i think no understand this with render to image

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pamercomov

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Posted: 15th Jun 2020 15:30

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please...

i have this code

+ Code Snippet

function DrawMinimap()
    
    CreateRenderImage (1,160,120,0,0)
    playerx# = getobjectx(objID)
    playerz# = getobjectz(objID)
    playery# = getobjecty(objID)
    SetRenderToImage(1, 0)
     
    SetCameraPosition(1,playerx#,playery#+1000,playerz#)
    SetCameraLookAt(1,playerx#,playerx#,playerx#,0)
    render()
    
    SetSpriteImage(minimapa,1)
   
    SetRenderToScreen()
	ClearScreen()
	swap()
    SetCameraPosition(1,playerx#,playery#+camara_distancia,playerz#-80)

endfunction

I am trying to make a minimap.

I have read in the forum that we can only use one camera, so what I try is to place the camera, get that image and apply that image to a sprite that I have on screen ...

I know I'm doing something wrong because the sprite is always white and I can't get a single image ...

can you please indicate the steps in the correct order to be able to paint the sprite with the image obtained when recollecting the camera

very very very thx

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janbo

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Posted: 15th Jun 2020 19:09 Edited at: 15th Jun 2020 19:11

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In your example code i'd first recommend you to create the renderimage outside of the main loop, clear the screen before rendering the mipmap texture and also paste Render() after you set to render to the screen again or are you using sync() after your DrawMinimap() function ?
Then lets see what happens ...maybe post a screenshot and some code of your main loop ?

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Golelorn

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Posted: 16th Jun 2020 00:15 Edited at: 16th Jun 2020 00:22

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function DrawMinimap()
     
    CreateRenderImage (1,160,120,0,0) // this needs to be created outside the function or you're going to run into memory problems then just reuse the image 
    playerx# = getobjectx(objID)
    playerz# = getobjectz(objID)
    playery# = getobjecty(objID)
    SetRenderToImage(1, 0) //I believe this should be (1,-1)  the help file doesn't explain this well
    ClearScreen() //needs to be here
    SetCameraPosition(1,playerx#,playery#+1000,playerz#) // are you sure you want to place the camera 1000 units above the player?
    //need to get your original camera angle since its being changed if its always pointed at character then Im not sure the following command is needed - no need to recalculate the camera angle
    SetCameraLookAt(1,playerx#,playerx#,playerx#,0)
    render()
     
    SetSpriteImage(minimapa,1) // not needed if you've already set minimapa to use image 1
    
    SetRenderToScreen()
    ClearScreen() //possibly not needed - would need to see how you render the rest 
    swap() //possibly not needed - would need to see how you render the
    SetCameraPosition(1,playerx#,playery#+camara_distancia,playerz#-80)
    //need to get your original camera angle
 
endfunction)

+ Code Snippet


function DrawMinimap()
     
    CreateRenderImage (1,160,120,0,0) // this needs to be created outside the function or you're going to run into memory problems then just reuse the image 
    playerx# = getobjectx(objID)
    playerz# = getobjectz(objID)
    playery# = getobjecty(objID)
    SetRenderToImage(1, 0) //I believe this should be (1,-1)  the help file doesn't explain this well
    ClearScreen() //needs to be here
    SetCameraPosition(1,playerx#,playery#+1000,playerz#) // are you sure you want to place the camera 1000 units above the player?
    //need to get your original camera angle since its being changed if its always pointed at character then Im not sure the following command is needed - no need to recalculate the camera angle
    SetCameraLookAt(1,playerx#,playerx#,playerx#,0)
    render()
     
    SetSpriteImage(minimapa,1) // not needed if you've already set minimapa to use image 1
    
    SetRenderToScreen()
    ClearScreen() //possibly not needed - would need to see how you render the rest 
    swap() //possibly not needed - would need to see how you render the
    SetCameraPosition(1,playerx#,playery#+camara_distancia,playerz#-80)
    //need to get your original camera angle
 
endfunction)

I've added comments. I usually drawObjects() instead of render(), though. So, could still need refinement.

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pamercomov

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Posted: 16th Jun 2020 08:50

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Thank you very much .... this already works ... the problem is that it has the image that I get is of very poor quality .... I suppose that it has to see when rescaling the image to apply it to the sprite .... I have tried to create the image and the sprite of the same size so that it has not rescaled but it is all very very blurred and you can hardly distinguish anything. On the other hand, how can I set the camera so that the minimap works as an orthographic? maybe it would improve

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janbo

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Posted: 16th Jun 2020 08:58

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pamercomov wrote: "the problem is that it has the image that I get is of very poor quality"

The image you are rendering to is only 160*120 pixels so...

pamercomov wrote: "how can I set the camera so that the minimap works as an orthographic?"

