Gaining intuition from a contour map You can tell how steep a portion of your graph is by how close the contour lines are to one another. An isobar is a line on a contour map representing pressure. An isotherm is a line on a contour map for a function representing temperature. You are training your mind and hand to work together. Here are two common examples from weather maps. Remember, this is an exercise, so it doesn't matter what the final result looks like. A flowing line that isn't perfect is better than many perfectly placed but tentative lines. The purpose of this technique is to provide overall parameter around. All you are interested in is the shape of the wire. A drawing technique where an object drawing is broken down in simple geometric shapes.
You can also use line weight to create a sense of depth, by pressing harder to get a stronger line as the wire comes toward you. Your drawing can be completely flat, with no perspective. Often, in more complex forms, cross-contours will be drawn at varying angles. Cross contours may be horizontal or vertical, as on the right side of the example, or both. Turn the wire around and look at it from different angles, then decide which one you want to draw.ĭon't try to make your drawing look realistic. Cross contour lines are drawn lines which travel, as the name suggests, across the form. Include spirals, odd curves, and irregular squiggles. You will need about 15 to 30 minutes, a piece of wire-such as an old coat hanger-and pliers, sketch paper, and a pen or pencil.įirst, bend the wire into any random, three-dimensional shape you like. The exercise also teaches hand-eye coordination. Instead, this is a simple practice in following a line in space and drawing it on paper. There is no pressure of having to make it look like something. In drawing, a cross contour is a line that runs across the form of a shape, something like the contours on a map.
Creating abstract shapes with a simple piece of wire is a great exercise for beginners of all ages.
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