Diff: ball.cpp

Revision:

0:2353da390056

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ball.cpp	Mon Dec 12 21:35:42 2011 +0000
@@ -0,0 +1,100 @@
+#include "mbed.h"
+#include "ball.h"
+
+Ball::Ball() {
+  int x=y=width=height=color=xInc=yInc=0;
+}
+
+Ball::Ball(int x, int y, int w, int h, int c, int xi, int yi)
+ : x(x), y(y), width(w), height(h), color(c), xInc(xi), yInc(yi) {}
+ 
+ 
+/* 
+ * Member Function move:
+ * Description: Colors in the previous ball black
+ *  and moves ball to new position.
+ */
+void Ball::move(ST7735_TFT &lcd) {
+  draw(lcd, true);
+  x += xInc; y += yInc;
+}
+
+/* 
+ * Member Function draw:
+ * Description: Draws object on screen
+ *  if isBlack, color in black.
+ */
+void Ball::draw(ST7735_TFT &lcd, bool isBlack) const {
+  lcd.fillrect(x, y, x+width, y+height, (isBlack) ? 0x000000 : color);
+}
+
+int Ball::size() const {
+  return width*height;
+}
+
+int Ball::getX() const {
+  return x;
+}
+
+int Ball::getY() const {
+  return y;
+}
+
+bool Ball::hitX() {
+  return (x+width<=width) || (x+width>=160);
+}
+
+bool Ball::hitY() {
+  return (y<=0) || (y+height>=128);
+}
+
+/* 
+ * Member Function hitP1:
+ * Description: Checks to see if there is
+ *  a collision between paddle1 and the ball.
+ *  Has special functionality for changing
+ *  y-incline based on collision point.
+ */
+bool Ball::hitP1(int _x, int _y, int _height) {
+  bool hit = ((_x>=x) && (xInc<0)) && 
+         (((_y<=y) && (_y+_height>=y+height)) ||
+          ((_y>=y) && (_y<=y+height)) ||
+          ((_y+_height>=y) && (_y+_height<=y+height))
+         );
+  if(hit) {
+    if(_y+_height-y < 4 && yInc>0) yInc = 2;
+    if(y-_y < 4 && yInc<0) yInc = -2;
+    else yInc = (yInc>0) ? 1 : -1;
+  }
+  return hit;
+}
+
+
+/* 
+ * Member Function hitP2:
+ * Description: Checks to see if there is
+ *  a collision between paddle2 and the ball.
+ *  Has special functionality for changing
+ *  y-incline based on collision point.
+ */
+bool Ball::hitP2(int _x, int _y, int _height) {
+  bool hit = ((_x<=x+width) && (xInc>0)) && 
+         (((_y<=y) && (_y+_height>=y+height)) ||
+          ((_y>=y) && (_y<=y+height)) ||
+          ((_y+_height>=y) && (_y+_height<=y+height))
+         );
+  if(hit) {
+    if(_y+_height-y < 4 && yInc>0) yInc = 2;
+    if(y-_y < 4 && yInc<0) yInc = -2;
+    else yInc = (yInc>0) ? 1 : -1;
+  }
+  return hit;
+}
+
+void Ball::reverseX() {
+  xInc *= -1;
+}
+
+void Ball::reverseY() {
+  yInc *= -1;
+}
\ No newline at end of file