X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=dosdemo;a=blobdiff_plain;f=tools%2Fropesim%2Fsrc%2Fropesim.h;fp=tools%2Fropesim%2Fsrc%2Fropesim.h;h=f75e71b7cf98a8e24519b9b49cf40d00e67f2155;hp=0000000000000000000000000000000000000000;hb=c4e738daa32d1949f2d5c6fc62237760fb8aac68;hpb=91571f90a9120404bc40a868a66d91ce4ce29580

diff --git a/tools/ropesim/src/ropesim.h b/tools/ropesim/src/ropesim.h
new file mode 100644
index 0000000..f75e71b
--- /dev/null
+++ b/tools/ropesim/src/ropesim.h
@@ -0,0 +1,58 @@
+#ifndef ROPESIM_H_
+#define ROPESIM_H_
+
+#include "cgmath/cgmath.h"
+
+struct rsim_mass {
+	cgm_vec3 p;
+	cgm_vec3 v;
+	float m;
+	int fixed;
+
+	/* used for stringing fixed masses together */
+	struct rsim_mass *next;
+};
+
+struct rsim_spring {
+	float rest_len, k;
+	struct rsim_mass *mass[2];
+};
+
+struct rsim_rope {
+	struct rsim_mass *masses;
+	int num_masses;
+	struct rsim_spring *springs;
+	int num_springs;
+
+	/* elements of the masses array which are fixed */
+	struct rsim_mass *fixedlist;
+
+	struct rsim_rope *next;
+};
+
+struct rsim_world {
+	struct rsim_rope *ropes;	/* list of ropes to simulate */
+
+	cgm_vec3 grav, extforce;
+	float damping;
+
+	float udt;	/* microstepping delta (valid if > 0) */
+	float udelta_acc;	/* dt leftover accumulator for microstepping */
+};
+
+int rsim_init(struct rsim_world *rsim);
+void rsim_destroy(struct rsim_world *rsim);
+
+int rsim_add_rope(struct rsim_world *rsim, struct rsim_rope *rope);
+
+void rsim_step(struct rsim_world *rsim, float dt);
+
+struct rsim_rope *rsim_alloc_rope(int nmasses, int nsprings);
+void rsim_free_rope(struct rsim_rope *rope);
+int rsim_init_rope(struct rsim_rope *rope, int nmasses, int nsprings);
+void rsim_destroy_rope(struct rsim_rope *rope);
+
+int rsim_freeze_rope_mass(struct rsim_rope *rope, struct rsim_mass *m);
+int rsim_unfreeze_rope_mass(struct rsim_rope *rope, struct rsim_mass *m);
+
+#endif	/* ROPESIM_H_ */