cocos-enhance-kit/cocos2d-x/cocos/editor-support/spine/Bone.cpp

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 * Last updated January 1, 2020. Replaces all prior versions.
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 * Copyright (c) 2013-2020, Esoteric Software LLC
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#ifdef SPINE_UE4
#include "SpinePluginPrivatePCH.h"
#endif

#include <spine/Bone.h>

#include <spine/BoneData.h>
#include <spine/Skeleton.h>

using namespace spine;

RTTI_IMPL(Bone, Updatable)

bool Bone::yDown = false;

void Bone::setYDown(bool inValue) {
	yDown = inValue;
}

bool Bone::isYDown() {
	return yDown;
}

Bone::Bone(BoneData &data, Skeleton &skeleton, Bone *parent) : Updatable(),
	_data(data),
	_skeleton(skeleton),
	_parent(parent),
	_x(0),
	_y(0),
	_rotation(0),
	_scaleX(0),
	_scaleY(0),
	_shearX(0),
	_shearY(0),
	_ax(0),
	_ay(0),
	_arotation(0),
	_ascaleX(0),
	_ascaleY(0),
	_ashearX(0),
	_ashearY(0),
	_appliedValid(false),
	_a(1),
	_b(0),
	_worldX(0),
	_c(0),
	_d(1),
	_worldY(0),
	_sorted(false),
	_active(false)
{
	setToSetupPose();
}

void Bone::update() {
	updateWorldTransform(_x, _y, _rotation, _scaleX, _scaleY, _shearX, _shearY);
}

void Bone::updateWorldTransform() {
	updateWorldTransform(_x, _y, _rotation, _scaleX, _scaleY, _shearX, _shearY);
}

void Bone::updateWorldTransform(float x, float y, float rotation, float scaleX, float scaleY, float shearX, float shearY) {
	float cosine, sine;
	float pa, pb, pc, pd;
	Bone *parent = _parent;

	_ax = x;
	_ay = y;
	_arotation = rotation;
	_ascaleX = scaleX;
	_ascaleY = scaleY;
	_ashearX = shearX;
	_ashearY = shearY;
	_appliedValid = true;

	if (!parent) { /* Root bone. */
		float rotationY = rotation + 90 + shearY;
		float sx = _skeleton.getScaleX();
		float sy = _skeleton.getScaleY();
		_a = MathUtil::cosDeg(rotation + shearX) * scaleX * sx;
		_b = MathUtil::cosDeg(rotationY) * scaleY * sx;
		_c = MathUtil::sinDeg(rotation + shearX) * scaleX * sy;
		_d = MathUtil::sinDeg(rotationY) * scaleY * sy;
		_worldX = x * sx + _skeleton.getX();
		_worldY = y * sy + _skeleton.getY();
		return;
	}

	pa = parent->_a;
	pb = parent->_b;
	pc = parent->_c;
	pd = parent->_d;

	_worldX = pa * x + pb * y + parent->_worldX;
	_worldY = pc * x + pd * y + parent->_worldY;

	switch (_data.getTransformMode()) {
	case TransformMode_Normal: {
		float rotationY = rotation + 90 + shearY;
		float la = MathUtil::cosDeg(rotation + shearX) * scaleX;
		float lb = MathUtil::cosDeg(rotationY) * scaleY;
		float lc = MathUtil::sinDeg(rotation + shearX) * scaleX;
		float ld = MathUtil::sinDeg(rotationY) * scaleY;
		_a = pa * la + pb * lc;
		_b = pa * lb + pb * ld;
		_c = pc * la + pd * lc;
		_d = pc * lb + pd * ld;
		return;
	}
	case TransformMode_OnlyTranslation: {
		float rotationY = rotation + 90 + shearY;
		_a = MathUtil::cosDeg(rotation + shearX) * scaleX;
		_b = MathUtil::cosDeg(rotationY) * scaleY;
		_c = MathUtil::sinDeg(rotation + shearX) * scaleX;
		_d = MathUtil::sinDeg(rotationY) * scaleY;
		break;
	}
	case TransformMode_NoRotationOrReflection: {
		float s = pa * pa + pc * pc;
		float prx, rx, ry, la, lb, lc, ld;
		if (s > 0.0001f) {
			s = MathUtil::abs(pa * pd - pb * pc) / s;
			pb = pc * s;
			pd = pa * s;
			prx = MathUtil::atan2(pc, pa) * MathUtil::Rad_Deg;
		} else {
			pa = 0;
			pc = 0;
			prx = 90 - MathUtil::atan2(pd, pb) * MathUtil::Rad_Deg;
		}
		rx = rotation + shearX - prx;
		ry = rotation + shearY - prx + 90;
		la = MathUtil::cosDeg(rx) * scaleX;
		lb = MathUtil::cosDeg(ry) * scaleY;
		lc = MathUtil::sinDeg(rx) * scaleX;
		ld = MathUtil::sinDeg(ry) * scaleY;
		_a = pa * la - pb * lc;
		_b = pa * lb - pb * ld;
		_c = pc * la + pd * lc;
		_d = pc * lb + pd * ld;
		break;
	}
	case TransformMode_NoScale:
	case TransformMode_NoScaleOrReflection: {
		float za, zc, s;
		float r, zb, zd, la, lb, lc, ld;
		cosine = MathUtil::cosDeg(rotation);
		sine = MathUtil::sinDeg(rotation);
		za = (pa * cosine + pb * sine) / _skeleton.getScaleX();
		zc = (pc * cosine + pd * sine) / _skeleton.getScaleY();
		s = MathUtil::sqrt(za * za + zc * zc);
		if (s > 0.00001f) s = 1 / s;
		za *= s;
		zc *= s;
		s = MathUtil::sqrt(za * za + zc * zc);
		if (_data.getTransformMode() == TransformMode_NoScale
			&& (pa * pd - pb * pc < 0) != (_skeleton.getScaleX() < 0 != _skeleton.getScaleY() < 0))
			s = -s;
		r = MathUtil::Pi / 2 + MathUtil::atan2(zc, za);
		zb = MathUtil::cos(r) * s;
		zd = MathUtil::sin(r) * s;
		la = MathUtil::cosDeg(shearX) * scaleX;
		lb = MathUtil::cosDeg(90 + shearY) * scaleY;
		lc = MathUtil::sinDeg(shearX) * scaleX;
		ld = MathUtil::sinDeg(90 + shearY) * scaleY;
		_a = za * la + zb * lc;
		_b = za * lb + zb * ld;
		_c = zc * la + zd * lc;
		_d = zc * lb + zd * ld;
		break;
	}
	}
	_a *= _skeleton.getScaleX();
	_b *= _skeleton.getScaleX();
	_c *= _skeleton.getScaleY();
	_d *= _skeleton.getScaleY();
}

