246 lines
9.4 KiB
C
246 lines
9.4 KiB
C
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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 this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) Blender Foundation.
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s): Daniel Genrich
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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#ifndef __BKE_CLOTH_H__
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#define __BKE_CLOTH_H__
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/** \file BKE_cloth.h
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* \ingroup bke
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* \author Daniel Genrich
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*/
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#include <float.h>
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#include "BLI_math_inline.h"
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struct Object;
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struct Scene;
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struct MFace;
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struct DerivedMesh;
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struct ClothModifierData;
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struct CollisionModifierData;
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#define DO_INLINE MALWAYS_INLINE
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/* goal defines */
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#define SOFTGOALSNAP 0.999f
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/* This is approximately the smallest number that can be
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* represented by a float, given its precision. */
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#define ALMOST_ZERO FLT_EPSILON
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/* Bits to or into the ClothVertex.flags. */
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typedef enum eClothVertexFlag {
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CLOTH_VERT_FLAG_PINNED = 1,
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CLOTH_VERT_FLAG_NOSELFCOLL = 2, /* vertex NOT used for self collisions */
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} eClothVertexFlag;
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typedef struct ClothHairData {
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float loc[3];
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float rot[3][3];
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float rest_target[3]; /* rest target direction for each segment */
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float radius;
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float bending_stiffness;
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} ClothHairData;
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typedef struct ClothSolverResult {
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int status;
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int max_iterations, min_iterations;
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float avg_iterations;
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float max_error, min_error, avg_error;
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} ClothSolverResult;
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/**
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* This structure describes a cloth object against which the
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* simulation can run.
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*
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* The m and n members of this structure represent the assumed
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* rectangular ordered grid for which the original paper is written.
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* At some point they need to disappear and we need to determine out
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* own connectivity of the mesh based on the actual edges in the mesh.
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*
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*/
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typedef struct Cloth {
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struct ClothVertex *verts; /* The vertices that represent this cloth. */
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struct LinkNode *springs; /* The springs connecting the mesh. */
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unsigned int numsprings; /* The count of springs. */
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unsigned int mvert_num; /* The number of verts == m * n. */
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unsigned int tri_num;
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unsigned char old_solver_type; /* unused, only 1 solver here */
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unsigned char pad2;
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short pad3;
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struct BVHTree *bvhtree; /* collision tree for this cloth object */
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struct BVHTree *bvhselftree; /* collision tree for this cloth object */
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struct MVertTri *tri;
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struct Implicit_Data *implicit; /* our implicit solver connects to this pointer */
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struct EdgeSet *edgeset; /* used for selfcollisions */
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int last_frame, pad4;
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} Cloth;
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/**
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* The definition of a cloth vertex.
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*/
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typedef struct ClothVertex {
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int flags; /* General flags per vertex. */
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float v[3]; /* The velocity of the point. */
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float xconst[3]; /* constrained position */
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float x[3]; /* The current position of this vertex. */
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float xold[3]; /* The previous position of this vertex.*/
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float tx[3]; /* temporary position */
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float txold[3]; /* temporary old position */
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float tv[3]; /* temporary "velocity", mostly used as tv = tx-txold */
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float mass; /* mass / weight of the vertex */
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float goal; /* goal, from SB */
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float impulse[3]; /* used in collision.c */
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float xrest[3]; /* rest position of the vertex */
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unsigned int impulse_count; /* same as above */
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float avg_spring_len; /* average length of connected springs */
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float struct_stiff;
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float bend_stiff;
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float shear_stiff;
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int spring_count; /* how many springs attached? */
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float shrink_factor; /* how much to shrink this cloth */
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}
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ClothVertex;
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/**
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* The definition of a spring.
