1 files changed, 38 insertions, 0 deletions
diff --git a/src/test/scala/sims/test/gui/MouseJoint.scala b/src/test/scala/sims/test/gui/MouseJoint.scala
new file mode 100644
index 0000000..0d74dd5
--- /dev/null
+++ b/src/test/scala/sims/test/gui/MouseJoint.scala
@@ -0,0 +1,38 @@
+package sims.test.gui
+
+import sims.dynamics._
+import sims.dynamics.constraints._
+import sims.math._
+
+class MouseJoint(val body1: Body, var anchor: Vector2D) extends Joint {
+	val body2 = new Body() {fixed = true}
+	
+	private val self = this
+	
+	private val local1 = anchor - body1.position
+	
+	private val rotation01 = body1.rotation
+	
+	def r1 = (local1 rotate (body1.rotation - rotation01))
+	
+	def x1 = body1.position + r1
+	def x2 = anchor
+	
+	def x = x2 - x1
+	
+	val constraints = List(
+		new Constraint {
+			val body1 = self.body1
+			val body2 = self.body2
+			def value = x.x
+			def jacobian = new Jacobian(-Vector2D(1, 0), r1.y, Vector2D.i, 0)
+		},
+		new Constraint {
+			val body1 = self.body1
+			val body2 = self.body2
+			def value = x.y
+			def jacobian = new Jacobian(-Vector2D(0, 1), -r1.x, Vector2D.j, 0)
+		}
+	)
+	
+}
+\ No newline at end of file