I used cross contour lines to indicate the form of the shapes including the base they are on. Step 1 – accept the possibility of failure. In addition to indicating space, this style provides a sense of volume and thus gives the viewer more information on the shape of the subject being drawn. You don’t need all that if you have accepted that the drawing could fail. The lessons extension task is to draw their own hand from observation using cross-hatching to achieve a realistic appearance. Understanding the fundamentals of drawing with ink helps you greatly because any complex texture consists of the basic, very simple elements. And it's totally easy to learn! When lines are placed at an angle to one another, it is called cross-hatching. Cross Contour Drawing : What is Cross Contour Drawing? Continuous Line Drawing. Outline. It consists of rows of parallel lines placed closely together. Notice that some hatch marks are closer together, such as along the top of the index finger. 2. . Contour and cross-contour hatching. Drawing is a form of visual art in which one uses various drawing instruments to mark paper or another two-dimensional medium. Practice this by drawing a series of hatching lines on a piece of scrap paper. Hatching is the simplest and easiest. Practice this by drawing a series of hatching lines on a piece of scrap paper. Add a second set of smaller lines from the larger edge toward the smaller. Drawing Techniques. Contour and cross-contour hatching. With Chris’ minimalist style, he can just leave out the parts of the pose that aren’t interesting entirely. tips and techniques for drawing: contour, cross-contour, cross-hatching, 3D contour, and implied lines. Anywhere you put hatching in a drawing, that area will appear darker or in shadow, and anywhere you don’t will appear as a highlight. One of his finest examples is of a male figure from behind. Sep 7, 2020 - Explore Frank Hobbs: OWU Fine Arts's board "Drawing: Contour-hatching", followed by 709 people on Pinterest. Explain how to build up the lines and values to create form and depth in the drawing of the dragon. There are many options for shading and each option will change the style of your drawing. You may create a mixed materials drawing using variety of types of charcoal including white charcoal pencil or white conté crayon to create a range of value. If you haven’t seen the articles, I recommend that you check them out. Rather than simple parallel lines, contour hatching is when the lines follow the contours of the subject. hatches List[str], optional. Hatching is supported in the PostScript, PDF, SVG and Agg backends only. Only applies to contourf. hatches: List[str], optional. Failure is not the end, but rather a valuable step in the journey of the artist. ... Hatching which follows a contour can also help to make objects appear more 3D. Parallel hatching is one of the most basic forms of hatching, and a very effective way of demonstrating lightness and darkness. Dotwork, or stippling If those are right, it’ll look good. Cross contour uses line to map the curved surface of depicted forms in a drawing, but instead of dealing with the profile of the form, it moves within the outer boundaries and maps the surface facing the viewer. When you do a cross-hatching drawing, do you make all the lines using cross-hatching or is that just for shading? This lesson pack contains a PowerPoint, two activity worksheets and an extension task. Demonstrate how to create a value scale using hatching and cross hatching. Train Your Brain: Powerful Gesture Drawing Exercise, 5 Steps to Simplify Values, demonstrated by drawing complex hair, How to find the perfect drawing tool for you. Hatching and cross-hatching. Just go for it, directly with pen, and see what happens. Instruments include graphite pencils, pen and ink, various kinds of paints, inked brushes, colored pencils, crayons, charcoal, chalk, pastels, various kinds of erasers, markers, styluses, and various metals (such as silverpoint). It is possible to do hatching of regions using contourf function in matplotlib. Here are some of the basic ones, you can try them on a simple sphere design as a fun exercise. 2. See more ideas about Drawings, Art, Life drawing. Just draw a series of short parallel lines in a row within the shape you want to shade. Cross contour lines are drawn lines which travel, as the name suggests, across the form. positive and negative space. If None, no hatching will be added to the contour. The major techniques used in shading is Cross hatching, smooth pencil shading, Stippling pencil shading, Slinky pencil shading, Circulism pencil shading and Contour Shading. These techniques use simple lines in various arrangements and densities to create a solid sense of atmospheric perspective and contour. However this is a well-known style due to works of such artists as Albrecht Dürer, Gustave Doré, John Tenniel, Rembrandt, Leonardo da Vinci. Hatching and cross-hatching. Rather than simple parallel lines, contour hatching is when the lines follow the contours of the subject. So he often uses a thick, uniform line around the whole figure. A lot of the drawings are 10 to 20 minutes, with some quicker ones thrown in too. Chris keeps things fairly flat and clean, with crisp edges. levels: int or array-like, optional. … Here, the