Maxint R&D / RETRO_BallsAndThings

Elements used in the Balls and Things games for the RETRO.

Dependents:   RETRO_BallsAndPaddle RETRO_BallAndHoles

Ball.cpp@8:19dd2a538cbe, 2015-03-02 (annotated)

Committer:
maxint
Date:
Mon Mar 02 09:58:53 2015 +0000
Revision:
8:19dd2a538cbe
Parent:
7:4fa3edaa1201 
more clean-up

Who changed what in which revision?

UserRevisionLine numberNew contents of line
maxint 0:3d0db4e183ee 1 #include "Ball.h"
maxint 0:3d0db4e183ee 2
maxint 0:3d0db4e183ee 3 Ball::Ball() : vSpeed()
maxint 0:3d0db4e183ee 4 { // constructor
maxint 0:3d0db4e183ee 5 }
maxint 0:3d0db4e183ee 6
maxint 0:3d0db4e183ee 7 Ball::Ball(LCD_ST7735* pDisp) : vSpeed()
maxint 0:3d0db4e183ee 8 { // constructor
maxint 0:3d0db4e183ee 9 this->pDisp=pDisp;
maxint 0:3d0db4e183ee 10 this->fActive=false;
maxint 0:3d0db4e183ee 11 }
maxint 0:3d0db4e183ee 12
maxint 0:3d0db4e183ee 13 uint16_t Ball::dimmedColor(uint16_t uColor)
maxint 0:3d0db4e183ee 14 {
maxint 0:3d0db4e183ee 15 uint16_t r, g, b;
maxint 0:3d0db4e183ee 16
maxint 0:3d0db4e183ee 17 r=(uColor >> 11) <<3;
maxint 0:3d0db4e183ee 18 g=((uColor >> 5) & 0x3F) <<2;
maxint 0:3d0db4e183ee 19 b=(uColor & 0x1F) << 3;
maxint 0:3d0db4e183ee 20 r=r*2/3;
maxint 0:3d0db4e183ee 21 g=g*2/3;
maxint 0:3d0db4e183ee 22 b=b*2/3;
maxint 0:3d0db4e183ee 23
maxint 0:3d0db4e183ee 24 return(Color565::fromRGB((uint16_t)r,(uint16_t)g,(uint16_t)b));
maxint 0:3d0db4e183ee 25 }
maxint 0:3d0db4e183ee 26
maxint 0:3d0db4e183ee 27 void Ball::initialize(int nX, int nY, int nR, uint16_t uColor)
maxint 0:3d0db4e183ee 28 {
maxint 0:3d0db4e183ee 29 this->pos.set(nX, nY);
maxint 0:3d0db4e183ee 30 this->nRadius=nR;
maxint 0:3d0db4e183ee 31 this->uColor=uColor;
maxint 0:3d0db4e183ee 32 this->uColorHigh=uColor;
maxint 0:3d0db4e183ee 33 this->uColorMid=dimmedColor(uColorHigh);
maxint 0:3d0db4e183ee 34 this->uColorLow=dimmedColor(uColorMid);
maxint 0:3d0db4e183ee 35
maxint 0:3d0db4e183ee 36 }
maxint 0:3d0db4e183ee 37
maxint 0:3d0db4e183ee 38 void Ball::setSpeed(int X, int Y)
maxint 0:3d0db4e183ee 39 {
maxint 0:3d0db4e183ee 40 this->vSpeed.set(X, Y);
maxint 0:3d0db4e183ee 41 }
maxint 0:3d0db4e183ee 42
maxint 0:3d0db4e183ee 43 void Ball::changeSpeed(bool fUp)
maxint 0:3d0db4e183ee 44 {
maxint 0:3d0db4e183ee 45 if(fUp)
maxint 0:3d0db4e183ee 46 {
maxint 0:3d0db4e183ee 47 if(this->vSpeed.getSize()<=4.0) this->vSpeed.add(1.0);
maxint 0:3d0db4e183ee 48 }
maxint 0:3d0db4e183ee 49 else
maxint 0:3d0db4e183ee 50 {
maxint 0:3d0db4e183ee 51 if(this->vSpeed.getSize()>=1.0)
maxint 0:3d0db4e183ee 52 this->vSpeed.add(-1.0);
maxint 0:3d0db4e183ee 53 else // TODO: added code below to allow zero speed pause of ball
maxint 0:3d0db4e183ee 54 this->vSpeed.set(0,0);
maxint 0:3d0db4e183ee 55 }
maxint 0:3d0db4e183ee 56 }
maxint 0:3d0db4e183ee 57
