本文整理汇总了C++中QOpenGLFunctions_2_1::glGetFloatv方法的典型用法代码示例。如果您正苦于以下问题：C++ QOpenGLFunctions_2_1::glGetFloatv方法的具体用法？C++ QOpenGLFunctions_2_1::glGetFloatv怎么用？C++ QOpenGLFunctions_2_1::glGetFloatv使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类QOpenGLFunctions_2_1的用法示例。
在下文中一共展示了QOpenGLFunctions_2_1::glGetFloatv方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: drawMeOnly
void ccSNECloud::drawMeOnly(CC_DRAW_CONTEXT& context)
{
if (!MACRO_Foreground(context)) //2D foreground only
return; //do nothing
//draw point cloud
ccPointCloud::drawMeOnly(context);
//draw normal vectors
if (MACRO_Draw3D(context))
{
if (size() == 0) //no points -> bail!
return;
//get the set of OpenGL functions (version 2.1)
QOpenGLFunctions_2_1 *glFunc = context.glFunctions<QOpenGLFunctions_2_1>();
if (glFunc == nullptr) {
assert(false);
return;
}
//glDrawParams glParams;
//getDrawingParameters(glParams);
//get camera info
ccGLCameraParameters camera;
glFunc->glGetIntegerv(GL_VIEWPORT, camera.viewport);
glFunc->glGetDoublev(GL_PROJECTION_MATRIX, camera.projectionMat.data());
glFunc->glGetDoublev(GL_MODELVIEW_MATRIX, camera.modelViewMat.data());
const ccViewportParameters& viewportParams = context.display->getViewportParameters();
//get point size for drawing
float pSize;
glFunc->glGetFloatv(GL_POINT_SIZE, &pSize);
//draw normal vectors if highlighted
//if ((m_isHighlighted | m_isAlternate | m_isActive))
//{
//setup
if (pSize != 0)
{
glFunc->glPushAttrib(GL_LINE_BIT);
glFunc->glLineWidth(static_cast<GLfloat>(pSize));
}
glFunc->glMatrixMode(GL_MODELVIEW);
glFunc->glPushMatrix();
glFunc->glEnable(GL_BLEND);
//get normal vector properties
int thickID = getScalarFieldIndexByName("Thickness");
//int weightID = getScalarFieldIndexByName("Weight");
//float weight;
//float maxWeight = getScalarField( weightID )->getMax();
//draw normals
glFunc->glBegin(GL_LINES);
for (unsigned p = 0; p < size(); p++)
{
//get weight
//weight = getScalarField(weightID)->getValue(p);
//weight /= maxWeight;
//push colour
const ccColor::Rgb* col = m_currentDisplayedScalarField->getColor(m_currentDisplayedScalarField->getValue(p));
const ccColor::Rgba col4(col->r, col->g, col->b,200);
glFunc->glColor4ubv(col4.rgba);
//get length from thickness (if defined)
float length = 1.0;
if (thickID != -1)
{
length = getScalarField(thickID)->getValue(p);
}
//calculate start and end points of normal vector
const CCVector3 start = *getPoint(p);
CCVector3 end = start + (getPointNormal(p)*length);
//push line to opengl
ccGL::Vertex3v(glFunc, start.u);
ccGL::Vertex3v(glFunc, end.u);
}
glFunc->glEnd();
//cleanup
if (pSize != 0) {
glFunc->glPopAttrib();
}
glFunc->glPopMatrix();
}
}