/cocos/2d/CCMotionStreak.cpp
C++ | 359 lines | 260 code | 61 blank | 38 comment | 29 complexity | b57e40c2d927fcf32bdc5661b6aa02d6 MD5 | raw file
- /****************************************************************************
- Copyright (c) 2010-2012 cocos2d-x.org
- Copyright (c) 2011 ForzeField Studios S.L.
- 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 "CCMotionStreak.h"
- #include "CCTextureCache.h"
- #include "ccGLStateCache.h"
- #include "CCGLProgram.h"
- #include "CCShaderCache.h"
- #include "ccMacros.h"
- #include "CCDirector.h"
- #include "CCVertex.h"
- NS_CC_BEGIN
- MotionStreak::MotionStreak()
- : _fastMode(false)
- , _startingPositionInitialized(false)
- , _texture(NULL)
- , _blendFunc(BlendFunc::ALPHA_NON_PREMULTIPLIED)
- , _positionR(Point::ZERO)
- , _stroke(0.0f)
- , _fadeDelta(0.0f)
- , _minSeg(0.0f)
- , _maxPoints(0)
- , _nuPoints(0)
- , _previousNuPoints(0)
- , _pointVertexes(NULL)
- , _pointState(NULL)
- , _vertices(NULL)
- , _colorPointer(NULL)
- , _texCoords(NULL)
- {
- }
- 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 char* path)
- {
- MotionStreak *pRet = new MotionStreak();
- if (pRet && pRet->initWithFade(fade, minSeg, stroke, color, path))
- {
- pRet->autorelease();
- return pRet;
- }
- CC_SAFE_DELETE(pRet);
- return NULL;
- }
- MotionStreak* MotionStreak::create(float fade, float minSeg, float stroke, const Color3B& color, Texture2D* texture)
- {
- MotionStreak *pRet = new MotionStreak();
- if (pRet && pRet->initWithFade(fade, minSeg, stroke, color, texture))
- {
- pRet->autorelease();
- return pRet;
- }
- CC_SAFE_DELETE(pRet);
- return NULL;
- }
- bool MotionStreak::initWithFade(float fade, float minSeg, float stroke, const Color3B& color, const char* path)
- {
- CCASSERT(path != NULL, "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(Point::ZERO);
- setAnchorPoint(Point::ZERO);
- ignoreAnchorPointForPosition(true);
- _startingPositionInitialized = false;
- _positionR = Point::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 = (Point*)malloc(sizeof(Point) * _maxPoints);
- _vertices = (Vertex2F*)malloc(sizeof(Vertex2F) * _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 program
- setShaderProgram(ShaderCache::getInstance()->getProgram(GLProgram::SHADER_NAME_POSITION_TEXTURE_COLOR));
- setTexture(texture);
- setColor(color);
- scheduleUpdate();
- return true;
- }
- void MotionStreak::setPosition(const Point& position)
- {
- _startingPositionInitialized = true;
- _positionR = position;
- }
- 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::draw()
- {
- if(_nuPoints <= 1)
- return;
- CC_NODE_DRAW_SETUP();
- 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(Vertex2F) * _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_COORDS, 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_COORDS, 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_DRAWS(1);
- }
- NS_CC_END