SetCameraFOV( 1, 0 )

@Golelorn: SetRenderToImage(1, -1) is only needed if you are rendering a 3D scene and need the objects sorted in depth.

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pamercomov

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Posted: 16th Jun 2020 12:19 Edited at: 16th Jun 2020 17:28

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mmmm....
two other things that are happening now ...
If I use setcamerafov (1,0), it does not affect the distance I put from the camera and everything looks too close, a close-up.

afterwards, I have some particles that can be seen perfectly if I deactivate the minimap, but if I activate it they are square, as if they did not blend correctly ...

PS: how can I take a screenshot .... I tried the print screen button on the keyboard, so you could see what the particles are, but it captures all black

edit1: im trying this

+ Code Snippet

	if(  GetRawMouseLeftState()=1)
		render()
		image = GetImage(0,0,640,480)
		SaveImage( image , "withminimap.png" )

		
	endif

but nothing happens or I can't find the image in the middle folder
edit

Quote: "If I use setcamerafov (1,0), it does not affect the distance I put from the camera and everything looks too close, a close-up."

this is already understood and solved, with this

SetCameraFOV(1,0)
SetCameraOrthoWidth( 1, 480 )

missing to solve or know what happens to the particles

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pamercomov

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Posted: 16th Jun 2020 13:03

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I upload two examples for you to see, one with a minimap and the other without rendering the minimap, just change that ...
this is the function drawminimap

+ Code Snippet

function DrawMinimap()
    SetAmbientColor(80,80,80)
   
    playerx# = getobjectx(objID)
    playerz# = getobjectz(objID)
    playery# = getobjecty(objID)
    SetRenderToImage(1, -1) 
    ClearScreen()
    SetCameraPosition(1,playerx#,playery#+700,playerz#-150)?


    render()
      
    SetSpriteImage(minimapa,1) // not needed if you've already set minimapa to use image 1
    
    SetRenderToScreen()

    SetCameraPosition(1,playerx#,playery#+camara_distancia,playerz#-80)

	SetAmbientColor(0,0,0)
	
endfunction

and this is the loop

+ Code Snippet

do
	DrawMinimap()
	
	recoloca_caracter_camara(objID)
	controla_prota()
	orienta_enemigos()
	
	SetSpritePosition(minimapa,580,10)
	actualiza_balas()
	
	SetSpritePosition(puntero,GetPointerX()-GetSpriteWidth(puntero)/2,GetPointerY()-GetSpriteHeight(puntero)/2)
	if ( GetRawKeyPressed(27) ) then exit
	

    Print( ScreenFPS() )

    Sync()


loop

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pamercomov

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Posted: 17th Jun 2020 19:43

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I do not understand why the images that I upload are not seen

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ando

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Posted: 17th Jun 2020 21:48

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Hi, in your first post I see....

render()
SetSpriteImage(minimapa,1)

Maybe switch around...

SetSpriteImage(minimapa,1)
render()

Also I played with render texture in this project and maybe can help

https://forum.thegamecreators.com/thread/226343#msg2656245

I'm a time traveller from 40 years ago. You'll never guess how long it took to get here.

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ando

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Posted: 18th Jun 2020 01:53 Edited at: 20th Jun 2020 19:47

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I just made this as a test. Hope it helps.

// Project: minimap by ando
// Created: 20-06-18

width# = GetMaxDeviceWidth()
height# = GetMaxDeviceHeight()
SetWindowSize(width#,height#,1)
SetVirtualResolution(width#,height#)
SetSyncRate(30,0)
SetScissor(0,0,0,0)
UseNewDefaultFonts(1)
SetGenerateMipmaps(1)
SetAmbientColor(100,100,100)

//  xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx   TERRAIN

terrain=CreateObjectPlane(1000,1000)
terraintex=LoadImage("dirt5.png")
SetObjectImage(terrain,terraintex,0)
SetObjectUVScale(terrain,0,50,50)
SetImageWrapU(terraintex,1)
SetImageWrapV(terraintex,1)
RotateObjectLocalX(terrain,90)

//  xxxxxxxxxxxxxxxxxxxx   CAMERA and PLAYER SPHERE

cam=1
SetCameraRange(cam,0.5,10000)
SetCameraRotation(cam,0,0,0)
camAngleX#=0

player=CreateObjectsphere(20,6,12)
SetObjectposition(player,0,6,0)
SetObjectColor(player,25,25,25,255)

