示例#1
0
void Constellation::drawName(StelPainter& sPainter, ConstellationMgr::ConstellationDisplayStyle style) const
{
	if (!nameFader.getInterstate())
		return;

	if (checkVisibility())
	{
		QString name;
		switch (style)
		{
			case ConstellationMgr::constellationsTranslated:
				name=nameI18;
				break;
			case ConstellationMgr::constellationsNative:
				name=nativeName;
				break;
			case ConstellationMgr::constellationsEnglish:
				name=englishName;
				break;
			case ConstellationMgr::constellationsAbbreviated:
				name=(abbreviation.startsWith('.') ? "" : abbreviation);
				break;
			Q_ASSERT(0);
		}

		sPainter.setColor(labelColor[0], labelColor[1], labelColor[2], nameFader.getInterstate());
		sPainter.drawText(XYname[0], XYname[1], name, 0., -sPainter.getFontMetrics().width(name)/2, 0, false);
	}
}
bool SkyLabel::draw(StelCore* core, StelPainter& sPainter)
{
	if(labelFader.getInterstate() <= 0.0)
		return false;

	Vec3d objectPos = labelObject->getJ2000EquatorialPos(core);
	Vec3d labelXY;
	sPainter.getProjector()->project(objectPos,labelXY);

	sPainter.setFont(labelFont);
			
	double xOffset(0.);
	double yOffset(0.);
	char hJustify = 'c';
	char vJustify = 'c';

	if (labelSide.toUpper().contains("N"))
	{
		yOffset = 1.0;
		vJustify = 'b'; // bottom justify text
	}
	else if (labelSide.toUpper().contains("S"))
	{
		yOffset = -1.0;
		vJustify = 't'; // top justufy text
	}

	if (labelSide.toUpper().contains("E"))
	{
		xOffset = 1.0;
		hJustify = 'l'; // right justify text
	}
	else if (labelSide.toUpper().contains("W"))
	{
		xOffset = -1.0;
		hJustify = 'r'; // left justify text
	}

	if (labelDistance >= 0.0)
	{
		xOffset *= labelDistance;
		yOffset *= labelDistance;
	}
	else
	{
		float shift = 4.f + labelObject->getAngularSize(core)*M_PI/180.*sPainter.getProjector()->getPixelPerRadAtCenter()/1.8f;
		// use the object size
		xOffset *= shift;
		yOffset *= shift;
	}

	double jxOffset(0.);
	double jyOffset(0.); 
	if (hJustify == 'r')
		jxOffset = sPainter.getFontMetrics().width(labelText);
	else if (hJustify == 'c')
		jxOffset = sPainter.getFontMetrics().width(labelText) / 2.;

	if (vJustify == 't')
		jyOffset = sPainter.getFontMetrics().height();
	else if (vJustify == 'c')
		jyOffset = sPainter.getFontMetrics().height() / 2.;

	sPainter.setColor(labelColor[0], labelColor[1], labelColor[2], labelFader.getInterstate());
	sPainter.drawText(labelXY[0]+xOffset-jxOffset, labelXY[1]+yOffset-jyOffset, labelText, 0, 0, 0, false);

	if (labelStyle == SkyLabel::Line)
	{
		sPainter.enableTexture2d(false);
		glEnable(GL_BLEND);
		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

		// screen coordinates of object
		Vec3d objXY;
		sPainter.getProjector()->project(objectPos,objXY);

		double lineEndX = labelXY[0]+xOffset;
		double lineEndY = labelXY[1]+yOffset;

		if (vJustify == 'b')
			lineEndY -= 5;
		else if (vJustify == 't')
			lineEndY += 5;
				
		if (hJustify == 'l')
			lineEndX -= 5;
		else if (hJustify == 'r')
			lineEndX += 5;
				
		sPainter.setColor(labelColor[0], labelColor[1], labelColor[2], labelFader.getInterstate());
		
		sPainter.drawLine2d(lineEndX,lineEndY,objXY[0], objXY[1]);
	}

	return true;
}