Heightmap problems

Troubleshooting General Help
1

I have problem with heightmaps.

Example heightmaps that comes with sdk, works fine (mountains*.png, etc), but if I create my own, it is just a plane.

And if I open ie mountains512.png, save it and try to use that heightmap, it is just a plane (no errors on log).



I tested ms paint, paint.net, and Artweaver Free 3.0, and didnt got heightmaps to work.



And if I save heightmap.jpg , I got

java.lang.UnsupportedOperationException: Image format: BGR8



What program I should use to create heightmap image?





And when tried using terrain-demo in my Android phone, I got exceptions

when using sdk heightmaps (ie Textures/Terrain/splat/fortress512.png ) :



I/MaterialDef( 3316): INFO MaterialDef 18.03.39 Loaded material definition: Terrain

W/System.err( 3316): java.lang.UnsupportedOperationException: Image format: RGB565

W/System.err( 3316): at com.jme3.terrain.heightmap.ImageBasedHeightMap.getHeightAtPostion(ImageBasedHeightMap.java:170)

W/System.err( 3316): at com.jme3.terrain.heightmap.ImageBasedHeightMap.load(ImageBasedHeightMap.java:135)

W/System.err( 3316): at com.jme3.terrain.heightmap.ImageBasedHeightMap.load(ImageBasedHeightMap.java:83)

W/System.err( 3316): at mygame.Main.simpleInitApp(Main.java:112)

W/System.err( 3316): at com.jme3.app.SimpleApplication.initialize(SimpleApplication.java:228)

W/System.err( 3316): at mygame.Main.initialize(Main.java:62)



So on android, I couldnt get terrain work at all.

2

Is your heightmap greyscale? I don’t know any of these programs but on gimp & photoshop its image - mode - greyscale. should be similar in any of these other programs.

1 Like
3

Installed GIMP and noticed that my heightmap was ‘indexed’, not grayscaled. Changed it and now .png and .jpg files works (on desktop), thanks.



I still have problems with android, that same Exception as above (RGB565 format) comes with my new heightmaps.

4

I’m sorry, I’ve never tried development for android, you would have to ask someone more experienced about that

5

Why don’t you upload your height & splat maps, and also your code. Maybe I or someone else could have a look.

6

Well, code was just the same terrain tutorial code, and I used images from sdk as well.



I think android converts images to RGB565 format when loading them, so I added

[java]

heightMapImage.getImage().setFormat(Format.Luminance8);

[/java]

after heightmap is loaded, to avoid exception.



But in ImageBasedHeightMap.java, line 108

[java]

ByteBuffer buf = colorImage.getData(0);

[/java]

on android, buf==null.



Some more testing, and added

[java]

// HEIGHTMAP image (for the terrain heightmap)

//Texture heightMapImage = assetManager.loadTexture("Textures/Terrain/splat/1.png");



Texture heightMapImage =new Texture2D(64,64, Format.Luminance8);

// create random terrain

ByteBuffer b = ByteBuffer.allocate(64 * 64);

for (int q = 0; q < 64 * 64; q++)

{

b.put((byte) ((q % 4) * ((q + 1) % 3)));

}

heightMapImage.getImage().setData(b);

[/java]



so instead of I load an image, I create 64x64 bitmap and fill it with some random values.

It works on android too,



So Texture.getImage().getData(0); does not work on android.