//xxxxxxxxxxxxxxxxxxxxxxxxxxxx

ball=CreateObjectsphere(40,6,12)
SetObjectposition(ball,0,10,480)
SetObjectColor(ball,255,50,50,255)

ball2=CreateObjectsphere(40,6,12)
SetObjectposition(ball2,0,10,-480)
SetObjectColor(ball2,50,50,255,255)

ball3=CreateObjectsphere(40,6,12)
SetObjectposition(ball3,-480,10,0)
SetObjectColor(ball3,50,255,50,255)

ball4=CreateObjectsphere(40,6,12)
SetObjectposition(ball4,480,10,0)
SetObjectColor(ball4,50,255,50,255)

//xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

rendertex=CreateRenderImage(512,512,0,1)
rendersprite=CreateSprite(rendertex)
SetSpriteSize(rendersprite,height#/3,height#/3)
SetSpritePosition(rendersprite,0,height#-GetSpriteHeight(rendersprite))

//xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

arrow=CreateObjectPlane(100,100)
arrowtex=LoadImage("arrowup.png")
SetObjectImage(arrow,arrowtex,0)
SetObjectAlphaMask(arrow,1)
SetObjectPosition(arrow,0,5,0)

//xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
setrawmousevisible(0)
SetRawMousePosition(width#/2,height#/2)

do
    
    //   xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx render to texture
    
    SetRenderToImage(rendertex,-1)
    
    setspritevisible(rendersprite,0)
    SetObjectVisible(arrow,1)
    
    SetCameraPosition(cam,GetObjectX(terrain),GetObjectY(terrain)+GetObjectSizeMaxX(terrain)*1.45,GetObjectZ(terrain))
    SetCameraRotation(cam,90,0,0)
    SetCameraAspect(cam,1)
    
    ClearScreen()
    SetSpriteImage(rendersprite,rendertex,0)
    Render()
    
    //  xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx  set render to main screen
    
    SetRenderToScreen()
    
    SetCameraAspect(cam,width#/height#)
    setspritevisible(rendersprite,1)
    SetObjectVisible(arrow,0)
    SetCameraRotation(cam,camAngleX#,GetObjectAngleY(player),0)
    
    //  xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
    
    mouseX# = (GetRawMouseX()-width#/2)*0.2
    mouseY# = (GetRawMouseY()-height#/2)*0.2
    
    RotateCameraLocalX(cam,mouseY#)
    camAngleX#=GetCameraAngleX(cam)
    RotateObjectLocalY(player,mouseX#)
    SetCameraRotation(cam,camAngleX#,GetObjectAngleY(player),0)
    If GetCameraAngleX(cam)>80 Then SetCameraRotation(cam,80,GetCameraAngleY(cam),0)
    If GetCameraAngleX(cam)<-80 Then SetCameraRotation(cam,-80,GetCameraAngleY(cam),0)
    SetCameraPosition(cam,GetObjectX(player),GetObjectY(player)+3,GetObjectZ(player))
    SetObjectPosition(arrow,GetObjectX(player),GetObjectY(player)+3,GetObjectZ(player))
    SetObjectRotation(arrow,90,GetObjectAngleY(player),0)
    
    if GetRawMouseLeftState()
        MoveObjectLocalZ(player,2)
    endif
    if GetRawMouseRightState()
        MoveObjectLocalZ(player,-2)
    endif
    
    //    xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
    
    SetRawMousePosition(width#/2,height#/2)
    
    
    framerate=ScreenFPS()
    Print(framerate)
    Print("use mouse")
    Sync()
    if GetrawKeyPressed(27) then exit
loop

+ Code Snippet

// Project: minimap by ando
// Created: 20-06-18

width# = GetMaxDeviceWidth()
height# = GetMaxDeviceHeight()
SetWindowSize(width#,height#,1)
SetVirtualResolution(width#,height#)
SetSyncRate(30,0)
SetScissor(0,0,0,0)
UseNewDefaultFonts(1)
SetGenerateMipmaps(1)
SetAmbientColor(100,100,100)

//  xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx   TERRAIN

terrain=CreateObjectPlane(1000,1000)
terraintex=LoadImage("dirt5.png")
SetObjectImage(terrain,terraintex,0)
SetObjectUVScale(terrain,0,50,50)
SetImageWrapU(terraintex,1)
SetImageWrapV(terraintex,1)
RotateObjectLocalX(terrain,90)

//  xxxxxxxxxxxxxxxxxxxx   CAMERA and PLAYER SPHERE

cam=1
SetCameraRange(cam,0.5,10000)
SetCameraRotation(cam,0,0,0)
camAngleX#=0

player=CreateObjectsphere(20,6,12)
SetObjectposition(player,0,6,0)
SetObjectColor(player,25,25,25,255)

