Issues creating own map style

[hhornburg]

I am creating my own map style (see https://github.com/hhornburg/osmand-bikepacking).
When I test things with OsmAndMapCreator everything works fine, but once I load it in the app I get strange effects.

Rendering version 1

Once I move the map the previous rendering still shines through where there is no polygon defined:

Rendering Version 2 (OpenGL)

No lines are displayed

Can anyone hint me to what I'm doing wrong in bikepacking.render.xml?
Thanks in advance!

[vshcherb]

Your style is quite complex already to dig into quickly. Probably you can start assigning https://github.com/hhornburg/osmand-bikepacking/blob/main/bikepacking.render.xml#L632 strokeWidth constant and color instead of evaluated attributes. Also please check strokeWidth_1, color_1 - though if strokeWidth is 0 then line won't be displayed.
I didn't find any specific issue

[hhornburg]

I also noticed that the assigning of the strokeWidth in the renderAttribute (e.g. in https://github.com/hhornburg/osmand-bikepacking/blob/49e8f9b129be466f975f7c6097a5ee0519dc5133/bikepacking.render.xml#L106) stops working once I add the following snippet:

    <renderingAttribute name="shadowRendering">
        <!-- 0 - no shadow, 1 - one step, 2 - blur shadow, 3 - solid shadow -->
        <case attrIntValue="3"/>
    </renderingAttribute>

I assume assigning the width via side-effect was never the intended way to go, but using attrFloatValue in the renderAttribute had no effect in OsmAndMapCreator.

Is this an issue of OsmAndMapCreator, so I have to copy over each style to the device to test it or is there a some renderAttribute (like shadowRendering) missing that changes settings for the renderer?

TBH I'm pretty puzzled due to the lack of documentation (that I found at least) on what the 'correct' way regarding the writing of a rendering style is.

[vshcherb]

I think it's correct way you do but noone knows did you encounter a bug or you made a typo somewhere instead of 1 -> 1.1 and opengl engine doesn't like float numbers somewhere or something like that. Though I believe width could be float, at least it should support syntax "4:2"

[hhornburg]

I created a repo where I tested the different combinations: https://github.com/hhornburg/osmand-rendertests/tree/main/shadowRendering

My result is: set both attrFloatValue and attrIntValue in a renderingAttribute to have identical output for the strokeWidth in the app and the map creator. Don't use Renderer Version 1 in the app.