hatch marks go along the curves of the hand. If it goes well, rejoice. The height values over which the contour is drawn. Line can be used to show shape, contour, texture & tone. They should be those that tell you only the most important things about the most important shapes in the pose. Hatching We can create value by using linear hatching. Crosshatching Hatching (hachure in French) is an artistic technique used to create tonal or shading effects by drawing (or painting or scribing) closely spaced parallel lines. With contour hatching, your lines should follow the contour of the outline you’re shading. He draws contour lines that describe the big shapes in the figure. In this class, you'll learn this essential technique for rendering volume and light while creating four portraits in four different mediums – graphite, ink + watercolor, colored pencil, gouache – with Portland-based portrait artist Mike Creighton. But he doesn’t work around them, instead he leans into his material’s characteristics, and that’s where his drawings become so fun. Contour hatching. Enter: hatching. There are many options for shading and each option will change the style of your drawing. Expressive lines, contours. That’s the only way to get the freshness of line that he achieves. Contour Hatching: one of the six drawing techniques similar to hatching, except that the lines follow the shape of the drawing such as using curved lines when shadowing a sphere. Contour line drawing involves only drawing the outline of an object, without any shading. 8th Grade Painting Since the shading is all at one level, It’s not going to be gently transitioning from dark to light. Cross hatching lines can also wrap around the contours. It is possible to add rounded lines to create an illusion of volume. Accurately demonstrate contour, form, and value in the selected media. A fine-line pen is the best tool for fine crosshatching, as the close marks will appear to blend together from a distance. Cross hatching is method which involves drawing alternate set of lines that cross-over each other in a criss-cross pattern. Scumbling Scumbling uses layers of small scribbled marks to build up value Here, the hatch marks go along the curves of the hand. Crosshatching: one of the six drawing techniques where a series of intersecting parallel lines are used to create a shading effect. Step 2 – Observe the figure well. When you told yourself that it’s ok if it fails, you have to have meant it. Crosshatching is used in pencil drawing, but is particularly useful with pen and ink drawing, to create … The representation of light utilizes the white or openness of the page, while shadow is created by a density of crossed lines. The difference is that the lines are curved to follow the contours of the subject. Wanting to draw a perfect portrait right out of the bat will probably end in frustration. You can see Chris’ figure drawings on his Instagram account – @chrisglibart. When you do contour lines in art, you should spend the majority of the time looking at the object, not your paper, in order to improve your hand-eye coordination and really get a good sense of what the object looks like. Shading is the part that makes a drawing go from a flat contour drawing to a 3 dimensional illusion. How to Draw a Dog With Ink Liners Step 1. In some drawings, even the hatching is left out. I usually prefer this style of hatching. The line following the edges when drawing an object; an outline. I like working with pencils, soft media, things that spread and smudge. Contour lines very in thickness and darkness and create more detail then volume. 3. We use cookies to ensure that we give you the best experience on our website. I just started my first college art class (I have no art making skills) and we are supposed to do 2 "linear pen drawings, one contour and one cross-hatching" from a given picture. Ultimately, it’s only the most important shapes of the parts of the figure important to the composition that really need to be in the drawing. The main difference between an ordinary hatch and a contour hatch is that the If you haven’t seen the articles, I recommend that you check them out. The representation of light utilizes the white or openness of the page, while shadow is created by a density of crossed lines. The hatching is fine and curved, adjusting to and creating the contours of the male figure. When you add basic hatching to your drawing, you'll use this skill to draw parallel lines over the area you wish to shade. Drawings become so enthralling when there’s missing information for you to fill in. See more ideas about Drawings, Cross hatching, Art. Since the lines are uniformly patterned, it works very well for shading things like wood grain, brushed metals and fingernails, just to name a few. Often, in more complex forms, cross-contours will be drawn at varying angles. Rather than simple parallel lines, contour hatching is when the lines follow the contours of the subject. Contour Hatching As the name already implies, this technique is more focused on highlighting the contours of the forms of the subject. You'll find practice makes perfect. Cross Contour hatching. Cross hatching is method which involves drawing alternate set of lines that cross-over each other in a criss-cross