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axmol/cocos/2d/CCMotionStreak.cpp

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/****************************************************************************
Copyright (c) 2011 ForzeField Studios S.L.
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2013-2014 Chukong Technologies Inc.
http://www.cocos2d-x.org
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 false 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 "2d/CCMotionStreak.h"
#include "2d/CCTextureCache.h"
#include "2d/CCVertex.h"
#include "renderer/ccGLStateCache.h"
#include "renderer/CCGLProgram.h"
#include "renderer/CCGLProgramState.h"
#include "renderer/CCCustomCommand.h"
#include "renderer/CCRenderer.h"
#include "base/ccMacros.h"
#include "base/CCDirector.h"
NS_CC_BEGIN
MotionStreak::MotionStreak()
: _fastMode(false)
, _startingPositionInitialized(false)
, _texture(nullptr)
, _blendFunc(BlendFunc::ALPHA_NON_PREMULTIPLIED)
, _positionR(Vector2::ZERO)
, _stroke(0.0f)
, _fadeDelta(0.0f)
, _minSeg(0.0f)
, _maxPoints(0)
, _nuPoints(0)
, _previousNuPoints(0)
, _pointVertexes(nullptr)
, _pointState(nullptr)
, _vertices(nullptr)
, _colorPointer(nullptr)
, _texCoords(nullptr)
{
}
MotionStreak::~MotionStreak()
{
CC_SAFE_RELEASE(_texture);
CC_SAFE_FREE(_pointState);
CC_SAFE_FREE(_pointVertexes);
CC_SAFE_FREE(_vertices);
CC_SAFE_FREE(_colorPointer);
CC_SAFE_FREE(_texCoords);
}
MotionStreak* MotionStreak::create(float fade, float minSeg, float stroke, const Color3B& color, const std::string& path)
{
MotionStreak *ret = new MotionStreak();
if (ret && ret->initWithFade(fade, minSeg, stroke, color, path))
{
ret->autorelease();
return ret;
}
CC_SAFE_DELETE(ret);
return nullptr;
}
MotionStreak* MotionStreak::create(float fade, float minSeg, float stroke, const Color3B& color, Texture2D* texture)
{
MotionStreak *ret = new MotionStreak();
if (ret && ret->initWithFade(fade, minSeg, stroke, color, texture))
{
ret->autorelease();
return ret;
}
CC_SAFE_DELETE(ret);
return nullptr;
}
bool MotionStreak::initWithFade(float fade, float minSeg, float stroke, const Color3B& color, const std::string& path)
{
CCASSERT(!path.empty(), "Invalid filename");
Texture2D *texture = Director::getInstance()->getTextureCache()->addImage(path);
return initWithFade(fade, minSeg, stroke, color, texture);
}
bool MotionStreak::initWithFade(float fade, float minSeg, float stroke, const Color3B& color, Texture2D* texture)
{
Node::setPosition(Vector2::ZERO);
setAnchorPoint(Vector2::ZERO);
ignoreAnchorPointForPosition(true);
_startingPositionInitialized = false;
_positionR = Vector2::ZERO;
_fastMode = true;
_minSeg = (minSeg == -1.0f) ? stroke/5.0f : minSeg;
_minSeg *= _minSeg;
_stroke = stroke;
_fadeDelta = 1.0f/fade;
_maxPoints = (int)(fade*60.0f)+2;
_nuPoints = 0;
_pointState = (float *)malloc(sizeof(float) * _maxPoints);
_pointVertexes = (Vector2*)malloc(sizeof(Vector2) * _maxPoints);
_vertices = (Vector2*)malloc(sizeof(Vector2) * _maxPoints * 2);
_texCoords = (Tex2F*)malloc(sizeof(Tex2F) * _maxPoints * 2);
_colorPointer = (GLubyte*)malloc(sizeof(GLubyte) * _maxPoints * 2 * 4);
