Sleeve Block, McCunn System: Difference between revisions
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===[[Formulas_McCunn_Sleeve|Formulas]]=== <!--T:3-->
The '''Draw Mode''' of Valentina is used to create the formula based drawing in support of the sleeve pattern. Further instructions on creating
'''Figure 1''' presents the same information as a drawing from the book that describes the method. This picture shows the basic reference lines and other major lines used in constructing the main portion of the sleeve.
[[File:Mccunn-sleeve-construction.jpg|left|thumb|'''Figure 1 - Arm Portion''']]
The McCunn method uses two reference lines. The '''Sleeve Centerline''' is drawn as a vertical line with length equal to the Valentina measurement '''arm_shoulder_tip_to_wrist_bent'''.<br> <br>
The '''Biceps Line''' is drawn at a right angle to the Sleeve Centerline with half of the length of the Valentina measurement '''arm_upper_circ''' plus wearing ease extending on each side from the center. Wearing ease is defined in the book as a fixed number (1.5" in each half of the line for a total of 3"). This line is drawn at a distance of '''arm_shoulder_tip_to_armfold_line''' from the top of the Sleeve Centerline.<br> <br>
''One strength of using a formula based tool, such as Valentina to create a pattern is that the pattern may be generated based on individual measurements. The intent of this particular pattern is to be scalable from doll sized through the entire range of different sizes of potential human wearers. To facilitate the pattern created in Valentina in being scalable, the wearing ease will be calculated as 20% of the arm_upper_circ. For example, a person with a measurement of 15" at the bicep would have a sleeve drawn by this method with 3" wearing ease.'' <br> <br>
The '''Wrist Line''' is drawn at a right angle to the Sleeve Centerline with half of the length of the Valentina measurement '''hand_palm_circ''' extending on each side from the center. This line is drawn at the wrist end of the Sleeve Centerline. By using the palm circumference instead of the wrist circumference, we will ensure that the sleeve opening is large enough for the
'''Figure 1-V''' shows the same drawing as '''Figure 1''', but shows the image as it will be presented in the valentina program after you have finished the first half of the
[[File:Mccunn-sleeve-fig-1-13.jpg|left|thumb|700x700px|'''Figure 1-V - Represents Valentina Drawing of Arm Portion''']]<br> <br> <br> <br> <br> <br>
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