Calculate shadow path & size + object size based on distance

  • Thread starter Thread starter chubby92
  • Start date Start date
  • Tags Tags
    Path Shadow
AI Thread Summary
To calculate the shadow path and size of a 2D circle moving in a 3D space, consider the circle's radius, position, and the light source's fixed position above the circle. The shadow's size will depend on the distance from the light source and the circle's movement path. Understanding 3D projection techniques is essential for accurate calculations, as the shadow's geometry is influenced by the circle's position relative to the light source. Algebraic methods can be used to implement the geometric principles involved. Familiarizing yourself with perspective transformations will aid in visualizing and calculating the shadow's behavior.
chubby92
Messages
1
Reaction score
0
What are the variables I need to take in account if I want to calculate shadow path and size?
I will try to simplify my questions.

I have a 2d circle (radius: 28) which means the size of the circle (in box) is 56x56 at specific point (lets say 300,300).

I tell the 2d circle to go in specific path, let's say from 300,300 to 300,200.

I want to tell its shadow what path to do based on the 2d circle path.

ofcourse the size of the ball need to be calculated aswell..

I guess I need some extra variables because I am talking about 3d space in 2d.. (lets say the "sun" is always above the ball so u don't need to calculate its degrees from the "sun", only its distance)
I am pretty sure it's possible but I have no idea how to calculate and what extra variables I need...
Hopefully you understood what I want, if u didnt just tell me which part and I will try to re-explain or something.

Thanks
 
Last edited:
Physics news on Phys.org

Thread 'The Effect of Linear and Rotational Motion on Measured Weight'

Consider an extremely long and perfectly calibrated scale. A car with a mass of 1000 kg is placed on it, and the scale registers this weight accurately. Now, suppose the car begins to move, reaching very high speeds. Neglecting air resistance and rolling friction, if the car attains, for example, a velocity of 500 km/h, will the scale still indicate a weight corresponding to 1000 kg, or will the measured value decrease as a result of the motion? In a second scenario, imagine a person with a...
View full post »
Thread 'Gauss' law seems to imply instantaneous electric field propagation'

Thread 'Gauss' law seems to imply instantaneous electric field propagation'

Imagine a charged sphere at the origin connected through an open switch to a vertical grounded wire. We wish to find an expression for the horizontal component of the electric field at a distance ##\mathbf{r}## from the sphere as it discharges. By using the Lorenz gauge condition: $$\nabla \cdot \mathbf{A} + \frac{1}{c^2}\frac{\partial \phi}{\partial t}=0\tag{1}$$ we find the following retarded solutions to the Maxwell equations If we assume that...
View full post »

Thread 'Simple thought experiment with Stefan-Boltzmann law: energy'

Dear all, in an encounter of an infamous claim by Gerlich and Tscheuschner that the Greenhouse effect is inconsistent with the 2nd law of thermodynamics I came to a simple thought experiment which I wanted to share with you to check my understanding and brush up my knowledge. The thought experiment I tried to calculate through is as follows. I have a sphere (1) with radius ##r##, acting like a black body at a temperature of exactly ##T_1 = 500 K##. With Stefan-Boltzmann you can calculate...
View full post »

Similar threads

I Statistical physics in 2D world: How to simulate gas and its interaction with objects? (game design)
Replies
6
Views
1K
I Acceleration through curved paths
Replies
39
Views
5K
B A scenario of non-uniform circular motion
Replies
4
Views
112
A Oddly specific question for help regarding a satellite in a shadow
Replies
8
Views
2K
Calculation of electrical mean free path in nanomaterials?
Replies
0
Views
3K
Calculate Height of Light Pole from Shadow Length
Replies
4
Views
2K
I What is the zero point for Potential Energy and how to find it from integral limits?
Replies
6
Views
1K
I Is the Sample Size Calculation in This Article Accurate?
Replies
5
Views
2K
I Can We Predict the Sun's Path from a Single Altitude Measurement?
Replies
12
Views
2K
Spinning ball deviation from straight path | Magnus effect
Replies
1
Views
3K

Hot Threads

Recent Insights

Back
Top