init

gamedata/shaders/r2/accum_volumetric.ps.hlsl

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+#include "common.hlsli"
+#include "shadow.hlsli"
+
+struct v2p
+{
+    float3 lightToPos : TEXCOORD0; // light center to plane vector
+    float3 vPos : TEXCOORD1; // position in camera space
+    float fDensity : TEXCOORD2; // plane density alon Z axis
+    //	float2	tNoise 		: TEXCOORD3;	// projective noise
+};
+
+uniform float4 m_lmap[2];
+uniform sampler2D s_noise;
+
+#define USE_LMAP
+#define USE_LMAPXFORM
+#define USE_SHADOW
+
+// Pixel
+float4 main(v2p I) : COLOR
+{
+    // ----- shadow
+    float4 P4 = float4(I.vPos, 1.0f);
+    float4 PS = mul(m_shadow, P4);
+    float s = 1.0f;
+#ifdef USE_SHADOW
+    s = shadow(PS);
+#endif
+
+    // ----- lightmap
+    float4 lightmap = 1.0f;
+#ifdef USE_LMAP
+    #ifdef USE_LMAPXFORM
+    PS.x = dot(P4, m_lmap[0]);
+    PS.y = dot(P4, m_lmap[1]);
+    #endif
+    lightmap = tex2Dproj(s_lmap, PS); //
+#endif
+
+    // ----- attenuate
+    float rsqr = dot(I.lightToPos, I.lightToPos); // distance 2 light (squared)
+    float att = saturate(1 - rsqr * Ldynamic_pos.w); // q-linear attenuate
+    // float  att 	= saturate( 1 - (rsqr * Ldynamic_pos.w)*(rsqr * Ldynamic_pos.w) ); // q-linear attenuate
+    // float  att 	= 10*(1/(1+0.1*rsqr));
+    // float  att 	= 1.0h/rsqr;
+    // float  att 	= 1.0h/rsqr-Ldynamic_pos.w;
+    // float  att 	= 5*(sqrt(1.0h/rsqr)-sqrt(Ldynamic_pos.w));
+
+    // ----- noise
+    PS.xy /= PS.w;
+    float time = timers.z * 0.1f;
+    PS.xy /= 3;
+    PS.x += time;
+    float4 t_noise = tex2D(s_noise, PS);
+    PS.x -= time;
+    PS.y -= time * 0.70091f;
+    t_noise *= tex2D(s_noise, PS);
+    // t_noise *= 4;
+    t_noise = t_noise * 0.5f + 0.5f;
+
+    // out
+    // float maxIntens = 1.0h/100.0h;
+    // float maxIntens = 1.0h/40.0h;
+    // float maxIntens = 1.0h/10.0h;
+    float maxIntens = I.fDensity;
+    float3 result = maxIntens * s * att;
+    result *= lightmap;
+    result *= Ldynamic_color * t_noise;
+
+    //	result = maxIntens;
+    //	result *= lightmap;
+
+    //	result = 0.1h;
+    //	result = 0.0h;
+    return float4(result, 0.0f);
+}