Diff: PushingEngine/PushingEngine.cpp

Revision:

2:9f0d9516a6cd

Child:

3:9fa31396d89d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PushingEngine/PushingEngine.cpp	Sun Mar 24 10:45:30 2019 +0000
@@ -0,0 +1,187 @@
+#include "PushingEngine.h"
+
+PushingEngine::PushingEngine()
+{
+
+}
+
+PushingEngine::~PushingEngine()
+{
+
+}
+
+void PushingEngine::init(int box1_x,int box1_y,int box2_x,int box2_y,
+                         int ppl_x,int ppl_y,
+                         int cross1_x,int corss2_x,int cross1_x,int cross2_y)
+{
+    // boxes position on screen 
+    _b1x = box1_x;
+    _b2x = box2_x;
+    _b1y = box1_y;
+    _b2y = box2_y;
+    
+    // ppl position on screen
+    _pplx = ppl_x;
+    _pply = ppl_y;
+    
+    //cross position on screen
+    _c1x = cross1_x;
+    _c2x = cross2_x;
+    _c1y = cross1_y;
+    _c2y = cross2_y;
+    
+    // inital boxes cross and ppl
+    _b1.init(_b1x,_b1y);
+    _b2.init(_b2x,_b2y);
+    _ppl.init(_pplx,_pply);
+    _c1.init(_c1x,_c1y);
+    _c2.init(_c2x,_c2y);
+}
+
+void PushingEngine::read_input(Gamepad &pad)
+{
+    _d = pad.get_direction(); // return direction of joystick
+    _mag = pad.get_mag(); 
+}
+
+void PushingEngine::draw(N5110 &lcd)
+{
+    // draw the elements in the LCD buffer
+    // pitch
+    lcd.drawRect(0,0,WIDTH,HEIGHT,FILL_TRANSPARENT);
+    // scores
+    print_scores(lcd);
+    // boxes
+    _b1.draw(lcd);
+    _b2.draw(lcd);
+    // ppl
+    _ppl.draw(lcd);
+    //cross
+    _c1.draw(lcd);
+    _c2.draw(lcd);
+}
+
+void PushingEngine::update(Gamepad &pad)
+{
+    check_goal(pad);
+    // important to update boxes and crosses before checking collisions so can
+    // correct for it before updating the display
+    _b1.update(_d,_mag);
+    _b2.update(_d,_mag);
+    _ppl.update();
+    _c1.update();
+    _c2.update();
+
+    //check_wall_collision(pad);
+    //check_paddle_collisions(pad);
+}
+
+void PushingEngine::check_wall_collision(Gamepad &pad)
+{
+    // read current ball attributes
+    Vector2D box1_pos = _b1.get_pos();
+    Vector2D box2_pos = _b2.get_pos();
+
+    // check if topleft touch wall
+    if (box1_pos.y <= 1 ||box1_pos.x <= 1) {  //  1 due to 1 pixel boundary
+        box1_pos.y = 1;  // keep the position at (1,1)
+        // audio feedback
+        pad.tone(750.0,0.1);
+    }
+    // check if hit bottom wall
+    else if (ball_pos.y + _ball_size >= (HEIGHT-1) ) { // bottom pixel is 47
+        // hit bottom
+        ball_pos.y = (HEIGHT-1) - _ball_size;  // stops ball going off screen
+        ball_velocity.y = -ball_velocity.y;
+        // audio feedback
+        pad.tone(750.0,0.1);
+    }
+
+    // update ball parameters
+    _ball.set_velocity(ball_velocity);
+    _ball.set_pos(ball_pos);
+}
+
+void PushingEngine::check_paddle_collisions(Gamepad &pad)
+{
+    // read current ball attributes
+    Vector2D ball_pos = _ball.get_pos();
+    Vector2D ball_velocity = _ball.get_velocity();
+
+    // check p1 first
+    Vector2D p1_pos = _p1.get_pos();
+
+    // see if ball has hit the paddle by checking for overlaps
+    if (
+        (ball_pos.y >= p1_pos.y) && //top
+        (ball_pos.y <= p1_pos.y + _paddle_height) && //bottom
+        (ball_pos.x >= _p1x) && //left
+        (ball_pos.x <= _p1x + _paddle_width)  //right
+    ) {
+        // if it has, fix position and reflect x velocity
+        ball_pos.x = _p1x + _paddle_width;
+        ball_velocity.x = -ball_velocity.x;
+        // audio feedback
+        pad.tone(1000.0,0.1);
+    }
+
+    // check p2 next
+    Vector2D p2_pos = _p2.get_pos();
+
+    // see if ball has hit the paddle by checking for overlaps
+    if (
+        (ball_pos.y >= p2_pos.y) && //top
+        (ball_pos.y <= p2_pos.y + _paddle_height) && //bottom
+        (ball_pos.x + _ball_size >= _p2x) && //left
+        (ball_pos.x + _ball_size <= _p2x + _paddle_width)  //right
+    ) {
+        // if it has, fix position and reflect x velocity
+        ball_pos.x = _p2x - _ball_size;
+        ball_velocity.x = -ball_velocity.x;
+        // audio feedback
+        pad.tone(1000.0,0.1);
+    }
+
+    // write new attributes
+    _ball.set_velocity(ball_velocity);
+    _ball.set_pos(ball_pos);
+}
+
+void PongEngine::check_goal(Gamepad &pad)
+{
+    Vector2D ball_pos = _ball.get_pos();
+    // P2 has scored
+    if (ball_pos.x + _ball_size < 0) {
+        _p2.add_score();
+        _ball.init(_ball_size,_speed);
+        pad.tone(1500.0,0.5);
+        pad.leds_on();
+        wait(0.5);
+        pad.leds_off();
+    }
+
+    // P1 has scored
+    if (ball_pos.x > WIDTH) {
+        _p1.add_score();
+        _ball.init(_ball_size,_speed);
+        pad.tone(1500.0,0.5);
+        pad.leds_on();
+        wait(0.5);
+        pad.leds_off();
+    }
+}
+
+void PongEngine::print_scores(N5110 &lcd)
+{
+    // get scores from paddles
+    int p1_score = _p1.get_score();
+    int p2_score = _p2.get_score();
+
+    // print to LCD i
+    char buffer1[14];
+    sprintf(buffer1,"%2d",p1_score);
+    lcd.printString(buffer1,WIDTH/2 - 20,1);  // font is 8 wide, so leave 4 pixel gape from middle assuming two digits
+    char buffer2[14];
+    sprintf(buffer2,"%2d",p2_score);
+    lcd.printString(buffer2,WIDTH/2 + 4,1);
+}
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