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Spacecraft Positioning System - Deep Space Web

Image:
screenshot of the scene

Author: UnityDogGaming04

Group: Default

Filesize: 8.65 kB

Date added: 2021-09-20

Rating: 5

Downloads: 931

Views: 233

Comments: 7

Ratings: 1

Times favored: 0

Made with: Algodoo v2.1.0

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Four antennae point at your spacecraft. Usually, only two can see it at the same time (these lasers intersect at the position of the craft), but if you're far enough away, three can see it. At launch, only the red one can see it. At certain points on the surface of the green planet, none can see it. The closer the spacecraft is to the green planet, the more precisely the position is measured. Try to land on the moon!
CONTROLS:
WASD
Last edited at 2021/09/23 04:35:22 by UnityDogGaming04
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What are the control keys? :s Arrow keys don't seem to do anything.

Also, you say "Try to land on the moon!" So, where is the moon? I see the green planet, but no moon. :huh:

WAIT... I think I see the problem. You have TWO versions of this scene stuck together. There is a green planet located at pos [0,0] and another one at pos [1528.0, 1536.0]! Download this scene and see for yourself!
Last edited at 2021/09/21 02:42:51 by Xray
Oh, forgive me. Making the same mistakes every time. the moon is off to the right and the controls are WASD.
Also, the stuff off to the top right is the "True" stuff of the scene, like where the planets are in real life. The stuff around the origin is the "Model" stuff, think a 3d model of the solar system.
Are you sure that you took care of the things I mentioned earlier? The WASD keys control a tiny rocket (a white circle) which is very far away from the planet and moon. In fact it is near the other planet in your scene which is at origin [0,0]. It is not near the planet that has 4 lasers. Did you see that you have TWO planets and TWO moons in this scene?

TIP: Each time I upload a scene to Algobox, I immediately download the same scene and test it just to make sure I didn't miss something. I don't believe you did that, because if you did, you would see the problem that I am seeing. There is something weird in this scene which I don't think you see!
Last edited at 2021/09/23 04:55:56 by Xray
Yes, I am aware of the double planet and double moon, it's intentional. It's really hard to explain, but the bigger stuff near [1528.0, 1536.0] is what you say it is, the real rocket, the real planet and moon. The stuff about the origin is a scale model of the bigger stuff, only representing the real stuff, a bit like a screen representing the internal state of a computer. You're meant to look at the scale model to use the scene, because just like in real life, you can't know where the moon or a satellite is without measuring and putting together a visual model.
Okay, I can understand that. But (yup, there's still a but) the tiny circle you call a rocket, which is controlled with WASD keys, is SOOOOOOOOOOOO far away from the planet with the lasers that a user cannot possibly see what he/she is controlling. The scene starts with the planet/lasers and the moon being displayed in the center of the screen but the rocket is no where in sight. That's because it is located way over next to the planet that you call the scale model. Was that intentional? :s
Last edited at 2021/09/24 01:59:23 by Xray
Yes, that was intentional. I edited the title to state that the four lasers intersect at the measured position of the rocket, down in the scale model. If you move the rocket around, you can see that the intersection moves around just like the rocket does all the way out there. It's sort of like a radar screen!