maxint 0:3d0db4e183ee 58 void Ball::unmove()
maxint 0:3d0db4e183ee 59 { // move back to previous position
maxint 0:3d0db4e183ee 60 pos.set(pos.getPrev());
maxint 0:3d0db4e183ee 61 }
maxint 0:3d0db4e183ee 62
maxint 0:3d0db4e183ee 63 void Ball::update()
maxint 0:3d0db4e183ee 64 {
maxint 0:3d0db4e183ee 65 this->pos.move(this->vSpeed);
maxint 0:3d0db4e183ee 66 }
maxint 0:3d0db4e183ee 67
maxint 0:3d0db4e183ee 68 Circle Ball::getBoundingCircle()
maxint 0:3d0db4e183ee 69 {
maxint 0:3d0db4e183ee 70 return(Circle(this->pos.getX(), this->pos.getY(), this->nRadius));
maxint 0:3d0db4e183ee 71 }
maxint 0:3d0db4e183ee 72
maxint 0:3d0db4e183ee 73 bool Ball::collides(Rectangle r)
maxint 0:3d0db4e183ee 74 {
maxint 0:3d0db4e183ee 75 Circle cBall=this->getBoundingCircle();
maxint 0:3d0db4e183ee 76 Rectangle rBall=cBall.getBoundingRectangle();
maxint 0:3d0db4e183ee 77
maxint 0:3d0db4e183ee 78 /*
maxint 0:3d0db4e183ee 79 char szBuffer[256];
maxint 0:3d0db4e183ee 80 sprintf(szBuffer, "c:%d,%d ", cBall.getX(), cBall.getY());
maxint 0:3d0db4e183ee 81 this->pDisp->drawString(font_oem, 0, 0, szBuffer);
maxint 0:3d0db4e183ee 82 */
maxint 0:3d0db4e183ee 83 return(rBall.collides(r));
maxint 0:3d0db4e183ee 84 }
maxint 0:3d0db4e183ee 85
maxint 5:065f19e08dcb 86 bool Ball::collides(Circle cObject)
maxint 5:065f19e08dcb 87 {
maxint 5:065f19e08dcb 88 Circle cBall=this->getBoundingCircle();
maxint 5:065f19e08dcb 89 Rectangle rBall=cBall.getBoundingRectangle();
maxint 5:065f19e08dcb 90 Rectangle rObject=cObject.getBoundingRectangle();
maxint 5:065f19e08dcb 91
maxint 5:065f19e08dcb 92 return(rBall.collides(rObject));
maxint 5:065f19e08dcb 93 }
maxint 5:065f19e08dcb 94
maxint 5:065f19e08dcb 95
maxint 3:441dc90d10ce 96 bool Ball::collides(Line ln)
maxint 3:441dc90d10ce 97 {
maxint 3:441dc90d10ce 98 Circle cBall=this->getBoundingCircle();
maxint 3:441dc90d10ce 99 return(cBall.collides(ln));
maxint 3:441dc90d10ce 100 }
maxint 3:441dc90d10ce 101
maxint 0:3d0db4e183ee 102 void Ball::Bounce(Vector vBounce)
maxint 0:3d0db4e183ee 103 { // change the direction in a certain direction
maxint 0:3d0db4e183ee 104 this->unmove(); // undo move to pre-bouncing position to avoid drawing on colliding position
maxint 0:3d0db4e183ee 105
maxint 0:3d0db4e183ee 106 this->vSpeed.multiply(vBounce);
maxint 0:3d0db4e183ee 107
maxint 0:3d0db4e183ee 108 // check speed w/max
maxint 0:3d0db4e183ee 109 if(this->vSpeed.y>5.0) this->vSpeed.y=5;
maxint 2:74bc9b16fb88 110 if(this->vSpeed.x>5.0) this->vSpeed.x=5;
maxint 2:74bc9b16fb88 111 if(this->vSpeed.y<-5.0) this->vSpeed.y=-5;
maxint 2:74bc9b16fb88 112 if(this->vSpeed.x<-5.0) this->vSpeed.x=-5;
maxint 2:74bc9b16fb88 113 }
maxint 2:74bc9b16fb88 114
maxint 2:74bc9b16fb88 115 void Ball::BounceAgainst(Vector vBounce)
