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157c6af18e
Avoid cases of filenames Update years in terms and other legal(ish) documents Don't update years in license headers, since change is not meaningful Will add linter rule in seperate commit Happy recompiling everyone! Original Patch By: Nescio Comment By: Gallaecio Differential Revision: D2620 This was SVN commit r27786.
37 lines
1.5 KiB
C
37 lines
1.5 KiB
C
/* Copyright (C) 2009 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**** Decompose.h - Basic declarations ****/
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#ifndef INCLUDED_DECOMPOSE
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#define INCLUDED_DECOMPOSE
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typedef struct {float x, y, z, w;} Quat; /* Quaternion */
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enum QuatPart {X, Y, Z, W};
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typedef Quat HVect; /* Homogeneous 3D vector */
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typedef float HMatrix[4][4]; /* Right-handed, for column vectors */
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typedef struct {
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HVect t; /* Translation components */
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Quat q; /* Essential rotation */
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Quat u; /* Stretch rotation */
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HVect k; /* Stretch factors */
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float f; /* Sign of determinant */
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} AffineParts;
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float polar_decomp(HMatrix M, HMatrix Q, HMatrix S);
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HVect spect_decomp(HMatrix S, HMatrix U);
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Quat snuggle(Quat q, HVect *k);
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void decomp_affine(HMatrix A, AffineParts *parts);
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void invert_affine(AffineParts *parts, AffineParts *inverse);
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#endif
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