What am I doing wrong with the COS() and SIN ()? Not returning correct values

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Golelorn

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Joined: 20th Nov 2016

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Posted: 12th Apr 2018 17:47 Edited at: 12th Apr 2018 17:58

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Well, I see the COS and SIN in AppGameKit already turn the angles into radians - so nevermind about the title topic.

My next problem is that is a weird looking circle. The sides are thicker than the top and bottom. Anyone have any experience in that?

+ Code Snippet

SetVirtualResolution ( 1024, 768 )


CreateImageColor(1, 255, 255, 255, 255 )

	radius# = 25.0
      
for angle = 0 to 360
	angle# = angle
	 i = CreateSprite( 1 )
	 SetSpriteSize ( i, 5, 5 )
	 thetaX# = sin(angle#)
	 thetaY# = cos(angle#)
	 x# = 512.0+radius#*thetaX#
	 y# = 384.0-radius#*thetaY#
	 SetSpritePosition( i, x#, y# )

next angle

do
	 print(thetaX#)
	 print(thetay#)
	
	sync()

loop

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puzzler2018

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Posted: 12th Apr 2018 18:44 Edited at: 12th Apr 2018 18:52

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A createsprite like your doing will produce a box.

Try finer rotations using floats on the for loop

// set window properties
SetWindowTitle( "test" )
SetWindowSize( 1024, 768, 0 )
SetWindowAllowResize( 1 ) // allow the user to resize the window

// set display properties
SetVirtualResolution( 1024, 768 ) // doesn't have to match the window
SetOrientationAllowed( 1, 1, 1, 1 ) // allow both portrait and landscape on mobile devices
SetSyncRate( 30, 0 ) // 30fps instead of 60 to save battery
SetScissor( 0,0,0,0 ) // use the maximum available screen space, no black borders
UseNewDefaultFonts( 1 ) // since version 2.0.22 we can use nicer default fonts

SetVirtualResolution ( 1024, 768 )
 
 
CreateImageColor(1, 255, 255, 255, 255 )
 
    radius# = 25.0
       
for angle# = 0 to 360 step .1
    angle# = angle#
     i = CreateSprite( 1 )
     SetSpriteSize ( i, 5, 5 )
     thetaX# = sin(angle#)
     thetaY# = cos(angle#)
     x# = 512.0+radius#*thetaX#
     y# = 384.0-radius#*thetaY#
     SetSpritePosition( i, x#, y# )
 
next angle#
 
do
     print(thetaX#)
     print(thetay#)
     
    sync()
 
loop

do

Print( ScreenFPS() )
    Sync()
loop

+ Code Snippet


// set window properties
SetWindowTitle( "test" )
SetWindowSize( 1024, 768, 0 )
SetWindowAllowResize( 1 ) // allow the user to resize the window

// set display properties
SetVirtualResolution( 1024, 768 ) // doesn't have to match the window
SetOrientationAllowed( 1, 1, 1, 1 ) // allow both portrait and landscape on mobile devices
SetSyncRate( 30, 0 ) // 30fps instead of 60 to save battery
SetScissor( 0,0,0,0 ) // use the maximum available screen space, no black borders
UseNewDefaultFonts( 1 ) // since version 2.0.22 we can use nicer default fonts

SetVirtualResolution ( 1024, 768 )
 
 
CreateImageColor(1, 255, 255, 255, 255 )
 
    radius# = 25.0
       
for angle# = 0 to 360 step .1
    angle# = angle#
     i = CreateSprite( 1 )
     SetSpriteSize ( i, 5, 5 )
     thetaX# = sin(angle#)
     thetaY# = cos(angle#)
     x# = 512.0+radius#*thetaX#
     y# = 384.0-radius#*thetaY#
     SetSpritePosition( i, x#, y# )
 
next angle#
 
do
     print(thetaX#)
     print(thetay#)
     
    sync()
 
loop

do
    

    Print( ScreenFPS() )
    Sync()
loop

EDIT: then this will create a memory leak cause of having hundreds of sprites created, why not use a multiple ofDrawEllipse to create a circle and the getimage into a createsprite

Unsure how? - let us know and we can advise you

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Golelorn

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Joined: 20th Nov 2016

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Posted: 12th Apr 2018 19:15 Edited at: 12th Apr 2018 19:18

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I am attempting to make a circular "progress" bar, so I do not believe drawellipse will work. But perhaps something similar... I will test that out.

I want to have only 1 sprite, but I do not know how to do that. I tried messing with the creatememblockfromimage, but I can't figure it out.

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Golelorn

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Posted: 12th Apr 2018 19:30 Edited at: 12th Apr 2018 19:33

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OK very cool. I will work on figuring out how to turn it into a sprite. Thanks for the guidance!

