How physics is programmed Flippers pinball

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AliceSim1

5

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Joined: 15th Oct 2018

Location: Barcelona

Posted: 17th Dec 2018 01:59

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Quick question, how can you program the physics of a pinball flippers?
I tried to try, but I do not give with the formula or technique, using 2D physics.
I attach the code.

// Project: ChainShape 
// Created: 2017-12-11
// set window properties
SetWindowSize( 1024, 768, 0 )
// set display properties
SetVirtualResolution( 1024, 768 ) // doesn't have to match the window
UseNewDefaultFonts( 1 ) // since version 2.0.22 we can use nicer default fonts

SetPhysicsScale(0.1)
SetPhysicsDebugOn()
//SetPhysicsWallTop (0)
SetPhysicsGravity (0,200)
// create a ball
LoadImage( 1, "ball-64.png" )
ball=0

// create a terrain
CreateDummySprite( 20 )
// place it at 0,0 so we can use world coordinates for the vertices
SetSpritePositionByOffset( 20, 0, 0 ) 
SetSpriteShapeChain( 20, 10, 0, 0, 20, 400, 1 )
SetSpriteShapeChain( 20, 10, 1, 0, 80, 500, 1 )
SetSpriteShapeChain( 20, 10, 2, 0, 210, 550, 1 )
SetSpriteShapeChain( 20, 10, 3, 0, 300, 570, 1 )
SetSpriteShapeChain( 20, 10, 4, 0, 360, 570, 1 )
SetSpriteShapeChain( 20, 10, 5, 0, 430, 535, 1 )
SetSpriteShapeChain( 20, 10, 6, 0, 484, 500, 1 )
SetSpriteShapeChain( 20, 10, 7, 0, 532, 520, 1 )
SetSpriteShapeChain( 20, 10, 8, 0, 600, 600, 1 )
SetSpriteShapeChain( 20, 10, 9, 0, 715, 626, 1 )
// make it static
SetSpritePhysicsOn( 20, 1 )

//Create two rotating boards
// Create a green image
CreateImageColor(3,0,255,128,0)
// Make the left board
CreateSprite(21,3)
// Set it's size 160 in the x axis, 20 in the y
SetSpritesize(21,160,10)
SetSpriteOffset (21,10,5)
// Position on the left side of the screen
SetSpritePosition(21,40,400)
// Turn on physics and set as a Kinematic object
SetSpritePhysicsOn(21,3)

// Make the left board
CreateSprite(22,3)
// Set it's size 160 in the x axis, 20 in the y
SetSpritesize(22,160,10)
SetSpriteOffset (22,150,5)
// Position on the left side of the screen
SetSpritePosition(22,300,400)
// Turn on physics and set as a Kinematic object
SetSpritePhysicsOn(22,3)
ang=20:ang2=-20
do
	if GetRawKeyState(27) then END
	
	if GetRawKeyPressed(32) and ball<19
		inc ball
		CreateSprite( ball, 1 )
		SetSpriteSize( ball, 25, 25 )
		SetSpritePosition( ball, 50, 100 )
		// make it a circel
		SetSpriteShape( ball, 1 )
		// make it dynamic
		SetSpritePhysicsOn( ball, 2 )
		SetSpritePhysicsCanRotate (ball, 0)
		SetSpritePhysicsFriction (ball, 0.001)
		SetSpritePhysicsMass (ball,0)
		SetSpritePhysicsRestitution (ball, 0.5)
		SetSpritePhysicsDamping (ball, 0)
		
		
	endif
    
    Sync()
    if GetRawKeyState(259)
		if ang>-20
			ang=ang-10
			if ang<-20 then ang=-20
			if ball>0
				for i=1 to ball
					if GetPhysicsCollision(21,i)
					    SetSpritePhysicsVelocity(i,ang*10,-(600+ang*10))
					endif
				next i
			endif
		endif
	elseif ang<20
		ang=ang+5
		if ang>20 then ang=20 
	endif
	SetSpriteAngle(21,ang)
	
	if GetRawKeyState(260)
		if ang2<20
			ang2=ang2+10
			if ang2>20 then ang2=20
			if ball>0
				for i=1 to ball
					if GetPhysicsCollision(22,i)
					    SetSpritePhysicsVelocity(i,ang2*10,-(600+ang*10))
					endif
				next i
			endif
		endif
	elseif ang2>-20
		ang2=ang2-5
		if ang2<-20 then ang2=-20 
	endif
	SetSpriteAngle(22,ang2)
	
	
loop

+ Code Snippet

// Project: ChainShape 
// Created: 2017-12-11
// set window properties
SetWindowSize( 1024, 768, 0 )
// set display properties
SetVirtualResolution( 1024, 768 ) // doesn't have to match the window
UseNewDefaultFonts( 1 ) // since version 2.0.22 we can use nicer default fonts

