void BeginStencilCommand::init(float depth, bool inverted, float alphaThreshold, Node* stencil, bool clearStencil)
{
_globalOrder = depth;
_inverted = inverted;
_alphaThreshold = alphaThreshold;
_stencil = stencil;
_clearStencil = clearStencil;
if (_stencil && _alphaThreshold < 1)
{
#if (CC_TARGET_PLATFORM == CC_PLATFORM_MAC || CC_TARGET_PLATFORM == CC_PLATFORM_WIN32 || CC_TARGET_PLATFORM == CC_PLATFORM_LINUX)
#else
// since glAlphaTest do not exists in OES, use a shader that writes
// pixel only if greater than an alpha threshold
GLProgram *program = GLProgramCache::getInstance()->getGLProgram(GLProgram::SHADER_NAME_POSITION_TEXTURE_ALPHA_TEST_NO_MV);
GLint alphaValueLocation = glGetUniformLocation(program->getProgram(), GLProgram::UNIFORM_NAME_ALPHA_TEST_VALUE);
// set our alphaThreshold
program->use();
program->setUniformLocationWith1f(alphaValueLocation, _alphaThreshold);
// we need to recursively apply this shader to all the nodes in the stencil node
// FIXME: we should have a way to apply shader to all nodes without having to do this
setProgram(_stencil, program);
#endif
}
}
void ClippingNode::visit(Renderer *renderer, const Mat4 &parentTransform, uint32_t parentFlags)
{
if (!_visible || !hasContent())
return;
uint32_t flags = processParentFlags(parentTransform, parentFlags);
// IMPORTANT:
// To ease the migration to v3.0, we still support the Mat4 stack,
// but it is deprecated and your code should not rely on it
Director* director = Director::getInstance();
CCASSERT(nullptr != director, "Director is null when setting matrix stack");
director->pushMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW);
director->loadMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW, _modelViewTransform);
//Add group command
_groupCommand.init(_globalZOrder);
renderer->addCommand(&_groupCommand);
renderer->pushGroup(_groupCommand.getRenderQueueID());
_beforeVisitCmd.init(_globalZOrder);
_beforeVisitCmd.func = CC_CALLBACK_0(StencilStateManager::onBeforeVisit, _stencilStateManager);
renderer->addCommand(&_beforeVisitCmd);
auto alphaThreshold = this->getAlphaThreshold();
if (alphaThreshold < 1)
{
#if CC_CLIPPING_NODE_OPENGLES
// since glAlphaTest do not exists in OES, use a shader that writes
// pixel only if greater than an alpha threshold
GLProgram *program = GLProgramCache::getInstance()->getGLProgram(GLProgram::SHADER_NAME_POSITION_TEXTURE_ALPHA_TEST_NO_MV);
GLint alphaValueLocation = glGetUniformLocation(program->getProgram(), GLProgram::UNIFORM_NAME_ALPHA_TEST_VALUE);
// set our alphaThreshold
program->use();
program->setUniformLocationWith1f(alphaValueLocation, alphaThreshold);
// we need to recursively apply this shader to all the nodes in the stencil node
// FIXME: we should have a way to apply shader to all nodes without having to do this
setProgram(_stencil, program);
#endif
}
_stencil->visit(renderer, _modelViewTransform, flags);
_afterDrawStencilCmd.init(_globalZOrder);
_afterDrawStencilCmd.func = CC_CALLBACK_0(StencilStateManager::onAfterDrawStencil, _stencilStateManager);
renderer->addCommand(&_afterDrawStencilCmd);
int i = 0;
bool visibleByCamera = isVisitableByVisitingCamera();
if(!_children.empty())
{
sortAllChildren();
// draw children zOrder < 0
for(auto size = _children.size(); i < size; ++i)
{
auto node = _children.at(i);
if ( node && node->getLocalZOrder() < 0 )
node->visit(renderer, _modelViewTransform, flags);
else
break;
}
// self draw
if (visibleByCamera)
this->draw(renderer, _modelViewTransform, flags);
for(auto it=_children.cbegin()+i, itCend = _children.cend(); it != itCend; ++it)
(*it)->visit(renderer, _modelViewTransform, flags);
}
else if (visibleByCamera)
{
this->draw(renderer, _modelViewTransform, flags);
}
_afterVisitCmd.init(_globalZOrder);
_afterVisitCmd.func = CC_CALLBACK_0(StencilStateManager::onAfterVisit, _stencilStateManager);
renderer->addCommand(&_afterVisitCmd);
renderer->popGroup();
director->popMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW);
}
void ClippingNode::visit()
{
if(!_visible)
return;
kmGLPushMatrix();
transform();
//Add group command
Renderer* renderer = Director::getInstance()->getRenderer();
_groupCommand.init(0,_vertexZ);
renderer->addCommand(&_groupCommand);
renderer->pushGroup(_groupCommand.getRenderQueueID());
