v0.1
This commit is contained in:
Regalis
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Xml.Linq;
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using FarseerPhysics;
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using FarseerPhysics.Collision.Shapes;
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using FarseerPhysics.Common;
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using FarseerPhysics.Dynamics;
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using FarseerPhysics.Dynamics.Joints;
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using FarseerPhysics.Factories;
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using Microsoft.Xna.Framework;
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using Microsoft.Xna.Framework.Graphics;
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namespace Subsurface.Items.Components
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{
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class Rope : ItemComponent
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{
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PhysicsBody[] ropeBodies;
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RevoluteJoint[] ropeJoints;
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DistanceJoint gunJoint;
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float pullForce;
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Sprite sprite;
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float reload;
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float prevDir;
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float sectionLength;
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Item projectile;
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Vector2 projectileAnchor;
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private Vector2 BarrelPos
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{
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get
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{
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Vector2 barrelPos = Vector2.Zero;
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//RangedWeapon weapon = item.GetComponent<RangedWeapon>();
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//if (weapon != null) barrelPos = weapon.barrelPos;
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return barrelPos;
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}
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}
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private Vector2 TransformedBarrelPos
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{
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get
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{
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Vector2 barrelPos = Vector2.Zero;
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RangedWeapon weapon = item.GetComponent<RangedWeapon>();
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if (weapon != null) barrelPos = weapon.TransformedBarrelPos;
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return barrelPos;
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}
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}
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public Rope(Item item, XElement element)
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: base(item, element)
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{
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string spritePath = ToolBox.GetAttributeString(element, "sprite", "");
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if (spritePath == "") DebugConsole.ThrowError("Sprite "+spritePath+" in "+element+" not found!");
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float length = ConvertUnits.ToSimUnits(ToolBox.GetAttributeFloat(element, "length", 200.0f));
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pullForce = ToolBox.GetAttributeFloat(element, "pullforce", 10.0f);
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projectileAnchor = Vector2.Zero;
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projectileAnchor.X = ToolBox.GetAttributeFloat(element, "projectileanchorx", 0.0f);
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projectileAnchor.Y = ToolBox.GetAttributeFloat(element, "projectileanchory", 0.0f);
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projectileAnchor = ConvertUnits.ToSimUnits(projectileAnchor);
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characterUsable = ToolBox.GetAttributeBool(element, "characterusable", false);
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sprite = new Sprite(spritePath, new Vector2(0.5f,0.5f));
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sectionLength = ConvertUnits.ToSimUnits(sprite.size.X);
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Path ropePath = new Path();
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ropePath.Add(item.body.Position);
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ropePath.Add(item.body.Position + new Vector2(length, 0.0f));
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ropePath.Closed = false;
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Vertices box = PolygonTools.CreateRectangle(sectionLength, 0.05f);
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PolygonShape shape = new PolygonShape(box, 5);
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List<Body>ropeList = PathManager.EvenlyDistributeShapesAlongPath(Game1.World, ropePath, shape, BodyType.Dynamic, (int)(length/sectionLength));
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ropeBodies = new PhysicsBody[ropeList.Count()];
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for (int i = 0; i<ropeBodies.Length; i++)
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{
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ropeList[i].Mass = 0.01f;
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ropeList[i].Enabled = false;
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//only collide with the map
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ropeList[i].CollisionCategories = Physics.CollisionMisc;
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ropeList[i].CollidesWith = Physics.CollisionWall;
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ropeBodies[i] = new PhysicsBody(ropeList[i]);
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}
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List<RevoluteJoint> joints = PathManager.AttachBodiesWithRevoluteJoint(Game1.World, ropeList,
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new Vector2(-sectionLength/2, 0.0f), new Vector2(sectionLength/2, 0.0f), false, false);
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ropeJoints = new RevoluteJoint[joints.Count+1];
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//ropeJoints[0] = JointFactory.CreateRevoluteJoint(Game1.world, item.body, ropeList[0], new Vector2(0f, -0.0f));
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for (int i = 0; i < joints.Count; i++)
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{
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var distanceJoint = JointFactory.CreateDistanceJoint(Game1.World, ropeList[i], ropeList[i + 1]);
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distanceJoint.Length = sectionLength;
