Hello SirVer:
Id like to move the 0.5 * line_width invariant in tesselate_line_strip out of
the loop.
(I tend to optimize all the code I see)
--
Hasi50
> Am 05.02.2016 um 20:19 schrieb SirVer <sir...@gmx.de>:
>
> If you want to play around a little bit more, go for it. I will not code
> anymore tonight, so I will only clean this up tomorrow anyways. There are the
> parameters you can play with
>
> - In the last commit I removed the code that draws the circles to connect to
> lines, so lines are not connected anymore. You might bring that back.
> - the fuzzyness of the lines is defined through this line:
> float alpha = pow(cos(var_color.a * PI / 2), 1.5);
> the corners of each line quad are alpha = 1, opposite are -1, so the shader
> gets a linear interpolated value between -1 and 1 across the line. This
> function turns that into a non linear function that defines the falloff. You
> can replace that or tweak the 1.5 to different values you like.
> - glDepthFunction(GL_LEQUAL) vs glDepthFunction(GL_LESS) defines overdraw
> behavior for overlapping lines. If two lines overlap, it defines if the
> second lines pixel are drawn over the first line pixels or not - that
> obviously only makes a difference if the pixel is partially transparent.
> - The thickness of the lines in the plot area.
>
> It might help to bring back this line in graphic:
>
> screen_->draw_line_strip(
> {FloatPoint(20, 300), FloatPoint(700, 500), FloatPoint(250,
> 50)}, RGBColor(255, 0, 0), 30, LineDrawMode::kAntialiased);
>
> directly before:
> RenderQueue::instance().draw(screen_->width(), screen_->height());
>
> It draws a big fat line across your screen that is much bigger than any we
> use in Widelands, but it gives you a feeling for your parameters.
>
> It is fun to play around with that, but I did it too much now. Maybe you find
> better parameters.
> --
> https://code.launchpad.net/~widelands-dev/widelands/beautiful_correct_lines/+merge/284517
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