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#ifndef PANOSPHERE
#define PANOSPHERE
sampler2D _PanosphereTexture; float4 _PanosphereTexture_ST;
sampler2D _PanoMapTexture; float4 _PanoMapTexture_ST;
float _PanoEmission;
float _PanoBlend;
float4 _PanosphereColor;
float4 _PanosphereScroll;
float3 panoColor;
float panoMask;
float2 StereoPanoProjection(float3 coords)
{
float3 normalizedCoords = normalize(coords);
float latitude = acos(normalizedCoords.y);
float longitude = atan2(normalizedCoords.z, normalizedCoords.x);
float2 sphereCoords = float2(longitude + _Time.y * _PanosphereScroll.x, latitude + _Time.y * _PanosphereScroll.y) * float2(0.5 / UNITY_PI, 1.0 / UNITY_PI);
sphereCoords = float2(0.5, 1.0) - sphereCoords;
return(sphereCoords + float4(0, 1 - unity_StereoEyeIndex, 1, 0.5).xy) * float4(0, 1 - unity_StereoEyeIndex, 1, 0.5).zw;
}
void calculatePanosphere(float3 worldPos, float2 uv)
{
float2 _StereoEnabled_var = StereoPanoProjection(normalize(_WorldSpaceCameraPos.xyz - worldPos.xyz) * - 1);
panoColor = tex2D(_PanosphereTexture, TRANSFORM_TEX(_StereoEnabled_var, _PanosphereTexture)) * _PanosphereColor.rgb;
panoMask = tex2D(_PanoMapTexture, TRANSFORM_TEX(uv, _PanoMapTexture));
}
void applyPanosphereColor(inout float4 finalColor)
{
finalColor.rgb = lerp(finalColor.rgb, panoColor, _PanoBlend * panoMask);
}
void applyPanosphereEmission(inout float4 finalColor)
{
finalColor.rgb += panoColor * _PanoBlend * panoMask * _PanoEmission;
}
#endif
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