calculations.c

#include <3ds.h>
#include <config.h>
#include <initvariables.h>
#include <sprites.h>
#include <draw.h>
#include <stdio.h>
#include <text.h>

struct bullet{
    int x;
    int y;
    int exist;
    int type;
};

struct tank{
    int x;
    int alive;
    int shotsfired;
    struct bullet shots[100];
};

char read_bit(char var_byte,char position){
return var_byte & 1 << position;
};

int get_text_fullsize(){
return font_width + font_spacing;
};

int get_draw_start_x(alien_array_position){
    if (draw_start_x[alien_layout[alien_array_position]] !=0){
        return draw_start_x[alien_layout[alien_array_position]];
    }
    else{
        int Remainder = screen_top_width % (invader_layout_width * entity_width[alien_Large_arraypos]);
        Remainder /= 2;
        return Remainder;
    }
    return 0;
};

int get_draw_start_y(alien_array_position){
    return invader_start_height[alien_layout[alien_array_position]];
};

int get_alien_collision(struct bullet *bulletStruct,int anim){
    int i = 0;
    int x = 0;
    int y = 0;
    //for(i=0;i<invader_layout_width*invader_layout_height;i++){
    for(i=0;i<20;i++){
        if (alien_layout > 0){
            int alienPPositiony = get_ypos(i);
            sprintf(debuglines[i], "bulletStruct[%d] = %d" ,i,bulletStruct->x);
            int alienPPositionx = get_xpos(i);
            for(x = 0;x<invader_width[alien_layout[i]];x++){
                for(y = 0;y<invader_height[alien_layout[i]];y++){
                    if (read_bit(alien_sprite[alien_layout[i]][anim][y],x) == 0){
                        if ((bulletStruct->x = alienPPositionx + x)&&(bulletStruct->y = alienPPositiony + y)){
                                bulletStruct->x= 0;
                                bulletStruct->y= 0;
                                //alien_layout[i] = 0; //Play Death Animation
                            return 1;
                        }
                    }
                }
            }
        }
    }
return 0;
}