIdx_ + i) % MAX_SNAKE_LEN;
if (snakeX_[idx] == newX && snakeY_[idx] == newY) {
gameOver_ = true;
return;
}
}
headIdx_ = (headIdx_ - 1 + MAX_SNAKE_LEN) % MAX_SNAKE_LEN;
snakeX_[headIdx_] = newX;
snakeY_[headIdx_] = newY;
if (willEat) {
if (length_ < MAX_SNAKE_LEN) length_++;
score_ += POINTS_PER_FOOD;
if (length_ >= cols_ * rows_) {
gameOver_ = true;
won_ = true;
return;
}
if (score_ % SPEEDUP_EVERY_POINTS == 0 && tickInterval_ > TICK_MIN_MS) {
tickInterval_ -= TICK_STEP_MS;
if (tickInterval_ < TICK_MIN_MS) tickInterval_ = TICK_MIN_MS;
}
placeFood();
}
}
void SnakeActivity::loop() {
if (mappedInput.wasPressed(MappedInputManager::Button::Power)) {
while (mappedInput.isPressed(MappedInputManager::Button::Power)) {
mappedInput.update();
delay(10);
}
finish();
return;
}
if (gameOver_) {
if (mappedInput.getPressedFrontButton() != -1) {
resetGame();
renderPending_ = true;
requestUpdate();
}
return;
}
handleDirectionInput();
unsigned long now = millis();
if (now - lastMove_ >= tickInterval_) {
lastMove_ = now;
updateGame();
renderPending_ = true;
}
if (renderPending_) {
requestUpdate();
}
}
void SnakeActivity::drawFooterLabels() const {
static const char* labels[4] = {"Left", "Right", "Up", "Down"};
int footerTop = screenH_ - FOOTER_H;
renderer.drawLine(0, footerTop, screenW_, footerTop);
int colW = screenW_ / 4;
int textH = renderer.getTextHeight(SMALL_FONT_ID);
int labelY = footerTop + (FOOTER_H - textH) / 2;
for (int i = 0; i < 4; i++) {
int w = renderer.getTextWidth(SMALL_FONT_ID, labels[i]);
int colCenterX = i * colW + colW / 2;
renderer.drawText(SMALL_FONT_ID, colCenterX - w / 2, labelY, labels[i], true);
if (i > 0) {
renderer.drawLine(i * colW, footerTop, i * colW, screenH_);
}
}
}
void SnakeActivity::render(RenderLock&&) {
renderPending_ = false;
renderer.clearScreen();
char scoreStr[24];
snprintf(scoreStr, sizeof(scoreStr), "Score: %d", score_);
renderer.drawText(UI_10_FONT_ID, 12, 10, scoreStr, true);
int fieldW = cols_ * BLOCK;
int fieldH = rows_ * BLOCK;
renderer.drawLine(fieldLeft_, fieldTop_, fieldLeft_ + fieldW, fieldTop_);
renderer.drawLine(fieldLeft_, fieldTop_ + fieldH, fieldLeft_ + fieldW, fieldTop_ + fieldH);
renderer.drawLine(fieldLeft_, fieldTop_, fieldLeft_, fieldTop_ + fieldH);
renderer.drawLine(fieldLeft_ + fieldW, fieldTop_, fieldLeft_ + fieldW, fieldTop_ + fieldH);
for (int i = 0; i < length_; i++) {
int idx = (headIdx_ + i) % MAX_SNAKE_LEN;
int x = fieldLeft_ + snakeX_[idx] * BLOCK;
int y = fieldTop_ + snakeY_[idx] * BLOCK;
renderer.fillRect(x + 1, y + 1, BLOCK - 2, BLOCK - 2, true);
if (i == 0) {
int innerSize = BLOCK / 3;
renderer.fillRect(x + (BLOCK - innerSize) / 2, y + (BLOCK - innerSize) / 2,
innerSize, innerSize, false);
}
}
int fx = fieldLeft_ + foodX_ * BLOCK;
int fy = fieldTop_ + foodY_ * BLOCK;
renderer.fillRect(fx + 1, fy + 1, BLOCK - 2, BLOCK - 2, true);
renderer.fillRect(fx + 4, fy + 4, BLOCK - 8, BLOCK - 8, false);
drawFooterLabels();
if (gameOver_) {
char line2[24];
snprintf(line2, sizeof(line2), "Score: %d", score_);
int baseY = fieldTop_ + fieldH / 2 - 40;
renderer.drawCenteredText(UI_12_FONT_ID, baseY, won_ ? "YOU WIN!" : "GAME OVER",
true, EpdFontFamily::BOLD);
renderer.drawCenteredText(UI_10_FONT_ID, baseY + 30, line2);
renderer.drawCenteredText(UI_10_FONT_ID, baseY + 56, "Any button to Restart");
renderer.drawCenteredText(UI_10_FONT_ID, baseY + 78, "Power button to Exit");
}
renderer.displayBuffer();
}
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#pragma once
#include "activities/Activity.h"
class SnakeActivity final : public Activity {
public:
explicit SnakeActivity(GfxRenderer& renderer, MappedInputManager& mappedInput)
: Activity("Snake", renderer, mappedInput) {}
void onEnter() override;
void onExit() override;
void loop() override;
bool skipLoopDelay() override { return true; }
void render(RenderLock&&) override;
private:
enum class Dir { Up, Down, Left, Right };
static constexpr int BLOCK = 18;
static constexpr int HEADER_H = 34;
static constexpr int FOOTER_H = 30;
static constexpr int MAX_SNAKE_LEN = 2048;
static constexpr unsigned long TICK_START_MS = 170;
static constexpr unsigned long TICK_MIN_MS = 80;
static constexpr unsigned long TICK_STEP_MS = 6;
static constexpr int POINTS_PER_FOOD = 10;
static constexpr int SPEEDUP_EVERY_POINTS = 50;
int screenW_ = 0;
int screenH_ = 0;
int cols_ = 0;
int rows_ = 0;
int fieldLeft_ = 0;
int fieldTop_ = 0;
int snakeX_[MAX_SNAKE_LEN];
int snakeY_[MAX_SNAKE_LEN];
int headIdx_ = 0;
int length_ = 0;
Dir dir_ = Dir::Right;
Dir pendingDir_ = Dir::Right;
int foodX_ = 0;
int foodY_ = 0;
int score_ = 0;
unsigned long tickInterval_ = TICK_START_MS;
bool gameOver_ = false;
bool won_ = false;
bool renderPending_ = false;
unsigned long lastMove_ = 0;
void resetGame();
void placeFood();
bool isSnakeCell(int x, int y) const;
void handleDirectionInput();
void updateGame();
void drawFooterLabels() const;
};
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import sys
import os
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__)))))
from framework.manifest import (
PluginManifest, SourceFile, Include, SettingActionEnumValue, PluginsTabEntry,
)
def get_manifest(ctx):
return PluginManifest(
name="snakegame",
pretty_name="Snake Game",
source_files=[
SourceFile("SnakeActivity.h", "src/activities"),
SourceFile("SnakeActivity.cpp", "src/activities"),
],
includes=[
Include("activities/SnakeActivity.h", "settings_activity_cpp"),
],
setting_actions=[
SettingActionEnumValue("SnakeGame"),
],
plugins_tab_entries=[
PluginsTabEntry(
label="Snake Game",
kind="action",
action_name="SnakeGame",
action_value_text="Launch",
activity_launch_expr="std::make_unique<SnakeActivity>(renderer, mappedInput)",
),
],
)