/**
* Endless Runner
* Date: August 18, 2017
* Author: Joshua Brooks (http://www.instructables.com/member/joshua.brooks/)
* Modified by: Shawn Hymel (SparkFun Electronics)
*
* Adjust LCD contrast with the potentiometer. Press the button
* to start the game. During gameplay, press the button to jump
* and avoid obstacles. Running into an object will result in
* restarting. Points are awarded based on distance.
*/
#include <LiquidCrystal.h>
// Constants
#define BTN_PIN 7
#define SPRITE_RUN1 1
#define SPRITE_RUN2 2
#define SPRITE_JUMP 3
#define SPRITE_JUMP_UPPER '.' // Use the '.' character for the head
#define SPRITE_JUMP_LOWER 4
#define SPRITE_TERRAIN_EMPTY ' ' // User the ' ' character
#define SPRITE_TERRAIN_SOLID 5
#define SPRITE_TERRAIN_SOLID_RIGHT 6
#define SPRITE_TERRAIN_SOLID_LEFT 7
#define HERO_HORIZONTAL_POSITION 1 // Horizontal position of hero on screen
#define TERRAIN_WIDTH 16
#define TERRAIN_EMPTY 0
#define TERRAIN_LOWER_BLOCK 1
#define TERRAIN_UPPER_BLOCK 2
#define HERO_POSITION_OFF 0 // Hero is invisible
#define HERO_POSITION_RUN_LOWER_1 1 // Hero is running on lower row (pose 1)
#define HERO_POSITION_RUN_LOWER_2 2 // (pose 2)
#define HERO_POSITION_JUMP_1 3 // Starting a jump
#define HERO_POSITION_JUMP_2 4 // Half-way up
#define HERO_POSITION_JUMP_3 5 // Jump is on upper row
#define HERO_POSITION_JUMP_4 6 // Jump is on upper row
#define HERO_POSITION_JUMP_5 7 // Jump is on upper row
#define HERO_POSITION_JUMP_6 8 // Jump is on upper row
#define HERO_POSITION_JUMP_7 9 // Half-way down
#define HERO_POSITION_JUMP_8 10 // About to land
#define HERO_POSITION_RUN_UPPER_1 11 // Hero is running on upper row (pose 1)
#define HERO_POSITION_RUN_UPPER_2 12
// Globals
LiquidCrystal lcd(8, 9, 10, 11, 12, 13);
static char terrainUpper[TERRAIN_WIDTH + 1];
static char terrainLower[TERRAIN_WIDTH + 1];
static bool buttonPushed = false;
void setup() {
initializeGraphics();
lcd.begin(16, 2);
pinMode(BTN_PIN, INPUT_PULLUP);
pinMode(6, OUTPUT);
pinMode(5, OUTPUT);
pinMode(4, OUTPUT);
pinMode(3, OUTPUT);
pinMode(2, OUTPUT);
digitalWrite(6, HIGH);
digitalWrite(5, LOW);
digitalWrite(4, LOW);
digitalWrite(3, LOW);
digitalWrite(2, HIGH);
}
void loop() {
static byte heroPos = HERO_POSITION_RUN_LOWER_1;
static byte newTerrainType = TERRAIN_EMPTY;
static byte newTerrainDuration = 1;
static bool playing = false;
static bool blink = false;
static unsigned int distance = 0;
// Check if button is pressed
if ( digitalRead(BTN_PIN) == LOW ) {
buttonPushed = true;
}
// Show start screen if not currently playing game
if (!playing) {
drawHero((blink) ? HERO_POSITION_OFF : heroPos, terrainUpper, terrainLower, distance >> 3);
if (blink) {
lcd.setCursor(0, 0);
lcd.print("tusa bas basla");
}
delay(250);
blink = !blink;
