X-FUNCTION: Status XUngrabPointer ( Display* display, Time time ) ;
X-FUNCTION: Status XChangeActivePointerGrab ( Display* display, uint event_mask, Cursor cursor, Time time ) ;
X-FUNCTION: Status XGrabKey ( Display* display, int keycode, uint modifiers, Window grab_window, Bool owner_events, int pointer_mode, int keyboard_mode ) ;
+X-FUNCTION: int XGrabKeyboard ( Display* display, Window grab_window, Bool owner_events, int pointer_mode, int keyboard_mode, Time time ) ;
X-FUNCTION: Status XSetInputFocus ( Display* display, Window focus, int revert_to, Time time ) ;
X-FUNCTION: Status XGetInputFocus ( Display* display,
+! See http://factorcode.org/license.txt for BSD license.
+USING: help.markup help.syntax math ;
+IN: math.splines
+
+HELP: <bezier-curve>
+{ $values
+ { "control-points" "sequence of control points same dimension" }
+ { "polynomials" "sequence of polynomials for each dimension" }
+}
+{ $description "Creates bezier curve polynomials for the given control points." } ;
+
+HELP: <catmull-rom-spline>
+{ $values
+ { "points" "points on the spline" } { "m0" "initial tangent vector" } { "mn" "final tangent vector" }
+ { "polynomials-sequence" "sequence of sequences of polynomials" }
+}
+{ $description "Creates a sequence of cubic hermite curves (each a sequence of polynomials) passing through the given points and generating tangents for C1 continuity." } ;
+{ $description "Creates a sequence of polynomials (one per dimension) for the curve passing through " { $emphasis "p0" } " and " { $emphasis "p1" } "." } ;
+
+HELP: <cubic-hermite-spline>
+{ $values
+ { "point-tangent-pairs" "sequence of point and tangent pairs" }
+ { "polynomials-sequence" "sequence of sequences of polynomials" }
+}
+{ $description "Creates a sequence of cubic hermite curves (each a sequence of polynomials) passing through the given points with the given tangents." } ;
+
+HELP: <kochanek-bartels-curve>
+{ $values
+ { "points" "points on the spline" } { "m0" "start tangent" } { "mn" "end tangent" } { "tension" number } { "bias" number } { "continuity" number }
+ { "polynomials-sequence" "sequence of sequence of polynomials" }
+}
+{ $description "Creates a sequence of cubic hermite curves (each a sequence of polynomials) passing through the given points, generating tangents with the given tuning parameters." } ;
+"The curve creating functions create sequences of polynomials, one for each degree of the input points. The spline creating functions create sequences of these curve polynomial sequences. The " { $vocab-link "math.splines.viewer" } " vocabulary provides a gadget to evaluate the generated polynomials and view the results.";