SetPhysicsScale(0.1)
SetPhysicsDebugOn()
//SetPhysicsWallTop (0)
SetPhysicsGravity (0,200)
// create a ball
LoadImage( 1, "ball-64.png" )
ball=0

// create a terrain
CreateDummySprite( 20 )
// place it at 0,0 so we can use world coordinates for the vertices
SetSpritePositionByOffset( 20, 0, 0 ) 
SetSpriteShapeChain( 20, 10, 0, 0, 20, 400, 1 )
SetSpriteShapeChain( 20, 10, 1, 0, 80, 500, 1 )
SetSpriteShapeChain( 20, 10, 2, 0, 210, 550, 1 )
SetSpriteShapeChain( 20, 10, 3, 0, 300, 570, 1 )
SetSpriteShapeChain( 20, 10, 4, 0, 360, 570, 1 )
SetSpriteShapeChain( 20, 10, 5, 0, 430, 535, 1 )
SetSpriteShapeChain( 20, 10, 6, 0, 484, 500, 1 )
SetSpriteShapeChain( 20, 10, 7, 0, 532, 520, 1 )
SetSpriteShapeChain( 20, 10, 8, 0, 600, 600, 1 )
SetSpriteShapeChain( 20, 10, 9, 0, 715, 626, 1 )
// make it static
SetSpritePhysicsOn( 20, 1 )


//Create two rotating boards
// Create a green image
CreateImageColor(3,0,255,128,0)
// Make the left board
CreateSprite(21,3)
// Set it's size 160 in the x axis, 20 in the y
SetSpritesize(21,160,10)
SetSpriteOffset (21,10,5)
// Position on the left side of the screen
SetSpritePosition(21,40,400)
// Turn on physics and set as a Kinematic object
SetSpritePhysicsOn(21,3)


// Make the left board
CreateSprite(22,3)
// Set it's size 160 in the x axis, 20 in the y
SetSpritesize(22,160,10)
SetSpriteOffset (22,150,5)
// Position on the left side of the screen
SetSpritePosition(22,300,400)
// Turn on physics and set as a Kinematic object
SetSpritePhysicsOn(22,3)
ang=20:ang2=-20
do
	if GetRawKeyState(27) then END
	
	if GetRawKeyPressed(32) and ball<19
		inc ball
		CreateSprite( ball, 1 )
		SetSpriteSize( ball, 25, 25 )
		SetSpritePosition( ball, 50, 100 )
		// make it a circel
		SetSpriteShape( ball, 1 )
		// make it dynamic
		SetSpritePhysicsOn( ball, 2 )
		SetSpritePhysicsCanRotate (ball, 0)
		SetSpritePhysicsFriction (ball, 0.001)
		SetSpritePhysicsMass (ball,0)
		SetSpritePhysicsRestitution (ball, 0.5)
		SetSpritePhysicsDamping (ball, 0)
		
		
	endif
    
    Sync()
    if GetRawKeyState(259)
		if ang>-20
			ang=ang-10
			if ang<-20 then ang=-20
			if ball>0
				for i=1 to ball
					if GetPhysicsCollision(21,i)
					    SetSpritePhysicsVelocity(i,ang*10,-(600+ang*10))
					endif
				next i
			endif
		endif
	elseif ang<20
		ang=ang+5
		if ang>20 then ang=20 
	endif
	SetSpriteAngle(21,ang)
	
	if GetRawKeyState(260)
		if ang2<20
			ang2=ang2+10
			if ang2>20 then ang2=20
			if ball>0
				for i=1 to ball
					if GetPhysicsCollision(22,i)
					    SetSpritePhysicsVelocity(i,ang2*10,-(600+ang*10))
					endif
				next i
			endif
		endif
	elseif ang2>-20
		ang2=ang2-5
		if ang2<-20 then ang2=-20 
	endif
	SetSpriteAngle(22,ang2)
	
	
loop

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puzzler2018

User Banned

Posted: 18th Dec 2018 22:38

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Looks good to me - why built in physics

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Sedit

6

Years of Service

User Offline

Joined: 3rd Sep 2017

Location: Ghetto of NJ

Posted: 19th Dec 2018 04:02

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Question is how accurate do you want it? There are a couple routes for physics to go here, Personally I would prob perform OBB(flipper) vs Sphere(ball) collision detection, Find the normal for the OBB surface at the time of collision and use that to calculate the new angle of the ball but you will need to have force, mass, and velocity for your flipper and your ball. This is not terribly hard once you understand the formulas although for accurate responses you would need angular momentum and even though I have quite a bit of experience with this sort of stuff I can not 100% say what I can pull off the top of my head in that is good.

