C++ StelProjectorP::projectCheck方法代码示例

void NavStars::draw(StelCore* core)
{
	// Drawing is enabled?
	if (markerFader.getInterstate() <= 0.0)
	{
		return;
	}
	
	if (stars.isEmpty())
	{
		StelObjectMgr* omgr = GETSTELMODULE(StelObjectMgr);
		stars.fill(StelObjectP(), starNumbers.size());
		for (int i = 0; i < starNumbers.size(); ++i)
		{
			QString name = QString("HIP %1").arg(starNumbers.at(i));
			stars[i] = omgr->searchByName(name);
		}
	}

	StelProjectorP prj = core->getProjection(StelCore::FrameJ2000);
	StelPainter painter(prj);
	
	Vec3d pos;
	for (int i = 0; i < starNumbers.size(); ++i)
	{
		if (stars[i].isNull())
			continue;
		
		// Get the current position of the navigational star...
		if (prj->projectCheck(stars[i]->getJ2000EquatorialPos(core), pos))
		{
			// ... and draw a marker around it
			if (!markerTexture.isNull())
			{
				glEnable(GL_BLEND);
				painter.enableTexture2d(true);
				glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
				painter.setColor(markerColor[0], markerColor[1], markerColor[2], markerFader.getInterstate());
				markerTexture->bind();
				painter.drawSprite2dMode(pos[0], pos[1], 11.f);
			}

			// Draw the localized name of the star and its ordinal number
			QString label = stars[i]->getNameI18n();
			if (label.isEmpty())
				label = QString("%1").arg(i+1);
			else
				label = QString("%1 (%2)").arg(label).arg(i+1);
			painter.drawText(pos[0], pos[1], label, 0, 10.f, 10.f, false);
		}
	}

}

// Draw the names of all the constellations
void ConstellationMgr::drawNames(StelRenderer* renderer, StelProjectorP projector, QFont& font) const
{
	renderer->setBlendMode(BlendMode_Alpha);
	vector < Constellation * >::const_iterator iter;
	for (iter = asterisms.begin(); iter != asterisms.end(); iter++)
	{
		// Check if in the field of view
		if (projector->projectCheck((*iter)->XYZname, (*iter)->XYname))
		{
			(*iter)->drawName(renderer, font);\
		}
	}
}

void TelescopeControl::draw(StelCore* core)
{
	const StelProjectorP prj = core->getProjection(StelCore::FrameJ2000);
	StelPainter sPainter(prj);
	sPainter.setFont(labelFont);
	reticleTexture->bind();	
	foreach (const TelescopeClientP& telescope, telescopeClients)
	{
		if (telescope->isConnected() && telescope->hasKnownPosition())
		{
			Vec3d XY;
			if (prj->projectCheck(telescope->getJ2000EquatorialPos(core), XY))
			{
				//Telescope circles appear synchronously with markers
				if (circleFader.getInterstate() >= 0)
				{
					sPainter.setColor(circleColor[0], circleColor[1], circleColor[2], circleFader.getInterstate());
					glDisable(GL_TEXTURE_2D);
					foreach (double circle, telescope->getOculars())
					{
						sPainter.drawCircle(XY[0], XY[1], 0.5 * prj->getPixelPerRadAtCenter() * (M_PI/180) * (circle));
					}
					glEnable(GL_TEXTURE_2D);
				}
				if (reticleFader.getInterstate() >= 0)
				{
					glEnable(GL_TEXTURE_2D);
					glEnable(GL_BLEND);
					glBlendFunc(GL_SRC_ALPHA, GL_ONE);
					sPainter.setColor(reticleColor[0], reticleColor[1], reticleColor[2], reticleFader.getInterstate());
					sPainter.drawSprite2dMode(XY[0],XY[1],15.f);
					glDisable(GL_TEXTURE_2D);
				}
				if (labelFader.getInterstate() >= 0)
				{
					sPainter.setColor(labelColor[0], labelColor[1], labelColor[2], labelFader.getInterstate());
					//TODO: Different position of the label if circles are shown?
					//TODO: Remove magic number (text spacing)
					sPainter.drawText(XY[0], XY[1], telescope->getNameI18n(), 0, 6 + 10, -4, false);
					//Same position as the other objects: doesn't work, telescope label overlaps object label
					//sPainter.drawText(XY[0], XY[1], scope->getNameI18n(), 0, 10, 10, false);
					reticleTexture->bind();
				}
			}
		}