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started voxel cone tracing

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This commit is contained in:
turanszkij
2017-03-03 19:28:57 +01:00
parent 73ad636288
commit dd87bfdafb
1 changed files with 62 additions and 33 deletions
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WickedEngine/objectHF.hlsli
+62 -33
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@@ -129,43 +129,72 @@ static const float3 SAMPLES[16] = {
float3(0.0975089, -0.329594, 0.609803)
};
inline void VoxelRadiance(in float3 N, in float3 P, inout float ao)
inline void VoxelRadiance(in float3 N, in float3 P, inout float3 diffuse, inout float3 specular, inout float ao)
{
//[branch]
//if (g_xWorld_VoxelRadianceRemap > 0)
//{
// uint3 dim;
// uint mips;
// texture_voxelradiance.GetDimensions(0, dim.x, dim.y, dim.z, mips);
[branch]
if (g_xWorld_VoxelRadianceRemap > 0)
{
uint3 dim;
uint mips;
texture_voxelradiance.GetDimensions(0, dim.x, dim.y, dim.z, mips);
// float3 diff = (P - g_xWorld_VoxelRadianceDataCenter) / g_xWorld_VoxelRadianceDataRes / g_xWorld_VoxelRadianceDataSize;
// float3 uvw = diff * float3(0.5f, -0.5f, 0.5f) + 0.5f;
// diff = abs(diff);
// float blend = pow(saturate(max(diff.x, max(diff.y, diff.z))), 8);
float3 diff = (P - g_xWorld_VoxelRadianceDataCenter) / g_xWorld_VoxelRadianceDataRes / g_xWorld_VoxelRadianceDataSize;
float3 uvw = diff * float3(0.5f, -0.5f, 0.5f) + 0.5f;
diff = abs(diff);
float blend = pow(saturate(max(diff.x, max(diff.y, diff.z))), 8);
// float occ = 0;
// for (uint s = 0; s < 16; ++s)
// {
// uint step = 0;
// float mip = 0;
// for (step; step < (uint)g_xWorld_VoxelRadianceDataRes; ++step)
// {
// uvw += (1 + mip) * normalize(N * 2 + SAMPLES[s]) / g_xWorld_VoxelRadianceDataRes / g_xWorld_VoxelRadianceDataSize;
// float opa = texture_voxelradiance.SampleLevel(sampler_linear_clamp, uvw, mip).a;
// mip += 0.7f;
//float occ = 0;
//for (uint s = 0; s < 16; ++s)
//{
// uint step = 0;
// float mip = 0;
// for (step; step < (uint)g_xWorld_VoxelRadianceDataRes; ++step)
// {
// uvw += (1 + mip) * normalize(N * 2 + SAMPLES[s]) / g_xWorld_VoxelRadianceDataRes / g_xWorld_VoxelRadianceDataSize;
// float opa = texture_voxelradiance.SampleLevel(sampler_linear_clamp, uvw, mip).a;
// mip += 0.7f;
// if (opa > 0.99f || mip >= (float)mips || any(uvw - saturate(uvw)))
// {
// break;
// }
// }
// occ += step;
// }
// occ /= 16.0f;
// occ = 1 - occ;
// if (opa > 0.99f || mip >= (float)mips || any(uvw - saturate(uvw)))
// {
// break;
// }
// }
// occ += step;
//}
//occ /= 16.0f;
//occ = 1 - occ;
// ao *= lerp(occ, 1, blend);
//}
float4 radiance = 0;
for (uint cone = 0; cone < 1; ++cone)
{
float4 _radiance = 0;
float step = 0;
float dist = 0;
for (int i = 0; i < g_xWorld_VoxelRadianceDataRes; ++i)
{
step++;
uvw += (1 + dist) * normalize(N * 20 + SAMPLES[cone]) / g_xWorld_VoxelRadianceDataRes / g_xWorld_VoxelRadianceDataSize;
if (any(uvw - saturate(uvw)))
break;
float4 vox = texture_voxelradiance.SampleLevel(sampler_linear_clamp, uvw, dist).a;
_radiance += vox;
if (_radiance.a > 0.9 || dist >= (float)mips)
break;
dist += 0.7f * step;
}
_radiance /= step;
radiance += _radiance;
}
radiance /= 1.0f;
//diffuse += lerp(radiance.rgb, 0, blend);
ao *= lerp(1 - radiance.a, 1, blend);
}
}
inline void DirectionalLight(in float3 N, in float3 V, in float3 P, in float3 f0, in float3 albedo, in float roughness,
@@ -325,7 +354,7 @@ inline void TiledLighting(in float2 pixel, in float3 N, in float3 V, in float3 P
TiledLighting(pixel, N, V, P, f0, albedo, roughness, diffuse, specular);
#define OBJECT_PS_VOXELRADIANCE \
VoxelRadiance(N, P, ao);
VoxelRadiance(N, P, diffuse, specular, ao);
#define OBJECT_PS_LIGHT_END \
color.rgb = lerp(1, GetAmbientColor() * ao + diffuse, opacity) * albedo + specular;