1 /* Copyright (c) 2013 Scott Lembcke and Howling Moon Software
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4 * of this software and associated documentation files (the "Software"), to deal
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13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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22 /// @defgroup cpDampedSpring cpDampedSpring
25 /// Check if a constraint is a slide joint.
26 CP_EXPORT cpBool cpConstraintIsDampedSpring(const cpConstraint *constraint);
28 /// Function type used for damped spring force callbacks.
29 typedef cpFloat (*cpDampedSpringForceFunc)(cpConstraint *spring, cpFloat dist);
31 /// Allocate a damped spring.
32 CP_EXPORT cpDampedSpring* cpDampedSpringAlloc(void);
33 /// Initialize a damped spring.
34 CP_EXPORT cpDampedSpring* cpDampedSpringInit(cpDampedSpring *joint, cpBody *a, cpBody *b, cpVect anchorA, cpVect anchorB, cpFloat restLength, cpFloat stiffness, cpFloat damping);
35 /// Allocate and initialize a damped spring.
36 CP_EXPORT cpConstraint* cpDampedSpringNew(cpBody *a, cpBody *b, cpVect anchorA, cpVect anchorB, cpFloat restLength, cpFloat stiffness, cpFloat damping);
38 /// Get the location of the first anchor relative to the first body.
39 CP_EXPORT cpVect cpDampedSpringGetAnchorA(const cpConstraint *constraint);
40 /// Set the location of the first anchor relative to the first body.
41 CP_EXPORT void cpDampedSpringSetAnchorA(cpConstraint *constraint, cpVect anchorA);
43 /// Get the location of the second anchor relative to the second body.
44 CP_EXPORT cpVect cpDampedSpringGetAnchorB(const cpConstraint *constraint);
45 /// Set the location of the second anchor relative to the second body.
46 CP_EXPORT void cpDampedSpringSetAnchorB(cpConstraint *constraint, cpVect anchorB);
48 /// Get the rest length of the spring.
49 CP_EXPORT cpFloat cpDampedSpringGetRestLength(const cpConstraint *constraint);
50 /// Set the rest length of the spring.
51 CP_EXPORT void cpDampedSpringSetRestLength(cpConstraint *constraint, cpFloat restLength);
53 /// Get the stiffness of the spring in force/distance.
54 CP_EXPORT cpFloat cpDampedSpringGetStiffness(const cpConstraint *constraint);
55 /// Set the stiffness of the spring in force/distance.
56 CP_EXPORT void cpDampedSpringSetStiffness(cpConstraint *constraint, cpFloat stiffness);
58 /// Get the damping of the spring.
59 CP_EXPORT cpFloat cpDampedSpringGetDamping(const cpConstraint *constraint);
60 /// Set the damping of the spring.
61 CP_EXPORT void cpDampedSpringSetDamping(cpConstraint *constraint, cpFloat damping);
63 /// Get the damping of the spring.
64 CP_EXPORT cpDampedSpringForceFunc cpDampedSpringGetSpringForceFunc(const cpConstraint *constraint);
65 /// Set the damping of the spring.
66 CP_EXPORT void cpDampedSpringSetSpringForceFunc(cpConstraint *constraint, cpDampedSpringForceFunc springForceFunc);