File content as of revision 9:1ddb8dc93e48:

#include "Map.h"
#define MAP_TERRAIN_Y_POSITION 42
Serial usb(USBTX, USBRX); 
Map::Map() {
    
}
 
Map::~Map() {
    
}

void Map::init(AnalogIn &adc) {
    position_x_map_ = -84;
    position_y_map_ = MAP_TERRAIN_Y_POSITION;
    get_random_height_array(adc);
    get_random_length_array(adc);
    //usb.printf("randome seed = %f\n", rand_seed_);
    map_length_ = 0;
}

void Map::get_random_height_array(AnalogIn &adc){
    srand(adc.read()*64000);
    for(int i = 0; i < 11; i++){
        rand_heights_[i]= rand() % 8 + 5;
    }   
    //printf loop to check correct random numbers are generated
    //for (int i = 0; i < 12; i++){ 
       //usb.printf("map height random array = %d\n", rand_heights_[i]);
    //}
}

void Map::get_random_length_array(AnalogIn &adc){
    srand(adc.read()*64000);
    for(int i = 0; i < 11; i++){
        rand_lengths_[i]= rand() % 16+ 15;
    }   
}

void Map::draw_triangle(N5110 &lcd,int triangle_height){ 
    // draws triangle by drawing two lines with one line having negative gadient 
    lcd.drawLine(position_x_map_, position_y_map_, position_x_map_ + triangle_height, position_y_map_ - triangle_height,1); 
    lcd.drawLine(position_x_map_ + triangle_height, position_y_map_ - triangle_height,position_x_map_ + 2*triangle_height,position_y_map_,1);
    position_x_map_ = position_x_map_ + 2*triangle_height,position_y_map_;
}

void Map::draw_line(N5110 &lcd,int line_length){ 
    lcd.drawLine(position_x_map_, position_y_map_, position_x_map_ + line_length, position_y_map_,1);
    position_x_map_ += line_length;
}

void Map::draw_map(N5110 &lcd, int move_map){
    //usb.printf("position_x_map_ = %d\n", position_x_map_);
    //usb.printf("move map = %d\n", move_map);

    reset_position_x_map_to_origonal_ = position_x_map_;
    int map_length_ = 0;
    
    //prints main part of map
    for(int i = 0; i < 11; i++){
        draw_triangle(lcd,rand_heights_[i]);
        draw_line(lcd,rand_lengths_[i]);
        final_random_element_used_ = i;
        map_length_ += rand_lengths_[i] + 2*rand_heights_[i];
        if (map_length_ >252){ // stops random maps lengths being to large only want it about 3 screen widths
            break;
        }
    }
    
    //checks is map need duplicating on forward and backwards loop and fills gap 
    check_duplicates_map_forward(lcd, move_map);
    check_duplicates_map_backwards(lcd, move_map);
    
    position_x_map_ = reset_position_x_map_to_origonal_ + move_map;
    
    // Moves map to different persiton so make it look like its looping 
    if(position_x_map_+ map_length_ < 0){
       position_x_map_ = 0;
    } 
     if(position_x_map_ > 84){
        position_x_map_ = 84 - map_length_;
    }
}

void Map::check_duplicates_map_forward(N5110 &lcd, int move_map){
    // Prints 1st part of map to fill gap wear map isn't present just befor its about to loop round it's self
    if(reset_position_x_map_to_origonal_ + map_length_ <84 ){
        for(int i = 0; i < 4; i++){
            draw_triangle(lcd,rand_heights_[i]);
            draw_line(lcd,rand_lengths_[i]);
        }
    }
    
}

void Map::check_duplicates_map_backwards(N5110 &lcd, int move_map){
    // Prints last part of map to fill gap wear map isn't present just befor its about to loop round it's self
    if(reset_position_x_map_to_origonal_ > 0 ){
        int print_reverse_position = 0;
        // prints last 4 parts of map to fill gap
        for(int i = final_random_element_used_ ; i > final_random_element_used_ - 4; i--){
            position_x_map_ = reset_position_x_map_to_origonal_ - rand_lengths_[i] - print_reverse_position;
            draw_line(lcd,rand_lengths_[i]);
            print_reverse_position += rand_lengths_[i];
            position_x_map_ = reset_position_x_map_to_origonal_ - 2*rand_heights_[i] - print_reverse_position;
            draw_triangle(lcd,rand_heights_[i]);
            print_reverse_position += 2*rand_heights_[i];
        }
    }
}

int Map::get_position_x_map(){
    return position_x_map_;
}