Ve qua dia cau

Hinh 1

Buoc 1

- Chon cong cu ve hinh tron (Ellipse Tool), ve hinh tron co duong kinh la 10 cm bang cach nhan Ctrl + click chuot trai va keo cheo.

- Tren thanh thuoc tinh o o Object(s) Size go so 10 cm, o o Nonproportional Scaling/Sizing Ratio chon bieu tuong hinh o khoa (dang khoa).

Buoc 2: Ve cac kinh tuyen va vi tuyen

- Chon hinh tron.

- Chon Object - Transformations - Position:
Relative Position: chon o o ngay chinh giua
Nhan the Apply To Duplicate.

- Chon hinh tron moi tao, nhan Shift + Click chuot trai o hang thu hai (ben phai hoac trai

- Chon hinh Ellipse.

- Chon Object - Transformations - Position:
Relative Position: chon o o ngay chinh giua
Nhan the Apply To Duplicate.

- Chon hinh Ellipse moi tao, nhan Shift + Click chuot trai o hang thu hai (ben phai hoac trai deu duoc) roi keo vo trong. Ta duoc mot hinh Ellipse moi nho hon.

- Tuong tu buoc tren ta tao them hai hinh Ellipse nua sao cho khoang cach giua cac hinh Ellipse deu nhau. Den day ta da co cac duong kinh tuyen (hinh 2).

- Chon cong cu ve duong thang (Bezier Tool), ve mot duong thang dai 10 cm theo chieu ngang.

- Canh nam chinh giua cac hinh tron va Ellipse, ta co duoc duong xich dao.

- Chon duong xich dao.

- Chon Object - Transformations - Position:
Relative Position: chon o o ngay chinh giua
Nhan the Apply To Duplicate.

- Chon cong cu Shape Tool, dieu chinh hai dau cua duong thang nam tren hinh tron.

- Click vao duong thang, tren thanh thuoc tinh chon Convert Line To Curve, click chuot trai vao giua duong thang, keo xuong mot chut ta co duoc mot duong cong (hinh 3).

- Tuong tu buoc tren ta ve them 3 duong cong nua roi group tat ca cac duong cong nay lai (hinh 4).

- Chon Object - Transformations - Position:
Relative Position: chon o o ngay chinh giua
Nhan the Apply To Duplicate.

- Tren thanh thuoc tinh chon Mirror Buttons de lat lai va di chuyen xuong ben duoi duong xich dao (hinh 5).

Buoc 3: Ve mat dia cau

- Chon cong cu ve duong (Bezier Tool), ve cac phan dat. Chon hinh tron dau tien to mau xanh nhat, cac duong kinh tuyen, vi tuyen to mau trang, phan dat mau xanh (hinh 6).

Buoc 4: Truc va de

- Ve hinh tron co duong kinh la 11 cm, cat doi theo chieu doc.
- Chon Object - Transformations - Position:
Relative Position: chon o o ngay chinh giua
Nhan the Apply To Duplicate.

- Chon nua hinh tron moi tao, keo nho mot chut. Chon ca hai nua hinh tron nhan Ctrl + L. Group tat ca lai roi xoay ve ben phai 15 do (hinh 7, 8).

- Chon cong cu ve duong (Bezier Tool), ve phan de va truc. To mau den, ta duoc ket qua nhu hinh 9.

L.K