Remove incomplete Inverse Kinematic module

The plan is to implement IK properly in the core engine for version 3.1,
together with ragdolls in the Skeleton node to let them reuse the same
limits and constraints.

Therefore we remove this module as part of the API breakage in 3.0, so
that we are not limited by staying compatible with it in 3.1.

1 files changed, 0 insertions, 326 deletions

diff --git a/modules/ik/ik.cpp b/modules/ik/ik.cpp
deleted file mode 100644
index 35b3ba7e83..0000000000
--- a/modules/ik/ik.cpp
+++ /dev/null
@@ -1,326 +0,0 @@
-/*************************************************************************/
-/*  ik.cpp                                                               */
-/* Copyright (c) 2016 Sergey Lapin <slapinid@gmail.com>                  */
-/*************************************************************************/
-/*                       This file is part of:                           */
-/*                           GODOT ENGINE                                */
-/*                    http://www.godotengine.org                         */
-/*************************************************************************/
-/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.                 */
-/*                                                                       */
-/* Permission is hereby granted, free of charge, to any person obtaining */
-/* a copy of this software and associated documentation files (the       */
-/* "Software"), to deal in the Software without restriction, including   */
-/* without limitation the rights to use, copy, modify, merge, publish,   */
-/* distribute, sublicense, and/or sell copies of the Software, and to    */
-/* permit persons to whom the Software is furnished to do so, subject to */
-/* the following conditions:                                             */
-/*                                                                       */
-/* The above copyright notice and this permission notice shall be        */
-/* included in all copies or substantial portions of the Software.       */
-/*                                                                       */
-/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
-/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
-/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
-/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
-/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
-/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
-/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
-/*************************************************************************/
-
-#include "ik.h"
-
-bool InverseKinematics::_get(const StringName& p_name,Variant &r_ret) const
-{
-
-	if (String(p_name)=="ik_bone") {
-
-		r_ret=get_bone_name();
-		return true;
-	}
-
-	return false;
-}
-
-bool InverseKinematics::_set(const StringName& p_name, const Variant& p_value)
-{
-
-	if (String(p_name)=="ik_bone") {
-
-		set_bone_name(p_value);
-		changed = true;
-		return true;
-	}
-
-	return false;
-}
-
-void InverseKinematics::_get_property_list( List<PropertyInfo>* p_list ) const
-{
-
-	Skeleton *parent=NULL;
-	if(get_parent())
-		parent=get_parent()->cast_to<Skeleton>();
-
-	if (parent) {
-
-		String names;
-		for(int i=0;i<parent->get_bone_count();i++) {
-			if(i>0)
-				names+=",";
-			names+=parent->get_bone_name(i);
-		}
-
-		p_list->push_back(PropertyInfo(Variant::STRING,"ik_bone",PROPERTY_HINT_ENUM,names));
-	} else {
-
-		p_list->push_back(PropertyInfo(Variant::STRING,"ik_bone"));
-
-	}
-
-}
-
-void InverseKinematics::_check_bind()
-{
-
-	if (get_parent() && get_parent()->cast_to<Skeleton>()) {
-		Skeleton *sk = get_parent()->cast_to<Skeleton>();
-		int idx = sk->find_bone(ik_bone);
-		if (idx!=-1) {
-			ik_bone_no = idx;
-			bound=true;
-		}
-		skel = sk;
-	}
-}
-
-void InverseKinematics::_check_unbind()
-{
-
-	if (bound) {
-
-		if (get_parent() && get_parent()->cast_to<Skeleton>()) {
-			Skeleton *sk = get_parent()->cast_to<Skeleton>();
-			int idx = sk->find_bone(ik_bone);
-			if (idx!=-1)
-				ik_bone_no = idx;
-			else
-				ik_bone_no = 0;
-			skel = sk;
-
-		}
-		bound=false;
-	}
-}
-
-
-void InverseKinematics::set_bone_name(const String& p_name)
-{
-
-	if (is_inside_tree())
-		_check_unbind();
-
-	ik_bone=p_name;
-
-	if (is_inside_tree())
-		_check_bind();
-	changed = true;
-}
-
-String InverseKinematics::get_bone_name() const
-{
-
-	return ik_bone;
-}
-
-void InverseKinematics::set_iterations(int itn)
-{
-
-	if (is_inside_tree())
-		_check_unbind();
-
