added 3dengfx into the repo, probably not the correct version for this

[summerhack] / src / 3dengfx / src / sim / spring.cpp

diff --git a/src/3dengfx/src/sim/spring.cpp b/src/3dengfx/src/sim/spring.cpp
new file mode 100644 (file)
index 0000000..faf8a9e
--- /dev/null
+++ b/src/3dengfx/src/sim/spring.cpp
@@ -0,0 +1,79 @@
+/*
+This file is part of the simulation module of 3dengfx.
+
+Copyright (c) 2005 John Tsiombikas <nuclear@siggraph.org>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+/* Spring, not the season... the one with the -K
+ *
+ * Author: John Tsiombikas 2005
+ */
+
+#include "spring.hpp"
+
+SpringConn::spring_conn(const Vector3 &pos, bool fixed) {
+       this->fixed = fixed;
+       set_position(pos);
+       weight = 1.0;
+}
+
+void SpringConn::set_fixed(bool fixed) {
+       this->fixed = fixed;
+}
+
+bool SpringConn::is_fixed() const {
+       return fixed;
+}
+
+void SpringConn::set_weight(scalar_t weight) {
+       this->weight = weight;
+}
+
+scalar_t SpringConn::get_weight() const {
+       return weight;
+}
+
+
+Spring::Spring() {
+       stiffness = 1.0;
+       length = 1.0;
+       ends[0] = ends[1] = 0;
+}
+
+Spring::Spring(SpringConn *end1, SpringConn *end2, scalar_t k, scalar_t len) {
+       stiffness = k;
+       length = len;
+       ends[0] = end1;
+       ends[1] = end2;
+}
+
+void Spring::set_ends(SpringConn *end1, SpringConn *end2) {
+       ends[0] = end1;
+       ends[1] = end2;
+}
+
+void Spring::set_stiffness(scalar_t stiffness) {
+       this->stiffness = stiffness;
+}
+
+void Spring::set_length(scalar_t len) {
+       length = len;
+}
+
+Vector3 Spring::calc_force(int end) const {
+       return Vector3();
+}