how do you raycast!?!?

sensei1007

the final thing i ever need to know on scratch is how do you raycast?! i know it involves

define

but i need to know more (P.S you need to be more experienced in scratch to know what a raycast is and how to code it)

ErnieParke

Recasting involves quite a bit of math, especially 3D. Here is a nice Wiki tutorial on how to make recasting, both with sprites and lists: Raycasting (wiki)

Linking,

ErnieParke

sensei1007

ErnieParke wrote:
Recasting involves quite a bit of math, especially 3D. Here is a nice Wiki tutorial on how to make recasting, both with sprites and lists: Raycasting (wiki)

Linking,

ErnieParke

THANK U

Last edited by sensei1007 (Feb. 19, 2016 17:16:11)

BKFighter

If you know what a ray is, then just send a ray in all directions, and return the distance to an object. Ray: https://www.brightstorm.com/math/geometry/geometry-building-blocks/rays/

maxkapow

This is a website you might want to check out:
www.lodev.org/cgtutor/raytracing

brynmorien

Raycasting seems to be quite difficult, and the scratch wiki isn't helping much, because I can't find out what sprites to put the code in, (I'm trying to learn sprite based,) and so all I ever get is a solid wall of color. Hopefully I'll find something online about this and I'll post it here.

cs544305

Raycasting is very easy.Use a square sprite.

when green flag clicked
forever
go to x: (0) y: (0)
clear
change y by (2)
stamp
change y by (2)
stamp
change y by (2)
stamp
change y by (2)
stamp
change y by (2)
stamp
change y by (2)
stamp
change y by (2)
stamp
change y by (2)
stamp
end

Last edited by cs544305 (May 28, 2017 21:06:04)

justdragon100

scratch wiki has answers

justdragon100

ErnieParke wrote:
Recasting involves quite a bit of math, especially 3D. Here is a nice Wiki tutorial on how to make recasting, both with sprites and lists: Raycasting (wiki)

Linking,

ErnieParke

how is list Raycast?

cs316735

See the Scratch Wiki. I learned about raycasting from it and now I use it in all sorts of games from racing games to platformers!

game_pr0grammer

cs544305 wrote:

Raycasting is very easy.Use a square sprite.

when green flag clicked
forever
go to x: (0) y: (0)
clear
change y by (2)
stamp
change y by (2)
stamp
change y by (2)
stamp
change y by (2)
stamp
change y by (2)
stamp
change y by (2)
stamp
change y by (2)
stamp
change y by (2)
stamp
end[/quote]

this isn't even raycasting

another_one_2

I think that's some type of joke 3D engine, it can't rotate around z or y axis

justdragon100

game_pr0grammer wrote:

cs544305 wrote:

Raycasting is very easy.Use a square sprite.

when green flag clicked
forever
go to x: (0) y: (0)
clear
change y by (2)
stamp
change y by (2)
stamp
change y by (2)
stamp
change y by (2)
stamp
change y by (2)
stamp
change y by (2)
stamp
change y by (2)
stamp
change y by (2)
stamp
end[/quote]

this isn't even raycasting[/quote]
Well it is a different 3d engine

cevacineva

ErnieParke wrote:
Recasting involves quite a bit of math, especially 3D. Here is a nice Wiki tutorial on how to make recasting, both with sprites and lists: Raycasting (wiki)

Linking,

ErnieParke

There is a thing. The drawing function is broken, drawing only some lines, but the frames are still going low
To know the framerate, make this script:

when green flag clicked

forever
change [Counter v] by (1)
wait (0) secs
if <(timer) > [1]> then
reset timer
set [On Screen Counter v] to (join [FPS or anything you like: ] [(Counter)])
set [Counter v] to [0]
end
end

PrincessFlowerTV

Wow, six necroposts! And all after the topic creator got his answer… pity.

LOL, but seriously, this topic should get closed so this doesn't get any more necroposts…

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