-	iterations=itn;
-
-	if (is_inside_tree())
-		_check_bind();
-	changed = true;
-}
-
-int InverseKinematics::get_iterations() const
-{
-
-	return iterations;
-}
-
-void InverseKinematics::set_chain_size(int cs)
-{
-	if (is_inside_tree())
-		_check_unbind();
-
-	chain_size=cs;
-	chain.clear();
-	if (bound)
-		update_parameters();
-
-	if (is_inside_tree())
-		_check_bind();
-	changed = true;
-}
-
-int InverseKinematics::get_chain_size() const
-{
-
-	return chain_size;
-}
-
-void InverseKinematics::set_precision(float p)
-{
-
-	if (is_inside_tree())
-		_check_unbind();
-
-	precision=p;
-
-	if (is_inside_tree())
-		_check_bind();
-	changed = true;
-}
-
-float InverseKinematics::get_precision() const
-{
-
-	return precision;
-}
-
-void InverseKinematics::set_speed(float p)
-{
-
-	if (is_inside_tree())
-		_check_unbind();
-
-	speed=p;
-
-	if (is_inside_tree())
-		_check_bind();
-	changed = true;
-}
-
-float InverseKinematics::get_speed() const
-{
-
-	return speed;
-}
-
-void InverseKinematics::update_parameters()
-{
-	tail_bone = -1;
-	for (int i = 0; i < skel->get_bone_count(); i++)
-		if (skel->get_bone_parent(i) == ik_bone_no)
-			tail_bone = i;
-	int cur_bone = ik_bone_no;
-	int its = chain_size;
-	while (its > 0 && cur_bone >= 0) {
-		chain.push_back(cur_bone);
-		cur_bone = skel->get_bone_parent(cur_bone);
-		its--;
-	}
-}
-
-void InverseKinematics::_notification(int p_what)
-{
-
-	switch(p_what) {
-
-		case NOTIFICATION_ENTER_TREE: {
-
-			_check_bind();
-			if (bound) {
-				update_parameters();
-				changed = false;
-				set_process(true);
-			}
-		} break;
-		case NOTIFICATION_PROCESS: {
-
-			Spatial *sksp = skel->cast_to<Spatial>();
-			if (!bound)
-				break;
-			if (!sksp)
-				break;
-			if (changed) {
-				update_parameters();
-				changed = false;
-			}
-			Vector3 to = get_translation();
-			for (int hump = 0; hump < iterations; hump++) {
-				int depth = 0;
-				float olderr = 1000.0;
-				float psign = 1.0;
-				bool reached = false;
-
-				for (List<int>::Element *b = chain.front(); b; b = b->next()) {
-					int cur_bone = b->get();
-					Vector3 d = skel->get_bone_global_pose(tail_bone).origin;
-					Vector3 rg = to;
-					float err = d.distance_squared_to(rg);
-					if (err < precision) {
-						if (!reached && err < precision)
-							reached = true;
-						break;
-					} else
-						if (reached)
-							reached = false;
-					if (err > olderr)
-						psign = -psign;
-					Transform mod = skel->get_bone_global_pose(cur_bone);
-					Quat q1 = Quat(mod.basis).normalized();
-					Transform mod2 = mod.looking_at(to, Vector3(0.0, 1.0, 0.0));
-					Quat q2 = Quat(mod2.basis).normalized();
-					if (psign < 0.0)
-						q2 = q2.inverse();
-					Quat q = q1.slerp(q2, speed / (1.0 + 500.0 * depth)).normalized();
-					Transform fin = Transform(q);
-					fin.origin = mod.origin;
-					skel->set_bone_global_pose(cur_bone, fin);
-					depth++;
-				}
-				if (reached)
-					break;
-
-			}
-
-	   	} break;
-		case NOTIFICATION_EXIT_TREE: {
-			set_process(false);
-
-			_check_unbind();
-		} break;
-	}
-}
-void InverseKinematics::_bind_methods() {
-	ObjectTypeDB::bind_method(_MD("set_bone_name","ik_bone"),&InverseKinematics::set_bone_name);
-	ObjectTypeDB::bind_method(_MD("get_bone_name"),&InverseKinematics::get_bone_name);
-	ObjectTypeDB::bind_method(_MD("set_iterations","iterations"),&InverseKinematics::set_iterations);
-	ObjectTypeDB::bind_method(_MD("get_iterations"),&InverseKinematics::get_iterations);
-	ObjectTypeDB::bind_method(_MD("set_chain_size","chain_size"),&InverseKinematics::set_chain_size);
-	ObjectTypeDB::bind_method(_MD("get_chain_size"),&InverseKinematics::get_chain_size);
-	ObjectTypeDB::bind_method(_MD("set_precision","precision"),&InverseKinematics::set_precision);
-	ObjectTypeDB::bind_method(_MD("get_precision"),&InverseKinematics::get_precision);
-	ObjectTypeDB::bind_method(_MD("set_speed","speed"),&InverseKinematics::set_speed);
-	ObjectTypeDB::bind_method(_MD("get_speed"),&InverseKinematics::get_speed);
-	ADD_PROPERTY(PropertyInfo(Variant::INT, "iterations"), _SCS("set_iterations"), _SCS("get_iterations"));
-	ADD_PROPERTY(PropertyInfo(Variant::INT, "chain_size"), _SCS("set_chain_size"), _SCS("get_chain_size"));
-	ADD_PROPERTY(PropertyInfo(Variant::REAL, "precision"), _SCS("set_precision"), _SCS("get_precision"));
-	ADD_PROPERTY(PropertyInfo(Variant::REAL, "speed"), _SCS("set_speed"), _SCS("get_speed"));
-}
-
-InverseKinematics::InverseKinematics()
-{
-	bound=false;
-	chain_size = 2;
-	iterations = 100;
-	precision = 0.001;
-	speed = 0.2;
-
-}
-