pattern. Hatching is the simplest and easiest. Mar 19, 2013 - Contour drawing / cross-hatching exercise. This is the same idea as contour hatching, but as contours can often move in several directions, the hatching can cross. Our minds can do the rest. It will have a clear shape with an edge, and Chris will often draw that edge to nicely contain the hatching. In some drawings, even the hatching is left out. Jul 9, 2018 - Board of examples of hatching and cross hatching that flows along with the three-dimensional direction of the shapes, to enhance the illusion of depth. Put them down like you believe in them, you mean them. If None, no hatching will be added to the contour. Buddha Drawing Contour Line Cross Hatching Smudging Beautiful Images Sketches Ink Statue Portrait. Drawing Techniques. A list of cross hatch patterns to use on the filled areas. Hatching We can create value by using linear hatching. It’s almost like Chris is pushing the limits of how little he needs to capture the thing about the figure and the pose that he loves. Take a moment to map out the drawing – alignments, angles and distances between important points in the figure – in your mind. I make a clean copy of my drawing with a pencil, transferring the main contours onto a blank sheet of paper. Ultimately, it’s only the most important shapes of the parts of the figure important to the composition that really need to be in the drawing. See more ideas about Drawings, Art, Life drawing. Best of all, these methods work just as efficiently in both pencil and pen and ink! After laying down one pass of hatch marks, another set of hatch marks are drawn on top, usually in a perpendicular or near-perpendicular direction to the first set. If this iterable is shorter than the number of contour levels it will be repeated as necessary. Most certainly inspiring and a reason to keep drawing, in spite of the many failures along the way. A list of cross hatch patterns to use on the filled areas. He’ll then use the thinner weight pen for contour lines within the figure. It’s great to not have a monotonous line, but to have thinner lines and thicker lines, even in the outline. Or can you lift your pen off the paper? Do you want to add dimension and texture to your drawings? In other words, when this part faces this way, and this part faces that way, he gives us a line to explain where these two planes meet each other. Step 5 – if it all goes wrong, do not worry. Crosshatching is the layering of planes of parallel lines on top of each other in order to create a gradient or texture in a drawing. I like having control over the weight of the stroke. But like I said earlier, Chris is more concerned with form than light, and he likes a powerful, clean container to wrap the form in. Students will learn about cross-hatching, artists who use cross-hatching to achieve tone and how to apply cross-hatching when drawing the human hand. Contour Lines 3.) This is all on one plane, we can see where the fingers are bending, we can see where the plane shifts to become the back of the hand. Scumbling Scumbling uses layers of small scribbled marks to build up value Jan 28, 2016 - Explore Maitreyee Bose's board "Cross Hatching" on Pinterest. Since we can see those, we don’t need lines separating the fingers. Below is a working example I took from the matplotlib website. If you continue to use this site we will assume that you are happy with it. I included mark-making to create a sense of value and textures. What I would like to do is to change the color of the hatching if it is possible. Crosshatching or hatching are useful ways of shading a drawing in pen, pencil or colored pencils. Contour Hatching with Mike Creighton – Sktchy. light or shadow. 14. The method is the same as above, with several layers of cross hatch marks rather than just two, to create even more nuanced differences in tone and value. C ross-hatching is a method of line drawing that describes light and shadow. Rembrandt Harmenszoon van Rijn is famous for many paintings, portraits mostly though also a great number of landscapes… Nov 11, 2019 - Cross-hatching drawing of still life, specifically several books and a cup of tea. Hatching, crosshatching and stippling are all ways to fool the eye into thinking that pure black marks on a white surface are really shades of gray. Are you a good one. Here, we only need to understand one edge of the leg – the rest of its volume we can fill in. Yes I agree – thanks for a great comment Cat 🙂. See more ideas about drawings, cross hatching, art. Big thanks to Chris for giving me permission to make this video/article, and for answering my questions about his drawings and his process, which I’ve included later in the video/article. He mentioned to me that one of his favourite artists and sources of inspiration is Alphonse Mucha. You can also add additional levels of hatching to farther deepen values. Hatching is supported in the PostScript, PDF, SVG and Agg backends only. Cross-Hatching is Fun. Contour hatching can help give a sense of form to curved 3D shapes. Bring your portraits to life with contour hatching. Notice on the sphere I drew the bottom of the circle with a heavier line than the top of the circle? Crosshatching is the drawing of two layers of hatching at right-angles to create a mesh-like