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OvertakingLegend/Assets/Amazing Assets/Curved World/Shaders/Built-In/Particles/UnityStandardParticles.cginc

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// Curved World <http://u3d.as/1W8h>
// Copyright (c) Amazing Assets <https://amazingassets.world>
#ifndef UNITY_STANDARD_PARTICLES_INCLUDED
#define UNITY_STANDARD_PARTICLES_INCLUDED
#if _REQUIRE_UV2
#define _FLIPBOOK_BLENDING 1
#endif
#if EFFECT_BUMP
#define _DISTORTION_ON 1
#endif
#include "HLSLSupport.cginc"
#include "UnityPBSLighting.cginc"
#include "UnityStandardParticleInstancing.cginc"
#include "../../Core/CurvedWorldTransform.cginc"
// Particles surface shader has a lot of variants in it, but some of those do not affect
// code generation (i.e. don't have inpact on which Input/SurfaceOutput things are read or written into).
// Surface shader analysis done during import time skips "completely identical" shader variants, so to
// help this process we'll turn off some features that we know are not affecting the inputs/outputs.
//
// If you change the logic of what the below variants do, make sure to not regress code generation though,
// e.g. compare full "show generated code" output of the surface shader before & after the change.
#if defined(SHADER_TARGET_SURFACE_ANALYSIS)
// All these only alter the color in various ways
#undef _COLOROVERLAY_ON
#undef _COLORCOLOR_ON
#undef _COLORADDSUBDIFF_ON
#undef _ALPHAMODULATE_ON
#undef _ALPHATEST_ON
// For inputs/outputs analysis SoftParticles and Fading are identical; so make sure to only keep one
// of them ever defined.
#if defined(SOFTPARTICLES_ON)
#undef SOFTPARTICLES_ON
#define _FADING_ON
#endif
#endif
// Vertex shader input
struct appdata_particles
{
float4 vertex : POSITION;
float3 normal : NORMAL;
fixed4 color : COLOR;
#if defined(_FLIPBOOK_BLENDING) && !defined(UNITY_PARTICLE_INSTANCING_ENABLED)
float4 texcoords : TEXCOORD0;
float texcoordBlend : TEXCOORD1;
#else
float2 texcoords : TEXCOORD0;
#endif
float4 tangent : TANGENT;
UNITY_VERTEX_INPUT_INSTANCE_ID
};
// Surface shader input
struct Input
{
float4 color : COLOR;
float2 texcoord;
#if defined(_FLIPBOOK_BLENDING)
float3 texcoord2AndBlend;
#endif
#if defined(SOFTPARTICLES_ON) || defined(_FADING_ON)
float4 projectedPosition;
#endif
#if _DISTORTION_ON
float4 grabPassPosition;
#endif
};
// Non-surface shader v2f structure
struct VertexOutput
{
float4 vertex : SV_POSITION;
float4 color : COLOR;
UNITY_FOG_COORDS(0)
float2 texcoord : TEXCOORD1;
#if defined(_FLIPBOOK_BLENDING)
float3 texcoord2AndBlend : TEXCOORD2;
#endif
#if defined(SOFTPARTICLES_ON) || defined(_FADING_ON)
float4 projectedPosition : TEXCOORD3;
#endif
#if _DISTORTION_ON
float4 grabPassPosition : TEXCOORD4;
#endif
UNITY_VERTEX_OUTPUT_STEREO
};
fixed4 readTexture(sampler2D tex, Input IN)
{
fixed4 color = tex2D (tex, IN.texcoord);
#ifdef _FLIPBOOK_BLENDING
fixed4 color2 = tex2D(tex, IN.texcoord2AndBlend.xy);
color = lerp(color, color2, IN.texcoord2AndBlend.z);
#endif
return color;
