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| author | Dan Goodliffe <dan@randomdan.homeip.net> | 2023-10-31 01:26:58 +0000 |
|---|---|---|
| committer | Dan Goodliffe <dan@randomdan.homeip.net> | 2023-10-31 02:38:22 +0000 |
| commit | a0f1dc90aabd4cb5cfe2aef7116af170e6d0b953 (patch) | |
| tree | 6d31ec9e79f94d04d7270c754d5bd8c0814d57d7 /game/terrain2.cpp | |
| parent | Initial commit of walk/walkUtil terrain (diff) | |
| download | ilt-a0f1dc90aabd4cb5cfe2aef7116af170e6d0b953.tar.bz2 ilt-a0f1dc90aabd4cb5cfe2aef7116af170e6d0b953.tar.xz ilt-a0f1dc90aabd4cb5cfe2aef7116af170e6d0b953.zip | |
Helper type for storing/passing/returning a point and its containing face
point is const as face is mutable as a cache of the face containing
point.
Diffstat (limited to 'game/terrain2.cpp')
| -rw-r--r-- | game/terrain2.cpp | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/game/terrain2.cpp b/game/terrain2.cpp index 3e24778..e98cebb 100644 --- a/game/terrain2.cpp +++ b/game/terrain2.cpp @@ -54,6 +54,24 @@ TerrainMesh::findPoint(glm::vec2 p) const return findPoint(p, *faces_begin()); } +bool +TerrainMesh::locate(const TerrainMesh::PointFace & pointFace, FaceHandle start) const +{ + if (pointFace.face.is_valid()) { + assert(triangleContainsPoint(pointFace.point, pointFace.face)); + return true; + } + else { + return (pointFace.face = findPoint(pointFace.point, start)).is_valid(); + } +} + +bool +TerrainMesh::locate(const TerrainMesh::PointFace & pointFace) const +{ + return locate(pointFace, *faces_begin()); +} + namespace { [[nodiscard]] constexpr inline bool pointLeftOfLine(const glm::vec2 p, const glm::vec2 e1, const glm::vec2 e2) |