pattern. Bring your portraits to life with contour hatching. Some of the finest examples of contour cross hatching come from this famous Renaissance Master. Some artists will under-emphasise non-focal areas – reduce contrast and detail – and then bring attention to focal points with contrast in value, contrast in warm and cool colour, sharp edges and more detail. Saved from drawingtatianablog.fashioneal.ru. Demonstrate how to create a contour line drawing of a dragon head, emphasizing the use of space. I went back through Chris’ Instagram feed all the way back to the beginning in 2015. Hatching (hachure in French) is an artistic technique used to create tonal or shading effects by drawing (or painting or scribing) closely spaced parallel lines. ... Hatching which follows a contour can also help to make objects appear more 3D. Contour hatching can also be crossed. Materials list: Sketchbook (at least 9” X 12”) Pencils (Soft leads) Ink pens (Mulitliners or pens that don't smear) […] All of the hatching is vertical in the example below, but it can be at any angle. Understanding the fundamentals of drawing with ink helps you greatly because any complex texture consists of the basic, very simple elements. I mean that volume and subtlety are delivered in a very clean and almost graphic style. Contour hatching. drawing from observation. basic compositional formats. If you examine the value scale below, you can see how the light end (left) uses a simple pattern of parallel lines spaced widely apart to represent light. Crosshatching is often used to create tonal effects, by varying the spacing of lines or by adding additional layers of lines. Contour Drawing Exercises: Using line alone eliminates the challenge of applying tone, colour and mediums; and instead focuses attention solely upon shape and proportion. basic understanding of shape and form. Contour hatching. He doesn’t have more dense hatching for darker bits and thinner hatching for lighter tones, to help explain more to our eyes about the figure. He usually only gives himself one density of hatching in a drawing. His use of minimalism in lines and expression work so nicely. It is possible to do hatching of regions using contourf function in matplotlib. You can also use parallel hatching to establish background values and add layers of contour hatching on top of it to emphasise the volume and form. That edge will also tell us a little more about the form. Here, the hatch marks go along the curves of the hand. This method of hatching greatly enhances the sense of volume and three-dimensionality of anything you are drawing, in addition to providing value. Some examples of Cross-hatching. That’s where that confidence comes from – the confidence he needs to be able to draw a figure in 10 lines directly with a fineliner. With contour hatching, your lines should follow the contour of the outline you’re shading. Contour Lines. With this hand, he’s giving us the outline of the whole thing. See more ideas about cross hatching, drawings, art drawings. Using Cross Contours in Hatching and Shading. […] This style often works best with a thicker pen. This is the richest and most subtle form of crosshatching, and it might even read as a tonal or pencil-shaded drawing from far away. It is a curved line following the contour. Site Suspended - This site has stepped out for a bit. Drawing line pencil cross hatching 66+ ideas. Bring your portraits to life with contour hatching. Hatched lines can be used with skill to produce astonishing results. To start, print out several copies of an outline of any object or shape (we used a hand). I included shading and lines to show form. Here, the hatch marks follow the curves of the hand. Cross hatching can be applied as simple straight lines, just like parallel hatching, or it can follow the contours of the subject as below. Only applies to contourf. Then, test each of the six hatching techniques below on a different image. In some drawings, even the hatching is left out. This site uses Akismet to reduce spam. Contour Drawings. So what you see is the focal point, and even then, a lot of that you have to fill in with your mind’s eye. In this rather lumpy example, the grid of cross-contours looks a bit like the gridlines on a globe or a diagram of a black hole in space. Line VariationA drawing that makes use of multiple types of lines - gesture, contour, structural, and calligraphic. Line can be used to show shape, contour, texture & tone. Crosshatching Chris draws with fineliner pens. Often it’s nice to use lighter weight lines on the edges where light is falling, for example, to make that edge feel lighter. This is such a well-known method that nearly every artist has encountered it, and it’s exactly what it sounds like. When you add basic hatching to your drawing, you'll use this skill to draw parallel lines over the area you wish to shade. (It is also used in monochromatic heraldic representations to indicate what the tincture of a "full-colour" emblazon would be.) Determines the number and positions of the contour lines / regions. Thanks for reading! The difference is that the lines are curved to follow the contours of the subject. This method is one of the quickest and most effective ways to vary the density and darken the values in your hatching. Let