// Grab a rope
public void grabRope(int entityId, RopeComponent ropeComponent, Body ropeBody)
{
RopeGrabExclusionComponent ropeGrabExclusionComponent = EntityManager.getRopeGrabExclusionComponent(entityId);
if (ropeGrabExclusionComponent == null || !ropeGrabExclusionComponent.excludedRopeComponents.Contains(ropeComponent))
{
GroupComponent groupComponent = SystemManager.groupSystem.getGroupComponentContaining(entityId);
CharacterComponent characterComponent = EntityManager.getCharacterComponent(entityId);
int index = ropeComponent.bodies.IndexOf(ropeBody);
RevoluteJoint joint = JointFactory.CreateRevoluteJoint(SystemManager.physicsSystem.world, ropeBody, characterComponent.body, Vector2.Zero, Vector2.Zero);
RopeGrabComponent ropeGrabComponent = new RopeGrabComponent(entityId, ropeComponent, joint, (float)index);
EntityManager.addComponent(entityId, ropeGrabComponent);
if (groupComponent != null)
{
Formation activeFormation = groupComponent.activeFormation;
float maxPosition = ropeComponent.anchorBody.Position.X + 2f * groupComponent.entities.Count;
LimitedRangeFormation newFormation = new LimitedRangeFormation(groupComponent.entities, activeFormation.position, activeFormation.speed, float.MinValue, maxPosition);
ropeGrabComponent.formationToRemove = newFormation;
activeFormation.position = (ropeComponent.anchorBody.Position.X + maxPosition) * 0.5f;
groupComponent.addFormation(newFormation);
}
}
}
// Release a rope
public void releaseRope(int entityId, RopeGrabComponent ropeGrabComponent)
{
RopeGrabExclusionComponent ropeGrabExclusionComponent = EntityManager.getRopeGrabExclusionComponent(entityId);
GroupComponent groupComponent = SystemManager.groupSystem.getGroupComponentContaining(entityId);
if (ropeGrabExclusionComponent == null)
{
ropeGrabExclusionComponent = new RopeGrabExclusionComponent(entityId);
EntityManager.addComponent(entityId, ropeGrabExclusionComponent);
}
ropeGrabExclusionComponent.excludedRopeComponents.Add(ropeGrabComponent.ropeComponent);
EntityManager.removeComponent(entityId, ComponentType.RopeGrab);
if (groupComponent != null)
{
groupComponent.removeFormation(ropeGrabComponent.formationToRemove);
}
}
// Move along a grabbed rope
private void updateGrab(int entityId, RopeGrabComponent ropeGrabComponent, CharacterComponent characterBodyComponent)
{
Vector2 localAnchor;
Body body;
int oldIndex = (int)Math.Floor(ropeGrabComponent.progress);
int newIndex;
float fraction;
float segmentLength = 1.2f;
float progress = SystemManager.physicsSystem.isSlowMotion ? 0.025f : 0.05f;
SystemManager.physicsSystem.world.RemoveJoint(ropeGrabComponent.joint);
ropeGrabComponent.progress += progress;
newIndex = (int)Math.Floor(ropeGrabComponent.progress);
if (newIndex < 0 || newIndex > ropeGrabComponent.ropeComponent.bodies.Count - 1)
{
releaseRope(entityId, ropeGrabComponent);
}
else
{
fraction = ropeGrabComponent.progress - newIndex;
body = ropeGrabComponent.ropeComponent.bodies[newIndex];
localAnchor = new Vector2((fraction - 0.5f) * segmentLength, 0f);
ropeGrabComponent.joint = JointFactory.CreateRevoluteJoint(SystemManager.physicsSystem.world, body, characterBodyComponent.body, localAnchor, Vector2.Zero);
}
}