void Bone::setToSetupPose() {
	BoneData &data = _data;
	_x = data.getX();
	_y = data.getY();
	_rotation = data.getRotation();
	_scaleX = data.getScaleX();
	_scaleY = data.getScaleY();
	_shearX = data.getShearX();
	_shearY = data.getShearY();
}

void Bone::worldToLocal(float worldX, float worldY, float &outLocalX, float &outLocalY) {
	float a = _a;
	float b = _b;
	float c = _c;
	float d = _d;

	float invDet = 1 / (a * d - b * c);
	float x = worldX - _worldX;
	float y = worldY - _worldY;

	outLocalX = (x * d * invDet - y * b * invDet);
	outLocalY = (y * a * invDet - x * c * invDet);
}

void Bone::localToWorld(float localX, float localY, float &outWorldX, float &outWorldY) {
	outWorldX = localX * _a + localY * _b + _worldX;
	outWorldY = localX * _c + localY * _d + _worldY;
}

float Bone::worldToLocalRotation(float worldRotation) {
	float sin = MathUtil::sinDeg(worldRotation);
	float cos = MathUtil::cosDeg(worldRotation);

	return MathUtil::atan2(_a * sin - _c * cos, _d * cos - _b * sin) * MathUtil::Rad_Deg + this->_rotation - this->_shearX;
}

float Bone::localToWorldRotation(float localRotation) {
	localRotation -= this->_rotation - this->_shearX;
	float sin = MathUtil::sinDeg(localRotation);
	float cos = MathUtil::cosDeg(localRotation);

	return MathUtil::atan2(cos * _c + sin * _d, cos * _a + sin * _b) * MathUtil::Rad_Deg;
}

void Bone::rotateWorld(float degrees) {
	float a = _a;
	float b = _b;
	float c = _c;
	float d = _d;

	float cos = MathUtil::cosDeg(degrees);
	float sin = MathUtil::sinDeg(degrees);

	_a = cos * a - sin * c;
	_b = cos * b - sin * d;
	_c = sin * a + cos * c;
	_d = sin * b + cos * d;

	_appliedValid = false;
}

float Bone::getWorldToLocalRotationX() {
	Bone *parent = _parent;
	if (!parent) {
		return _arotation;
	}

	float pa = parent->_a;
	float pb = parent->_b;
	float pc = parent->_c;
	float pd = parent->_d;
	float a = _a;
	float c = _c;

	return MathUtil::atan2(pa * c - pc * a, pd * a - pb * c) * MathUtil::Rad_Deg;
}

float Bone::getWorldToLocalRotationY() {
	Bone *parent = _parent;
	if (!parent) {
		return _arotation;
	}

	float pa = parent->_a;
	float pb = parent->_b;
	float pc = parent->_c;
	float pd = parent->_d;
	float b = _b;
	float d = _d;

