Jumping - История изменений

Patarakin: /* Simple jumping */

2022-09-10T08:31:25Z

Simple jumping

← Предыдущая версия		Версия от 11:31, 10 сентября 2022
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	==Simple jumping==		==Simple jumping==
	The following is commonly used in animations and results in a sprite effectively teleporting upwards, and then downwards again.		The following is commonly used in animations and results in a sprite effectively teleporting upwards, and then downwards again.

	<scratchblocks>		<scratchblocks>
	when green flag clicked		when green flag clicked
Строка 14:		Строка 15:
	change y by (50)		change y by (50)
	wait (0.5) secs		wait (0.5) secs
	change y by (-50)		change y by (-50) // русский комментарий
	end		end
	</scratchblocks>		</scratchblocks>

Patarakin в 17:31, 4 сентября 2022

2022-09-04T17:31:38Z

← Предыдущая версия		Версия от 20:31, 4 сентября 2022
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	{{Scripting Tutorials		{{Scripting Tutorials
	\|Description=Как научить агента прыгать?		\|Description=Как научить агента прыгать?
			\|Field_of_knowledge=Информатика
	\|Возрастная категория=7		\|Возрастная категория=7
	}}		}}

Patarakin в 17:26, 4 сентября 2022

2022-09-04T17:26:34Z

← Предыдущая версия		Версия от 20:26, 4 сентября 2022
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			{{Scripting Tutorials
			\|Description=Как научить агента прыгать?
			\|Возрастная категория=7
			}}
	There are many ways to make a sprite appear to '''jump''', depending on how you want a [[sprite]] to and how realistic it looks. This article contains a number of them, categorized from least-realistic to most realistic. The '''key press up key''' is usually used for jumping in games, but sometimes key press Space or even the mouse is used for jumping.		There are many ways to make a sprite appear to '''jump''', depending on how you want a [[sprite]] to and how realistic it looks. This article contains a number of them, categorized from least-realistic to most realistic. The '''key press up key''' is usually used for jumping in games, but sometimes key press Space or even the mouse is used for jumping.

Patarakin в 17:17, 4 сентября 2022

2022-09-04T17:17:32Z

← Предыдущая версия		Версия от 20:17, 4 сентября 2022
Строка 1:		Строка 1:
	There are many ways to make a sprite appear to '''jump''', depending on how you want a [[sprite]] to and how realistic it looks. This article contains a number of them, categorized from least-realistic to most realistic. The {{key press\|up}} key is usually used for jumping in games, but sometimes {{key press\|Space~~}}, {{key press\|Z}},{{key press\|X}},{{key press\|W}},~~ or even the mouse is used for jumping.		There are many ways to make a sprite appear to '''jump''', depending on how you want a [[sprite]] to and how realistic it looks. This article contains a number of them, categorized from least-realistic to most realistic. The '''key press up key''' is usually used for jumping in games, but sometimes key press Space or even the mouse is used for jumping.

	==Simple jumping==		==Simple jumping==
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	[[Category:Scripting Tutorials]]		[[Category:Scripting Tutorials]]
	~~[[Category:Physics Tutorials]]~~
	~~[[ja:ジャンプする]]~~

Patarakin: 1 версия импортирована

2022-07-21T08:33:13Z

1 версия импортирована

← Предыдущая версия	Версия от 11:33, 21 июля 2022
(нет различий)

scratch>There is only one: /* Realistic Jumping */

2021-10-06T15:57:27Z

Realistic Jumping

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There are many ways to make a sprite appear to '''jump''', depending on how you want a [[sprite]] to and how realistic it looks. This article contains a number of them, categorized from least-realistic to most realistic. The {{key press|up}} key is usually used for jumping in games, but sometimes {{key press|Space}}, {{key press|Z}},{{key press|X}},{{key press|W}}, or even the mouse is used for jumping.

==Simple jumping==
The following is commonly used in animations and results in a sprite effectively teleporting upwards, and then downwards again.
<scratchblocks>
when green flag clicked
forever
if <key [up arrow v] pressed?> then //typical jumping key
change y by (50)
wait (0.5) secs
change y by (-50)
end
</scratchblocks>

The below script results in the sprite moving up if the up arrow is pressed.

