turanszkij
63 lines
1.6 KiB
HLSL
63 lines
1.6 KiB
HLSL
#include "grassHF_GS.hlsli"
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[maxvertexcount(42)]
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void main(
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point VS_OUT input[1],
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inout TriangleStream< GS_OUT > output
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)
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{
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float grassLength = input[0].nor.w;
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float3 root = mul(float4(input[0].pos.xyz, 1), xWorld).xyz;
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//Sphere sphere = { mul(float4(root,1), g_xCamera_View).xyz, grassLength };
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//if (!SphereInsideFrustum(sphere, frustum, 1, LOD2))
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//{
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// return;
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//}
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uint rand = input[0].pos.w;
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float4 pos = float4(input[0].pos.xyz, 1);
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float3 color = saturate(xColor.xyz + sin(pos.x - pos.y - pos.z)*0.013f)*0.5;
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float3 wind = sin(g_xFrame_Time + (pos.x + pos.y + pos.z)*0.1f)*g_xFrame_WindDirection.xyz*0.1;
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if (rand % (uint)g_xFrame_WindRandomness) wind = -wind;
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float3 normal = input[0].nor.xyz;
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float3 right = normalize(cross(input[0].tan.xyz, normal))*0.3;
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if (rand % 2) right *= -1;
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float dist = distance(root, g_xCamera_CamPos);
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[branch]
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if (dist < LOD0)
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{
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for (uint i = 0; i<6; ++i) {
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float4 mod = pos + float4(cross(MOD[i], normal), 0);
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genBlade(output, mod, normal, grassLength, 1, right, color, wind, 0);
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}
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}
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else if (dist < LOD1)
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{
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for (uint i = 0; i<3; ++i) {
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float4 mod = pos + float4(cross(MOD[i], normal), 0);
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genBlade(output, mod, normal, grassLength, 2, right, color, wind, 0);
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}
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}
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else
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{
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[unroll]
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for (uint i = 0; i<1; ++i) {
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float4 mod = pos + float4(cross(MOD[i], normal), 0);
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#ifdef GRASS_FADE_DITHER
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static const float grassPopDistanceThreshold = 0.9f;
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const float fade = pow(saturate(dist / (LOD2*grassPopDistanceThreshold)), 10);
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#else
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static const float fade = 0;
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#endif
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genBlade(output, mod, normal, grassLength, 4, right, color, wind, fade);
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}
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}
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} |