Basic formula for active sketch pattern drawing in upper body tailoring

A method of preparing a pattern drawing of the upper body tailoring by means of the data obtained from the measure of shoulder depth, arm girth, back width, shoulder width, neck base girth, back length, front length, bust depth, breast depth, bust width, bust breadth, chest girth, breast girth and abdominal depth and by obtaining a front side line, which consists of:

• first drawing a horizontal line from a free point (1), setting a point (2) rightward along the horizontal line at an arbitrary distance, drawing a vertical line downward from the point (2) for the front side line, setting a point (3) rightward along the horizontal line (1) from point (2) at a distance equal to 1/4 of the arm girth+ 4 cm, the distance between points (2) and (3) being equal to the width of armhole, drawing a vertical line downward from point (3);
• drawing a horizontal line (4) downward from the point (2) or point (3) at a distance equal to 1/4 of arm girth+ 14 cm for armhole depth;
• setting a back shoulder point (5) downward from point (3) at a distance equal to 1/6 of shoulder width and at 1.3 cm leftward from the vertical line of the point (3);
• setting a front shoulder point (6) downward from point (2) at a distance equal to 4/6 of shoulder width--0.5 cm and at 2.5 cm rightward from the vertical line of the point (2);
• setting a back armpit point point (7) at 2.5 cm upward from the horizontal line (4) along the vertical line from point (3);
• drawing a horizontal line rightward from point (7) for back width and setting a point (8) at a distance equal to one-half of back width, the distance between points (7) and (8) being equal to the back width;
• setting a point (9) rightward along the horizontal line (1) at a distance equal to one-half of the shoulder width from point (5);
• when the shoulder width point (9) is wider than the back width point (8), drawing a vertical line downward from point (9) for the back central line (10), when the back width point is equal to the shoulder width point, drawing a vertical line through points (9) and (8);
• when the back width point (8) is wider than the shoulder width point (9), drawing a vertical line through point (8) for the back central line (10);
• setting a point (11) leftward from the cross point between the horizontal line (1) and the back central line (10) at a distance equal to 1/6 of neck base girth+ 1.3 cm so as to obtain the size for the back collar width;
• setting a point (12) at 2 cm upward vertically from point (11) so as to obtain the size for the depth of back neck point;
• setting a point (13) at 0.5 cm downward from the point (12), drawing an oblique line to connect points (5) and (13);
• drawing a curved line from point (12) of a length of 3 cm to connect with the line between points (5) and (13) at point (14);
• drawing a horizontal line downward from point (12) at a distance equal to the back length as the back waistline (15);
• setting a point (16) along the horizontal line (1) left-upper side from the point (6) at a distance equal to the distance between points (5) and (12) for the front neck point, when the shoulder dart is present, deducting the length of the shoulder dart;
• setting a point (17) for the bust depth downward from point (2) at a distance equal to the bust depth, setting a point (18) for breast depth leftward along a horizontal line from point (17) at a distance equal to the breast depth, when the breast depth protrudes over abdominal depth, drawing a vertical line downward directly from point (18);
• setting a point (19) downwardly directly from point (2) at a distance equal to front length and drawing a horizontal line for the front waist line, thus obtaining the difference between the front waistline (19) and the back waistline (15);
• setting a point (20) leftward along horizontal line (1) from point (16) at a distance equal to the back collar width--0.5 cm for the front collar width;
• setting a bust point (21) rightward along the horizontal line from point (18) at a distance equal to one-half of the bust width;
• placing a triangle with the short side aimed at point (21) in a length equal to the distance between points (18) and (21) and with the longer side aimed at point (20) drawing a rectangular line by both sides of the triangle to cross at the peak point (22), thus obtaining the expansion of the central bust dart between points (18) and (22);
• drawing a vertical line upward from point (6) to obtain a cross point (6.sup.1) with the horizontal line (1);
• setting a point (24) from point (16) along the extension line through points (23) and (16) at a distance equal to the size between points (16) and (6.sup.1);
• applying a triangle with the long side aimed at the connecting line between points (16) and (24), setting a point (25) along the short side of the triangle from point (24) at a distance equal to the distance between points (6.sup.1) and (6) as a moved shoulder point;
• drawing a line to connect points (16) and (25);
• drawing a horizontal line below the horizontal armhole line (4) at a distance equal to the depth between points (1) and (24) so as to obtain a cross point (26) with the vertical front side line (2) for adjustment of the armpit line;
• setting a front armpit point (27) at 2.5 cm upward along the vertical line from point (26);
• applying a triangle with the long side aimed at the connecting line between points (20) and (22) and with the short side passing through point (27) so as to obtain a peak point (28);
• applying a triangle with the longer side aimed at the connecting line between points (20) and (28) and with the short side passing through neck point (16) to obtain a cross point (23) to form an adjusted front shoulder line;
• drawing a line to connect points (27) and (28) for the bust breast line, setting a point (29) rightward from point (28) along the bust breast line at a distance equal to 1/2 of the bust breast;
• setting a point (30) along the horizontal line (4) from the vertical line (2) at a distance equal to 1/2 of the armhole width and draw a vertical line downward from the point (30), setting a point (31) leftward from the point (26) at a distance equal to the distance between points (27) and (29);
• drawing a vertical line to temporarily separate front and back side line;
• setting a point (32) for the depth of front collar opening downward from point (23) along the connecting line between points (23) and (22) at a distance equal to 2 cm+ the length between points (16) and (23);
• drawing a line to connect points (5), (14) and (12) for the back shoulder width, to draw a curved line from point (12) to cut with the horizontal line (1) and to extend to the back central line (10), for the collar opening;
• drawing a curved line from point (5) to cut with vertical lines (3), (7) and horizontal line (4), up to the point (30) for the back armhole, combining with the back central line (10), vertical side line (30) and back waistline (15) to form a basic pattern for the back part of the upper body;
• connecting points (16) and (25) for the front shoulder length, drawing a curved line to connect points (16) and (32) for the collar opening, drawing a curved line from point (25) through point (29) to cut with the horizontal line (31) for the front armhole;
• drawing a straight line to connect points (32) and (22), a straight line to connect points (22) and (21), a straight line to connect points (21) and (18) so as to leave a blank space between points (18) and (22) for bust dart, from the front central line (18) downward from the side vertical line (31) downward and the front waistline (19) to form a basic pattern for the front part of the upper body, then combining the front part pattern and the back part pattern at respective side line point (30) and (31) along the vertical lines to complete the pattern for the upper body.