1 /// <summary>Amplitude of Grating</summary>
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2 /// <minValue>0</minValue>
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3 /// <maxValue>1</maxValue>
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4 /// <defaultValue>1</defaultValue>
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5 float contrast : register(C1);
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7 /// <summary>Phase of Grating</summary>
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8 /// <minValue>0</minValue>
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9 /// <maxValue>100</maxValue>
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10 /// <defaultValue>100</defaultValue>
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11 float frequency: register(C2);
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13 /// <summary>Phase of Grating</summary>
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14 /// <minValue>0</minValue>
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15 /// <maxValue>6.283184</maxValue>
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16 /// <defaultValue>0</defaultValue>
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17 float phase: register(C3);
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19 /// <summary>Orientation of Grating</summary>
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20 /// <minValue>0</minValue>
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21 /// <maxValue>6.283184</maxValue>
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22 /// <defaultValue>0</defaultValue>
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23 float orientation: register(C4);
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25 /// <summary>Half bandwidth of envelope</summary>
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26 /// <minValue>2</minValue>
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27 /// <maxValue>8</maxValue>
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28 /// <defaultValue>4</defaultValue>
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29 float sigma : register(C5);
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31 /// <summary>Transparency of Figure</summary>
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32 /// <minValue>0</minValue>
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33 /// <maxValue>1</maxValue>
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34 /// <defaultValue>1</defaultValue>
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35 float alpha : register(C6);
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40 const float2 Center = float2(0.5,0.5);
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41 float2 dir = uv - Center; // vector from center to pixel
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42 float dist = length(dir);
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47 float4 main(float2 uv : TEXCOORD) : COLOR
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48 //float4 main(float2 uv : VPOS ) : COLOR
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50 //float _r = rp(uv)*sigma*4.0;
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51 //float env = exp( -(_r*_r) / 2.0 ) * alpha;
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52 float _r = rp(uv)*8;
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53 float env = 1.0;//exp( -(_r*_r) / (2.0) ) * alpha;
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55 float _x = sin(orientation)*uv[0]-cos(orientation)*uv[1];
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56 float l = 0.5+env*contrast*0.5*cos(frequency*_x + phase);
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58 float4 color = float4(l,l,l,1.0);
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