The reason for drawing the curve is because of wrist movement or elbow movement, and the wrist and elbow become the center of the circle. Then the wrist to the tip of the pen, elbow to the tip of the pen are the radius of a circle, and the drawn line will definitely be round.
Method of drawing a straight line:
The first is to point out two points on the paper now, and then connect them with one key, changing the length and direction to continue practicing.
The second is flat cable, a piece of paper is drawn from top to bottom, from left to right ... in short, it changes back and forth.
The third is arc. Draw a few circles in the square, and the lines should be evenly spaced.
Don't use a ruler at the beginning of sketch, which will not only produce dependence, but also make people feel stiff when drawing lines.
However, in painting design, ruler is essential, and in some places in the later sketch, ruler can also be used to save trouble.
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