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Simeon Radivoev 2022-02-12 12:53:50 +02:00
commit ee5c2f922d
Signed by: simeonradivoev
GPG key ID: 7611A451D2A5D37A
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113
Assets/Plugins/Light2D/Resources/Shaders/LightBase.cginc Normal file
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// Upgrade NOTE: replaced '_Object2World' with 'unity_ObjectToWorld'
// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
/*
Base code for standard light shaders.
Light is computed by path tracking with fixed number of steps (PATH_TRACKING_SAMPLES).
*/
#ifndef LIGHT_BASE_INCLUDED
#define LIGHT_BASE_INCLUDED
#pragma glsl_no_auto_normalization
struct light2d_fixed_data_t {
float4 vertex : POSITION;
float2 texcoord : TEXCOORD0;
float4 color : COLOR0;
float2 texcoord1 : TEXCOORD1;
};
struct light2d_fixed_v2f {
float4 vertex : SV_POSITION;
half2 texcoord : TEXCOORD0;
half4 color : COLOR0;
#ifdef PERSPECTIVE_CAMERA
half2 texcoord1 : TEXCOORD1;
float4 projVertex : COLOR1;
float zDistance : TEXCOORD2;
#else
half2 thisPos : TEXCOORD2;
half2 centerPos : TEXCOORD1;
#endif
half2 aspect : TEXCOORD3;
};
uniform sampler2D _ObstacleTex;
uniform sampler2D _MainTex;
uniform half _ObstacleMul;
uniform half _EmissionColorMul;
uniform float2 _ExtendedToSmallTextureScale;
#ifdef UNITY_HALF_TEXEL_OFFSET
uniform half2 _PosOffset;
#endif
light2d_fixed_v2f light2d_fixed_vert (light2d_fixed_data_t v)
{
light2d_fixed_v2f o;
o.vertex = UnityObjectToClipPos(v.vertex);
o.texcoord = v.texcoord;
#ifdef PERSPECTIVE_CAMERA
o.texcoord1 = v.texcoord1;
o.projVertex = o.vertex;
o.zDistance = mul(unity_ObjectToWorld, v.vertex).z;
#else
float4 vPos = ComputeScreenPos(o.vertex);
o.thisPos = (vPos.xy/vPos.w - 0.5)*_ExtendedToSmallTextureScale + 0.5;
float4 cPos = ComputeScreenPos(mul(UNITY_MATRIX_VP, float4(v.texcoord1, 0, 1)));
o.centerPos = (cPos.xy/cPos.w - 0.5)*_ExtendedToSmallTextureScale + 0.5;
#ifdef UNITY_HALF_TEXEL_OFFSET
o.thisPos += _PosOffset;
o.centerPos += _PosOffset;
#endif
#endif
o.color = v.color;
o.aspect = half2(_ScreenParams.x/_ScreenParams.y, 1);
return o;
}
half4 light2_fixed_frag (light2d_fixed_v2f i) : COLOR
{
half4 tex = tex2D(_MainTex, i.texcoord);
#ifdef PERSPECTIVE_CAMERA
half4 vPos = ComputeScreenPos(i.projVertex);
half2 thisPos = (vPos.xy/vPos.w - 0.5)*_ExtendedToSmallTextureScale + 0.5;
half4 cPos = ComputeScreenPos(mul(UNITY_MATRIX_VP, float4(i.texcoord1, i.zDistance, 1)));
half2 centerPos = (cPos.xy/cPos.w - 0.5)*_ExtendedToSmallTextureScale + 0.5;
#ifdef UNITY_HALF_TEXEL_OFFSET
thisPos += _PosOffset;
centerPos += _PosOffset;
#endif
#else
half2 thisPos = i.thisPos;
half2 centerPos = i.centerPos;
#endif
half sub = 1.0/PATH_TRACKING_SAMPLES;
half len = length((thisPos - centerPos)*i.aspect);
half m = _ObstacleMul*sub*len;
half4 col = i.color*tex*tex.a*i.color.a;
half pos = 0;
for(int i = 0; i < PATH_TRACKING_SAMPLES; i++)
{
pos += sub;
half4 obstacle = tex2D(_ObstacleTex, lerp(centerPos, thisPos, pos));
col *= saturate(1 - (1 - obstacle)*obstacle.a*m);
}
col.rgb *= _EmissionColorMul;
return col;//half4(half3((thisPos - centerPos).x*20), 1);//tex2D(_ObstacleTex, thisPos);
}
#endif