if (buttonPushed) {
initializeGraphics();
heroPos = HERO_POSITION_RUN_LOWER_1;
playing = true;
buttonPushed = false;
distance = 0;
}
return;
}
// Shift the terrain to the left
advanceTerrain(terrainLower, newTerrainType == TERRAIN_LOWER_BLOCK ? SPRITE_TERRAIN_SOLID : SPRITE_TERRAIN_EMPTY);
advanceTerrain(terrainUpper, newTerrainType == TERRAIN_UPPER_BLOCK ? SPRITE_TERRAIN_SOLID : SPRITE_TERRAIN_EMPTY);
// Make new terrain to enter on the right
if (--newTerrainDuration == 0) {
if (newTerrainType == TERRAIN_EMPTY) {
newTerrainType = (random(3) == 0) ? TERRAIN_UPPER_BLOCK : TERRAIN_LOWER_BLOCK;
newTerrainDuration = 2 + random(10);
} else {
newTerrainType = TERRAIN_EMPTY;
newTerrainDuration = 10 + random(10);
}
}
// Jump if button is pressed
if (buttonPushed) {
if (heroPos <= HERO_POSITION_RUN_LOWER_2) heroPos = HERO_POSITION_JUMP_1;
buttonPushed = false;
}
// Draw hero on screen and check for collisions
if (drawHero(heroPos, terrainUpper, terrainLower, distance >> 3)) {
playing = false; // The hero collided with something. Too bad.
} else {
if (heroPos == HERO_POSITION_RUN_LOWER_2 || heroPos == HERO_POSITION_JUMP_8) {
heroPos = HERO_POSITION_RUN_LOWER_1;
} else if ((heroPos >= HERO_POSITION_JUMP_3 && heroPos <= HERO_POSITION_JUMP_5) && terrainLower[HERO_HORIZONTAL_POSITION] != SPRITE_TERRAIN_EMPTY) {
heroPos = HERO_POSITION_RUN_UPPER_1;
} else if (heroPos >= HERO_POSITION_RUN_UPPER_1 && terrainLower[HERO_HORIZONTAL_POSITION] == SPRITE_TERRAIN_EMPTY) {
heroPos = HERO_POSITION_JUMP_5;
} else if (heroPos == HERO_POSITION_RUN_UPPER_2) {
heroPos = HERO_POSITION_RUN_UPPER_1;
} else {
++heroPos;
}
++distance;
}
delay(100);
}
// Create custom character LCD graphics
void initializeGraphics() {
static byte graphics[] = {
// Run position 1
B01100,
B01100,
B00000,
B01110,
B11100,
B01100,
B11010,
B10011,
// Run position 2
B01100,
B01100,
B00000,
B01100,
B01100,
B01100,
B01100,
B01110,
// Jump
B01100,
B01100,
B00000,
B11110,
B01101,
B11111,
B10000,
B00000,
// Jump lower
B11110,
B01101,
B11111,
B10000,
B00000,
B00000,
B00000,
B00000,
// Ground
B11111,
B11111,
B11111,
B11111,
B11111,
B11111,
B11111,
B11111,
// Ground right
B00011,
B00011,
B00011,
B00011,
B00011,
B00011,
B00011,
B00011,
// Ground left
B11000,
B11000,
B11000,
B11000,
B11000,
B11000,
B11000,
B11000,
};
int i;
// Skip using character 0, this allows lcd.print() to be used
// to quickly draw multiple characters
for (i = 0; i < 7; ++i) {
lcd.createChar(i + 1, &graphics[i * 8]);
}
// Fill screen with empty terrain
for (i = 0; i < TERRAIN_WIDTH; ++i) {
terrainUpper[i] = SPRITE_TERRAIN_EMPTY;
terrainLower[i] = SPRITE_TERRAIN_EMPTY;
}
}
// Slide the terrain to the left in half-character increments
void advanceTerrain(char* terrain, byte newTerrain) {