}
fixed4 readTexture(sampler2D tex, VertexOutput IN)
{
fixed4 color = tex2D (tex, IN.texcoord);
#ifdef _FLIPBOOK_BLENDING
fixed4 color2 = tex2D(tex, IN.texcoord2AndBlend.xy);
color = lerp(color, color2, IN.texcoord2AndBlend.z);
#endif
return color;
}
sampler2D _MainTex;
float4 _MainTex_ST;
half4 _Color;
sampler2D _BumpMap;
half _BumpScale;
sampler2D _EmissionMap;
half3 _EmissionColor;
sampler2D _MetallicGlossMap;
half _Metallic;
half _Glossiness;
UNITY_DECLARE_DEPTH_TEXTURE(_CameraDepthTexture);
float4 _SoftParticleFadeParams;
float4 _CameraFadeParams;
half _Cutoff;
int _DstBlend;
#define SOFT_PARTICLE_NEAR_FADE _SoftParticleFadeParams.x
#define SOFT_PARTICLE_INV_FADE_DISTANCE _SoftParticleFadeParams.y
#define CAMERA_NEAR_FADE _CameraFadeParams.x
#define CAMERA_INV_FADE_DISTANCE _CameraFadeParams.y
#if (defined(UNITY_STEREO_INSTANCING_ENABLED) || defined(UNITY_STEREO_MULTIVIEW_ENABLED)) && !SHADER_TARGET_SURFACE_ANALYSIS
#define SampleGrabPassTexture(tex, t) UNITY_SAMPLE_SCREENSPACE_TEXTURE(tex, t.xy / t.w)
#else
#define SampleGrabPassTexture(tex, t) tex2Dproj(tex, t)
#endif
#if _DISTORTION_ON
#if SHADER_TARGET_SURFACE_ANALYSIS
sampler2D _GrabTexture;
#else
UNITY_DECLARE_SCREENSPACE_TEXTURE(_GrabTexture);
#endif
half _DistortionStrengthScaled;
half _DistortionBlend;
#endif
#if defined (_COLORADDSUBDIFF_ON)
half4 _ColorAddSubDiff;
#endif
#if defined(_COLORCOLOR_ON)
half3 RGBtoHSV(half3 arg1)
{
half4 K = half4(0.0, -1.0 / 3.0, 2.0 / 3.0, -1.0);
half4 P = lerp(half4(arg1.bg, K.wz), half4(arg1.gb, K.xy), step(arg1.b, arg1.g));
half4 Q = lerp(half4(P.xyw, arg1.r), half4(arg1.r, P.yzx), step(P.x, arg1.r));
half D = Q.x - min(Q.w, Q.y);
half E = 1e-4;
return half3(abs(Q.z + (Q.w - Q.y) / (6.0 * D + E)), D / (Q.x + E), Q.x);
}
half3 HSVtoRGB(half3 arg1)
{
half4 K = half4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);
half3 P = abs(frac(arg1.xxx + K.xyz) * 6.0 - K.www);
return arg1.z * lerp(K.xxx, saturate(P - K.xxx), arg1.y);
}
#endif
// Color function
#if defined(UNITY_PARTICLE_INSTANCING_ENABLED)
#define vertColor(c) \
vertInstancingColor(c);
#else
#define vertColor(c)
#endif
// Flipbook vertex function
#if defined(UNITY_PARTICLE_INSTANCING_ENABLED)
#if defined(_FLIPBOOK_BLENDING)
#define vertTexcoord(v, o) \
vertInstancingUVs(v.texcoords.xy, o.texcoord, o.texcoord2AndBlend);
#else
#define vertTexcoord(v, o) \
vertInstancingUVs(v.texcoords.xy, o.texcoord); \
o.texcoord = TRANSFORM_TEX(o.texcoord, _MainTex);
#endif
#else
#if defined(_FLIPBOOK_BLENDING)
#define vertTexcoord(v, o) \
o.texcoord = v.texcoords.xy; \
o.texcoord2AndBlend.xy = v.texcoords.zw; \
o.texcoord2AndBlend.z = v.texcoordBlend;
#else
#define vertTexcoord(v, o) \
o.texcoord = TRANSFORM_TEX(v.texcoords.xy, _MainTex);
#endif
#endif
// Fading vertex function
#if defined(SOFTPARTICLES_ON) || defined(_FADING_ON)
#define vertFading(o) \
o.projectedPosition = ComputeScreenPos (clipPosition); \
COMPUTE_EYEDEPTH(o.projectedPosition.z);
#else
#define vertFading(o)
#endif
// Distortion vertex function
