e2e1984e60
A few headers like BLI_math_constants.h and BLI_utildefines.h keep working for C code, for remaining makesdna and userdef defaults code in C. Pull Request: https://projects.blender.org/blender/blender/pulls/134406
43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
/* SPDX-FileCopyrightText: 2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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#pragma once
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/** \file
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* \ingroup bli
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*/
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struct MemArena;
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/**
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* A version of #BLI_polyfill_calc that uses a memory arena to avoid re-allocations.
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*/
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void BLI_polyfill_calc_arena(const float (*coords)[2],
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unsigned int coords_num,
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int coords_sign,
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unsigned int (*r_tris)[3],
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struct MemArena *arena);
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/**
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* Triangulates the given (convex or concave) simple polygon to a list of triangle vertices.
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*
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* \param coords: 2D coordinates describing vertices of the polygon,
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* in either clockwise or counterclockwise order.
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* \param coords_num: Total points in the array.
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* \param coords_sign: Pass this when we know the sign in advance to avoid extra calculations.
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*
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* \param r_tris: This array is filled in with triangle indices in clockwise order.
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* The length of the array must be `coords_num - 2`.
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* Indices are guaranteed to be assigned to unique triangles, with valid indices,
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* even in the case of degenerate input (self intersecting polygons, zero area ears... etc).
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*/
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void BLI_polyfill_calc(const float (*coords)[2],
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unsigned int coords_num,
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int coords_sign,
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unsigned int (*r_tris)[3]);
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/* default size of polyfill arena */
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#define BLI_POLYFILL_ARENA_SIZE MEM_SIZE_OPTIMAL(1 << 14)
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