/* * Here you'll add a new game element, a heart, which will add a life to * the player's total if they get collide with it in a jump. * Hearts will show up randomly. * * The decision of whether a heart will show up will be based on another * 'state variable' that will be set to 0 or 1 at each game level. */ #include "MakerScreenXVI.h" MakerScreenXVI lcd; byte run0[8] = { //legs in partial stride 0b00000, 0b01100, 0b01100, 0b01100, 0b01110, 0b01100, 0b01010, 0b01010 }; byte run1[8] = { //legs in full stride 0b00000, 0b01100, 0b01100, 0b01111, 0b01100, 0b01100, 0b01010, 0b10001 }; byte wall[8] = { //wall obstacle 0b11111, 0b10101, 0b11111, 0b10001, 0b11111, 0b10101, 0b11111, 0b10001 }; byte crash[8] = { //crashed JumpMan 0b00000, 0b00011, 0b01011, 0b00111, 0b00011, 0b00011, 0b00001, 0b00001 }; byte jump[8] = { //mid-jump icon 0b00110, 0b10110, 0b01100, 0b01111, 0b01110, 0b01011, 0b10000, 0b00000 }; // Make an icon for the heart object, just like the others byte heart[8] = {//heart for extra life 0b00000, 0b01010, 0b10101, 0b10001, 0b01010, 0b00100, 0b00000, 0b00000 }; int position = 0; //holds the changing position of the cursor bool runState = 0; //which running animation to draw (0 or 1). int jumpState = 0; //0 ='pre-jump', 1 ='mid jump', 2='post jump' bool buttonState = 0; //will equal 1 after press, 0 after jump completed int wallPosition = 14; //wall can be placed from 0 to 15 int lives = 3; //starting number of lives int animationDuration = 300;//ms between animations of JumpMan's legs int runDuration = 600; //ms between moving JumpMan's position on the screen //Timers to update for each 'level' long animationTimer; long runTimer; bool heartState = 0;//0 = no heart available, 1 = heart available int heartPosition; //which column is the heart in? void setup() { lcd.begin(); lcd.backlightOn(); lcd.createChar(0, run0); //partial stride character lcd.createChar(1, run1); //full stride character lcd.createChar(2, wall); //wall character in 'slot' 2 of custom characters lcd.createChar(3, crash); //splatted character against the wall lcd.createChar(4, jump); //mid-jump icon lcd.createChar(5, heart); //heart for extra lives pinMode(6,INPUT_PULLUP); //button to trigger jump startScreen();//run function for welcome screen //Start both timers equal to millis() so that the difference between //millis and the variables is 0. animationTimer = millis(); runTimer = millis(); /* * randomSeed() is a built-in function for Arduino that takes a * reading from a pin and uses that reading to create a random number. * Without it, Maker Board will use the same pattern of 'random' * numbers. randomSeed solves that problem. */ randomSeed(analogRead(A0));//take a reading from A0 to get a random number } void loop() { lcd.setCursor(0,0); lcd.write(4); //Show the jump icon alongside the lives counter lcd.print(lives); //Set the cursor depending on the state of the character if (jumpState == 0){ lcd.setCursor(position,1); } else if (jumpState == 1){ lcd.setCursor(position,0); } else if (jumpState == 2){ lcd.setCursor(position,1); } if (jumpState == 1){ //if jump has been activated.. lcd.write(4); //draw JumpMan mid-air } else{ lcd.write(runState); //draw the run0 or run1 animation } lcd.setCursor(wallPosition,1); lcd.write(2); //draw wall // Draw the heart right after drawing the wall, but only // if heartState is 1- if there is currently one available. if (heartState == 1){ lcd.setCursor(heartPosition,0); lcd.write(5); //heart icon } if ((digitalRead(6) == LOW)&&(jumpState == 0)){ buttonState = 1; //1 means a press is recorded } //Button is unpressed and a jump has been completed if ((digitalRead(6) == HIGH)&&(jumpState == 2)){ jumpState = 0; } if (millis() - animationTimer > animationDuration){ runState = 1 - runState; //draw the next JumpMan animation animationTimer = millis(); lcd.clear(); //clear the LCD to draw a new character } if (millis() - runTimer > runDuration){//update position after runDuration position = position + 1; /* * In the 'if' block that resets the runner to the left of the * screen, use random() to decide if a heart will be available */ if (position == 16){ heartState = 0; //by default there is no heart available if (random(0,10) < 3){//30% of the time... heartState = 1; //signal that a heart will be available heartPosition = random(3,16); // Place the heart randomly } wallPosition = random(3,16); //place wall in column 3 through 15 position = 0; } //if button has been pressed and a jump hasn't been initiated... if ((buttonState == 1)&&(jumpState == 0)){ jumpState = 1; //signal a jump buttonState = 0; //reset button to 'unpressed' in the code } else if (jumpState == 1){ //true if jumpState set to one in the last loop jumpState = 2; //jump is marked as complete } /* * Just like checking for a collision with a wall, check for * a collision with a heart if one is available. */ if ((position == heartPosition)&&(jumpState == 1)){ if (heartState == 1){ lives = lives + 1; //add a life heartState = 0; //reset the heart variable } } if ((position == wallPosition)&&(jumpState != 1)){//if a jump is missed... drawCrash(); lives = lives - 1;//decrease lives by one with each crash /* * If the player has run out of lives, print a message to the screen * and reset the game. */ if (lives == 0){ //if out of lives... // Clear the LCD and write "Game Over" to it lcd.clear(); lcd.setCursor(4,0); lcd.print("Game Over"); delay(2000);//wait two seconds to restart the game //Reset all state variables: lives = 3; position = 0; buttonState = 0; runState = 0; //Reset speeds to 'level one' runDuration = 600; animationDuration = 300; /* * Show the start screen after the 'game over' is shown so that the * next game won't start until the button is pressed again */ startScreen(); } } else if (position == wallPosition){//if the jump is successful... runDuration = runDuration - 50; //speed each position up by 50 ms if (runDuration < 100){//keep runDuration at a minimum of 100 runDuration = 100; } animationDuration = runDuration/2; //Move legs twice per position change } lcd.clear(); runTimer = millis(); } } void drawCrash(){ lcd.clear(); lcd.setCursor(position-1,1); //move cursor one position left of the collision lcd.write(3);//draw 'splatted' JumpMan lcd.setCursor(wallPosition,1); lcd.write(2); //draw the wall delay(1000); // Reset the variables to put the JumpMan back at the starting point position = 0; buttonState = 0; jumpState = 0; } void startScreen(){ lcd.clear(); lcd.setCursor(2,0);//place cursor near the middle of Maker Screen lcd.print("Press button 6"); lcd.setCursor(4,1);//Move to the next line and complete the message lcd.print("to play!"); while (digitalRead(6) == HIGH){//while the button isn't pressed... delay(10); //wait 10 ms and check the 'while' again } while (digitalRead(6) == LOW){ //while the button is pressed... delay(10); //wait 10 ms and check the 'while' again } //After both 'while' loops have completed, clear the screen and complete //the function lcd.clear(); } /* * Now the player can prolong their life by grabbing extra hearts. You may * see a pattern evolving here. To add a feature to the game, you are finding * the exact spot where something should occur: a collision (or not) and using * that moment in time to change a variable in the code. When all of these * moments come together, you have a dynamic game with lots of moving parts. */ //(c) 2017 Let's Start Coding. License: www.letsstartcoding.com/bsdlicense