Skip to main content

Flowers stereographic projection

Projection is already ubiquitous in life. Projection is used in life. For example, in class, teachers will use projection to show the content of this lesson, and leaders at work will also use it as an auxiliary tool to show the next goal. Projection is widely used in life. It is a great auxiliary tool. Why? Because of its special properties, it can be adjusted by people, and the image can be enlarged and reduced by changing the distance. For example, the picture we watched in the cinema is a long-distance projection. These are all very well realized. Through the way of projection, the pattern on the cardboard can be projected by letting light pass through some cardboard with special patterns. These are all projected from one plane to another, and stereographic projection is a projection that projects a spherical surface to a plane. For example, the map is the stereographic projection of the earth. There will be a large gap between the actual projected image and the sphere itself. This kind of mapping will not maintain the same distance or area. So if we want to project some regular, special patterns, we need to change the spherical shape.
Because it will change the characteristics of graphics, in most cases, flat projection is used, and what I can think of is some colorful lights on the dance floor. Their appearance is some hollow spheres, and some colorful lights are placed inside and then projected. Various shapes. This is a great example, so I decided to try to make a projected pattern of evenly arranged flowers.

The pattern of the flower is very simple. We learned it when we was young. For example, you can get a small flower by overlapping four circles.
Uh... of course, the middle should be removed too, so put another square in the middle, then make some fine adjustments to the position, you can get a small flower.
Just one is not enough. We need more flowers so that we can project a larger area and observe the changes in the shape of the flowers on the sphere.
In this way, the evenly arranged small flowers are done. Above them is the light path. The light projected from the light source is set to a point, passes through the sphere from here, and then is projected onto the plane. This is the effect we want. So will the hollows of the sphere be arranged in an orderly manner?
It seems that the distance has changed. Although they are no longer equally spaced, their positions are also regular to follow. The closer to the top, the smaller the pattern and the smaller the distance between flowers.
This is the final version after some minor adjustments and moving the position of the flowers. The only difficulty is that my notebook is too stuck. I don’t know why it is stuck. Although I want to add another pattern, it’s stuck. It barely moved, so I had to give up the idea of adding leaves (one rectangle for the flower stem and two triangles for the leaves to make a real flower), but overall, it was good.

Its size is about: x = 59.2613, y = 59.2613, z = 58.8606

Comments

Popular posts from this blog

Do Over: Double Integrals over Regions

Introduction Over the semester we've looked at many topics and created 3D models. For this we are going to revisit an old topic, double integrals over a region. In this we found the volume of a surface in the xyz-plane bounded by two curves. From the many topics I chose to revisit this topic. I have a couple reason to why I chose to redo this. First, the model did not print correctly. The print added spaces between the rectangular prisms. Another reason was that I think the surface and curves did not represent the topic entirely. The surface I chose just increased between the curves. Improvements When making the model on Onshape there were no spaces between the rectangles, which can be seen on the right. However, when printing this spaces were being added. The second issue was with the surface I chose which was \(f(x,y)=xy+x\). This function only increased over the two curves I chose \begin{align*} f(x) &= \sqrt{x} ...

The Septoil Knot

Knots are a very interesting topic and a field that has not quite been fully discovered, so mathematicians are still discovering new ideas and invariances about knots even today. While it may seem like knots are a simple skill you learn at camp, they actually have a lot of mathematical properties and in this blog post we are going to look at just a few. By mathematical definition, a knot is a closed curve in three dimensional space that does not intersect itself. Since we are working with three dimensional space and you are reading this on a two dimensional screen, we need a way to look at knots in two dimensions and that is where knot projections come in. A knot projection is simply a picture of a knot in two dimensions and where a knot crosses itself in the projection is simply a crossing of that projection. The number of crossings of a knot is the smallest number of crossings among all projections of a knot. Since a knot is not necessarily solid, one...

Knot 10-84

Introduction In mathematics, a knot is simply a closed loop. The simplest version of this is the unknot, which is a just a closed circle (imagine a ponytail holder). Knots, however, quickly become more complicated than this more basic example. This post will examine a particular knot (knot 10-84) and a few of its knot invariants. Crossing Number Knots are often defined by their crossing number, which is the number of times the knot’s strands cross each other. As indicated in its name, knot 10-84 is a 10 crossing knot. In order to visualize the knot, we can look at its knot projection, in which the knot is represented by a line segment broken only at its undercrossings: Tricolorability Now that we’ve looked at knot crossings, we will examine a potential property of knots: tricolorability. In order to understand tricolorability, it is first important to know that one strand of a knot is defined as an unbroken line segment in the knot p...