<scratchblocks>
when green flag clicked
forever
if <key [up arrow v] pressed?> then //typical jumping key
change y by (5)
end
</scratchblocks>
It was used in the Scrolling Demo [[project]] by [[Sample Projects|SampleProjectsTeam]].

Another jumping method which works very effectively and realistic is this.
<scratchblocks>
when green flag clicked
forever
if <key [up arrow v] pressed?> then //typical jumping key
repeat (10)
change y by (20)
end
repeat (10)
change y by (-20)
end
</scratchblocks>
This is very fast but you can adjust the speed by adding a "wait block" before the "change y" block.

==Falling==
The following script "teleports" the sprite upwards, and then has it fall back down at a constant rate, until it lands on a platform.

<scratchblocks>
when green flag clicked
forever
if <key [up arrow v] pressed?> then //typical jumping key
change y by (50)
repeat until <touching color [#000000]?> //color of the ground
change y by (-5)
end
end
end
</scratchblocks>

The next script makes the sprite rise up at a constant rate and fall back down at a constant rate.

<scratchblocks>
when gf clicked
forever
if <key [up arrow v] pressed?> then //typical jumping key
repeat (10)
change y by (5)
end
repeat until <touching color [#000000]?> //color of the ground
change y by (-5)
end
end
</scratchblocks>

==Limited Jumps==
In most video games, you cannot jump more than a certain number of times, and you cannot jump in midair. This can be implemented in Scratch.

The pink blocks labeled "jump" represent a compatible jump script.

To allow you to only jump on the ground, use the following script.

<scratchblocks>
when gf clicked
forever
if <<key [up arrow v] pressed?> and <touching color [#000000]>> then // typical jumping key, color of the ground
change y by (5)
jump::custom
end
</scratchblocks>

Double jumping is a common element in video games. Although not possible in real life, these scripts can make you jump up to two times.

<scratchblocks>
when gf clicked
forever
if <touching color [#000000]?> then // color of the ground
set [jumps v] to [0]
end

when gf clicked
forever
if <<key [up arrow v] pressed?> and <touching color [#000000]>> then // typical jumping key
change y by (5) // this will keep the first script for resetting the jump count
change [jumps v] by (1)
jump::custom
else
if <<key [up arrow v] pressed?> and <(jumps) < [2]>> then // This will keep you from jumping more than twice
change [jumps v] by (1)
jump::custom
end
end
</scratchblocks>

To make the sprite jump up to ''n'' times, change the ''2'' to an ''n''.

==Realistic Jumping==
To make a simple jumping game (not to be confused with [[platformer]]), follow this script:

<scratchblocks>
when green flag clicked
go to x: [*input*] y: [*input*]
set [y speed v] to [0] //This is just for setting everything up
</scratchblocks>

Then enter this snippet of code:

<scratchblocks>
when [space v] key pressed
set [y speed v] to [*input*]
repeat (((y speed) * (2)) + (1))
change y by (y speed)
change [y speed v] by [-1]
end
</scratchblocks>

If one of the scripts do not work, it can be changed.

==Physically Accurate Jumping==
===With Ground Detection===
A more realistic effect for jumping commonly used in games is the following, using a [[variable]] to control the vertical speed of a sprite (simulating gravity) is this:

<scratchblocks>
when green flag clicked
set [y speed v] to [0] //How fast the sprite is moving upwards.
forever
change y by (y speed)

when green flag clicked
forever
...//Check if the player is on the ground.
if <touching color [#000000]?> then // The color of the platforms.
set [y speed v] to (0)
...//Check if the player wants to jump.
if <key [up arrow v] pressed?> then
...//Jump!
set [y speed v] to (9.9)
end
end
change [y speed v] by (-0.5) // Gravity
</scratchblocks>

===Without Ground Detection===
If one does not need to sense the ground and simply want a realistic, gravitational jump, that will end at the starting point, the following script can replicate the jump:
<scratchblocks>
when gf clicked
forever
if <key [up arrow v] pressed?> then
set [y vel v] to (10)
repeat (20)
change y by (y vel)
change [y vel v] by (-1) //simulates gravity
end
end
</scratchblocks>

==See Also==

* [[Simulating Gravity]]
* [[Velocity]]
* [[Physics Engine]]

[[Category:Scripting Tutorials]]
[[Category:Physics Tutorials]]
[[ja:ジャンプする]]