您最多选择25个主题
主题必须以中文或者字母或数字开头，可以包含连字符 (-)，并且长度不得超过35个字符
91 行
2.2 KiB
91 行
2.2 KiB
Shader "Hidden/HDRenderPipeline/Sky/SkyHDRI"
|
|
{
|
|
HLSLINCLUDE
|
|
|
|
#pragma vertex Vert
|
|
#pragma fragment Frag
|
|
|
|
#pragma target 4.5
|
|
#pragma only_renderers d3d11 ps4 xboxone vulkan metal
|
|
|
|
#include "ShaderLibrary/Common.hlsl"
|
|
#include "../../../ShaderVariables.hlsl"
|
|
#include "ShaderLibrary/Color.hlsl"
|
|
#include "ShaderLibrary/CommonLighting.hlsl"
|
|
#include "ShaderLibrary/VolumeRendering.hlsl"
|
|
|
|
TEXTURECUBE(_Cubemap);
|
|
#ifdef VOLUMETRIC_LIGHTING_ENABLED
|
|
TEXTURE3D(_VBufferLighting);
|
|
#endif
|
|
|
|
float4 _SkyParam; // x exposure, y multiplier, z rotation
|
|
float4x4 _PixelCoordToViewDirWS; // Actually just 3x3, but Unity can only set 4x4
|
|
|
|
struct Attributes
|
|
{
|
|
uint vertexID : SV_VertexID;
|
|
};
|
|
|
|
struct Varyings
|
|
{
|
|
float4 positionCS : SV_POSITION;
|
|
};
|
|
|
|
Varyings Vert(Attributes input)
|
|
{
|
|
Varyings output;
|
|
output.positionCS = GetFullScreenTriangleVertexPosition(input.vertexID, UNITY_RAW_FAR_CLIP_VALUE);
|
|
return output;
|
|
}
|
|
|
|
float4 Frag(Varyings input) : SV_Target
|
|
{
|
|
// Points towards the camera
|
|
float3 viewDirWS = normalize(mul(float3(input.positionCS.xy, 1.0), (float3x3)_PixelCoordToViewDirWS));
|
|
// Reverse it to point into the scene
|
|
float3 dir = -viewDirWS;
|
|
|
|
// Rotate direction
|
|
float phi = DegToRad(_SkyParam.z);
|
|
float cosPhi, sinPhi;
|
|
sincos(phi, sinPhi, cosPhi);
|
|
float3 rotDirX = float3(cosPhi, 0, -sinPhi);
|
|
float3 rotDirY = float3(sinPhi, 0, cosPhi);
|
|
dir = float3(dot(rotDirX, dir), dir.y, dot(rotDirY, dir));
|
|
|
|
float3 skyColor = ClampToFloat16Max(SAMPLE_TEXTURECUBE_LOD(_Cubemap, s_linear_clamp_sampler, dir, 0).rgb * exp2(_SkyParam.x) * _SkyParam.y);
|
|
|
|
return float4(skyColor, 1.0);
|
|
}
|
|
|
|
ENDHLSL
|
|
|
|
SubShader
|
|
{
|
|
Pass
|
|
{
|
|
ZWrite Off
|
|
ZTest Always
|
|
Blend Off
|
|
Cull Off
|
|
|
|
HLSLPROGRAM
|
|
ENDHLSL
|
|
|
|
}
|
|
|
|
Pass
|
|
{
|
|
ZWrite Off
|
|
ZTest LEqual
|
|
Blend Off
|
|
Cull Off
|
|
|
|
HLSLPROGRAM
|
|
ENDHLSL
|
|
}
|
|
|
|
}
|
|
Fallback Off
|
|
}
|