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distanceJoint.DampingRatio = 1.0f;
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ropeJoints[i] = joints[i];
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}
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}
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public override void SecondaryUse(float deltaTime, Character character = null)
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{
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if (reload > 0.0f) return;
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bool first = true;
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for (int i = 0; i < ropeBodies.Length - 1; i++)
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{
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if (ropeBodies[i].UserData == null || (bool)ropeBodies[i].UserData) continue;
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if (first)
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{
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Vector2 dist = gunJoint.WorldAnchorA - ropeJoints[i].WorldAnchorA;
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float length = dist.Length();
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if (gunJoint.Length < 0.011 && length*0.5f<sectionLength)
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{
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NextSection(i);
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}
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else
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{
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gunJoint.Length = Math.Max(gunJoint.Length-0.01f,0.01f);
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gunJoint.Frequency = 30;
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gunJoint.DampingRatio = 0.05f;
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//gunJoint.MotorEnabled = true;
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//gunJoint.MotorSpeed = -150.0f;
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//ropeBodies[i + 1].ApplyForce(dist / length * pullForce);
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//ropeJoints[0].LocalAnchorA = new Vector2(ropeJoints[0].LocalAnchorA.X-0.05f,ropeJoints[0].LocalAnchorA.Y);
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//ropeBodies[i].SmoothRotate(item.body.Rotation);
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}
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first = false;
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}
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else
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{
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//Vector2 dist = ropeBodies[i].Position - ropeBodies[i + 1].Position;
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//float length = dist.Length();
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//ropeBodies[i + 1].ApplyForce(dist / length * pullForce * 0.1f);
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}
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}
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}
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private void NextSection(int i)
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{
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gunJoint.Length = sectionLength;
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ropeBodies[i].UserData = true;
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ropeBodies[i].Enabled = false;
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//if (ropeJoints[0] != null) Game1.world.RemoveJoint(ropeJoints[0]);
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//ropeJoints[0] = JointFactory.CreateRevoluteJoint(Game1.world,
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// item.body.FarseerBody, ropeBodies[i + 1].FarseerBody,
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// BarrelPos, new Vector2(-sectionLength / 2, 0.0f));
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AttachGunJoint(ropeBodies[i + 1].FarseerBody);
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if (i == ropeBodies.Length - 2)
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{
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item.Combine(projectile);
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ropeBodies[ropeBodies.Length - 1].Enabled = false;
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isActive = false;
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}
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}
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public override void Update(float deltaTime, Camera cam)
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{
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if (reload>0.0f) reload -= deltaTime;
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//for (int i = 0; i < ropeBodies.Length - 1; i++)
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//{
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// if (ropeBodies[i].UserData == null || (bool)ropeBodies[i].UserData == true) continue;
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// ropeBodies[i].SmoothRotate(item.body.Rotation);
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//}
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int len = 1;
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for (int i = 0; i < ropeBodies.Length - 1; i++)
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{
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if (ropeBodies[i].UserData == null || (bool)ropeBodies[i].UserData) continue;
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len++;
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}
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if (Vector2.Distance(TransformedBarrelPos, projectile.SimPosition)>len*sectionLength)
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{
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Vector2 stopForce = projectile.SimPosition - ropeBodies[ropeBodies.Length-1].Position;
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stopForce = Vector2.Normalize(stopForce);
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float dotProduct = Vector2.Dot(stopForce, Vector2.Normalize(projectile.body.LinearVelocity));
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if (dotProduct<0)
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projectile.body.ApplyLinearImpulse(-stopForce*dotProduct * projectile.body.LinearVelocity.Length() * projectile.body.Mass);
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}
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if (item.body.Dir!=prevDir)
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{
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gunJoint.LocalAnchorA =
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new Vector2(
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-gunJoint.LocalAnchorA.X,
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BarrelPos.Y);
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prevDir = -prevDir;
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}
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if (!projectile.body.Enabled || !item.body.Enabled)
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{