maxint 2:74bc9b16fb88 116 { // change the direction in a certain direction
maxint 2:74bc9b16fb88 117 this->unmove(); // undo move to pre-bouncing position to avoid drawing on colliding position
maxint 2:74bc9b16fb88 118
maxint 2:74bc9b16fb88 119 //this->vSpeed.multiply(vBounce);
maxint 2:74bc9b16fb88 120 this->vSpeed.bounce(vBounce);
maxint 2:74bc9b16fb88 121
maxint 2:74bc9b16fb88 122 // check speed w/max
maxint 2:74bc9b16fb88 123 if(this->vSpeed.y>5.0) this->vSpeed.y=5;
maxint 2:74bc9b16fb88 124 if(this->vSpeed.x>5.0) this->vSpeed.x=5;
maxint 2:74bc9b16fb88 125 if(this->vSpeed.y<-5.0) this->vSpeed.y=-5;
maxint 2:74bc9b16fb88 126 if(this->vSpeed.x<-5.0) this->vSpeed.x=-5;
maxint 2:74bc9b16fb88 127
maxint 7:4fa3edaa1201 128 // if(abs(vSpeed.x)>abs(vSpeed.y))
maxint 7:4fa3edaa1201 129 // vSpeed.x=vSpeed.x/abs(vSpeed.x) * abs(vSpeed.y);
maxint 0:3d0db4e183ee 130 }
maxint 0:3d0db4e183ee 131
maxint 0:3d0db4e183ee 132
maxint 0:3d0db4e183ee 133
maxint 0:3d0db4e183ee 134 void Ball::clear()
maxint 0:3d0db4e183ee 135 {
maxint 0:3d0db4e183ee 136 Point p=pos.getCur();
maxint 0:3d0db4e183ee 137 this->pDisp->fillCircle(p.getX(),p.getY(), this->nRadius, Color565::Black, Color565::Black);
maxint 0:3d0db4e183ee 138 }
maxint 0:3d0db4e183ee 139
maxint 0:3d0db4e183ee 140 void Ball::clearPrev()
maxint 0:3d0db4e183ee 141 {
maxint 0:3d0db4e183ee 142 Point p=pos.getPrev();
maxint 0:3d0db4e183ee 143 this->pDisp->fillCircle(p.getX(),p.getY(), this->nRadius, Color565::Black, Color565::Black);
maxint 0:3d0db4e183ee 144 }
maxint 0:3d0db4e183ee 145
maxint 0:3d0db4e183ee 146
maxint 0:3d0db4e183ee 147 void Ball::draw()
maxint 0:3d0db4e183ee 148 { // render the object on the screen, based on its current position
maxint 0:3d0db4e183ee 149 Point p=pos.getCur();
maxint 0:3d0db4e183ee 150 if(this->nRadius>3)
maxint 0:3d0db4e183ee 151 {
maxint 0:3d0db4e183ee 152 this->pDisp->fillCircle(p.getX(), p.getY(), this->nRadius, this->uColorLow, this->uColorLow);
maxint 0:3d0db4e183ee 153 this->pDisp->fillCircle(p.getX()-this->nRadius/3, p.getY()-this->nRadius/3, this->nRadius/2, this->uColorMid, this->uColorMid);
maxint 0:3d0db4e183ee 154 this->pDisp->setPixel(p.getX()-this->nRadius/2, p.getY()-this->nRadius/2, this->uColorHigh);
maxint 0:3d0db4e183ee 155 }
maxint 0:3d0db4e183ee 156 else
maxint 0:3d0db4e183ee 157 this->pDisp->fillCircle(p.getX(), p.getY(), this->nRadius, this->uColorMid, this->uColorMid);
maxint 0:3d0db4e183ee 158 }
maxint 0:3d0db4e183ee 159
maxint 0:3d0db4e183ee 160 void Ball::redraw()
maxint 0:3d0db4e183ee 161 { // redraw the ball if its position has changed
maxint 0:3d0db4e183ee 162 if(pos.hasChanged())
maxint 0:3d0db4e183ee 163 {
maxint 0:3d0db4e183ee 164 clearPrev();
maxint 0:3d0db4e183ee 165 draw();
maxint 0:3d0db4e183ee 166 }
maxint 0:3d0db4e183ee 167 }