Diff: Ball.cpp

Revision:

0:3d0db4e183ee

Child:

2:74bc9b16fb88

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Ball.cpp	Fri Feb 06 09:51:06 2015 +0000
@@ -0,0 +1,134 @@
+#include "Ball.h"
+
+Ball::Ball() : vSpeed()
+{   // constructor
+}
+
+Ball::Ball(LCD_ST7735* pDisp) : vSpeed()
+{   // constructor
+    this->pDisp=pDisp;
+    this->fActive=false;
+}
+
+uint16_t Ball::dimmedColor(uint16_t uColor)
+{
+    uint16_t r, g, b;
+   
+    r=(uColor >> 11) <<3;
+    g=((uColor >> 5) & 0x3F) <<2;
+    b=(uColor & 0x1F) << 3;
+    r=r*2/3;
+    g=g*2/3;
+    b=b*2/3;
+//    r=r/2;
+//    g=g/2;
+//    b=b/2;
+
+    return(Color565::fromRGB((uint16_t)r,(uint16_t)g,(uint16_t)b));
+}
+
+void Ball::initialize(int nX, int nY, int nR, uint16_t uColor)
+{
+    this->pos.set(nX, nY);
+    this->nRadius=nR;
+    this->uColor=uColor;
+    this->uColorHigh=uColor;
+    this->uColorMid=dimmedColor(uColorHigh);
+    this->uColorLow=dimmedColor(uColorMid);
+
+}
+
+void Ball::setSpeed(int X, int Y)
+{
+    this->vSpeed.set(X, Y);
+}
+
+void Ball::changeSpeed(bool fUp)
+{
+    if(fUp)
+    {
+        if(this->vSpeed.getSize()<=4.0) this->vSpeed.add(1.0);
+    }
+    else
+    {
+        if(this->vSpeed.getSize()>=1.0)
+            this->vSpeed.add(-1.0);
+        else        // TODO: added code below to allow zero speed pause of ball
+            this->vSpeed.set(0,0);
+    }
+}
+
+void Ball::unmove()
+{   // move back to previous position
+    pos.set(pos.getPrev());
+}
+
+void Ball::update()
+{
+    this->pos.move(this->vSpeed);
+}
+
+Circle Ball::getBoundingCircle()
+{
+    return(Circle(this->pos.getX(), this->pos.getY(), this->nRadius));
+}
+
+bool Ball::collides(Rectangle r)
+{
+    Circle cBall=this->getBoundingCircle();
+    Rectangle rBall=cBall.getBoundingRectangle();
+
+/*    
+char szBuffer[256];
+sprintf(szBuffer, "c:%d,%d      ", cBall.getX(), cBall.getY());
+this->pDisp->drawString(font_oem, 0, 0, szBuffer);
+*/
+    return(rBall.collides(r));
+}
+
+void Ball::Bounce(Vector vBounce)
+{   // change the direction in a certain direction
+    this->unmove(); // undo move to pre-bouncing position to avoid drawing on colliding position
+
+    this->vSpeed.multiply(vBounce);
+
+    // check speed w/max
+    if(this->vSpeed.y>5.0) this->vSpeed.y=5;
+}
+
+
+
+void Ball::clear()
+{
+    Point p=pos.getCur();
+    this->pDisp->fillCircle(p.getX(),p.getY(), this->nRadius, Color565::Black, Color565::Black);
+}
+
+void Ball::clearPrev()
+{
+    Point p=pos.getPrev();
+    this->pDisp->fillCircle(p.getX(),p.getY(), this->nRadius, Color565::Black, Color565::Black);
+}
+
+
+void Ball::draw()
+{   // render the object on the screen, based on its current position
+    Point p=pos.getCur();
+    if(this->nRadius>3)
+    {
+        this->pDisp->fillCircle(p.getX(), p.getY(), this->nRadius, this->uColorLow, this->uColorLow);
+        this->pDisp->fillCircle(p.getX()-this->nRadius/3, p.getY()-this->nRadius/3, this->nRadius/2, this->uColorMid, this->uColorMid);
+        this->pDisp->setPixel(p.getX()-this->nRadius/2, p.getY()-this->nRadius/2, this->uColorHigh);
+    }
+    else
+        this->pDisp->fillCircle(p.getX(), p.getY(), this->nRadius, this->uColorMid, this->uColorMid);
+}
+
+void Ball::redraw()
+{   // redraw the ball if its position has changed
+    if(pos.hasChanged())
+    {
+        clearPrev();
+        draw();
+    }
+}
\ No newline at end of file