init

gamedata/shaders/d3d11/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 along Z axis
+};
+
+uniform float4 m_lmap[2];
+Texture2D s_noise;
+
+#define USE_LMAP
+#define USE_LMAPXFORM
+#define USE_SHADOW
+
+// Pixel
+float4 main(v2p I) : SV_Target
+{
+    // ----- shadow
+    float4 P4 = float4(I.vPos, 1);
+    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 = s_lmap.Sample(smp_rtlinear, PS.xy / PS.w);
+#endif
+
+    // ----- attenuate
+    float rsqr = dot(I.lightToPos, I.lightToPos); // distance 2 light (squared)
+    float att = saturate(1 - rsqr * Ldynamic_pos.w); // q-linear attenuate
+
+    // ----- noise
+    PS.xy /= PS.w;
+    PS.xy *= 0.3333;
+    float time = timers.z * 0.1;
+    PS.x += time;
+	
+    float4 t_noise = s_noise.SampleLevel(smp_linear, PS.xy, 0);
+	
+    PS.x -= time;
+    PS.y -= time * 0.70091;
+	
+    t_noise *= s_noise.SampleLevel(smp_linear, PS.xy, 0);
+    t_noise = t_noise * 0.5 + 0.5;
+
+    // out
+    float maxIntens = I.fDensity;
+    float3 result = maxIntens * s * att;
+	
+    result *= lightmap.xyz;
+    result *= Ldynamic_color.xyz * t_noise.xyz;
+
+    return float4(PushGamma(result), 0);
+}
+