68 lines
1.5 KiB
HLSL
68 lines
1.5 KiB
HLSL
#include "common.hlsli"
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#include "shadow.hlsli"
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struct v2p
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{
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float3 lightToPos : TEXCOORD0; // light center to plane vector
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float3 vPos : TEXCOORD1; // position in camera space
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float fDensity : TEXCOORD2; // plane density along Z axis
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};
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uniform float4 m_lmap[2];
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Texture2D s_noise;
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#define USE_LMAP
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#define USE_LMAPXFORM
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#define USE_SHADOW
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// Pixel
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float4 main(v2p I) : SV_Target
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{
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// ----- shadow
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float4 P4 = float4(I.vPos, 1);
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float4 PS = mul(m_shadow, P4);
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float s = 1.0f;
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#ifdef USE_SHADOW
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s = shadow(PS);
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#endif
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// ----- lightmap
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float4 lightmap = 1.0f;
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#ifdef USE_LMAP
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#ifdef USE_LMAPXFORM
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PS.x = dot(P4, m_lmap[0]);
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PS.y = dot(P4, m_lmap[1]);
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#endif
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lightmap = s_lmap.Sample(smp_rtlinear, PS.xy / PS.w);
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#endif
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// ----- attenuate
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float rsqr = dot(I.lightToPos, I.lightToPos); // distance 2 light (squared)
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float att = saturate(1 - rsqr * Ldynamic_pos.w); // q-linear attenuate
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// ----- noise
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PS.xy /= PS.w;
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PS.xy *= 0.3333;
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float time = timers.z * 0.1;
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PS.x += time;
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float4 t_noise = s_noise.SampleLevel(smp_linear, PS.xy, 0);
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PS.x -= time;
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PS.y -= time * 0.70091;
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t_noise *= s_noise.SampleLevel(smp_linear, PS.xy, 0);
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t_noise = t_noise * 0.5 + 0.5;
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// out
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float maxIntens = I.fDensity;
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float3 result = maxIntens * s * att;
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result *= lightmap.xyz;
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result *= Ldynamic_color.xyz * t_noise.xyz;
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return float4(PushGamma(result), 0);
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}
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