#if _DISTORTION_ON
#define vertDistortion(o) \
o.grabPassPosition = ComputeGrabScreenPos (clipPosition);
#else
#define vertDistortion(o)
#endif
// Color blending fragment function
#if defined(_COLOROVERLAY_ON)
#define fragColorMode(i) \
albedo.rgb = lerp(1 - 2 * (1 - albedo.rgb) * (1 - i.color.rgb), 2 * albedo.rgb * i.color.rgb, step(albedo.rgb, 0.5)); \
albedo.a *= i.color.a;
#elif defined(_COLORCOLOR_ON)
#define fragColorMode(i) \
half3 aHSL = RGBtoHSV(albedo.rgb); \
half3 bHSL = RGBtoHSV(i.color.rgb); \
half3 rHSL = fixed3(bHSL.x, bHSL.y, aHSL.z); \
albedo = fixed4(HSVtoRGB(rHSL), albedo.a * i.color.a);
#elif defined(_COLORADDSUBDIFF_ON)
#define fragColorMode(i) \
albedo.rgb = albedo.rgb + i.color.rgb * _ColorAddSubDiff.x; \
albedo.rgb = lerp(albedo.rgb, abs(albedo.rgb), _ColorAddSubDiff.y); \
albedo.a *= i.color.a;
#else
#define fragColorMode(i) \
albedo *= i.color;
#endif
// Pre-multiplied alpha helper
#if defined(_ALPHAPREMULTIPLY_ON)
#define ALBEDO_MUL albedo
#else
#define ALBEDO_MUL albedo.a
#endif
// Soft particles fragment function
#if defined(SOFTPARTICLES_ON) && defined(_FADING_ON)
#define fragSoftParticles(i) \
float softParticlesFade = 1.0f; \
if (SOFT_PARTICLE_NEAR_FADE > 0.0 || SOFT_PARTICLE_INV_FADE_DISTANCE > 0.0) \
{ \
float sceneZ = LinearEyeDepth (SAMPLE_DEPTH_TEXTURE_PROJ(_CameraDepthTexture, UNITY_PROJ_COORD(i.projectedPosition))); \
softParticlesFade = saturate (SOFT_PARTICLE_INV_FADE_DISTANCE * ((sceneZ - SOFT_PARTICLE_NEAR_FADE) - i.projectedPosition.z)); \
ALBEDO_MUL *= softParticlesFade; \
}
#else
#define fragSoftParticles(i) \
float softParticlesFade = 1.0f;
#endif
// Camera fading fragment function
#if defined(_FADING_ON)
#define fragCameraFading(i) \
float cameraFade = saturate((i.projectedPosition.z - CAMERA_NEAR_FADE) * CAMERA_INV_FADE_DISTANCE); \
ALBEDO_MUL *= cameraFade;
#else
#define fragCameraFading(i) \
float cameraFade = 1.0f;
#endif
#if _DISTORTION_ON
#define fragDistortion(i) \
float4 grabPosUV = UNITY_PROJ_COORD(i.grabPassPosition); \
grabPosUV.xy += normal.xy * _DistortionStrengthScaled * albedo.a; \
half3 grabPass = SampleGrabPassTexture(_GrabTexture, grabPosUV).rgb; \
albedo.rgb = lerp(grabPass, albedo.rgb, saturate(albedo.a - _DistortionBlend));
#else
#define fragDistortion(i)
#endif
void vert (inout appdata_particles v, out Input o)
{
UNITY_INITIALIZE_OUTPUT(Input, o);
#if defined(CURVEDWORLD_IS_INSTALLED) && !defined(CURVEDWORLD_DISABLED_ON)
#ifdef CURVEDWORLD_NORMAL_TRANSFORMATION_ON
CURVEDWORLD_TRANSFORM_VERTEX_AND_NORMAL(v.vertex, v.normal, v.tangent)
#else
CURVEDWORLD_TRANSFORM_VERTEX(v.vertex)
#endif
#endif
float4 clipPosition = UnityObjectToClipPos(v.vertex);
vertColor(v.color);
vertTexcoord(v, o);
vertFading(o);
vertDistortion(o);
}
void surf (Input IN, inout SurfaceOutputStandard o)
{
half4 albedo = readTexture (_MainTex, IN);
albedo *= _Color;
fragColorMode(IN);
fragSoftParticles(IN);
fragCameraFading(IN);
#if defined(_METALLICGLOSSMAP)
fixed2 metallicGloss = readTexture (_MetallicGlossMap, IN).ra * fixed2(1.0, _Glossiness);
