blob: 3abae3939a9798193e10b1fe603aec511587dfa3 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
#ifndef POI_ALPHA_TO_COVERAGE
#define POI_ALPHA_TO_COVERAGE
half _MainMipScale;
float _MainAlphaToCoverage;
float CalcMipLevel(float2 texture_coord)
{
float2 dx = ddx(texture_coord);
float2 dy = ddy(texture_coord);
float delta_max_sqr = max(dot(dx, dx), dot(dy, dy));
return 0.5 * log2(delta_max_sqr);
}
void ApplyAlphaToCoverage(inout float4 finalColor)
{
// Force Model Opacity to 1 if desired
UNITY_BRANCH
if (_Mode == 1)
{
UNITY_BRANCH
if(_MainAlphaToCoverage)
{
// rescale alpha by mip level
finalColor.a *= 1 + max(0, CalcMipLevel(poiMesh.uv[0] * _MainTex_TexelSize.zw)) * _MainMipScale;
// rescale alpha by partial derivative
finalColor.a = (finalColor.a - _Cutoff) / max(fwidth(finalColor.a), 0.0001) + _Cutoff;
}
}
}
#endif
|
