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/*!
@file
@author Albert Semenov
@date 08/2008
*/
#include "WobbleNodeAnimator.h"
namespace demo
{
float squaredDistance(const MyGUI::FloatPoint& _value, const MyGUI::FloatPoint& _other)
{
float x1 = _other.left - _value.left;
float y1 = _other.top - _value.top;
return x1 * x1 + y1 * y1;
}
float getLength(const MyGUI::FloatPoint& _value)
{
return (float)sqrt( _value.left * _value.left + _value.top * _value.top );
}
void setLength(MyGUI::FloatPoint& _value, float _len)
{
float temp = getLength(_value);
_value.left *= _len / temp;
_value.top *= _len / temp;
}
float squaredLength(const MyGUI::FloatPoint& _value)
{
return _value.left * _value.left + _value.top * _value.top;
}
WobbleNodeAnimator::WobbleNodeAnimator() :
mInertiaMode(false),
mDragStrength(0.001f),
mResizeStrength(0.0009f),
mDestroy(true)
{
}
void WobbleNodeAnimator::deserialization(MyGUI::xml::ElementPtr _node, MyGUI::Version _version)
{
MyGUI::xml::ElementEnumerator node = _node->getElementEnumerator();
while (node.next("Property"))
{
const std::string& key = node->findAttribute("key");
const std::string& value = node->findAttribute("value");
if (key == "DragStrength") mDragStrength = MyGUI::utility::parseFloat(value);
else if (key == "ResizeStrength") mResizeStrength = MyGUI::utility::parseFloat(value);
}
}
size_t WobbleNodeAnimator::animate(
bool _update,
size_t _quad_count,
MyGUI::VectorQuadData& _data,
float _time,
MyGUI::IVertexBuffer* _buffer,
MyGUI::ITexture* _texture,
const MyGUI::RenderTargetInfo& _info,
const MyGUI::IntCoord& _coord,
bool& _isAnimate
)
{
if (mDestroy)
{
return _quad_count;
}
//
if (mOldCoord.empty())
{
mOldCoord = _coord;
}
else if (mOldCoord.size() != _coord.size() && mOldCoord.point() != _coord.point())
{
mInertiaPoint.set(0.5, 0.5);
mInertiaMode = false;
addInertia(MyGUI::FloatPoint((float)_coord.left - mOldCoord.left, (float)_coord.top - mOldCoord.top));
}
else if (mOldCoord.size() != _coord.size())
{
mInertiaMode = true;
addInertia(MyGUI::FloatPoint((float)_coord.width - mOldCoord.width, (float)_coord.height - mOldCoord.height));
}
else if (mOldCoord.point() != _coord.point())
{
const MyGUI::IntPoint& point = MyGUI::InputManager::getInstance().getMousePosition();
mInertiaPoint = MyGUI::FloatPoint((float)(point.left - _coord.left) / (float)_coord.width, (float)(point.top - _coord.top) / (float)_coord.height);
mInertiaMode = false;
addInertia(MyGUI::FloatPoint((float)_coord.left - mOldCoord.left, (float)_coord.top - mOldCoord.top));
}
mOldCoord = _coord;
addTime(_time);
bool anim_update = squaredLength(mDragOffset) >= 0.3f;
if (!anim_update)
{
return _quad_count;
}
_isAnimate = true;
_quad_count = tesselation(
_quad_count,
_data,
_texture,
_info,
_coord);
buildQuadVertex(_data);
return _quad_count;
}
void WobbleNodeAnimator::addInertia(const MyGUI::FloatPoint& _value)
{
const float clampFactor = 50.0f;
mInertia = mInertia + _value;
if ( getLength(mInertia) > clampFactor )
setLength(mInertia, clampFactor);
}
void WobbleNodeAnimator::addTime(float _time)
{
const float speed = 4;
_time = std::min(0.05f, _time);
MyGUI::FloatPoint previousdrag = mDragOffset;
mDragOffset.left = mDragOffset.left + mInertia.left * 5.0f * speed * _time;
mDragOffset.top = mDragOffset.top + mInertia.top * 5.0f * speed * _time;
mInertia.left += (mInertia.left * -5 * speed * _time);
mInertia.left += (previousdrag.left * -4.0f * speed * _time);
mInertia.top += (mInertia.top * -5 * speed * _time);
mInertia.top += (previousdrag.top * -4.0f * speed * _time);
}
void WobbleNodeAnimator::buildQuadVertex(MyGUI::VectorQuadData& _data)
{
int count_w = getCountX();
int count_h = getCountY();
for (int rx = 0; rx < count_w + 1; rx++)
{
for (int ry = 0; ry < count_h + 1; ry++)
{
MyGUI::FloatPoint point((float)rx / (float)count_w, (float)ry / (float)count_h);
float drageffect = 0;
if (mInertiaMode)
{
float drageffect1 = squaredDistance(point, MyGUI::FloatPoint(0, 0)) * mResizeStrength;
float drageffect2 = squaredDistance(point, MyGUI::FloatPoint(1, 1)) * mResizeStrength;
drageffect = std::min(drageffect1, drageffect2);
}
else
{
drageffect = squaredDistance(mInertiaPoint, point) * mDragStrength;
}
float fx = getLeft() + getWidth() * point.left;
float fy = getTop() + getHeight() * point.top;
MyGUI::FloatPoint vert(fx + (-mDragOffset.left) * drageffect, fy + mDragOffset.top * drageffect);
if (rx < count_w && ry < count_h)
{
_data[rx + ry* count_w].vertex[MyGUI::QuadData::CornerLT].x = vert.left;
_data[rx + ry* count_w].vertex[MyGUI::QuadData::CornerLT].y = vert.top;
}
if (rx > 0 && ry > 0)
{
_data[(rx-1) + (ry-1)*count_w].vertex[MyGUI::QuadData::CornerRB].x = vert.left;
_data[(rx-1) + (ry-1)*count_w].vertex[MyGUI::QuadData::CornerRB].y = vert.top;
}
if (rx > 0 && ry < count_h)
{
_data[(rx-1) + ry* count_w].vertex[MyGUI::QuadData::CornerRT].x = vert.left;
_data[(rx-1) + ry* count_w].vertex[MyGUI::QuadData::CornerRT].y = vert.top;
}
if (rx < count_w && ry > 0)
{
_data[rx + (ry-1)*count_w].vertex[MyGUI::QuadData::CornerLB].x = vert.left;
_data[rx + (ry-1)*count_w].vertex[MyGUI::QuadData::CornerLB].y = vert.top;
}
}
}
}
void WobbleNodeAnimator::create()
{
mDestroy = false;
}
void WobbleNodeAnimator::destroy()
{
mDestroy = true;
}
void WobbleNodeAnimator::attach(MyGUI::ILayerNode* _node)
{
_node->castType<MyGUI::RTTLayerNode>()->addLayerNodeAnimation(this);
}
}
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