Diff: predators/Predator.cpp

Revision:

2:5e54476c518f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/predators/Predator.cpp	Tue May 26 07:24:21 2020 +0000
@@ -0,0 +1,75 @@
+#include "Predator.h"
+
+// blank constructor 
+Predator::Predator()
+{
+
+}
+//blank destructor
+Predator::~Predator()
+{
+
+}
+
+void Predator::init(int x,int radius)
+{    _radius = radius;
+    _x = WIDTH/2 - radius;  // x depends on width of the screen and height of predator
+    _y = HEIGHT/2 - radius;  // y depends on height of screen and height of predator
+    _speed = 1;  // default speed
+    _point = 0;  // start the points from zero
+
+}
+
+    void Predator::draw(LCD &lcd)
+{
+    // draw predator in screen buffer. 
+    lcd.drawCircle(_x,_y,_radius,FILL_BLACK);
+    
+}
+
+void Predator::update(Direction pred,float mag)
+{
+    _speed = int(mag*10.0f);  // scale is arbitrary, could be changed in future
+
+    // Update x and y values depending on the movement  direction
+    // North is decrement as origin is at the top-left so decreasing moves up
+    // West is decrement as origin is at the top-left so decreasing Left
+    if (pred == N) {
+        _y-=_speed;
+    } else if (pred == S) {
+        _y+=_speed;
+    }
+     else if (pred == W) {
+        _x-=_speed;
+    } else if (pred == E) {
+        _x+=_speed;
+    }
+
+    // check the y origin to ensure that the predator doesn't go off screen
+    if (_y < 1) {
+        _y = 1;
+    }
+    if (_x < 1) {
+        _x = 1;
+    }
+    if (_y > HEIGHT - _radius*2 - 1) {
+        _y = HEIGHT - _radius*2 - 1;
+    }
+    if (_x> WIDTH - _radius*2 - 1) {
+        _x = WIDTH - _radius*2 - 1;
+    }
+}
+
+void Predator::add_points()
+{
+    _point++;
+}
+int Predator::get_points()
+{
+    return _point;
+}
+
+POS2D Predator::get_pos() {
+    POS2D p = {_x,_y};
+    return p;    
+}
\ No newline at end of file