Strange shadow when transparent about xbpagecurl HOT 10 CLOSED

Is it also possible to change the shadow color?

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The current shadow algorithm is a simple one that assumes an opaque page. A
new, more complex algorithm must be implemented in order to generate proper
shadows for transparent views. I have been thinking about it. Ideas are
always welcome.

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Okey, I'm too novice for that, but I can try :P where in the code should i look?
If I fail, is it possible to remove the shadow?

Edit: Got an idea... maybe if the shadow is an image wich gets the same height, angle and position as the curl, not an ideal solution but maybe a quick fix?

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I still didn't implement a method to disable the shadows. What you can do
is to, in the NextPageNoTextureFragmentShader.glsl, change the main
function to this:

void main() { gl_FragColor = vec4(0.0, 0.0, 0.0, 0.0); }

Just a quick and dirty workaround..

The problem with transparent views is that the shadow should have the same shape as the alpha of the view. We could use some sort of shadow mapping algorithm.

There's not yet a direct way to change the color of the shadow, but its possible to do so by changing the rgb of the color that is returned in the fragment shader, like gl_FragColor = vec4(0.8123,0.14, 0.59, l).

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Thank you :)

I'll read up on shadow mapping and glsl and see if I can come up with something.

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I made a quick try and got a somewhat satisfactory result
if (d < 2.0_u_cylinderRadius) {
float a = (d/(2.0_u_cylinderRadius))_M_PI;
l = (d + 1.0)_0.5;
}

gl_FragColor = vec4(0.0, 0.0, 0.0, l);

it is not repeated all over the screen, but it is a solid shadow.

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Ah I see, you're drawing a linear instead of a cosine shadow. Yea, it should work.

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Yeah. the problem is to get it faded, I managed to get it faded one direction, now I'm trying to figure out how to flip the shadow 180°

if (d < 2.0_u_cylinderRadius) {
float a = (d_(1.0/u_cylinderRadius))/M_PI;
//l = (cos(a)+1.0)_0.5;
l = (a)_0.5;
}

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Try l = d > 0.0? 1.0 - d/(2.0*u_cylinderRadius): 0.0;

On Tue, Nov 1, 2011 at 11:33 AM, Jerhammar <
[email protected]>wrote:

Yeah. the problem is to get it faded, i managed to get it faded one way
now im trying to figure out how to flip the shadow 180

if (d < 2.0_u_cylinderRadius) {
float a = (d_(1.0/u_cylinderRadius))/M_PI;
//l = (cos(a)+1.0)_0.5;
l = (a)_0.5;
}

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#13 (comment)

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Thanx, worked perfectly!

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