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#ifndef POI_DECAL
#define POI_DECAL
POI_TEXTURE_NOSAMPLER(_DecalTexture);
POI_TEXTURE_NOSAMPLER(_DecalMask);
float4 _DecalColor;
fixed _DecalTiled;
fixed _DecalBlendAdd;
fixed _DecalBlendMultiply;
fixed _DecalBlendReplace;
half _DecalRotation;
half2 _DecalScale;
half2 _DecalPosition;
half _DecalRotationSpeed;
void applyDecal(inout float4 albedo)
{
float2 uv = poiMesh.uv[_DecalTextureUV];
float2 decalCenter = _DecalPosition;
float theta = radians(_DecalRotation + _Time.z * _DecalRotationSpeed);
float cs = cos(theta);
float sn = sin(theta);
uv = float2((uv.x - decalCenter.x) * cs - (uv.y - decalCenter.y) * sn + decalCenter.x, (uv.x - decalCenter.x) * sn + (uv.y - decalCenter.y) * cs + decalCenter.y);
uv = remap(uv, float2(0, 0) - _DecalScale / 2 + _DecalPosition, _DecalScale / 2 + _DecalPosition, float2(0, 0), float2(1, 1));
half decalAlpha = 1;
//float2 uv = TRANSFORM_TEX(poiMesh.uv[_DecalTextureUV], _DecalTexture) + _Time.x * _DecalTexturePan;
float4 decalColor = POI2D_SAMPLER_PAN(_DecalTexture, _MainTex, uv, _DecalTexturePan);
decalAlpha *= POI2D_SAMPLER_PAN(_DecalMask, _MainTex, poiMesh.uv[_DecalMaskUV], _DecalMaskPan).r;
UNITY_BRANCH
if (!_DecalTiled)
{
if(uv.x > 1 || uv.y > 1 || uv.x < 0 || uv.y < 0)
{
decalAlpha = 0;
}
}
albedo.rgb = lerp(albedo.rgb, decalColor.rgb, decalColor.a * decalAlpha * _DecalBlendReplace);
albedo.rgb *= lerp(1, decalColor.rgb, decalColor.a * decalAlpha * _DecalBlendMultiply);
albedo.rgb += decalColor.rgb * decalColor.a * decalAlpha * _DecalBlendAdd;
albedo = saturate(albedo);
}
#endif
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