tank.c

#include <vram.h>
#include <screen.h>
#include "tank.h"
#include "controller.h"
#include "patterns.h"
#include "levels.h"

void tank_draw(const tank_t * const p){
    OBM[p->object].x = ( p->xp );
    OBM[p->object].y = ( p->yp );
    OBM[p->object].color = p->color;
    OBM[p->object].pattern_config = p->pmfa;
}

// Tank Movement Logic
void tank_advance(tank_t * const p){
    uint8_t controller_value;
    //Setting Player to Controller
    if (p->player == 1) controller_value = CONTROLLER_1;
    if (p->player == 2) controller_value = CONTROLLER_2;

    if(controller_value & CONTROLLER_UP_MASK){
        p->yp -= tank_speed;
        if(controller_value & CONTROLLER_RIGHT_MASK){
            p->xp += tank_speed;
            p->pmfa = pmfa_tank_upright;
        }else if(controller_value & CONTROLLER_LEFT_MASK){
            p->xp -= tank_speed;
            p->pmfa = pmfa_tank_upright | HFLIP_MASK;
        }else{
            p->pmfa = pmfa_tank_up;
        }
    }
    else if(controller_value & CONTROLLER_DOWN_MASK){
        p->yp += tank_speed;
        if(controller_value & CONTROLLER_RIGHT_MASK){
            p->xp += tank_speed;
            p->pmfa = pmfa_tank_upright | VFLIP_MASK;
        }else if(controller_value & CONTROLLER_LEFT_MASK){
            p->xp -= tank_speed;
            p->pmfa = pmfa_tank_upright | VFLIP_MASK | HFLIP_MASK;
        }else{
            p->pmfa = pmfa_tank_up | VFLIP_MASK;
        }
    }
    else if(controller_value & CONTROLLER_LEFT_MASK){
        p->xp -= tank_speed;
        p->pmfa = pmfa_tank_right | HFLIP_MASK;
    }
    else if(controller_value & CONTROLLER_RIGHT_MASK){
        p->xp += tank_speed;
        p->pmfa = pmfa_tank_right;
    }
}

void collision_detection(tank_t * const p, const level_t * const map){
    const uint8_t t_width = 0;
    const uint8_t t_height = 0;
    // Border Detection
    if (p->xp + t_width > 128){p->xp = 128 - t_width;}
    if (p->xp < 0){p->xp = 0;}
    if (p->yp + t_height > 128){p->yp = 128 - t_height;}
    if (p->yp < 0){p->yp = 0;}

    // Map Collision Detection
    if (map[p->xp][p->yp]){
        p->xp = p->xp - p->xv;
        p->yp = p->yp - p->yv;
    }

}