68 lines
1.8 KiB
HLSL
68 lines
1.8 KiB
HLSL
#ifndef UI_SOFTMASK_INCLUDED
|
|
#define UI_SOFTMASK_INCLUDED
|
|
|
|
sampler2D _SoftMaskTex;
|
|
float _Stencil;
|
|
float4x4 _GameVP;
|
|
float4x4 _GameTVP;
|
|
half4 _MaskInteraction;
|
|
|
|
float CustomStep(float a, float x)
|
|
{
|
|
return x >= a;
|
|
}
|
|
|
|
fixed Approximately(float4x4 a, float4x4 b)
|
|
{
|
|
float4x4 d = a - b;
|
|
d = float4x4(
|
|
abs(d[0]),
|
|
abs(d[1]),
|
|
abs(d[2]),
|
|
abs(d[3])
|
|
);
|
|
|
|
return step(
|
|
max(d._m00,max(d._m01,max(d._m02,max(d._m03,
|
|
max(d._m10,max(d._m11,max(d._m12,max(d._m13,
|
|
max(d._m20,max(d._m21,max(d._m22,max(d._m23,
|
|
max(d._m30,max(d._m31,max(d._m32,d._m33))))))))))))))),
|
|
0.5);
|
|
}
|
|
|
|
#if SOFTMASK_EDITOR
|
|
float SoftMaskInternal(float4 clipPos, float4 wpos)
|
|
#else
|
|
float SoftMaskInternal(float4 clipPos)
|
|
#endif
|
|
{
|
|
half2 view = clipPos.xy/_ScreenParams.xy;
|
|
#if SOFTMASK_EDITOR
|
|
fixed isSceneView = 1 - Approximately(UNITY_MATRIX_VP, _GameVP);
|
|
float4 cpos = mul(_GameTVP, mul(UNITY_MATRIX_M, wpos));
|
|
view = lerp(view, cpos.xy / cpos.w * 0.5 + 0.5, isSceneView);
|
|
#if UNITY_UV_STARTS_AT_TOP
|
|
view.y = lerp(view.y, 1 - view.y, CustomStep(0, _ProjectionParams.x));
|
|
#endif
|
|
#elif UNITY_UV_STARTS_AT_TOP
|
|
view.y = lerp(view.y, 1 - view.y, CustomStep(0, _ProjectionParams.x));
|
|
#endif
|
|
|
|
fixed4 mask = tex2D(_SoftMaskTex, view);
|
|
half4 alpha = saturate(lerp(fixed4(1, 1, 1, 1), lerp(mask, 1 - mask, _MaskInteraction - 1), _MaskInteraction));
|
|
#if SOFTMASK_EDITOR
|
|
alpha *= CustomStep(0, view.x) * CustomStep(view.x, 1) * CustomStep(0, view.y) * CustomStep(view.y, 1);
|
|
#endif
|
|
|
|
return alpha.x * alpha.y * alpha.z * alpha.w;
|
|
}
|
|
|
|
#if SOFTMASK_EDITOR
|
|
#define SOFTMASK_EDITOR_ONLY(x) x
|
|
#define SoftMask(clipPos, worldPosition) SoftMaskInternal(clipPos, worldPosition)
|
|
#else
|
|
#define SOFTMASK_EDITOR_ONLY(x)
|
|
#define SoftMask(clipPos, worldPosition) SoftMaskInternal(clipPos)
|
|
#endif
|
|
|
|
#endif // UI_SOFTMASK_INCLUDED |