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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 30 | Werner | 1 | #include "ImageStamp.h" |
| 3 | Werner | 2 | |
| 30 | Werner | 3 | bool ImageStamp::load(const QString& filename) |
| 3 | Werner | 4 | { |
| 5 | if (!mImage.load(filename)) |
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| 6 | return false; |
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| 7 | rScale=1.f; hScale=1.f; |
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| 8 | return true; |
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| 9 | } |
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| 10 | |||
| 11 | /************************************ |
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| 12 | ** get Value at position (x,y) |
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| 13 | ** the return value is scaled to 0..hScale |
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| 14 | ** range for x/y is -1..+1 |
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| 15 | **************************************/ |
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| 30 | Werner | 16 | float ImageStamp::getXY(const float x, const float y) |
| 3 | Werner | 17 | { |
| 18 | int ix, iy; |
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| 19 | ix = int( (x+1.f) * ( mImage.width() / 2.) ); // scale from -1..1 |
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| 20 | iy = int( (y+1.f) * (mImage.height() / 2.) ); |
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| 21 | if (!mImage.valid(ix, iy)) |
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| 6 | Werner | 22 | return 1.f; |
| 3 | Werner | 23 | QRgb p = mImage.pixel(ix, iy); |
| 8 | Werner | 24 | // scaling: range from 0..1 is scaled to 1-hScale to 1 (e.g.: hScale=0.8 -> result: 0.2..1) |
| 25 | if (hScale!=1) |
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| 26 | return (1.-hScale) + hScale*qGray(p)/255.; |
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| 27 | else |
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| 28 | return (qGray(p)/255.); |
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| 3 | Werner | 29 | |
| 30 | } |
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| 31 | |||
| 32 | /************************************ |
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| 33 | ** get Value at radius r (0..rScale) and |
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| 34 | ** angle phi (in radians). |
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| 35 | ** note: 0: East, pi/2: North, pi: West, 3pi/2: South |
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| 36 | **************************************/ |
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| 30 | Werner | 37 | float ImageStamp::get(const float r, const float phi) |
| 3 | Werner | 38 | { |
| 39 | if (fabs(r)>rScale) |
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| 6 | Werner | 40 | return 1.f; |
| 3 | Werner | 41 | |
| 42 | float x, y; |
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| 43 | float r_unit = r/rScale; // scale to size of radius |
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| 44 | x = r_unit * sin(phi); |
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| 45 | y = r_unit * cos(phi); |
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| 46 | return getXY(x,y); |
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| 47 | } |
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| 48 |