godot_voxel/voxel.cpp

#include "voxel.h"
#include "voxel_library.h"
#include "voxel_mesher.h"

Voxel::Voxel() : Reference(),
	_id(-1),
	_material_id(0),
	_is_transparent(false),
	_library(NULL),
	_color(1.f, 1.f, 1.f)
{}

Ref<Voxel> Voxel::set_name(String name) {
	_name = name;
	return Ref<Voxel>(this);
}

Ref<Voxel> Voxel::set_id(int id) {
	ERR_FAIL_COND_V(id < 0 || id >= 256, Ref<Voxel>(this));
	// Cannot modify ID after creation
	ERR_FAIL_COND_V(_id != -1, Ref<Voxel>(this));
	_id = id;
	return Ref<Voxel>(this);
}

Ref<Voxel> Voxel::set_color(Color color) {
	_color = color;
	return Ref<Voxel>(this);
}

Ref<Voxel> Voxel::set_material_id(unsigned int id) {
	ERR_FAIL_COND_V(id >= VoxelMesher::MAX_MATERIALS, Ref<Voxel>(this));
	_material_id = id;
	return Ref<Voxel>(this);
}

Ref<Voxel> Voxel::set_transparent(bool t) {
	_is_transparent = t;
	return Ref<Voxel>(this);
}

Ref<Voxel> Voxel::set_cube_geometry(float sy) {
	const Vector3 vertices[SIDE_COUNT][6] = {
		{
			// LEFT
			Vector3(0, 0, 0),
			Vector3(0, sy, 0),
			Vector3(0, sy, 1),
			Vector3(0, 0, 0),
			Vector3(0, sy, 1),
			Vector3(0, 0, 1),
		},
		{
			// RIGHT
			Vector3(1, 0, 0),
			Vector3(1, sy, 1),
			Vector3(1, sy, 0),
			Vector3(1, 0, 0),
			Vector3(1, 0, 1),
			Vector3(1, sy, 1)
		},
		{
			// BOTTOM
			Vector3(0, 0, 0),
			Vector3(1, 0, 1),
			Vector3(1, 0, 0),
			Vector3(0, 0, 0),
			Vector3(0, 0, 1),
			Vector3(1, 0, 1)
		},
		{
			// TOP
			Vector3(0, sy, 0),
			Vector3(1, sy, 0),
			Vector3(1, sy, 1),
			Vector3(0, sy, 0),
			Vector3(1, sy, 1),
			Vector3(0, sy, 1)
		},
		{
			// BACK
			Vector3(0, 0, 0),
			Vector3(1, 0, 0),
			Vector3(1, sy, 0),
			Vector3(0, 0, 0),
			Vector3(1, sy, 0),
			Vector3(0, sy, 0),
		},
		{
			// FRONT
			Vector3(1, 0, 1),
			Vector3(0, 0, 1),
			Vector3(1, sy, 1),
			Vector3(0, 0, 1),
			Vector3(0, sy, 1),
			Vector3(1, sy, 1)
		}
	};

	for (unsigned int side = 0; side < SIDE_COUNT; ++side) {
		_model_side_vertices[side].resize(6);
		DVector<Vector3>::Write w = _model_side_vertices[side].write();
		for (unsigned int i = 0; i < 6; ++i) {
			w[i] = vertices[side][i];
		}
	}

	return Ref<Voxel>(this);
}

Ref<Voxel> Voxel::_set_cube_uv_sides(const Vector2 atlas_pos[6]) {
	ERR_FAIL_COND_V(_library == NULL, Ref<Voxel>());

	float e = 0.001;
	const Vector2 uv[4] = {
		Vector2(e, e),
		Vector2(1.f - e, e),
		Vector2(e, 1.f - e),
		Vector2(1.f - e, 1.f - e),
	};

	const int uv6[SIDE_COUNT][6] = {
		// LEFT
		{ 2,0,1,2,1,3 },
		// RIGHT
		{ 2,1,0,2,3,1 },
		// BOTTOM
		{ 0,3,1,0,2,3 },
		// TOP
		{ 0,1,3,0,3,2 },
		// BACK
		{ 2,3,1,2,1,0 },
		// FRONT
		{ 3,2,1,2,0,1 }
	};

	float s = 1.0 / (float)_library->get_atlas_size();

	for (unsigned int side = 0; side < SIDE_COUNT; ++side) {
		_model_side_uv[side].resize(6);
		DVector<Vector2>::Write w = _model_side_uv[side].write();
		for (unsigned int i = 0; i < 6; ++i) {
			w[i] = (atlas_pos[side] + uv[uv6[side][i]]) * s;
		}
	}

	return Ref<Voxel>(this);
}

Ref<Voxel> Voxel::set_cube_uv_all_sides(Vector2 atlas_pos) {
	const Vector2 positions[6] = {
		atlas_pos,
		atlas_pos,
		atlas_pos,
		atlas_pos,
		atlas_pos,
		atlas_pos
	};
	return _set_cube_uv_sides(positions);
}

Ref<Voxel> Voxel::set_cube_uv_tbs_sides(Vector2 top_atlas_pos, Vector2 side_atlas_pos, Vector2 bottom_atlas_pos) {
	const Vector2 positions[6] = {
		side_atlas_pos,
		side_atlas_pos,
		bottom_atlas_pos,
		top_atlas_pos,
		side_atlas_pos,
		side_atlas_pos,
	};
	return _set_cube_uv_sides(positions);
}

//Ref<Voxel> Voxel::set_xquad_geometry(Vector2 atlas_pos) {
//    // TODO
//    return Ref<Voxel>(this);
//}

void Voxel::_bind_methods() {

	ObjectTypeDB::bind_method(_MD("set_name:Voxel", "name"), &Voxel::set_name);
	ObjectTypeDB::bind_method(_MD("get_name"), &Voxel::get_name);

	ObjectTypeDB::bind_method(_MD("set_id:Voxel", "id"), &Voxel::set_id);
	ObjectTypeDB::bind_method(_MD("get_id"), &Voxel::get_id);

	ObjectTypeDB::bind_method(_MD("set_color:Voxel", "color"), &Voxel::set_color);
	ObjectTypeDB::bind_method(_MD("get_color"), &Voxel::get_color);

	ObjectTypeDB::bind_method(_MD("set_transparent:Voxel", "color"), &Voxel::set_transparent, DEFVAL(true));
	ObjectTypeDB::bind_method(_MD("is_transparent"), &Voxel::is_transparent);

	ObjectTypeDB::bind_method(_MD("set_material_id", "id"), &Voxel::set_material_id);
	ObjectTypeDB::bind_method(_MD("get_material_id"), &Voxel::get_material_id);

	ObjectTypeDB::bind_method(_MD("set_cube_geometry:Voxel", "height"), &Voxel::set_cube_geometry, DEFVAL(1.f));
	ObjectTypeDB::bind_method(_MD("set_cube_uv_all_sides:Voxel", "atlas_pos"), &Voxel::set_cube_uv_all_sides);
	ObjectTypeDB::bind_method(_MD("set_cube_uv_tbs_sides:Voxel", "top_atlas_pos", "side_atlas_pos", "bottom_atlas_pos"), &Voxel::set_cube_uv_tbs_sides);

}