#else
fixed2 metallicGloss = fixed2(_Metallic, _Glossiness);
#endif
#if defined(_NORMALMAP)
float3 normal = normalize (UnpackScaleNormal (readTexture (_BumpMap, IN), _BumpScale));
#else
float3 normal = float3(0,0,1);
#endif
#if defined(_EMISSION)
half3 emission = readTexture (_EmissionMap, IN).rgb * cameraFade * softParticlesFade;
#else
half3 emission = 0;
#endif
fragDistortion(IN);
o.Albedo = albedo.rgb;
#if defined(_NORMALMAP)
o.Normal = normal;
#endif
o.Emission = emission * _EmissionColor;
o.Metallic = metallicGloss.r;
o.Smoothness = metallicGloss.g;
#if defined(_ALPHABLEND_ON) || defined(_ALPHAPREMULTIPLY_ON) || defined(_ALPHAOVERLAY_ON)
o.Alpha = albedo.a;
#else
o.Alpha = 1;
#endif
#if defined(_ALPHAMODULATE_ON)
o.Albedo = lerp(half3(1.0, 1.0, 1.0), albedo.rgb, albedo.a);
#endif
#if defined(_ALPHATEST_ON)
clip (albedo.a - _Cutoff + 0.0001);
#endif
}
void vertParticleUnlit (appdata_particles v, out VertexOutput o)
{
UNITY_SETUP_INSTANCE_ID(v);
UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);
#if defined(CURVEDWORLD_IS_INSTALLED) && !defined(CURVEDWORLD_DISABLED_ON)
#ifdef CURVEDWORLD_NORMAL_TRANSFORMATION_ON
CURVEDWORLD_TRANSFORM_VERTEX_AND_NORMAL(v.vertex, v.normal, v.tangent)
#else
CURVEDWORLD_TRANSFORM_VERTEX(v.vertex)
#endif
#endif
float4 clipPosition = UnityObjectToClipPos(v.vertex);
o.vertex = clipPosition;
o.color = v.color;
vertColor(o.color);
vertTexcoord(v, o);
vertFading(o);
vertDistortion(o);
UNITY_TRANSFER_FOG(o, o.vertex);
}
half4 fragParticleUnlit (VertexOutput IN) : SV_Target
{
UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(IN);
half4 albedo = readTexture (_MainTex, IN);
albedo *= _Color;
fragColorMode(IN);
fragSoftParticles(IN);
fragCameraFading(IN);
#if defined(_NORMALMAP)
float3 normal = normalize (UnpackScaleNormal (readTexture (_BumpMap, IN), _BumpScale));
#else
float3 normal = float3(0,0,1);
#endif
#if defined(_EMISSION)
half3 emission = readTexture (_EmissionMap, IN).rgb;
#else
half3 emission = 0;
#endif
fragDistortion(IN);
half4 result = albedo;
#if defined(_ALPHAMODULATE_ON)
result.rgb = lerp(half3(1.0, 1.0, 1.0), albedo.rgb, albedo.a);
#endif
result.rgb += emission * _EmissionColor * cameraFade * softParticlesFade;
#if !defined(_ALPHABLEND_ON) && !defined(_ALPHAPREMULTIPLY_ON) && !defined(_ALPHAOVERLAY_ON)
result.a = 1;
#endif
#if defined(_ALPHATEST_ON)
clip (albedo.a - _Cutoff + 0.0001);
#endif
#if defined(_ALPHAMODULATE_ON)
UNITY_APPLY_FOG_COLOR(IN.fogCoord, result, fixed4(1, 1, 1, 0)); // modulate - fog to white color
#elif !defined(_ALPHATEST_ON) && defined(_ALPHABLEND_ON) && !defined(_ALPHAPREMULTIPLY_ON)
if (_DstBlend == 1)
{
UNITY_APPLY_FOG_COLOR(IN.fogCoord, result, fixed4(0, 0, 0, 0)); // additive - fog to black color
}
else
{
UNITY_APPLY_FOG(IN.fogCoord, result); // fade - normal fog
}
#else
UNITY_APPLY_FOG(IN.fogCoord, result); // opaque - normal fog
#endif
return result;
}
#endif // UNITY_STANDARD_PARTICLES_INCLUDED
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