//xxxxxxxxxxxxxxxxxxxxxxxxxxxx

ball=CreateObjectsphere(40,6,12)
SetObjectposition(ball,0,10,480)
SetObjectColor(ball,255,50,50,255)

ball2=CreateObjectsphere(40,6,12)
SetObjectposition(ball2,0,10,-480)
SetObjectColor(ball2,50,50,255,255)

ball3=CreateObjectsphere(40,6,12)
SetObjectposition(ball3,-480,10,0)
SetObjectColor(ball3,50,255,50,255)

ball4=CreateObjectsphere(40,6,12)
SetObjectposition(ball4,480,10,0)
SetObjectColor(ball4,50,255,50,255)

//xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

rendertex=CreateRenderImage(512,512,0,1)
rendersprite=CreateSprite(rendertex)
SetSpriteSize(rendersprite,height#/3,height#/3)
SetSpritePosition(rendersprite,0,height#-GetSpriteHeight(rendersprite))

//xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

arrow=CreateObjectPlane(100,100)
arrowtex=LoadImage("arrowup.png")
SetObjectImage(arrow,arrowtex,0)
SetObjectAlphaMask(arrow,1)
SetObjectPosition(arrow,0,5,0)

//xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
setrawmousevisible(0)
SetRawMousePosition(width#/2,height#/2)

do
    
    //   xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx render to texture
    
    SetRenderToImage(rendertex,-1)
    
    setspritevisible(rendersprite,0)
    SetObjectVisible(arrow,1)
    
    SetCameraPosition(cam,GetObjectX(terrain),GetObjectY(terrain)+GetObjectSizeMaxX(terrain)*1.45,GetObjectZ(terrain))
    SetCameraRotation(cam,90,0,0)
    SetCameraAspect(cam,1)
    
    ClearScreen()
    SetSpriteImage(rendersprite,rendertex,0)
    Render()
    
    //  xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx  set render to main screen
    
    SetRenderToScreen()
    
    SetCameraAspect(cam,width#/height#)
    setspritevisible(rendersprite,1)
    SetObjectVisible(arrow,0)
    SetCameraRotation(cam,camAngleX#,GetObjectAngleY(player),0)
    
    //  xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
    
    mouseX# = (GetRawMouseX()-width#/2)*0.2
    mouseY# = (GetRawMouseY()-height#/2)*0.2
    
    RotateCameraLocalX(cam,mouseY#)
    camAngleX#=GetCameraAngleX(cam)
    RotateObjectLocalY(player,mouseX#)
    SetCameraRotation(cam,camAngleX#,GetObjectAngleY(player),0)
    If GetCameraAngleX(cam)>80 Then SetCameraRotation(cam,80,GetCameraAngleY(cam),0)
    If GetCameraAngleX(cam)<-80 Then SetCameraRotation(cam,-80,GetCameraAngleY(cam),0)
    SetCameraPosition(cam,GetObjectX(player),GetObjectY(player)+3,GetObjectZ(player))
    SetObjectPosition(arrow,GetObjectX(player),GetObjectY(player)+3,GetObjectZ(player))
    SetObjectRotation(arrow,90,GetObjectAngleY(player),0)
    
    if GetRawMouseLeftState()
        MoveObjectLocalZ(player,2)
    endif
    if GetRawMouseRightState()
        MoveObjectLocalZ(player,-2)
    endif
    
    //    xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
    
    SetRawMousePosition(width#/2,height#/2)
    
    
    framerate=ScreenFPS()
    Print(framerate)
    Print("use mouse")
    Sync()
    if GetrawKeyPressed(27) then exit
loop

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pamercomov

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Posted: 19th Jun 2020 11:09 Edited at: 19th Jun 2020 11:09

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thanks, seeing your example code I have fixed the minimap and at the same time the one that arose from the particles, I was erroneously assigning the id but this is it ..... thank you very much.
this community has been and continues to be spectacular with newbies

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Golelorn

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Posted: 19th Jun 2020 23:09

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Quote: "@Golelorn: SetRenderToImage(1, -1) is only needed if you are rendering a 3D scene and need the objects sorted in depth."

OK, I really have to laugh at myself. I always thought that had to do with a depth map. Not 3d drawing, which is what I am assuming you mean.

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janbo

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Posted: 20th Jun 2020 19:17

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It does have to do with depth maps but -1 takes a depth map generated and managed by AGK. And for 2D you dont need depth maps obviously...thats all

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AppGameKit Classic Chat / i think no understand this with render to image

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