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ImDrawList: add PathFillConcave(), AddConcavePolyFilled(): amends (#760)

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- Simplify and compact some code. Shallow tweaks.
- Add comments.
- Add concave shape demo.
- Remove coarse culling.
- Remove nested types to match coding style and for consistent type nams when translated to other languages.
- Merged ClassifyNode() and ReclassifyNode().
- Extracted ImTriangleIsClockwise().
- Hold copy of points inside nodes instead of pointing to them.
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ocornut
2024-01-09 23:36:26 +01:00
parent 1ff90c52d5
commit fbf45ad149
5 changed files with 160 additions and 272 deletions
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imgui_internal.h
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@@ -498,7 +498,8 @@ IMGUI_API ImVec2 ImLineClosestPoint(const ImVec2& a, const ImVec2& b, const
IMGUI_API bool ImTriangleContainsPoint(const ImVec2& a, const ImVec2& b, const ImVec2& c, const ImVec2& p);
IMGUI_API ImVec2 ImTriangleClosestPoint(const ImVec2& a, const ImVec2& b, const ImVec2& c, const ImVec2& p);
IMGUI_API void ImTriangleBarycentricCoords(const ImVec2& a, const ImVec2& b, const ImVec2& c, const ImVec2& p, float& out_u, float& out_v, float& out_w);
inline float ImTriangleArea(const ImVec2& a, const ImVec2& b, const ImVec2& c) { return ImFabs((a.x * (b.y - c.y)) + (b.x * (c.y - a.y)) + (c.x * (a.y - b.y))) * 0.5f; }
inline float ImTriangleArea(const ImVec2& a, const ImVec2& b, const ImVec2& c) { return ImFabs((a.x * (b.y - c.y)) + (b.x * (c.y - a.y)) + (c.x * (a.y - b.y))) * 0.5f; }
inline bool ImTriangleIsClockwise(const ImVec2& a, const ImVec2& b, const ImVec2& c) { return ((b.x - a.x) * (c.y - b.y)) - ((c.x - b.x) * (b.y - a.y)) > 0.0f; }
// Helper: ImVec1 (1D vector)
// (this odd construct is used to facilitate the transition between 1D and 2D, and the maintenance of some branches/patches)