	return MathUtil::atan2(pa * d - pc * b, pd * b - pb * d) * MathUtil::Rad_Deg;
}

BoneData &Bone::getData() {
	return _data;
}

Skeleton &Bone::getSkeleton() {
	return _skeleton;
}

Bone *Bone::getParent() {
	return _parent;
}

Vector<Bone *> &Bone::getChildren() {
	return _children;
}

float Bone::getX() {
	return _x;
}

void Bone::setX(float inValue) {
	_x = inValue;
}

float Bone::getY() {
	return _y;
}

void Bone::setY(float inValue) {
	_y = inValue;
}

float Bone::getRotation() {
	return _rotation;
}

void Bone::setRotation(float inValue) {
	_rotation = inValue;
}

float Bone::getScaleX() {
	return _scaleX;
}

void Bone::setScaleX(float inValue) {
	_scaleX = inValue;
}

float Bone::getScaleY() {
	return _scaleY;
}

void Bone::setScaleY(float inValue) {
	_scaleY = inValue;
}

float Bone::getShearX() {
	return _shearX;
}

void Bone::setShearX(float inValue) {
	_shearX = inValue;
}

float Bone::getShearY() {
	return _shearY;
}

void Bone::setShearY(float inValue) {
	_shearY = inValue;
}

float Bone::getAppliedRotation() {
	return _arotation;
}

void Bone::setAppliedRotation(float inValue) {
	_arotation = inValue;
}

float Bone::getAX() {
	return _ax;
}

void Bone::setAX(float inValue) {
	_ax = inValue;
}

float Bone::getAY() {
	return _ay;
}

void Bone::setAY(float inValue) {
	_ay = inValue;
}

float Bone::getAScaleX() {
	return _ascaleX;
}

void Bone::setAScaleX(float inValue) {
	_ascaleX = inValue;
}

float Bone::getAScaleY() {
	return _ascaleY;
}

void Bone::setAScaleY(float inValue) {
	_ascaleY = inValue;
}

float Bone::getAShearX() {
	return _ashearX;
}

void Bone::setAShearX(float inValue) {
	_ashearX = inValue;
}

float Bone::getAShearY() {
	return _ashearY;
}

void Bone::setAShearY(float inValue) {
	_ashearY = inValue;
}

float Bone::getA() {
	return _a;
}

void Bone::setA(float inValue) {
	_a = inValue;
}

float Bone::getB() {
	return _b;
}

void Bone::setB(float inValue) {
	_b = inValue;
}

float Bone::getC() {
	return _c;
}

void Bone::setC(float inValue) {
	_c = inValue;
}

float Bone::getD() {
	return _d;
}

void Bone::setD(float inValue) {
	_d = inValue;
}

float Bone::getWorldX() {
	return _worldX;
}

void Bone::setWorldX(float inValue) {
	_worldX = inValue;
}

float Bone::getWorldY() {
	return _worldY;
}

void Bone::setWorldY(float inValue) {
	_worldY = inValue;
}

float Bone::getWorldRotationX() {
	return MathUtil::atan2(_c, _a) * MathUtil::MathUtil::Rad_Deg;
}

float Bone::getWorldRotationY() {
	return MathUtil::atan2(_d, _b) * MathUtil::Rad_Deg;
}

float Bone::getWorldScaleX() {
	return MathUtil::sqrt(_a * _a + _c * _c);
}

float Bone::getWorldScaleY() {
	return MathUtil::sqrt(_b * _b + _d * _d);
}

bool Bone::isAppliedValid() {
	return _appliedValid;
}
void Bone::setAppliedValid(bool valid) {
	_appliedValid = valid;
}

void Bone::updateAppliedTransform() {
	Bone *parent = _parent;
	_appliedValid = 1;
	if (!parent) {
		_ax = _worldX;
		_ay = _worldY;
		_arotation = MathUtil::atan2(_c, _a) * MathUtil::Rad_Deg;
		_ascaleX = MathUtil::sqrt(_a * _a + _c * _c);
		_ascaleY = MathUtil::sqrt(_b * _b + _d * _d);
		_ashearX = 0;
		_ashearY = MathUtil::atan2(_a * _b + _c * _d, _a * _d - _b * _c) * MathUtil::Rad_Deg;
	} else {
		float pa = parent->_a, pb = parent->_b, pc = parent->_c, pd = parent->_d;
		float pid = 1 / (pa * pd - pb * pc);
		float dx = _worldX - parent->_worldX, dy = _worldY - parent->_worldY;
		float ia = pid * pd;
		float id = pid * pa;
		float ib = pid * pb;
		float ic = pid * pc;
		float ra = ia * _a - ib * _c;
		float rb = ia * _b - ib * _d;
		float rc = id * _c - ic * _a;
		float rd = id * _d - ic * _b;
		_ax = (dx * pd * pid - dy * pb * pid);
		_ay = (dy * pa * pid - dx * pc * pid);
		_ashearX = 0;
		_ascaleX = MathUtil::sqrt(ra * ra + rc * rc);
		if (_ascaleX > 0.0001f) {
			float det = ra * rd - rb * rc;
			_ascaleY = det / _ascaleX;
			_ashearY = MathUtil::atan2(ra * rb + rc * rd, det) * MathUtil::Rad_Deg;
			_arotation = MathUtil::atan2(rc, ra) * MathUtil::Rad_Deg;
		} else {
			_ascaleX = 0;
			_ascaleY = MathUtil::sqrt(rb * rb + rd * rd);
			_ashearY = 0;
			_arotation = 90 - MathUtil::atan2(rd, rb) * MathUtil::Rad_Deg;
		}
	}
}

bool Bone::isActive() {
	return _active;
}

void Bone::setActive(bool inValue) {
	_active = inValue;
}