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pacman.c
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pacman.c
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/*Pacman movement utilities*/
#include "game.h"
#include "pacman_sprite.h"
pacman* init_pacman(void) {
pacman *pacman_ptr = (pacman *) malloc(sizeof(pacman));
vector vec;
vec.x = 0;
vec.y = 0;
pacman_ptr->vec = vec;
pacman_ptr->prev_vec = vec;
pacman_ptr->x = 112;
pacman_ptr->y = 188;
pacman_ptr->temp_x = pacman_ptr->x;
pacman_ptr->temp_y = pacman_ptr->y;
pacman_ptr->speed = 0.8;
pacman_ptr->animation_state = 1;
pacman_ptr->dots = 0;
pacman_ptr->pacman_sprite = (Sprite *) malloc(sizeof(Sprite));
pacman_ptr->pacman_sprite->bitmap = pacman_closed;
pacman_ptr->pacman_sprite->width = PACMAN_SIZE;
pacman_ptr->pacman_sprite->height = PACMAN_SIZE;
return pacman_ptr;
}
void get_pacman_board_coord(pacman *pacman_ptr, int *bx, int *by) {
int x = pacman_ptr->x;
int y = pacman_ptr->y;
*bx = x / 8;
*by = y / 8;
}
void is_valid_vector(uint8_t *board, pacman *pacman_ptr) {
int vx = pacman_ptr->vec.x;
int vy = pacman_ptr->vec.y;
int cx = 0;
int cy = 0;
get_pacman_board_coord(pacman_ptr, &cx, &cy);
if(vx == 1) {
if(get_board_value(cx + 1, cy, board) == WALL) {
if(pacman_ptr->prev_vec.x > 0) {
pacman_ptr->vec.x = 0;
} else {
pacman_ptr->vec = pacman_ptr->prev_vec;
}
}
} else if(vx == -1) {
if(get_board_value(cx - 1, cy, board) == WALL) {
if(pacman_ptr->prev_vec.x < 0) {
pacman_ptr->vec.x = 0;
} else {
pacman_ptr->vec = pacman_ptr->prev_vec;
}
}
} else if(vy == 1) {
if(get_board_value(cx, cy + 1, board) == WALL) {
if(pacman_ptr->prev_vec.y > 0) {
pacman_ptr->vec.y = 0;
} else {
pacman_ptr->vec = pacman_ptr->prev_vec;
}
}
} else if(vy == -1) {
if(get_board_value(cx, cy - 1, board) == WALL) {
if(pacman_ptr->prev_vec.y < 0) {
pacman_ptr->vec.y = 0;
} else {
pacman_ptr->vec = pacman_ptr->prev_vec;
}
}
}
}
void pacman_animation_right(pacman *pacman_ptr){
int animation = pacman_ptr->animation_state;
pacman_ptr->animation_state = (animation + 1) % 3;
switch(animation) {
case 0:
pacman_ptr->pacman_sprite->bitmap = pacman_closed;
break;
case 1:
pacman_ptr->pacman_sprite->bitmap = pacman_right_open1;
break;
case 2:
pacman_ptr->pacman_sprite->bitmap = pacman_right_open2;
break;
}
}
void pacman_animation_left(pacman *pacman_ptr){
int animation = pacman_ptr->animation_state;
pacman_ptr->animation_state = (animation + 1) % 3;
switch(animation) {
case 0:
pacman_ptr->pacman_sprite->bitmap = pacman_closed;
break;
case 1:
pacman_ptr->pacman_sprite->bitmap = pacman_left_open1;
break;
case 2:
pacman_ptr->pacman_sprite->bitmap = pacman_left_open2;
break;
}
}
void pacman_animation_down(pacman *pacman_ptr){
int animation = pacman_ptr->animation_state;
pacman_ptr->animation_state = (animation + 1) % 3;
switch(animation) {
case 0:
pacman_ptr->pacman_sprite->bitmap = pacman_closed;
break;
case 1:
pacman_ptr->pacman_sprite->bitmap = pacman_down_open1;
break;
case 2:
pacman_ptr->pacman_sprite->bitmap = pacman_down_open2;
break;
}
}
void pacman_animation_up(pacman *pacman_ptr){
int animation = pacman_ptr->animation_state;
pacman_ptr->animation_state = (animation + 1) % 3;
switch(animation) {
case 0:
pacman_ptr->pacman_sprite->bitmap = pacman_closed;
break;
case 1:
pacman_ptr->pacman_sprite->bitmap = pacman_up_open1;
break;
case 2:
pacman_ptr->pacman_sprite->bitmap = pacman_up_open2;
break;
}
}
void change_pacman_animation(pacman *pacman_ptr) {
int vx = pacman_ptr->vec.x;
int vy = pacman_ptr->vec.y;
if(vx == 1) {
pacman_animation_right(pacman_ptr);
}
if(vx == -1) {
pacman_animation_left(pacman_ptr);
}
if(vy == -1) {
pacman_animation_up(pacman_ptr);
}
if(vy == 1) {
pacman_animation_down(pacman_ptr);
}
}
void control_pacman_speed(pacman *pacman_ptr) {
pacman_ptr->temp_x += pacman_ptr->speed * pacman_ptr->vec.x * BASE_SPEED;
pacman_ptr->temp_y += pacman_ptr->speed * pacman_ptr->vec.y * BASE_SPEED;
pacman_ptr->x = (int) (pacman_ptr->temp_x);
pacman_ptr->y = (int) (pacman_ptr->temp_y);
if(pacman_ptr->vec.y) {
pacman_ptr->x = ((pacman_ptr->x >> 3) << 3) + 3;
pacman_ptr->temp_x = pacman_ptr->x;
} if(pacman_ptr->vec.x) {
pacman_ptr->y = ((pacman_ptr->y >> 3) << 3) + 3;
pacman_ptr->temp_y = pacman_ptr->y;
}
}