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//attempt to recontain the projectile in the launcher
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//eq automatically reload a spear into a speargun when picking the spear up
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if (!projectile.body.Enabled) item.Combine(projectile);
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foreach (PhysicsBody b in ropeBodies)
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{
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b.Enabled = false;
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}
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foreach (var joint in ropeJoints)
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{
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if (joint != null) joint.Enabled = false;
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}
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isActive = false;
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}
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}
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public override void Draw(SpriteBatch spriteBatch, bool editing)
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{
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base.Draw(spriteBatch);
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if (!isActive) return;
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RevoluteJoint firstJoint = null;
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for (int i = 0; i<ropeBodies.Length-1; i++)
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{
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if (!ropeBodies[i].Enabled) continue;
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if (firstJoint==null) firstJoint = ropeJoints[i];
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DrawSection(spriteBatch, ropeJoints[i].WorldAnchorA, ropeJoints[i+1].WorldAnchorA, i);
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}
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if (gunJoint == null || firstJoint==null) return;
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DrawSection(spriteBatch, gunJoint.WorldAnchorA, firstJoint.WorldAnchorA, 0);
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}
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private void DrawSection(SpriteBatch spriteBatch, Vector2 start, Vector2 end, int i)
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{
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start.Y = -start.Y;
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end.Y = -end.Y;
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spriteBatch.Draw(sprite.Texture,
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ConvertUnits.ToDisplayUnits(start), null, Color.White,
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MathUtils.VectorToAngle(end - start),
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new Vector2(0.0f, sprite.size.Y / 2.0f),
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new Vector2((ConvertUnits.ToDisplayUnits(Vector2.Distance(start, end))) / sprite.Texture.Width, 1.0f),
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SpriteEffects.None,
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sprite.Depth + i*0.00001f);
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}
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public void Attach(Item projectile)
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{
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reload = 0.5f;
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isActive = true;
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this.projectile = projectile;
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//Projectile projectileComponent = projectile.GetComponent<Projectile>();
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foreach (PhysicsBody b in ropeBodies)
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{
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b.SetTransform(item.body.Position, 0.0f);
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b.UserData = false;
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b.Enabled = true;
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}
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foreach (var joint in ropeJoints)
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{
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if (joint!=null) joint.Enabled = true;
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}
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ropeBodies[ropeBodies.Length - 1].SetTransform(projectile.body.Position, projectile.body.Rotation);
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//attach projectile to the last section of the rope
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if (ropeJoints[ropeJoints.Length-1] != null) Game1.World.RemoveJoint(ropeJoints[ropeJoints.Length-1]);
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ropeJoints[ropeJoints.Length - 1] = JointFactory.CreateRevoluteJoint(Game1.World,
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projectile.body.FarseerBody, ropeBodies[ropeBodies.Length - 1].FarseerBody,
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projectileAnchor, new Vector2(sectionLength / 2, 0.0f));
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AttachGunJoint(ropeBodies[0].FarseerBody);
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prevDir = item.body.Dir;
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}
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private void AttachGunJoint(Body body)
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{
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float rotation = (item.body.Dir == -1.0f) ? item.body.Rotation - MathHelper.Pi : item.body.Rotation;
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body.SetTransform(TransformedBarrelPos, rotation);
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//Vector2 axis = new Vector2((float)Math.Cos(rotation), (float)Math.Sin(rotation));
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if (gunJoint != null) Game1.World.RemoveJoint(gunJoint);
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gunJoint = new DistanceJoint(item.body.FarseerBody, body, BarrelPos,
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new Vector2(sectionLength / 2, 0.0f));
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gunJoint.Length = sectionLength;
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//gunJoint.LocalAnchorA = BarrelPos;
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//gunJoint.LocalAnchorB = new Vector2(sectionLength / 2, 0.0f);
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//gunJoint.UpperLimit = sectionLength;
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//gunJoint.LowerLimit = 0.0f;
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//gunJoint.LimitEnabled = true;
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//gunJoint.ReferenceAngle = 0.0f;
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Game1.World.AddJoint(gunJoint);
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}
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}
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}
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