us know in the comments below. The contour lines tell you about the form, so actually even the hatched shading part isn’t essential. Then he’s added the plane of the back of the hand, so it becomes 3D. As you can see, it creates a richer overall feel to the drawing. A bit like how if you over-explain a joke, it’s not funny anymore – your mind has to make some of the connections. Cross-hatching refers to a softer, woven application often used to build up tonal areas of shadow. Explain how to use directional line to create the form of the dragon head. 1.) On the right: I used the cross hatching technique in my drawing of a still life. Explain how to build up the lines and values to create form and depth in the drawing of the dragon. Learn how your comment data is processed. Explore. Dotwork, or stippling The major techniques used in shading is Cross hatching, smooth pencil shading, Stippling pencil shading, Slinky pencil shading, Circulism pencil shading and Contour Shading. There isn’t too much scope for varying the thickness or the intensity of the marks like you could with charcoal or pencil or a brush or a pastel. On the left: I created a contour drawing of a simple still life. Just draw a series of short parallel lines in a row within the shape you want to shade. These shading methods work for any drawing medium that can't smudge or blend, and look good over blending on those that can. Step 3 – put down bold lines based on what you observed. May 2020. These are contour modeling lines (also called cross-contour hatching), which, when taken collectively, are also conceptualized as value. He could try to work around the limitations of the fineliners, for example using complex webs of crosshatching to show the gradual change in the tones across the figure. Is the most basic kind of descriptive line. Sep 7, 2020 - Explore Frank Hobbs: OWU Fine Arts's board "Drawing: Contour-hatching", followed by 709 people on Pinterest. This is a very striking and graphic style of hatching when used correctly. Does a contour drawing have to be made with one continuous line? If array-like, draw contour lines at the specified levels. Using Lines to Create Value There are three ways to use lines to create value: Stippling Hatching Cross-Hatching 15. See more ideas about cross hatching, drawing techniques, drawings. By varying the thickness, strength, taper, curvature, spacing, and length of the parallel lines, artists can convey form, shadow, distance, texture, and movement. Here’s a telling quote from one of his posts where his life drawing class was off one week: Chris practises consistently. He is muscular and cross hatching is used to good effect down his back, leg and buttocks. How to Draw Oak Bark in Pen and Ink Actually how about no shading, just contour lines… The contour lines tell you about the form, so actually even the hatched shading part isn’t essential. 3. That's another type of shading technique that I touched on briefly earlier in the DRAWING BASICS section. The outline and this shadow shape tell us where the first knuckles start and the second knuckles end. Even if you are using shading and attempting to create a smooth surface, being aware of the flow of cross-contours as you draw can help you create a shaded surface that follows and enhances the three-dimensional form, rather than fighting against it. The angle of the hatching as it moves around the form changes according to perspective. The first choice is a graphite pencil drawing, using hatching and cross-hatching to tone your drawing. Here are some of the basic ones, you can try them on a simple sphere design as a fun exercise. Shading is the part that makes a drawing go from a flat contour drawing to a 3 dimensional illusion. See more ideas about Cross hatching, Drawings, Sketches. Don’t answer that...of course you do. Step 4 – Take a step back every now and then to ensure scale is ok, and to ensure you are still mapping out the whole drawing. Rather than all parallel marks, this method uses short sets of parallel marks in one direction, then an adjacent group of parallel marks in an almost perpendicular direction. We often talk about varying line weights. Even the light and dark aren’t essential. Specific approaches include parallel-, cross-, and contour-hatching, as well as stippling (the use of dots). When you increase the density of a collection of hatch marks, the area will appear darker, which can also be useful for creating value variations. Little bit of negative space to explain that this finger is different to the others. Drawings. Contour shading is similar to hatching and cross hatching. He keeps things looking clean and crisp by using only single parallel hatching, not cross hatching or contour hatching. This method of hatching greatly enhances the sense of volume and three-dimensionality of anything you are drawing, in addition to providing value. If … He has lines to show the big shapes, and then sometimes a few lines to explain the texture. That edge we do get though needs to reflect the big shapes in the leg. If this iterable is shorter than the number of contour levels it will be repeated as necessary. His drawings then were good, but nowhere near the level he’s at now. The thing about Chris’ drawings is that you shouldn’t just learn from what’s there, but also from what’s not there. Rather than simple parallel lines, contour hatching is when the lines follow the contours of the subject. (It is also used in monochromatic heraldic representations to indicate what the tincture of a "full-colour" emblazon would be.) Demonstrate how to create a value scale using hatching and cross hatching. Art. Hatching and cross-hatching are some of the most valuable tools for generating value and texture in a drawing. Ultimately, it’s only the most important shapes of the parts of the figure important to the composition that really need to be in the drawing. 