| 46 | /************************************************************************/ |
| 47 | |
| 48 | int InvGeoTransform( double *gt_in, double *gt_out ) |
| 49 | |
| 50 | { |
| 51 | double det, inv_det; |
| 52 | |
| 53 | /* we assume a 3rd row that is [1 0 0] */ |
| 54 | |
| 55 | /* Compute determinate */ |
| 56 | |
| 57 | det = gt_in[1] * gt_in[5] - gt_in[2] * gt_in[4]; |
| 58 | |
| 59 | if( fabs(det) < 0.000000000000001 ) |
| 60 | return 0; |
| 61 | |
| 62 | inv_det = 1.0 / det; |
| 63 | |
| 64 | /* compute adjoint, and devide by determinate */ |
| 65 | |
| 66 | gt_out[1] = gt_in[5] * inv_det; |
| 67 | gt_out[4] = -gt_in[4] * inv_det; |
| 68 | |
| 69 | gt_out[2] = -gt_in[2] * inv_det; |
| 70 | gt_out[5] = gt_in[1] * inv_det; |
| 71 | |
| 72 | gt_out[0] = ( gt_in[2] * gt_in[3] - gt_in[0] * gt_in[5]) * inv_det; |
| 73 | gt_out[3] = (-gt_in[1] * gt_in[3] + gt_in[0] * gt_in[4]) * inv_det; |
| 74 | |
| 75 | return 1; |
| 76 | } |
| 77 | |
| 78 | #if defined(USE_PROJ) && defined(USE_GDAL) |
| 79 |
no outgoing calls
no test coverage detected