// Set blend mode
_blendFunc = BlendFunc::ALPHA_NON_PREMULTIPLIED;
// shader state
setGLProgramState(GLProgramState::getWithGLProgramName(GLProgram::SHADER_NAME_POSITION_TEXTURE_COLOR));
setTexture(texture);
setColor(color);
scheduleUpdate();
return true;
}
void MotionStreak::setPosition(const Vector2& position)
{
if (!_startingPositionInitialized) {
_startingPositionInitialized = true;
}
_positionR = position;
}
void MotionStreak::setPosition(float x, float y)
{
if (!_startingPositionInitialized) {
_startingPositionInitialized = true;
}
_positionR.x = x;
_positionR.y = y;
}
const Vector2& MotionStreak::getPosition() const
{
return _positionR;
}
void MotionStreak::getPosition(float* x, float* y) const
{
*x = _positionR.x;
*y = _positionR.y;
}
float MotionStreak::getPositionX() const
{
return _positionR.x;
}
void MotionStreak::setPositionX(float x)
{
if (!_startingPositionInitialized) {
_startingPositionInitialized = true;
}
_positionR.x = x;
}
float MotionStreak::getPositionY() const
{
return _positionR.y;
}
void MotionStreak::setPositionY(float y)
{
if (!_startingPositionInitialized) {
_startingPositionInitialized = true;
}
_positionR.y = y;
}
void MotionStreak::tintWithColor(const Color3B& colors)
{
setColor(colors);
// Fast assignation
for(unsigned int i = 0; i<_nuPoints*2; i++)
{
*((Color3B*) (_colorPointer+i*4)) = colors;
}
}
Texture2D* MotionStreak::getTexture(void) const
{
return _texture;
}
void MotionStreak::setTexture(Texture2D *texture)
{
if (_texture != texture)
{
CC_SAFE_RETAIN(texture);
CC_SAFE_RELEASE(_texture);
_texture = texture;
}
}
void MotionStreak::setBlendFunc(const BlendFunc &blendFunc)
{
_blendFunc = blendFunc;
}
const BlendFunc& MotionStreak::getBlendFunc(void) const
{
return _blendFunc;
}
void MotionStreak::setOpacity(GLubyte opacity)
{
CCASSERT(false, "Set opacity no supported");
}
GLubyte MotionStreak::getOpacity(void) const
{
CCASSERT(false, "Opacity no supported");
return 0;
}
void MotionStreak::setOpacityModifyRGB(bool bValue)
{
CC_UNUSED_PARAM(bValue);
}
bool MotionStreak::isOpacityModifyRGB(void) const
{
return false;
}
void MotionStreak::update(float delta)
{
if (!_startingPositionInitialized)
{
return;
}
delta *= _fadeDelta;
unsigned int newIdx, newIdx2, i, i2;
unsigned int mov = 0;
// Update current points
for(i = 0; i<_nuPoints; i++)
{
_pointState[i]-=delta;
if(_pointState[i] <= 0)
mov++;
else
{
newIdx = i-mov;
if(mov>0)
{
// Move data
_pointState[newIdx] = _pointState[i];
// Move point
_pointVertexes[newIdx] = _pointVertexes[i];
// Move vertices
i2 = i*2;
newIdx2 = newIdx*2;
_vertices[newIdx2] = _vertices[i2];
_vertices[newIdx2+1] = _vertices[i2+1];
// Move color
i2 *= 4;
newIdx2 *= 4;
_colorPointer[newIdx2+0] = _colorPointer[i2+0];
_colorPointer[newIdx2+1] = _colorPointer[i2+1];
_colorPointer[newIdx2+2] = _colorPointer[i2+2];
_colorPointer[newIdx2+4] = _colorPointer[i2+4];
_colorPointer[newIdx2+5] = _colorPointer[i2+5];
_colorPointer[newIdx2+6] = _colorPointer[i2+6];
}else
newIdx2 = newIdx*8;
const GLubyte op = (GLubyte)(_pointState[newIdx] * 255.0f);
_colorPointer[newIdx2+3] = op;
_colorPointer[newIdx2+7] = op;
