//Particle shader
//Slighty modded by QuadCoreMax
#include "atmosphere.cg"
#include "lighting.cg"
#include "shadowmapping.cg"
#define SOFT_PARTICLES
//#define PARTICLE_CSM
// Vertex to pixel shader structure
struct v2p
{
//float4 position : POSITION;
float3 position : TEXCOORD4;
float2 uv : TEXCOORD0;
float4 color : COLOR;
float3 Direction : TEXCOORD1;
float4 RayleighColor : TEXCOORD2;
float4 MieColor : TEXCOORD3;
float extinction : TEXCOORD6;
//float3 wpos : WPOS;
#ifdef SOFT_PARTICLES
// Test Z
float4 wpos : WPOS;
#endif
};
float LinearizeDepth(float depth, float near, float far)
{
return (2 * near) / (far + near - depth * (far - near));
}
void main
(
in v2p IN,
out float4 outColor : COLOR0,
#ifdef CSM_MRT
out float4 outShadow : COLOR1,
#endif
// Constants
uniform sampler2D baseMap : TEXUNIT0,
//uniform sampler2D normalMap : TEXUNIT1,
#ifdef SOFT_PARTICLES
uniform sampler2D curDepthTex : TEXUNIT6,
uniform float frustumNear,
uniform float frustumFar,
uniform float2 resolution,
#endif
uniform float3 lightDirection,
uniform float3 lightColor,
uniform float3 lightAmbient,
uniform float atmosRayleigh,
uniform float atmosMie,
#ifdef CSM
#ifdef PARTICLE_CSM
uniform sampler2D shadowArray : TEXUNIT7,
uniform float4x4 smTexMatArray[SM_MAX_SPLITS],
uniform float smSplits,
#endif
#endif
// uniform float3 eyePosW,
uniform float3 Ke,
uniform float3 Ka,
uniform float3 Kd,
uniform float3 Ks,
uniform float shininess,
uniform float sunny
// uniform float exposure
)
{
float shadow=sunny;
#ifdef CSM
#ifdef PARTICLE_CSM
float shadow;
//float3 pos=IN.position;
// Output shadowing and normals
shadow=GetShadowFactor(IN.position, float3(0,1,0),shadowArray, smTexMatArray, smSplits, lightDirection)*sunny;
//outShadow.rgb = IN.normal;
#endif
#endif
//shadow+=0.1f;
//shadow=saturate(shadow);
//shadow=0.1f;
float3 skyColor=GetSkyColor(lightDirection,IN.Direction,IN.RayleighColor,IN.MieColor,atmosRayleigh,atmosMie,lightColor,lightAmbient);
// Fast when close up
if(IN.color.a<0.01)discard;
//Lighting is not used -> heavy + particles are flat anyway
//float3 normal = tex2D(normalMap, IN.uv);
//LightingSun(Ke,Ka,Kd,Ks,shininess,lightDirection,lightColor,lightAmbient,IN.Position,N,IN.eyePosTS,
//ambient,diffuse,specular);
// Get base texture color
float4 baseCol=tex2D(baseMap,IN.uv);
float3 lighting = (lightColor*shadow)+lightAmbient; //*0.5f + float3(1,1,1)*0.5f;
float3 coloring = IN.color; //*0.5f + float3(1,1,1)*0.5f;
float3 tempColor = baseCol * coloring * lighting; // + lightAmbient*0.25f;
//tempColor=baseCol;
// Mix sky with texture color based on atmospheric influence
outColor.rgb=lerp(skyColor, tempColor,IN.extinction);
//outColor.rgb=IN.wpos.z;
//outColor.rgb=tempColor.rgb;
//outColor.rgb=baseCol.rgb;
//pixelPos.z=IN.wpos.w;
outColor.a = baseCol.a * IN.color.a;
//outColor.rgb=(1.0-tex2D(curDepthTex,pixelPos.xy).x)*50.0f;
//outColor.rgb=;
//outColor.rgb=(1.0f-pixelPos.z)*50.0f;
//outColor.b=0.0f;
#ifdef SOFT_PARTICLES
float3 pixelPos=IN.wpos.xyz;
[COLOR=darkred][B] float alpha=(float)IN.wpos.a;[/B][/COLOR]
pixelPos.xy/=resolution;
pixelPos.z=LinearizeDepth(pixelPos.z,frustumNear,frustumFar);
pixelPos.z=LinearizeDepth(tex2D(curDepthTex,pixelPos.xy).x,frustumNear,frustumFar)-pixelPos.z;
// depth should be made linear
//outColor.a*=pow(saturate(pixelPos.z*1.0*(frustumFar-frustumNear)),2);
[COLOR=darkred][B] outColor.a*=shadow * alpha;[/B][/COLOR]
#endif
#ifdef CSM_MRT
//outShadow.a=shadow;
outShadow.rgba=0;
//outShadow.rgba=float4(0,0,0,0);
#endif
}
