File content as of revision 8:ebddb721f1ee:

#include "mbed.h"
#include "N5110.h"
#include "GameScreen.h"



//need to extend on initialization to set some variables
void GameScreen::Initialize()
{
    init();
    
    playerBall.x = maxX_/2;
    playerBall.y = maxY_ - (int)(maxY_/3 * 2) - 5;
    
    createAllPlatforms(); 
}

//draw platform
//  ___________  ________  < y
//               ^ x       
void GameScreen::drawPlatform(int x,int y)
{    
    for (int a = 0; a < 48; a ++)
    {
        for (int b = y; b < (y+platThickness_); b++)
        {
            //skip pixels of gap
            if (a > x && a < (x + platGapSize_))
                break;
                
            
            
            //skip pixels below maxY (lets platforms 'emerge' instead of 'appear')
            if (b > (maxY_ - 1))
                break;
            
            setPixel(b,a);    
        }
    }
}

//erase platform
void GameScreen::erasePlatform(int y)
{
    for (int a = 0; a < 48; a ++)
    {
        for (int b = y; b < (y+platThickness_); b++)
        {            
            //skip pixels below maxY (lets platforms 'emerge' instead of 'appear')
            if (b > (maxY_ - 1))
                break;
            
            clearPixel(b,a);    
        }
    }
}

//draw the player ball where (x,y) is top right corner.
//      XXP <-- P(x,y) 
//     XXXX
//     XXXX
//      XX    
void GameScreen::drawBall()
{   
    //more elegant ways to do this...but this is most efficient
    setPixel(playerBall.y,playerBall.x+1);
    setPixel(playerBall.y,playerBall.x+2);
    setPixel(playerBall.y+1,playerBall.x);
    setPixel(playerBall.y+1,playerBall.x+1);
    setPixel(playerBall.y+1,playerBall.x+2);
    setPixel(playerBall.y+1,playerBall.x+3);
    setPixel(playerBall.y+2,playerBall.x);
    setPixel(playerBall.y+2,playerBall.x+1);
    setPixel(playerBall.y+2,playerBall.x+2);
    setPixel(playerBall.y+2,playerBall.x+3);
    setPixel(playerBall.y+3,playerBall.x+1);
    setPixel(playerBall.y+3,playerBall.x+2);    
}

//draw the player ball where (x,y) is top right corner.
void GameScreen::eraseBall()
{   
    clearPixel(playerBall.y,playerBall.x+1);
    clearPixel(playerBall.y,playerBall.x+2);
    clearPixel(playerBall.y+1,playerBall.x);
    clearPixel(playerBall.y+1,playerBall.x+1);
    clearPixel(playerBall.y+1,playerBall.x+2);
    clearPixel(playerBall.y+1,playerBall.x+3);
    clearPixel(playerBall.y+2,playerBall.x);
    clearPixel(playerBall.y+2,playerBall.x+1);
    clearPixel(playerBall.y+2,playerBall.x+2);
    clearPixel(playerBall.y+2,playerBall.x+3);
    clearPixel(playerBall.y+3,playerBall.x+1);
    clearPixel(playerBall.y+3,playerBall.x+2);     
}

void GameScreen::createAllPlatforms() 
{            
    for (int n = 0; n < numPlatforms_ ; n++)
    {
        Platform *newPlatform = new Platform;
        newPlatform->id = n;
        newPlatform->x = rand() % (maxX_-platGapSize_ + 1) - 1;     // 'randomlly' place gap somewhere on platform *NOTE: need RTC for this game to be unpredictable...
        newPlatform->y = maxY_ - n*platSpacing_ - platThickness_ + 1;   
        allPlatforms[n] = newPlatform;
    }
}

void GameScreen::freeAllPlatforms()
{
    for (int n = 0; n < numPlatforms_ ; n++)
    {
        delete allPlatforms[n];
    }    
}

void GameScreen::drawAllPlatforms()
{
    for (int n = 0; n < numPlatforms_ ; n++)
    {
        drawPlatform (allPlatforms[n]->x,allPlatforms[n]->y);
    } 
}

