![]() These lines represent the newest growth and will, therefore, be the thinnest parts of the tree. Next, begin to draw faintly drawn lines which will represent the branches of the tree.To begin you will need to draw many faintly drawn lines of representing the extent of growth from the branches, these lines can overlap, as they would be nature.One effective method of drawing trees is to draw the branches first from the crown down. The crown of the tree is the furthest extent to which a clump of branches will grow. A good piece of advice is to produce a series of quick warm-up sketches, which will allow you to develop a feeling for what you are drawing. So studying the 3-dimensional form of the tree in the round can offer real benefits.Also, consider your location, are you drawing trees on mass in woodland or is it a single isolated tree in a garden or park.Drawing from direct observation will also allow you to find the best view from which to draw a tree, a flat photographic representation of a tree will never replace this.If you want to learn how to draw a tree in pen, please read my post, How to Draw a Tree in Pen and Ink. This is not my actual code, I have simplified it for better understanding.How Do you Draw a Simple Tree Step by Step? How to Draw a Tree from Direct ObservationĪ tree is best drawn from direct observation as this will let experience the full form of the tree in the round. The following code implements the above concept. Another benefit of dividing a trunk into many smaller segments is that I can randomly change the angle of each small segment to make it bend more like a real tree. ![]() This balances the drawing process between smoothness and efficiency. Also, in order to increase the efficiency of that process, I divided longer branches into more segments, and shorter branches into fewer segments. I divided the original line into several different segments, and then gradually decreased the stroke weight. I began to think about how to make the thickness of the trunk appear smoother. ![]() We now already have the basic form of a tree, but the tree lacks vitality. Instead I use polar coordinates to calculate the starting and ending position of each branch in global(original) coordinates, and then draw directly on the PGraphics buffer. This approach could simplify drawing the branch and reduce mathematical calculations, but I thought that would consume a lot of memory stack. Usually in Processing you can recursively call pushMatrix() to shift the origin and angle of the current coordinate. I then randomly create 2 or 3 branches in each recursive call the thickness also decreases with each call. In the very first version, I just draw white trunks on a black background using the line() funtion in Processing. In this article I will show some diagrams and code snippets to explain how this work has gradually developed from the original version to the final pencil-sketch like drawing. The only drawing tools I used are point(), ellipse(), line(), and simple mathematical calculations which are very basic features in Processing or in other programming-based drawing tools. ![]() You might guess that I probably used 3D drawing, lighting effects, texture mapping, and other complicated tricks to create this work, but in fact I didn't use any of these things this work is a pure 2D drawing, and does not use any bitmap material. until the result looked like a real pencil sketch. Then I gradually added improvements in several stages: gradual thickness, randomly twisted branches, shades of light, bark texture, etc. It started with the "recursive function." The first version was just a tree made up of a bunch of straight lines. The forest that I have drawn is no exception. All well-trained programmers will, on reflection, explain how to use a "recursive function" to draw the structure of a tree. Drawing a tree using code is a very basic exercise in programming.
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