2 Copyright (C) 2003, 2010 - Wolfire Games
3 Copyright (C) 2010-2016 - Lugaru contributors (see AUTHORS file)
5 This file is part of Lugaru.
7 Lugaru is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 Lugaru is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with Lugaru. If not, see <http://www.gnu.org/licenses/>.
21 #include "Animation/Muscle.h"
22 #include "Utils/binio.h"
24 extern float multiplier;
37 rotate1 = 0, rotate2 = 0, rotate3 = 0;
38 lastrotate1 = 0, lastrotate2 = 0, lastrotate3 = 0;
39 oldrotate1 = 0, oldrotate2 = 0, oldrotate3 = 0;
40 newrotate1 = 0, newrotate2 = 0, newrotate3 = 0;
45 void Muscle::load(FILE* tfile, int vertexNum, std::vector<Joint>& joints)
47 int numvertices, vertice, parentID;
50 funpackf(tfile, "Bf Bf Bf Bf Bf Bi Bi", &length, &targetlength, &minlength, &maxlength, &strength, &type, &numvertices);
53 for (int j = 0; j < numvertices; j++) {
54 funpackf(tfile, "Bi", &vertice);
55 if (vertice < vertexNum) {
56 vertices.push_back(vertice);
61 funpackf(tfile, "Bb Bi", &visible, &parentID);
62 parent1 = &joints[parentID];
63 funpackf(tfile, "Bi", &parentID);
64 parent2 = &joints[parentID];
67 void Muscle::loadVerticesLow(FILE* tfile, int vertexNum)
69 int numvertices, vertice;
72 funpackf(tfile, "Bi", &numvertices);
75 for (int j = 0; j < numvertices; j++) {
76 funpackf(tfile, "Bi", &vertice);
77 if (vertice < vertexNum) {
78 verticeslow.push_back(vertice);
83 void Muscle::loadVerticesClothes(FILE* tfile, int vertexNum)
85 int numvertices, vertice;
88 funpackf(tfile, "Bi", &numvertices);
91 for (int j = 0; j < numvertices; j++) {
92 funpackf(tfile, "Bi", &vertice);
93 if (vertice < vertexNum) {
94 verticesclothes.push_back(vertice);
101 * sets strength, length,
102 * parent1->position, parent2->position,
103 * parent1->velocity, parent2->velocity
107 * Skeleton::DoConstraints
109 void Muscle::DoConstraint(bool spinny)
111 // FIXME: relaxlength shouldn't be static, but may not always be set
112 // so I don't want to change the existing behavior even though it's probably a bug
113 static float relaxlength;
115 float oldlength = length;
117 if (type != boneconnect) {
118 relaxlength = findDistance(&parent1->position, &parent2->position);
121 if (type == boneconnect) {
124 if (type == constraint) {
134 length -= (length - relaxlength) * (1 - strength) * multiplier * 10000;
135 length -= (length - targetlength) * (strength) * multiplier * 10000;
137 length = relaxlength;
139 if ((relaxlength - length > 0 && relaxlength - oldlength < 0) || (relaxlength - length < 0 && relaxlength - oldlength > 0))
140 length = relaxlength;
143 if (length < minlength)
145 if (length > maxlength)
148 if (length == relaxlength)
154 XYZ midp = (parent1->position * parent1->mass + parent2->position * parent2->mass) / (parent1->mass + parent2->mass);
156 //Find vector from midpoint to second vector
157 XYZ vel = parent2->position - midp;
159 //Change to unit vector
162 //Apply velocity change
163 XYZ newpoint1 = midp - vel * length * (parent2->mass / (parent1->mass + parent2->mass));
164 XYZ newpoint2 = midp + vel * length * (parent1->mass / (parent1->mass + parent2->mass));
165 if (!freeze && spinny) {
166 parent1->velocity = parent1->velocity + (newpoint1 - parent1->position) / multiplier / 4;
167 parent2->velocity = parent2->velocity + (newpoint2 - parent2->position) / multiplier / 4;
169 parent1->velocity = parent1->velocity + (newpoint1 - parent1->position);
170 parent2->velocity = parent2->velocity + (newpoint2 - parent2->position);
173 //Move child point to within certain distance of parent point
174 parent1->position = newpoint1;
175 parent2->position = newpoint2;