How to make this work under orthogonal camera?

[lee12321]

Have tried to make some change in the code, but failed to get the foam right under orthogonal camera.

[vadermemo]

same here, bro. Any tip for us?

[udvaritibor]

Same here. Tried removing linearizing, etc, but messed up everything :D

[udvaritibor]

@lee12321 @vadermemo

I've managed to convert it partially.

Instead of always linearizing it (as it should be with a perspective camera):

float existingDepthLinear = LinearEyeDepth(existingDepth01);

Replace it with:

float existingDepthLinear = 0;

if (unity_OrthoParams.w > 0)
{
	// orthographic camera
#if defined(UNITY_REVERSED_Z)
	existingDepth01 = 1.0f - existingDepth01;
#endif
	existingDepthLinear = (existingDepth01 * _ProjectionParams.z) + _ProjectionParams.y;
}
else
{
	// perspective camera
	existingDepthLinear = LinearEyeDepth(existingDepth01);
}

Also, in Orthographic view, we can't use screenPosition.w, so in:

v2f vert (appdata v)
{
 	...
}

Insert this, so we will have a computed depth:

COMPUTE_EYEDEPTH(o.screenPosition.z);

And replace

float depthDifference = existingDepthLinear - i.screenPosition.w;

with:

float depthDifference = existingDepthLinear - i.screenPosition.z;

Cheers! :)

[udvaritibor]

@lee12321 @vadermemo I updated my code, because it had a bug.

On machines without REVERSED_Z it always had a depth of 0 due to some typo.