_beforeVisitCmd.init(0,_vertexZ);
_beforeVisitCmd.func = CC_CALLBACK_0(ClippingNode::onBeforeVisit, this);
renderer->addCommand(&_beforeVisitCmd);
if (_alphaThreshold < 1)
{
#if (CC_TARGET_PLATFORM == CC_PLATFORM_MAC || CC_TARGET_PLATFORM == CC_PLATFORM_WINDOWS || CC_TARGET_PLATFORM == CC_PLATFORM_LINUX)
#else
// since glAlphaTest do not exists in OES, use a shader that writes
// pixel only if greater than an alpha threshold
GLProgram *program = ShaderCache::getInstance()->getProgram(GLProgram::SHADER_NAME_POSITION_TEXTURE_ALPHA_TEST);
GLint alphaValueLocation = glGetUniformLocation(program->getProgram(), GLProgram::UNIFORM_NAME_ALPHA_TEST_VALUE);
// set our alphaThreshold
program->use();
program->setUniformLocationWith1f(alphaValueLocation, _alphaThreshold);
// we need to recursively apply this shader to all the nodes in the stencil node
// XXX: we should have a way to apply shader to all nodes without having to do this
setProgram(_stencil, program);
#endif
}
_stencil->visit();
_afterDrawStencilCmd.init(0,_vertexZ);
_afterDrawStencilCmd.func = CC_CALLBACK_0(ClippingNode::onAfterDrawStencil, this);
renderer->addCommand(&_afterDrawStencilCmd);
int i = 0;
if(!_children.empty())
{
sortAllChildren();
// draw children zOrder < 0
for( ; i < _children.size(); i++ )
{
auto node = _children.at(i);
if ( node && node->getZOrder() < 0 )
node->visit();
else
break;
}
// self draw
this->draw();
for(auto it=_children.cbegin()+i; it != _children.cend(); ++it)
(*it)->visit();
}
else
{
this->draw();
}
_afterVisitCmd.init(0,_vertexZ);
_afterVisitCmd.func = CC_CALLBACK_0(ClippingNode::onAfterVisit, this);
renderer->addCommand(&_afterVisitCmd);
renderer->popGroup();
kmGLPopMatrix();
}
void ClippingNode::visit(Renderer *renderer, const kmMat4 &parentTransform, bool parentTransformUpdated)
{
if(!_visible)
return;
bool dirty = parentTransformUpdated || _transformUpdated;
if(dirty)
_modelViewTransform = transform(parentTransform);
_transformUpdated = false;
// IMPORTANT:
// To ease the migration to v3.0, we still support the kmGL stack,
// but it is deprecated and your code should not rely on it
kmGLPushMatrix();
kmGLLoadMatrix(&_modelViewTransform);
//Add group command
_groupCommand.init(_globalZOrder);
renderer->addCommand(&_groupCommand);
renderer->pushGroup(_groupCommand.getRenderQueueID());
_beforeVisitCmd.init(_globalZOrder);
_beforeVisitCmd.func = CC_CALLBACK_0(ClippingNode::onBeforeVisit, this);
renderer->addCommand(&_beforeVisitCmd);
if (_alphaThreshold < 1)
{
#if (CC_TARGET_PLATFORM == CC_PLATFORM_MAC || CC_TARGET_PLATFORM == CC_PLATFORM_WINDOWS || CC_TARGET_PLATFORM == CC_PLATFORM_LINUX)
#else
// since glAlphaTest do not exists in OES, use a shader that writes
// pixel only if greater than an alpha threshold
GLProgram *program = ShaderCache::getInstance()->getProgram(GLProgram::SHADER_NAME_POSITION_TEXTURE_ALPHA_TEST_NO_MV);
GLint alphaValueLocation = glGetUniformLocation(program->getProgram(), GLProgram::UNIFORM_NAME_ALPHA_TEST_VALUE);
// set our alphaThreshold
program->use();
program->setUniformLocationWith1f(alphaValueLocation, _alphaThreshold);
// we need to recursively apply this shader to all the nodes in the stencil node
// XXX: we should have a way to apply shader to all nodes without having to do this
setProgram(_stencil, program);
#endif
}
_stencil->visit(renderer, _modelViewTransform, dirty);
_afterDrawStencilCmd.init(_globalZOrder);
_afterDrawStencilCmd.func = CC_CALLBACK_0(ClippingNode::onAfterDrawStencil, this);
renderer->addCommand(&_afterDrawStencilCmd);
int i = 0;
if(!_children.empty())
{
sortAllChildren();
// draw children zOrder < 0
for( ; i < _children.size(); i++ )
{
auto node = _children.at(i);
if ( node && node->getLocalZOrder() < 0 )
node->visit(renderer, _modelViewTransform, dirty);
else
break;
}
// self draw
this->draw(renderer, _modelViewTransform, dirty);
for(auto it=_children.cbegin()+i; it != _children.cend(); ++it)
(*it)->visit(renderer, _modelViewTransform, dirty);
}
else
{
this->draw(renderer, _modelViewTransform, dirty);
}
_afterVisitCmd.init(_globalZOrder);
_afterVisitCmd.func = CC_CALLBACK_0(ClippingNode::onAfterVisit, this);
renderer->addCommand(&_afterVisitCmd);
renderer->popGroup();
kmGLPopMatrix();
}