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#ifndef EMISSION
#define EMISSION
float4 _EmissionColor;
sampler2D _EmissionMap; float4 _EmissionMap_ST;
sampler2D _EmissionMask; float4 _EmissionMask_ST;
float _EmissionStrength;
float4 _EmissiveScroll_Direction;
float4 _EmissionScrollSpeed;
float _EmissiveScroll_Width;
float _EmissiveScroll_Velocity;
float _EmissiveScroll_Interval;
float _EmissiveBlink_Min;
float _EmissiveBlink_Max;
float _EmissiveBlink_Velocity;
float _ScrollingEmission;
float4 emission = 0;
void calculateEmission(float2 uv, float3 localPos)
{
float4 _Emissive_Tex_var = tex2D(_EmissionMap, TRANSFORM_TEX(uv, _EmissionMap) + _Time.y * _EmissionScrollSpeed);
emission = _Emissive_Tex_var * _EmissionColor * _EmissionStrength;
// scrolling emission
if (_ScrollingEmission == 1)
{
float phase = dot(localPos, _EmissiveScroll_Direction);
phase -= _Time.y * _EmissiveScroll_Velocity;
phase /= _EmissiveScroll_Interval;
phase -= floor(phase);
float width = _EmissiveScroll_Width;
phase = (pow(phase, width) + pow(1 - phase, width * 4)) * 0.5;
emission *= phase;
}
// blinking emission
float amplitude = (_EmissiveBlink_Max - _EmissiveBlink_Min) * 0.5f;
float base = _EmissiveBlink_Min + amplitude;
float emissiveBlink = sin(_Time.y * _EmissiveBlink_Velocity) * amplitude + base;
emission *= emissiveBlink;
float _Emission_mask_var = tex2D(_EmissionMask, TRANSFORM_TEX(uv, _EmissionMask));
emission *= _Emission_mask_var;
}
void applyEmission(inout float4 finalColor)
{
finalColor.rgb += emission;
}
#endif
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