void GameScreen::eraseAllPlatforms()
{
    for (int n = 0; n < numPlatforms_ ; n++)
    {
        erasePlatform (allPlatforms[n]->y);
    } 
}

void GameScreen::shiftAllPlatforms()
{
    for (int n = 0; n < numPlatforms_ ; n++)
    {
        if (allPlatforms[n]->y > (platThickness_))
            allPlatforms[n]->y = allPlatforms[n]->y - 1;
        else
        {
            allPlatforms[n]->y =  maxY_ - platThickness_ + 1; //send back to bottom.
            //allPlatforms[n]->x = rand() % (maxX_-platGapSize_ + 1) - 1; //select a new random position of gap!
            
        }
    }
}

Platform GameScreen::nextClosestPlatform(int y)
{
    int closestY = 15;
    Platform closestPlatform;
    
    for (int i = 0; i < numPlatforms_; i++)
    {
        if ((allPlatforms[i]->y - y) < closestY && (allPlatforms[i]->y - y) >= -1)
        {
            closestY = allPlatforms[i]->y;
            closestPlatform = *allPlatforms[i];            
        }
    }
    return closestPlatform;
}

//@Override of base class function
//had to override and rewrite since N5110 is written to write horizontal this needs vertical
// this function reads existing font5x7 and rotate matrix to become font7x5 matrix.
//
// for example the number 4 font5x7 = 0x18,0x14,0x12,0x7F,0x10
//                          font7x5 = 0x02,0x06,0x10,0x12,0x1E,0x2,0x2
//then it is printed!
void GameScreen::printString(const char * str,int x,int y)
{
    while (*str)
    {
        //each byte in row
        for (int i = 0; i < 5; i++)
        {
            //each bit in byte
            for (int b = 0; b < 7; b++)
            {
                
                if (font5x7[(*str - 32)*5 + i] & (1<<b)) //bitwise comparison to mask at desired pixel
                {             
                    setPixel(y+b+1,x-i+1);                    
                }
                else
                {
                    clearPixel(y+b+1,x-i+1); 
                }   
            }    
        }        
        str ++;
        x -= 6;
    }
    refresh();     
}

void GameScreen::displayStartScreen()
{
    clear();
    printString("LET",maxX_ - 14,-1);   
    printString("THE BALL",maxX_ - 2,7);
    printString("DROP!",maxX_ - 12,16);
    printString("This way",maxX_ - 2,30);
    printString("------->",maxX_ - 2,37);
    printString("TO PLAY!",maxX_ - 2,45);
    printString("by: ",maxX_ - 2,61);
    printString("Thomas",maxX_ - 9,69);
    printString("Davies",maxX_ - 9,76);
    refresh();    
}

void GameScreen::displayInstructionScreen()
{
    clear();
    printString("Hi Ball,",maxX_ - 2,-1);
    printString("You are",maxX_ - 2,7);
    printString("TRAPPED!",maxX_ - 2,15);
    printString("Use the ",maxX_ - 2,23);
    printString("joystick",maxX_ - 2,32);
    printString("to move.",maxX_ - 2,39);
    printString("Don't",maxX_ - 2,47);
    printString("hit the",maxX_ - 2,55);
    printString("roof!",maxX_ - 2,63);
    printString("------->",maxX_ - 2,75);    
    refresh();    
}

void GameScreen::displayCountdown()
{
    clear();
    Timer countdown;
    char buffer[10];
    countdown.start();
    printString("Survive!",maxX_ - 2,10);
    
    
    int prevTime = -1;
    while (countdown.read() < 5)
    {
        if (floor(countdown.read()) > prevTime)
        {
            sprintf(buffer,"..%1.0f..",(5 - floor(countdown.read())));
            printString(buffer,maxX_ - 10,20 + 10*countdown.read());
            prevTime = countdown.read(); 
        }
    }
    refresh();
    countdown.stop();     
}