Sphere sphere = new Sphere(0.5f);
InsanelyRedundantJava insanelyredundantjava = new InsanelyRedundantJava(Redundancy1, Redundancy2);

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blink0k

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11

Years of Service

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Joined: 22nd Feb 2013

Location: the land of oz

Posted: 19th Dec 2018 07:07 Edited at: 19th Dec 2018 07:07

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This works. Not sure if it's the "correct way" but i think it will be ok
Press SPACEBAR to flip the flipper

// Project: ChainShape 
// Created: 2017-12-11
// set window properties
SetWindowSize( 1024, 768, 0 )
// set display properties
SetVirtualResolution( 1024, 768 ) // doesn't have to match the window
UseNewDefaultFonts( 1 ) // since version 2.0.22 we can use nicer default fonts

SetPhysicsScale(0.1)
SetPhysicsDebugOn()
//SetPhysicsWallTop (0)
SetPhysicsGravity (0,100)
// create a ball
LoadImage( 1, "ball-64.png" )
ball=0

// create a terrain
ball = CreateSprite( 0 )
SetSpriteSize(ball, 20, 20)
SetSpritePositionByOffset(ball, 50, 20)
SetSpriteShape(ball, 1)
SetSpritePhysicsOn( ball, 2 )		// 2= dynamic object

flipper = CreateSprite(0)
setspritesize(flipper, 90, 30)
SetSpriteOffset(flipper, 15, 15)
SetSpritePosition(flipper, 10, 700)
SetSpriteAngle(flipper, 30)
SetSpriteShape(flipper, 0)
SetSpritePhysicsOn( flipper, 3 )

do
	if GetRawKeyState(27) then END
	
	if GetSpriteAngle(flipper) < -30
		SetSpritePhysicsAngularVelocity( flipper, 0 ) 
		SetSpriteAngle(flipper, 30)
	
	endif
	
	if GetRawKeyPressed(32)
		SetSpritePhysicsAngularVelocity( flipper, -20 ) 
	endif
	
	sync()
	
loop

+ Code Snippet

// Project: ChainShape 
// Created: 2017-12-11
// set window properties
SetWindowSize( 1024, 768, 0 )
// set display properties
SetVirtualResolution( 1024, 768 ) // doesn't have to match the window
UseNewDefaultFonts( 1 ) // since version 2.0.22 we can use nicer default fonts

SetPhysicsScale(0.1)
SetPhysicsDebugOn()
//SetPhysicsWallTop (0)
SetPhysicsGravity (0,100)
// create a ball
LoadImage( 1, "ball-64.png" )
ball=0

// create a terrain
ball = CreateSprite( 0 )
SetSpriteSize(ball, 20, 20)
SetSpritePositionByOffset(ball, 50, 20)
SetSpriteShape(ball, 1)
SetSpritePhysicsOn( ball, 2 )		// 2= dynamic object



flipper = CreateSprite(0)
setspritesize(flipper, 90, 30)
SetSpriteOffset(flipper, 15, 15)
SetSpritePosition(flipper, 10, 700)
SetSpriteAngle(flipper, 30)
SetSpriteShape(flipper, 0)
SetSpritePhysicsOn( flipper, 3 )		



do
	if GetRawKeyState(27) then END
	
	if GetSpriteAngle(flipper) < -30
		SetSpritePhysicsAngularVelocity( flipper, 0 ) 
		SetSpriteAngle(flipper, 30)
	
	endif
	
	if GetRawKeyPressed(32)
		SetSpritePhysicsAngularVelocity( flipper, -20 ) 
	endif
	
	sync()
	
loop

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AliceSim1

5

Years of Service

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Joined: 15th Oct 2018

Location: Barcelona

Posted: 19th Dec 2018 19:57

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Searching I found these codes, 2D and 3D.
They are very successful, especially the 3D I was surprised enough to see how beautiful it looks, and the physical seems real, like pinball simulators.

I look, something that simulates (no real need) and does not break the game, that the ball does not pass through the flipper speed.

What dou you recommend? The integrated physics of AKG are very good, it is necessary to find a solution for the flipers.

In these examples of these users there are very good!

Conjured Entertainment - pinball_flippers.zip
https://forum.thegamecreators.com/thread/213965#msg2555419

3D Physics Pinball Flippe
https://forum.thegamecreators.com/thread/221499

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