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#include "snake_utils.h"
bool snake_blocks_hit(int tile_size, SnakeBlock b1, SnakeBlock b2) {
return b1.x + tile_size >= b2.x
&& b1.x <= b2.x + tile_size
&& b1.y + tile_size >= b2.y
&& b1.y <= b2.y + tile_size;
}
bool snake_block_eat_snack(int tile_size, const Fl_Group * snake_map, SnakeBlock snake_block, SnakeSnack snack) {
// Get snack x and y pixel locations.
int snack_x, snack_y;
snack_x = (snack.x * tile_size) + snake_map->x();
snack_y = (snack.y * tile_size) + snake_map->y();
return snake_block.x + tile_size >= snack_x
&& snake_block.x <= snack_x + tile_size
&& snake_block.y + tile_size >= snack_y
&& snake_block.y <= snack_y + tile_size;
}
int put_snake_blocks_side_by_side(int tile_size, SnakeBlock * b1, SnakeBlock b2) {
if (b1 == NULL)
return -1;
if (b1->current_direction != b2.current_direction)
return -1;
switch (b1->current_direction) {
case SNAKE_STILL:
break;
case SNAKE_RIGHT:
b1->x = b2.x - tile_size;
b1->y = b2.y;
break;
case SNAKE_LEFT:
b1->x = b2.x + tile_size;
b1->y = b2.y;
break;
case SNAKE_UP:
b1->x = b2.x;
b1->y = b2.y + tile_size;
break;
case SNAKE_DOWN:
b1->x = b2.x;
b1->y = b2.y - tile_size;
break;
default:
break;
}
return 0;
}
int random_range(int x, int y) {
std::random_device rd;
std::mt19937 gen(rd());
std::uniform_int_distribution<> distr(x, y);
return distr(gen);
}
void draw_snake_block(MainData * mdata, SnakeBlock snake_block) {
Fl_Color draw_color;
switch (snake_block.part) {
case SNAKE_HEAD:
draw_color = FL_BLACK;
break;
case SNAKE_BODY:
draw_color = FL_YELLOW;
break;
case SNAKE_TAIL:
draw_color = FL_BLUE;
break;
default:
break;
}
fl_rectf(snake_block.x, snake_block.y, mdata->settings.tile_size, mdata->settings.tile_size, draw_color);
}
void draw_snake(MainData * mdata, std::vector<SnakeBlock> snake_blocks) {
for (auto b : snake_blocks)
draw_snake_block(mdata, b);
}
void draw_snack(MainData * mdata, const Fl_Group * snake_map, SnakeSnack snack) {
Fl_PNG_Image * draw_image;
int draw_x, draw_y;
draw_image = mdata->images.snack_images_tile_size[snack.type];
draw_x = (snack.x * mdata->settings.tile_size) + snake_map->x();
draw_y = (snack.y * mdata->settings.tile_size) + snake_map->y();
if (draw_image->fail()) {
fl_rectf(
draw_x,
draw_y,
mdata->settings.tile_size,
mdata->settings.tile_size,
0x0
);
return;
}
draw_image->draw(draw_x, draw_y);
}
int str_to_int(const char * str, size_t n, int * int_value) {
int i;
int cvalue;
int value_muliplier = 1;
int res_value = 0;
int neg = 1; // -1 for negative and 1 for whole.
size_t str_len; // String length.
int end_at = 0; // Where loop should end.
if (str == NULL || int_value == NULL || n <= 0)
return -1;
// Get string length
str_len = strnlen(str, n);
if (str_len <= 0)
return -1;
// Is negative.
if (str[0] == '-') {
neg = -1;
end_at = 1; // If negative 0 item in 'str' is skipped.
}
// Do the math.
for (i = str_len - 1; i >= end_at; i--) {
cvalue = char_to_int(str[i]);
// Character not a number.
if (cvalue == -1)
return -1;
// Do the same math that is down below.
res_value += cvalue * value_muliplier;
value_muliplier *= 10;
}
/*
* "436"
* res_value = (6 * 1) + (3 * 10) + (4 * 100)
*/
*int_value = (res_value * neg);
return 0;
}
int char_to_int(char c) {
int cvalue = (int)c;
// Not a number.
// 48 to 57 is 0 to 9 in ascii.
if (cvalue < 48 || cvalue > 57)
return -1;
return cvalue - 48; // 48 is the value of zero in ascii.
}
void set_snack_images_to_tile_size(MainData * mdata) {
mdata->images.snack_images_tile_size.clear();
for (auto img : mdata->images.snack_images)
mdata->images.snack_images_tile_size.push_back(
(Fl_PNG_Image*)img->copy(mdata->settings.tile_size, mdata->settings.tile_size)
);
}
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