Evaluate boolean combinations of implicit function using current operator.
| 60 | |
| 61 | // Evaluate boolean combinations of implicit function using current operator. |
| 62 | double vtkImplicitBoolean::EvaluateFunction(double x[3]) |
| 63 | { |
| 64 | double value = 0; |
| 65 | double v; |
| 66 | vtkImplicitFunction* f; |
| 67 | |
| 68 | if (this->FunctionList->GetNumberOfItems() == 0) |
| 69 | { |
| 70 | return value; |
| 71 | } |
| 72 | |
| 73 | vtkCollectionSimpleIterator sit; |
| 74 | if (this->OperationType == VTK_UNION) |
| 75 | { // take minimum value |
| 76 | for (value = VTK_DOUBLE_MAX, this->FunctionList->InitTraversal(sit); |
| 77 | (f = this->FunctionList->GetNextImplicitFunction(sit));) |
| 78 | { |
| 79 | if ((v = f->FunctionValue(x)) < value) |
| 80 | { |
| 81 | value = v; |
| 82 | } |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | else if (this->OperationType == VTK_INTERSECTION) |
| 87 | { // take maximum value |
| 88 | for (value = -VTK_DOUBLE_MAX, this->FunctionList->InitTraversal(sit); |
| 89 | (f = this->FunctionList->GetNextImplicitFunction(sit));) |
| 90 | { |
| 91 | if ((v = f->FunctionValue(x)) > value) |
| 92 | { |
| 93 | value = v; |
| 94 | } |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | else if (this->OperationType == VTK_UNION_OF_MAGNITUDES) |
| 99 | { // take minimum absolute value |
| 100 | for (value = VTK_DOUBLE_MAX, this->FunctionList->InitTraversal(sit); |
| 101 | (f = this->FunctionList->GetNextImplicitFunction(sit));) |
| 102 | { |
| 103 | if ((v = fabs(f->FunctionValue(x))) < value) |
| 104 | { |
| 105 | value = v; |
| 106 | } |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | else // difference |
| 111 | { |
| 112 | vtkImplicitFunction* firstF; |
| 113 | this->FunctionList->InitTraversal(sit); |
| 114 | if ((firstF = this->FunctionList->GetNextImplicitFunction(sit)) != nullptr) |
| 115 | { |
| 116 | value = firstF->FunctionValue(x); |
| 117 | } |
| 118 | |
| 119 | for (this->FunctionList->InitTraversal(sit); |
nothing calls this directly
no test coverage detected