From a0f1dc90aabd4cb5cfe2aef7116af170e6d0b953 Mon Sep 17 00:00:00 2001 From: Dan Goodliffe Date: Tue, 31 Oct 2023 01:26:58 +0000 Subject: 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. --- game/terrain2.cpp | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'game/terrain2.cpp') 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) -- cgit v1.2.3