void MaskShaderEffect::buildCustomUniforms()
{
GLProgram *shader = getShaderProgram();
_uniformTouchPoint = shader->getUniformLocation("touchPoint");
#ifndef ES_30_SUPPORT
_uniformCoefficient = shader->getUniformLocation("coefficient");
_uniformColor = shader->getUniformLocation("color");
#endif
}
bool BlurNode::init()
{
if (!Node::init())
return false;
// read and add my shader
GLProgram* program = GLProgram::createWithFilenames("ccShader_blur.vert", "BlurNormal.frag");
if (!program)
return false;
setShaderProgram(program);
// get uniform variable location
_uSolutionLocation = program->getUniformLocation("u_resolution");
// load texture2D
_texture = TextureCache::getInstance()->addImage("cballs.png");
if (!_texture)
return false;
_texture->retain();
setContentSize(_texture->getContentSize());
Size size = getContentSize();
// init vertices array and texCoord array
_vertices.push_back(Point::ZERO);
_vertices.push_back(Point(size.width, 0));
_vertices.push_back(Point(0, size.height));
_vertices.push_back(Point(size.width, size.height));
_texCoord.push_back(Point(0, 1));
_texCoord.push_back(Point(1, 1));
_texCoord.push_back(Point::ZERO);
_texCoord.push_back(Point(1, 0));
scheduleUpdate();
return true;
}
void BlurSpriteXY::initWeights()
{
m_uPixelSize->setData(m_pixelSize);
m_uRadius->setData(m_blurSize);
int end = m_blurSize * 2 + 1;
m_weights.resize(end);
const float pi = acosf(-1.0f);
float sq2 = sqrt(2.0f * pi);
float sqSigma2 = GameMathHelp::squre(m_simga);
float sum = 0.0f;
for (int i = 0; i < end; i++)
{
m_weights[i] = 1.0f / (m_simga * sq2) *
exp(-GameMathHelp::squre(i - m_blurSize) / (2 * sqSigma2));
sum += m_weights[i];
}
for (int i = 0; i < end; i++)
m_weights[i] /= sum;
GLProgram *glp = getGLProgram();
GLint weightLoc = glp->getUniformLocation("u_weights");
glUniform1fv(weightLoc, end, m_weights.data());
m_weightNeedInit = false;
//log("init weight, sum = %f, end = %d", sum, end);
}