for (int i = 0; i < TERRAIN_WIDTH; ++i) {
char current = terrain[i];
char next = (i == TERRAIN_WIDTH - 1) ? newTerrain : terrain[i + 1];
switch (current) {
case SPRITE_TERRAIN_EMPTY:
terrain[i] = (next == SPRITE_TERRAIN_SOLID) ? SPRITE_TERRAIN_SOLID_RIGHT : SPRITE_TERRAIN_EMPTY;
break;
case SPRITE_TERRAIN_SOLID:
terrain[i] = (next == SPRITE_TERRAIN_EMPTY) ? SPRITE_TERRAIN_SOLID_LEFT : SPRITE_TERRAIN_SOLID;
break;
case SPRITE_TERRAIN_SOLID_RIGHT:
terrain[i] = SPRITE_TERRAIN_SOLID;
break;
case SPRITE_TERRAIN_SOLID_LEFT:
terrain[i] = SPRITE_TERRAIN_EMPTY;
break;
}
}
}
// Draw hero on screen and check for collisions
bool drawHero(byte position, char* terrainUpper, char* terrainLower, unsigned int score) {
bool collide = false;
char upperSave = terrainUpper[HERO_HORIZONTAL_POSITION];
char lowerSave = terrainLower[HERO_HORIZONTAL_POSITION];
byte upper, lower;
// Draw the appropriate sprite for the hero (run or jump)
switch (position) {
case HERO_POSITION_OFF:
upper = lower = SPRITE_TERRAIN_EMPTY;
break;
case HERO_POSITION_RUN_LOWER_1:
upper = SPRITE_TERRAIN_EMPTY;
lower = SPRITE_RUN1;
break;
case HERO_POSITION_RUN_LOWER_2:
upper = SPRITE_TERRAIN_EMPTY;
lower = SPRITE_RUN2;
break;
case HERO_POSITION_JUMP_1:
case HERO_POSITION_JUMP_8:
upper = SPRITE_TERRAIN_EMPTY;
lower = SPRITE_JUMP;
break;
case HERO_POSITION_JUMP_2:
case HERO_POSITION_JUMP_7:
upper = SPRITE_JUMP_UPPER;
lower = SPRITE_JUMP_LOWER;
break;
case HERO_POSITION_JUMP_3:
case HERO_POSITION_JUMP_4:
case HERO_POSITION_JUMP_5:
case HERO_POSITION_JUMP_6:
upper = SPRITE_JUMP;
lower = SPRITE_TERRAIN_EMPTY;
break;
case HERO_POSITION_RUN_UPPER_1:
upper = SPRITE_RUN1;
lower = SPRITE_TERRAIN_EMPTY;
break;
case HERO_POSITION_RUN_UPPER_2:
upper = SPRITE_RUN2;
lower = SPRITE_TERRAIN_EMPTY;
break;
}
// Detect collisions with terrain
if (upper != ' ') {
terrainUpper[HERO_HORIZONTAL_POSITION] = upper;
collide = (upperSave == SPRITE_TERRAIN_EMPTY) ? false : true;
}
if (lower != ' ') {
terrainLower[HERO_HORIZONTAL_POSITION] = lower;
collide |= (lowerSave == SPRITE_TERRAIN_EMPTY) ? false : true;
}
// Calculate number of digits needed to draw the score
byte digits = (score > 9999) ? 5 : (score > 999) ? 4 : (score > 99) ? 3 : (score > 9) ? 2 : 1;
// Draw the scene
terrainUpper[TERRAIN_WIDTH] = '\0';
terrainLower[TERRAIN_WIDTH] = '\0';
char temp = terrainUpper[16 - digits];
terrainUpper[16 - digits] = '\0';
lcd.setCursor(0, 0);
lcd.print(terrainUpper);
terrainUpper[16 - digits] = temp;
lcd.setCursor(0, 1);
lcd.print(terrainLower);
// Draw score in upper right of screen
lcd.setCursor(16 - digits, 0);
lcd.print(score);
terrainUpper[HERO_HORIZONTAL_POSITION] = upperSave;
terrainLower[HERO_HORIZONTAL_POSITION] = lowerSave;
return collide;
}
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