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*/
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typedef struct ClothSpring {
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int ij; /* Pij from the paper, one end of the spring. */
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int kl; /* Pkl from the paper, one end of the spring. */
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int mn;
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float restlen; /* The original length of the spring. */
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int type; /* types defined in BKE_cloth.h ("springType") */
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int flags; /* defined in BKE_cloth.h, e.g. deactivated due to tearing */
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float stiffness; /* stiffness factor from the vertex groups */
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float editrestlen;
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/* angular bending spring target and derivatives */
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float target[3];
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}
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ClothSpring;
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// some macro enhancements for vector treatment
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#define VECADDADD(v1,v2,v3) {*(v1)+= *(v2) + *(v3); *(v1+1)+= *(v2+1) + *(v3+1); *(v1+2)+= *(v2+2) + *(v3+2);}
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#define VECSUBADD(v1,v2,v3) {*(v1)-= *(v2) + *(v3); *(v1+1)-= *(v2+1) + *(v3+1); *(v1+2)-= *(v2+2) + *(v3+2);}
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#define VECADDSUB(v1,v2,v3) {*(v1)+= *(v2) - *(v3); *(v1+1)+= *(v2+1) - *(v3+1); *(v1+2)+= *(v2+2) - *(v3+2);}
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#define VECSUBADDSS(v1,v2,aS,v3,bS) {*(v1)-= *(v2)*aS + *(v3)*bS; *(v1+1)-= *(v2+1)*aS + *(v3+1)*bS; *(v1+2)-= *(v2+2)*aS + *(v3+2)*bS;}
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#define VECADDSUBSS(v1,v2,aS,v3,bS) {*(v1)+= *(v2)*aS - *(v3)*bS; *(v1+1)+= *(v2+1)*aS - *(v3+1)*bS; *(v1+2)+= *(v2+2)*aS - *(v3+2)*bS;}
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#define VECADDSS(v1,v2,aS,v3,bS) {*(v1)= *(v2)*aS + *(v3)*bS; *(v1+1)= *(v2+1)*aS + *(v3+1)*bS; *(v1+2)= *(v2+2)*aS + *(v3+2)*bS;}
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#define VECADDS(v1,v2,v3,bS) {*(v1)= *(v2) + *(v3)*bS; *(v1+1)= *(v2+1) + *(v3+1)*bS; *(v1+2)= *(v2+2) + *(v3+2)*bS;}
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#define VECSUBMUL(v1,v2,aS) {*(v1)-= *(v2) * aS; *(v1+1)-= *(v2+1) * aS; *(v1+2)-= *(v2+2) * aS;}
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#define VECSUBS(v1,v2,v3,bS) {*(v1)= *(v2) - *(v3)*bS; *(v1+1)= *(v2+1) - *(v3+1)*bS; *(v1+2)= *(v2+2) - *(v3+2)*bS;}
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#define VECSUBSB(v1,v2, v3,bS) {*(v1)= (*(v2)- *(v3))*bS; *(v1+1)= (*(v2+1) - *(v3+1))*bS; *(v1+2)= (*(v2+2) - *(v3+2))*bS;}
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#define VECMULS(v1,aS) {*(v1)*= aS; *(v1+1)*= aS; *(v1+2)*= *aS;}
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#define VECADDMUL(v1,v2,aS) {*(v1)+= *(v2) * aS; *(v1+1)+= *(v2+1) * aS; *(v1+2)+= *(v2+2) * aS;}
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/* SIMULATION FLAGS: goal flags,.. */
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/* These are the bits used in SimSettings.flags. */
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typedef enum {
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CLOTH_SIMSETTINGS_FLAG_COLLOBJ = ( 1 << 2 ),// object is only collision object, no cloth simulation is done
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CLOTH_SIMSETTINGS_FLAG_GOAL = ( 1 << 3 ), // we have goals enabled
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CLOTH_SIMSETTINGS_FLAG_TEARING = ( 1 << 4 ),// true if tearing is enabled
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CLOTH_SIMSETTINGS_FLAG_SCALING = ( 1 << 8 ), /* is advanced scaling active? */
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CLOTH_SIMSETTINGS_FLAG_CCACHE_EDIT = (1 << 12), /* edit cache in editmode */
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CLOTH_SIMSETTINGS_FLAG_NO_SPRING_COMPRESS = (1 << 13), /* don't allow spring compression */
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CLOTH_SIMSETTINGS_FLAG_SEW = (1 << 14), /* pull ends of loose edges together */
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CLOTH_SIMSETTINGS_FLAG_DYNAMIC_BASEMESH = (1 << 15), /* make simulation respect deformations in the base object */
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} CLOTH_SIMSETTINGS_FLAGS;
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/* COLLISION FLAGS */
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typedef enum {
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CLOTH_COLLSETTINGS_FLAG_ENABLED = ( 1 << 1 ), /* enables cloth - object collisions */
