/* Two Player Pong, with potentiometers instead of Wii Nunchucks by Wayne and Layne, LLC http://wayneandlayne.com v1.1, 1/16/2011 Demonstrates using potentiometers with the Video Game Shield, in a fun and simple pong-like game. We also have a version that uses the Wii Nunchucks as controllers. Connect the wiper of a potentiometer to analog 0 for player 1, and analog 1 for player 2, to be the controllers. Connect the other two pins of the potentiometer to 5v and 0v. For more details on this circuit, please check out our blog post: http://www.wayneandlayne.com/?p=296 Copyright (c) 2011, Wayne and Layne, LLC This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include #include #include TVout TV; #define PADDLE_MOVEMENT 3 #define PADDLE_HEIGHT 10 #define PADDLE_OFFSET 2 byte hres, vres; byte ball_x, ball_y; char ball_dx = 1; char ball_dy = 1; byte score[] = {0, 0}; byte leftpaddle_y, rightpaddle_y; #define BEEP TV.tone(2000, 30) #define STATE_TEST 0 #define STATE_START 1 #define STATE_PLAY 2 #define STATE_MISS 3 byte state = STATE_TEST; byte missed = 0; // who missed? void setup() { TV.begin(_NTSC); TV.select_font(font4x6); TV.delay_frame(60); state = STATE_START; } void draw_scores() { TV.print_char((hres / 4) - 4, 0, '0' + score[0]); TV.print_char((hres / 4) + (hres / 2) - 4, 0, '0' + score[1]); } void draw_paddles() { // clear old paddles TV.draw_rect(0, 0, 1, vres, 0, 0); TV.draw_rect(hres-1, 0, 1, vres, 0, 0); // draw new paddles TV.draw_rect(0, leftpaddle_y, 1, PADDLE_HEIGHT, 1, 1); TV.draw_rect(hres-1, rightpaddle_y, 1, PADDLE_HEIGHT, 1, 1); } void init_display() { // draw dotted vertical middle line for (byte y = 0; y < vres; y += 6) TV.draw_line(hres / 2, y, hres / 2, y + 2, 1); draw_scores(); draw_paddles(); } void draw_ball() { //TV.draw_rect(ball_x, ball_y, 1, 2, 2); TV.set_pixel(ball_x, ball_y, 2); } void reset_ball_and_paddles() { byte noise = analogRead(2); ball_x = (noise & 0x04) ? ((noise & 0x08) ? hres/4 : (hres/4 + hres/2)) : hres / 2; ball_y = (noise & 0x10) ? ((noise & 0x20) ? vres/4 : (vres/4 + vres/2)) : vres / 2; ball_dx = (noise & 0x01) ? 1 : -1; ball_dy = (noise & 0x02) ? -1 : 1; leftpaddle_y = vres / 2; rightpaddle_y = vres / 2; } void loop() { switch (state) { case STATE_TEST: for (byte t = 0; t < 10; t++) { score[0] = 9 - t; score[1] = t; leftpaddle_y = t << 3; rightpaddle_y = t << 2; draw_scores(); draw_paddles(); TV.delay_frame(20); } break; case STATE_START: TV.clear_screen(); TV.print(0, 0, "Pong"); TV.print(0, 10, "Connect A0 and A1 to"); TV.print(0, 20, "potentiometers."); TV.delay_frame(100); hres = TV.hres() - 6; // this is based on what's visible on my tv vres = TV.vres(); TV.clear_screen(); score[0] = 0; score[1] = 0; reset_ball_and_paddles(); init_display(); draw_ball(); // pre-draw the ball so we can erase it state = STATE_PLAY; break; case STATE_PLAY: // top and bottom walls if (ball_y == vres || ball_y == 0) { BEEP; ball_dy *= -1; // TODO fancier angles? } // left and right walls/paddles if (ball_x >= hres - 2) { // right side if (ball_y > rightpaddle_y - PADDLE_OFFSET && ball_y < (rightpaddle_y + PADDLE_HEIGHT + PADDLE_OFFSET) && ball_dx > 0 ) { BEEP; ball_dx = -1; // TODO fancier angles for bounce? } } if (ball_x == hres) { missed = 1; state = STATE_MISS; break; } if (ball_x <= 2) { // left side if (ball_y > leftpaddle_y - PADDLE_OFFSET && ball_y < (leftpaddle_y + PADDLE_HEIGHT + PADDLE_OFFSET) && ball_dx < 0 ) { BEEP; ball_dx = 1; // TODO fancier angles for bounce? } } if (ball_x == 0) { // left side missed missed = 0; state = STATE_MISS; break; } // update paddle positions leftpaddle_y = map(analogRead(0), 0, 1024, 0, vres - PADDLE_HEIGHT); rightpaddle_y = map(analogRead(1), 0, 1024, 0, vres - PADDLE_HEIGHT); /* player1.update(); if (player1.joy_up()) { leftpaddle_y -= PADDLE_MOVEMENT; if (leftpaddle_y > 250) leftpaddle_y = 0; } if (player1.joy_down()) { leftpaddle_y += PADDLE_MOVEMENT; if (leftpaddle_y > (vres - PADDLE_HEIGHT - 1)) leftpaddle_y = vres - PADDLE_HEIGHT; } player2.update(); if (player2.joy_up()) { rightpaddle_y -= PADDLE_MOVEMENT; if (rightpaddle_y>= 250) rightpaddle_y = 0; } if (player2.joy_down()) { rightpaddle_y += PADDLE_MOVEMENT; if (rightpaddle_y > (vres - PADDLE_HEIGHT - 1)) rightpaddle_y = vres - PADDLE_HEIGHT; } */ // update ball position draw_ball(); ball_x += ball_dx; ball_y += ball_dy; draw_paddles(); draw_ball(); TV.delay_frame(1); break; case STATE_MISS: // someone missed score[(missed + 1) & 0x01]++; if (score[(missed + 1) & 0x01] == 10) { // winner winner, chicken dinner // TODO make this look nicer TV.printPGM((missed) ? (8) : (hres / 2 + 8), 15, PSTR("Winner!")); TV.delay_frame(120); state = STATE_START; } else { TV.tone(500, 30); TV.printPGM((missed) ? (hres / 2 + 8) : (8), ball_y - 4, PSTR("Missed!")); TV.delay_frame(40); reset_ball_and_paddles(); TV.clear_screen(); init_display(); draw_ball(); // pre-draw the ball so we can erase it state = STATE_PLAY; } break; } // end of main FSM }