3. Don’t use a pencil underlayer, don’t build layers and correct, don’t try to force a good drawing. It is a very simple exercise and very important for beginners. What do you think of Chris’ drawings? Now you have the shape and texture, you can fill in the rest. Ok, lets get into it. A contour drawing is basically drawing the outline of things. Cross contours may be horizontal or vertical, as on the right side of the example, or both. Contour shading is similar to hatching and cross hatching. 2. The level heights are automatically chosen. There are other changes in the planes, but not top priority, so they don’t get lines. Hatching/Cross Hatching. Hatching This is done by drawing lines that run in parallel or side-by-side. That was just 3 years ago. These include the outline of the figure, as well as lines within the figure that tell us about major changes in the plane of the figure. draw n+1 contour lines. This is another very graphic style of hatching, consisting of very short parallel strokes or “ticks.” Because the marks are so small and short, you can almost pile them on top of each other to create density. What I would like to do is to change the color of the hatching if it is possible. Lets break down the figure drawings of Chris Glib, and see what we can learn for our own drawings. What are the steps and lines you would use to create a drawing of your hand? Fineliner pens create lines of relatively uniform weight. The effect looks woven when done well, and they can also be crosshatched to add additional density. Demonstrate how to create a contour line drawing of a dragon head, emphasizing the use of space. This simple technique uses small clusters of lines to add shadows and perspective to a sketch. The hatching pattern used by the sixteenth-century Dutch draftsman Jacob de Gheyn II demonstrates their use as contour modeling lines. In this class, you'll learn this essential technique for rendering volume and light while creating four portraits in four different mediums – graphite, ink + watercolor, colored pencil, gouache – with Portland-based portrait artist Mike Creighton. The lines follow the figure’s curvature rather than just being parallel. Definition: A continuous line drawing is produced without ever lifting the … Drawing a Portrait (Cross-Hatching Technique) I don’t mean that the figures are not 3D, they certainly are, or that there is no subtlety – there certainly is. Cross-hatching: Cross-hatching is a method of line drawing that describes light and shadow. Hatching, crosshatching and stippling are all ways to fool the eye into thinking that pure black marks on a white surface are really shades of gray. When lines are placed at an angle to one another, it is called cross-hatching. It is a line that joins itself to surround a shape. The contour lines tell you about the form, so actually even the hatched shading part isn’t essential. This method of hatching greatly enhances the sense of volume and three-dimensionality of anything you are drawing, in addition to providing value. May 23, 2017 - Explore Carly Deignan's board "Cross hatching & Contour lines" on Pinterest. You are your own art teacher. Wonderful analysis with a great lesson about accepting failure as an option – I think it is a very important part of being an artist that many tend to fight to accept. Explain how to use directional line to create the form of the dragon head. You can do this with any subject or object. Not only at young ages but as adults as well! Don’t forget to subscribe to our YouTube channel and hit the like button, and sign up to our newsletter below. Jan 25, 2018 - Explore Charlene Franck's board "cross hatching drawing" on Pinterest. He might use a couple of pen thicknesses, but that’s all the variation he has. Expressive lines, contours. Chris is still minimalist with his lines in the hair. This method of drawing is also known as contour hatching because it repeats the real shape of an object. Jul 9, 2018 - Board of examples of hatching and cross hatching that flows along with the three-dimensional direction of the shapes, to enhance the illusion of depth. Multiple layers in varying directions can be used to create textures. Cross-Hatching Drawings by Igor Lukyanov: " Cross-hatching is a rather rare drawing technique nowadays. Outline 2.) Contour hatching. This method of hatching greatly enhances the sense of volume and three-dimensionality of anything you are drawing, in addition to providing value. Fan contour lines from a narrow pinched shapes into open shapes, Contour lines can wrap around rounded forms. If an int n, use n data intervals; i.e. Below is a working example I took from the matplotlib website.
2020 contour hatching drawing