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CLOTH_COLLSETTINGS_FLAG_SELF = ( 1 << 2 ), /* enables selfcollisions */
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} CLOTH_COLLISIONSETTINGS_FLAGS;
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/* Spring types as defined in the paper.*/
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typedef enum {
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CLOTH_SPRING_TYPE_STRUCTURAL = (1 << 1),
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CLOTH_SPRING_TYPE_SHEAR = (1 << 2),
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CLOTH_SPRING_TYPE_BENDING = (1 << 3),
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CLOTH_SPRING_TYPE_GOAL = (1 << 4),
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CLOTH_SPRING_TYPE_SEWING = (1 << 5),
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CLOTH_SPRING_TYPE_BENDING_ANG = (1 << 6),
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} CLOTH_SPRING_TYPES;
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/* SPRING FLAGS */
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typedef enum {
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CLOTH_SPRING_FLAG_DEACTIVATE = ( 1 << 1 ),
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CLOTH_SPRING_FLAG_NEEDED = ( 1 << 2 ), // springs has values to be applied
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} CLOTH_SPRINGS_FLAGS;
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/////////////////////////////////////////////////
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// collision.c
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////////////////////////////////////////////////
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struct CollPair;
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typedef struct ColliderContacts {
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struct Object *ob;
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struct CollisionModifierData *collmd;
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struct CollPair *collisions;
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int totcollisions;
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} ColliderContacts;
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// needed for implicit.c
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int cloth_bvh_objcollision (struct Object *ob, struct ClothModifierData *clmd, float step, float dt );
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int cloth_points_objcollision(struct Object *ob, struct ClothModifierData *clmd, float step, float dt);
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void cloth_find_point_contacts(struct Object *ob, struct ClothModifierData *clmd, float step, float dt,
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ColliderContacts **r_collider_contacts, int *r_totcolliders);
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void cloth_free_contacts(ColliderContacts *collider_contacts, int totcolliders);
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////////////////////////////////////////////////
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/////////////////////////////////////////////////
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// cloth.c
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////////////////////////////////////////////////
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// needed for modifier.c
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void cloth_free_modifier_extern (struct ClothModifierData *clmd );
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void cloth_free_modifier (struct ClothModifierData *clmd );
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void cloth_init (struct ClothModifierData *clmd );
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void clothModifier_do (struct ClothModifierData *clmd, struct Scene *scene, struct Object *ob, struct DerivedMesh *dm, float (*vertexCos)[3]);
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int cloth_uses_vgroup(struct ClothModifierData *clmd);
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// needed for collision.c
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void bvhtree_update_from_cloth(struct ClothModifierData *clmd, bool moving);
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void bvhselftree_update_from_cloth(struct ClothModifierData *clmd, bool moving);
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// needed for button_object.c
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void cloth_clear_cache (struct Object *ob, struct ClothModifierData *clmd, float framenr );
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void cloth_parallel_transport_hair_frame(float mat[3][3], const float dir_old[3], const float dir_new[3]);
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////////////////////////////////////////////////
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#endif
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