#include "voxel.h"

void face_to_vec(Face face, ivec3 out)
{
	glm_ivec3_zero(out);

	switch (face) {
	case POS_X:
		out[0] = 1;
		break;
	case NEG_X:
		out[0] = -1;
		break;
	case POS_Y:
		out[1] = 1;
		break;
	case NEG_Y:
		out[1] = -1;
		break;
	case POS_Z:
		out[2] = 1;
		break;
	case NEG_Z:
		out[2] = -1;
		break;
	}
}

Face face_opposite(Face face)
{
	switch (face) {
	case POS_X:
		return NEG_X;
	case NEG_X:
		return POS_X;
	case POS_Y:
		return NEG_Y;
	case NEG_Y:
		return POS_Y;
	case POS_Z:
		return NEG_Z;
	case NEG_Z:
		return POS_Z;
	}

	return 0;
}

void face_perpendicular(Face face, Face out[2])
{
	switch (face) {
	case POS_X:
		out[0] = NEG_Z;
		out[1] = NEG_Y;
		break;
	case NEG_X:
		out[0] = POS_Y;
		out[1] = POS_Z;
		break;
	case POS_Y:
		out[0] = NEG_X;
		out[1] = NEG_Z;
		break;
	case NEG_Y:
		out[0] = POS_Z;
		out[1] = POS_X;
		break;
	case POS_Z:
		out[0] = NEG_Y;
		out[1] = NEG_X;
		break;
	case NEG_Z:
		out[0] = POS_X;
		out[1] = POS_Y;
		break;
	}
}