65 lines
1.4 KiB
Plaintext
65 lines
1.4 KiB
Plaintext
// Copyright (c) 2019-present Evereal. All rights reserved.
|
|
|
|
Shader "VideoCapture/CubemapToEquirect2"
|
|
{
|
|
Properties
|
|
{
|
|
}
|
|
SubShader
|
|
{
|
|
// No culling or depth
|
|
Cull Off
|
|
ZWrite Off
|
|
ZTest Always
|
|
|
|
Pass
|
|
{
|
|
CGPROGRAM
|
|
#pragma vertex vert
|
|
#pragma fragment frag
|
|
|
|
#include "UnityCG.cginc"
|
|
|
|
struct appdata
|
|
{
|
|
float4 vertex : POSITION;
|
|
float2 uv : TEXCOORD0;
|
|
};
|
|
|
|
struct v2f
|
|
{
|
|
float2 uv : TEXCOORD0;
|
|
float4 vertex : SV_POSITION;
|
|
};
|
|
|
|
samplerCUBE _CubeTex;
|
|
float2 _SphereScale;
|
|
float2 _SphereOffset;
|
|
float4x4 _CubeTransform;
|
|
|
|
v2f vert(appdata v)
|
|
{
|
|
v2f o;
|
|
o.vertex = UnityObjectToClipPos(v.vertex);
|
|
o.uv = (v.uv *_SphereScale + _SphereOffset) * float2(UNITY_PI*2.0, UNITY_PI); // convert to angles
|
|
return o;
|
|
}
|
|
|
|
// convert spherical coordinates (azimuth, elevation angles) to Cartesian coordinates (x, y, z) on sphere
|
|
float3 sphericalToCartesian(float2 a)
|
|
{
|
|
return float3(cos(a.x)*sin(a.y), cos(a.y), sin(a.x)*sin(a.y));
|
|
}
|
|
|
|
fixed4 frag(v2f i) : SV_Target
|
|
{
|
|
float3 dir = sphericalToCartesian(i.uv);
|
|
dir = mul(_CubeTransform, float4(dir, 1)).xyz;
|
|
fixed4 col = texCUBE(_CubeTex, dir);
|
|
return col;
|
|
}
|
|
ENDCG
|
|
}
|
|
}
|
|
}
|