}
}
_nuPoints-=mov;
// Append new point
bool appendNewPoint = true;
if(_nuPoints >= _maxPoints)
{
appendNewPoint = false;
}
else if(_nuPoints>0)
{
bool a1 = _pointVertexes[_nuPoints-1].getDistanceSq(_positionR) < _minSeg;
bool a2 = (_nuPoints == 1) ? false : (_pointVertexes[_nuPoints-2].getDistanceSq(_positionR)< (_minSeg * 2.0f));
if(a1 || a2)
{
appendNewPoint = false;
}
}
if(appendNewPoint)
{
_pointVertexes[_nuPoints] = _positionR;
_pointState[_nuPoints] = 1.0f;
// Color assignment
const unsigned int offset = _nuPoints*8;
*((Color3B*)(_colorPointer + offset)) = _displayedColor;
*((Color3B*)(_colorPointer + offset+4)) = _displayedColor;
// Opacity
_colorPointer[offset+3] = 255;
_colorPointer[offset+7] = 255;
// Generate polygon
if(_nuPoints > 0 && _fastMode )
{
if(_nuPoints > 1)
{
ccVertexLineToPolygon(_pointVertexes, _stroke, _vertices, _nuPoints, 1);
}
else
{
ccVertexLineToPolygon(_pointVertexes, _stroke, _vertices, 0, 2);
}
}
_nuPoints ++;
}
if( ! _fastMode )
{
ccVertexLineToPolygon(_pointVertexes, _stroke, _vertices, 0, _nuPoints);
}
// Updated Tex Coords only if they are different than previous step
if( _nuPoints && _previousNuPoints != _nuPoints ) {
float texDelta = 1.0f / _nuPoints;
for( i=0; i < _nuPoints; i++ ) {
_texCoords[i*2] = Tex2F(0, texDelta*i);
_texCoords[i*2+1] = Tex2F(1, texDelta*i);
}
_previousNuPoints = _nuPoints;
}
}
void MotionStreak::reset()
{
_nuPoints = 0;
}
void MotionStreak::onDraw(const Matrix &transform, bool transformUpdated)
{
getGLProgram()->use();
getGLProgram()->setUniformsForBuiltins(transform);
GL::enableVertexAttribs(GL::VERTEX_ATTRIB_FLAG_POS_COLOR_TEX );
GL::blendFunc( _blendFunc.src, _blendFunc.dst );
GL::bindTexture2D( _texture->getName() );
#ifdef EMSCRIPTEN
// Size calculations from ::initWithFade
setGLBufferData(_vertices, (sizeof(Vector2) * _maxPoints * 2), 0);
glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_POSITION, 2, GL_FLOAT, GL_FALSE, 0, 0);
setGLBufferData(_texCoords, (sizeof(Tex2F) * _maxPoints * 2), 1);
glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_TEX_COORD, 2, GL_FLOAT, GL_FALSE, 0, 0);
setGLBufferData(_colorPointer, (sizeof(GLubyte) * _maxPoints * 2 * 4), 2);
glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_COLOR, 4, GL_UNSIGNED_BYTE, GL_TRUE, 0, 0);
#else
glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_POSITION, 2, GL_FLOAT, GL_FALSE, 0, _vertices);
glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_TEX_COORD, 2, GL_FLOAT, GL_FALSE, 0, _texCoords);
glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_COLOR, 4, GL_UNSIGNED_BYTE, GL_TRUE, 0, _colorPointer);
#endif // EMSCRIPTEN
glDrawArrays(GL_TRIANGLE_STRIP, 0, (GLsizei)_nuPoints*2);
CC_INCREMENT_GL_DRAWN_BATCHES_AND_VERTICES(1, _nuPoints*2);
}
void MotionStreak::draw(Renderer *renderer, const Matrix &transform, bool transformUpdated)
{
if(_nuPoints <= 1)
return;
_customCommand.init(_globalZOrder);
_customCommand.func = CC_CALLBACK_0(MotionStreak::onDraw, this, transform, transformUpdated);
renderer->addCommand(&_customCommand);
}
NS_CC_END
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