45afc4td wrote:

There's various different forms of gravity in physics engines that could be implemented.

Quadratic gravity (velocity increases by a constant each frame)
Cubic gravity
Exponential gravity
etc. you name it, all sorts of functions,

not to mention each of those may have modifications like terminal velocity, etc.

taopage wrote:

To have the physic, write griffpatch.guitub.io/scratch-gui/ dans recherche google

ResExsention wrote:

45afc4td wrote:

There's various different forms of gravity in physics engines that could be implemented.

Quadratic gravity (velocity increases by a constant each frame)
Cubic gravity
Exponential gravity
etc. you name it, all sorts of functions,

not to mention each of those may have modifications like terminal velocity, etc.

Alright, I'm not a physicist.

Again, would dropdowns work?

Shadow_Greninja wrote:

Griffpatch made a physics engine for Scratch, and I love it. It would be incredible if this was added to the actual Scratch. I mean, just think of all the possibilities it would add. We could make a realistic Angry Birds game with this, and adding physics to our projects would be much simpler

I think physics blocks should be one of the ‘extras’ like translation, pen, music, etc. I love the idea of being able to program physics on Scratch in a much more simpler way! Making Angry Birds is probably my favorite thing you could make with this.

If you want to check out griffpatch's physics extension, go to this link:
https://griffpatch.github.io/scratch-gui/

and be sure to watch this video to figure out how it works:
https://www.youtube.com/watch?v=WzFhOlY7Ul8

More suggestions may be added to this thread.

45afc4td wrote:

There's various different forms of gravity in physics engines that could be implemented.

Quadratic gravity (velocity increases by a constant each frame)
Cubic gravity
Exponential gravity
etc. you name it, all sorts of functions,

not to mention each of those may have modifications like terminal velocity, etc.

set gravity to (9.8) towards direction (270)::extension // sample number and angle

Sheep_maker wrote:

45afc4td wrote:

There's various different forms of gravity in physics engines that could be implemented.

Quadratic gravity (velocity increases by a constant each frame)
Cubic gravity
Exponential gravity
etc. you name it, all sorts of functions,

not to mention each of those may have modifications like terminal velocity, etc.

There is only quadratic gravity; on an ideal planet the acceleration due to gravity is constant for all objects, and acceleration is best modelled quadratically. Terminal velocity isn't necessary on Scratch because of how small the stage size is

I think this block could just be

set gravity to (9.8) towards direction (270)::extension // sample number and angle

Number inputs give the most functionality, though they may not be the most intuitive

45afc4td wrote:

Sheep_maker wrote:

snip

No. It is up to the project to decide how gravity behaves. As such, the programmer decides how should the gravity change with time. It is not necessarily a reflection of the actual, physical gravity. If it was, the block would have to have an input for the point of the center of the gravity.

b2Vec2 gravity(0, -9.8); //normal earth gravity, 9.8 m/s/s straight down!
bool doSleep = true;
  
b2World* myWorld = new b2World(gravity, doSleep);

Sheep_maker wrote:

If the programmer wants gravity to deviate from how acceleration and velocity works, then they aren't looking for a physics engine.

when green flag clicked
forever
change y by (-10)
end

when green flag clicked
forever
if <touching color [] ?> then
change y by (10)
end
end


If you know how to make the sprite, or player move, this is all you need to know!

Is_You_Me_isaiah wrote:

There is a fairly easy way, but there are MANY problems. Here it is!:

when green flag clicked
forever
change y by (-10)
end

when green flag clicked

forever
if <touching color ?> then
change y by (10)
end
end


If you know how to make the sprite (player) move, this is all you need to know!

move (oof) steps

when green flag clicked
forever

if <not <touching [ Grass, platform, or anything...] ?>> then
change y by (-5)

when green flag clicked
forever
if  <not <touching [Grass] ?>> then
change y by (-5)

Ryanrobinson0 wrote:

This is way easy for physics. It can take like 1 minute/60 secs probably.

when green flag clicked
forever
if  <not <touching [Grass] ?>> then
change y by (-5)

[counter v] = [0] ::variables stack
forever
frame::custom
wait(0)secs
end

define frame
[counter v] += [1] ::variables
change y by (item (counter) of [gravity v])
if<collision::custom>then
while<collision::custom>then  {
change y by [1]
}::control
[counter v] = [0] ::variables stack
end

move (343) steps

Realproject wrote:

move (343) steps

define 
[/#scratch ]