Create an overlay which shows a grid

[kaputtnik]

In editor it is sometimes useful to have a grid shown. The grid should show the triangles of the fields and should be toggled with a shortcut and/or a button.

Attached is a mockup how this grid could be shown. May a different color should be used.

See: https://wl.widelands.org/forum/topic/1883/

[Benedikt Straub (nordfriese)]

Which colour would you like to have for the grid?

[kaputtnik (franku)]

Hm... difficult to say... Have you tried a grayish color?

Where is the color defined, so i can play around with some colors?

[Benedikt Straub (nordfriese)]

The colour is set in data/shaders/grid.fp. The parameters are floating point values in the order RGBA.

I tried out a few colours so far. Dark gray and green are almost invisible on many terrains, and light gray or red are too glaring imho. I chose violet for now, but it´s not perfect…

[kaputtnik (franku)]

Hm, i think black is the best. Just because it adds no additional color and the contrast is good, imho. Problematic is showing the black grid on the Button. Maybe use white for the button?

The 2 images have the values from top to bottom:
gl_FragColor = vec4(.0, .0, 0., .6);
gl_FragColor = vec4(.9, .4, .1, .9);

[kaputtnik (franku)]

Hm, didn't tested Wasteland hills, but changing alpha from .6 to .8 will do the trick also for the terrain wasteland mountain1

[Benedikt Straub (nordfriese)]

OK, I set the grid colour to black. I made the button grayish, that looks similar to the grid and is properly visible.

[GunChleoc (gunchleoc)]

Have a look at Surface::draw_line_strip - I think we could get better quality using that method.

[GunChleoc (gunchleoc)]

Migrated to https://github.com/widelands/widelands/issues/2048