| 61 | } |
| 62 | |
| 63 | bool Culler::IsVisible(BoundingSphere<float> const& sphere) |
| 64 | { |
| 65 | if (sphere.GetRadius() == 0.0f) |
| 66 | { |
| 67 | // The node is a dummy node and cannot be visible. |
| 68 | return false; |
| 69 | } |
| 70 | |
| 71 | // Start with the last pushed plane, which is potentially the most |
| 72 | // restrictive plane. |
| 73 | int32_t index = mPlaneQuantity - 1; |
| 74 | uint32_t mask = (1u << index); |
| 75 | |
| 76 | for (int32_t i = 0; i < mPlaneQuantity; ++i, --index, mask >>= 1) |
| 77 | { |
| 78 | if (mPlaneState & mask) |
| 79 | { |
| 80 | int32_t side = sphere.WhichSide(mPlane[index]); |
| 81 | |
| 82 | if (side < 0) |
| 83 | { |
| 84 | // The object is on the negative side of the plane, so |
| 85 | // cull it. |
| 86 | return false; |
| 87 | } |
| 88 | |
| 89 | if (side > 0) |
| 90 | { |
| 91 | // The object is on the positive side of plane. There is |
| 92 | // no need to compare subobjects against this plane, so |
| 93 | // mark it as inactive. |
| 94 | mPlaneState &= ~mask; |
| 95 | } |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | return true; |
| 100 | } |
| 101 | |
| 102 | void Culler::Insert(Visual* visible) |
| 103 | { |
no test coverage detected