unnamed-platformer/src/collide.c

#include "collide.h"
#include "draw.h"

#define PLAYER_SIDES 11
#define LEVEL_WIDTH 28

char collide(int x, int y, char level[], char tile)
{
	if ((level[(int)(x/16) + (int)(y/16) * LEVEL_WIDTH] == tile) ||
	(level[(int)(x/16) + (int)((y+PLAYER_SIDES)/16) * LEVEL_WIDTH] == tile) ||
	(level[(int)((x+PLAYER_SIDES)/16) + (int)((y+PLAYER_SIDES)/16) *
	LEVEL_WIDTH] == tile) || (level[(int)((x+PLAYER_SIDES)/16) + (int)(y/16) *
	LEVEL_WIDTH] == tile)) return 1;
	return 0;
}

char collide_point(int x, int y, char level[], char tile)
{
	return (level[(int)(x/16) + (int)(y/16) * LEVEL_WIDTH] == tile);
}

char collide_solid(int x, int y, char level[])
{
	return (collide(x, y, level, '0') ||
		collide(x, y, level, '^') ||
		collide(x, y, level, '~') ||
		collide(x, y, level, '#'));
}

char collide_and_erase(int x, int y, char level[], char tile)
{
	char collided = 0;
	if (collide_point(x, y, level, tile))
	{
		erase_tile(x, y, level);
		collided = 1;
	}
	if (collide_point(x + 11, y, level, tile))
	{
		erase_tile(x + 11, y, level);
		collided = 1;
	}
	if (collide_point(x, y + 11, level, tile))
	{
		erase_tile(x, y + 11, level);
		collided = 1;
	}
	if (collide_point(x + 11, y + 11, level, tile))
	{
		erase_tile(x + 11, y + 11, level);
		collided = 1;
	}
	return collided;
}