+ Code Snippet

do
print( GetManagedSpriteCount() )
for angle = 0 to 360
	for o = -3 to 0
		angle# = angle/1
		thetaX# = sin(angle#)
		thetaY# = cos(angle#)
		previousx# = x#
		previousy# = y#
		x# = 512.0+(radius#+o)*thetaX#
		y# = 384.0-(radius#+o)*thetaY#
		DrawLine( previousx#, previousy#, x#, y#, 255, 255, 255 )
	next o
next angle
	sync()

loop

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puzzler2018

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Posted: 12th Apr 2018 19:31

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how about a createsprite to create the box
resize the sprite to say .1 x 1 to create rectangle

for loop the rectangle round the circlular way with setspriteangle

and then colour each sprite with the progress bar look and feel

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puzzler2018

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Posted: 12th Apr 2018 19:34

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// Project: gole 
// Created: 2018-04-12

// show all errors
SetErrorMode(2)

// set window properties
SetWindowTitle( "gole" )
SetWindowSize( 1024, 768, 0 )
SetWindowAllowResize( 1 ) // allow the user to resize the window

// set display properties
SetVirtualResolution( 1024, 768 ) // doesn't have to match the window
SetOrientationAllowed( 1, 1, 1, 1 ) // allow both portrait and landscape on mobile devices
SetSyncRate( 30, 0 ) // 30fps instead of 60 to save battery
SetScissor( 0,0,0,0 ) // use the maximum available screen space, no black borders
UseNewDefaultFonts( 1 ) // since version 2.0.22 we can use nicer default fonts

SetVirtualResolution ( 1024, 768 )
 
 
CreateImageColor(1, 255, 255, 255, 255 )
 
    radius# = 25.0
       
for angle# = 0 to 360 step .05
    
     i = CreateSprite( 1 )
     SetSpriteSize ( i, 1, 5 )
     SetSpriteColor( i, 0,0,angle#,255)
     thetaX# = sin(angle#)
     thetaY# = cos(angle#)
     x# = 512.0+radius#*thetaX#
     y# = 384.0-radius#*thetaY#
     SetSpritePosition( i, x#, y# )
     SetSpriteAngle(i, angle#)
 
next angle#
 
do
     print(thetaX#)
     print(thetay#)
     
    sync()
 
loop

do

Print( ScreenFPS() )
    Sync()
loop

+ Code Snippet


// Project: gole 
// Created: 2018-04-12

// show all errors
SetErrorMode(2)

// set window properties
SetWindowTitle( "gole" )
SetWindowSize( 1024, 768, 0 )
SetWindowAllowResize( 1 ) // allow the user to resize the window

// set display properties
SetVirtualResolution( 1024, 768 ) // doesn't have to match the window
SetOrientationAllowed( 1, 1, 1, 1 ) // allow both portrait and landscape on mobile devices
SetSyncRate( 30, 0 ) // 30fps instead of 60 to save battery
SetScissor( 0,0,0,0 ) // use the maximum available screen space, no black borders
UseNewDefaultFonts( 1 ) // since version 2.0.22 we can use nicer default fonts

SetVirtualResolution ( 1024, 768 )
 
 
CreateImageColor(1, 255, 255, 255, 255 )
 
    radius# = 25.0
       
for angle# = 0 to 360 step .05
    
     i = CreateSprite( 1 )
     SetSpriteSize ( i, 1, 5 )
     SetSpriteColor( i, 0,0,angle#,255)
     thetaX# = sin(angle#)
     thetaY# = cos(angle#)
     x# = 512.0+radius#*thetaX#
     y# = 384.0-radius#*thetaY#
     SetSpritePosition( i, x#, y# )
     SetSpriteAngle(i, angle#)
 
next angle#
 
do
     print(thetaX#)
     print(thetay#)
     
    sync()
 
loop

do
    

    Print( ScreenFPS() )
    Sync()
loop

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Golelorn

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Joined: 20th Nov 2016

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Posted: 12th Apr 2018 19:46 Edited at: 12th Apr 2018 19:47

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This does the trick with only one sprite created! Thanks so much puzzlr

+ Code Snippet

for angle = 0 to 360
	for o = -3 to 0
		angle# = angle/1
		thetaX# = sin(angle#)
		thetaY# = cos(angle#)
		previousx# = x#
		previousy# = y#
		x# = 512.0+(radius#+o)*thetaX#
		y# = 384.0-(radius#+o)*thetaY#
		DrawLine( previousx#, previousy#, x#, y#, 255, 255, 255 )
	next o
next angle
render()
cp = GetImage(487, 359, 60, 60 )

cps = CreateSprite( cp )
SetSpritePosition( cps, 512, 384 )

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puzzler2018

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Posted: 12th Apr 2018 19:47

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Well done

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Golelorn

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Posted: 12th Apr 2018 21:32

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Ugh, of course, on my laptop it works perfect. But on my mobile the sprite is about 3 X bigger... Anyone have any ideas?

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puzzler2018

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Posted: 12th Apr 2018 21:33

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try my last demo

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