//! Draw any parts on the screen which are for our module
void AngleMeasure::draw(StelCore* core)
{
if (lineVisible.getInterstate() < 0.000001f && messageFader.getInterstate() < 0.000001f)
return;
const StelProjectorP prj = core->getProjection(StelCore::FrameEquinoxEqu);
StelPainter painter(prj);
painter.setFont(font);
if (lineVisible.getInterstate() > 0.000001f)
{
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
glEnable(GL_TEXTURE_2D);
Vec3d xy;
QString displayedText;
if (prj->project(perp1EndPoint,xy))
{
painter.setColor(textColor[0], textColor[1], textColor[2], lineVisible.getInterstate());
if (flagShowPA)
displayedText = QString("%1 (%2%3)").arg(calculateAngle(), messagePA, calculatePositionAngle(startPoint, endPoint));
else
displayedText = calculateAngle();
painter.drawText(xy[0], xy[1], displayedText, 0, 15, 15);
}
glDisable(GL_TEXTURE_2D);
// OpenGL ES 2.0 doesn't have GL_LINE_SMOOTH
// glEnable(GL_LINE_SMOOTH);
glEnable(GL_BLEND);
// main line is a great circle
painter.setColor(lineColor[0], lineColor[1], lineColor[2], lineVisible.getInterstate());
painter.drawGreatCircleArc(startPoint, endPoint, NULL);
// End lines
painter.drawGreatCircleArc(perp1StartPoint, perp1EndPoint, NULL);
painter.drawGreatCircleArc(perp2StartPoint, perp2EndPoint, NULL);
}
if (messageFader.getInterstate() > 0.000001f)
{
painter.setColor(textColor[0], textColor[1], textColor[2], messageFader.getInterstate());
int x = 83;
int y = 120;
int ls = painter.getFontMetrics().lineSpacing();
painter.drawText(x, y, messageEnabled);
y -= ls;
painter.drawText(x, y, messageLeftButton);
y -= ls;
painter.drawText(x, y, messageRightButton);
}
}
void AngleMeasure::drawOne(StelCore *core, const StelCore::FrameType frameType, const StelCore::RefractionMode refractionMode, const Vec3f txtColor, const Vec3f lineColor)
{
const StelProjectorP prj = core->getProjection(frameType, refractionMode);
StelPainter painter(prj);
painter.setFont(font);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
if (lineVisible.getInterstate() > 0.000001f)
{
Vec3d xy;
QString displayedText;
if (frameType==StelCore::FrameEquinoxEqu)
{
if (prj->project(perp1EndPoint,xy))
{
painter.setColor(txtColor[0], txtColor[1], txtColor[2], lineVisible.getInterstate());
if (flagShowPA)
displayedText = QString("%1 (%2%3)").arg(calculateAngle(), messagePA, calculatePositionAngle(startPoint, endPoint));
else
displayedText = calculateAngle();
painter.drawText(xy[0], xy[1], displayedText, 0, 15, 15);
}
}
else
{
if (prj->project(perp1EndPointHor,xy))
{
painter.setColor(txtColor[0], txtColor[1], txtColor[2], lineVisible.getInterstate());
if (flagShowHorizontalPA)
displayedText = QString("%1 (%2%3)").arg(calculateAngle(true), messagePA, calculatePositionAngle(startPointHor, endPointHor));
else
displayedText = calculateAngle(true);
painter.drawText(xy[0], xy[1], displayedText, 0, 15, -5);
}
}
glDisable(GL_TEXTURE_2D);
// OpenGL ES 2.0 doesn't have GL_LINE_SMOOTH. But it looks much better.
#ifdef GL_LINE_SMOOTH
if (QOpenGLContext::currentContext()->format().renderableType()==QSurfaceFormat::OpenGL)
glEnable(GL_LINE_SMOOTH);
#endif
// main line is a great circle
painter.setColor(lineColor[0], lineColor[1], lineColor[2], lineVisible.getInterstate());
if (frameType==StelCore::FrameEquinoxEqu)
{
painter.drawGreatCircleArc(startPoint, endPoint, NULL);
// End lines
painter.drawGreatCircleArc(perp1StartPoint, perp1EndPoint, NULL);
painter.drawGreatCircleArc(perp2StartPoint, perp2EndPoint, NULL);
}
else
{
painter.drawGreatCircleArc(startPointHor, endPointHor, NULL);
// End lines
painter.drawGreatCircleArc(perp1StartPointHor, perp1EndPointHor, NULL);
painter.drawGreatCircleArc(perp2StartPointHor, perp2EndPointHor, NULL);
}
#ifdef GL_LINE_SMOOTH
if (QOpenGLContext::currentContext()->format().renderableType()==QSurfaceFormat::OpenGL)
glDisable(GL_LINE_SMOOTH);
#endif
}
if (messageFader.getInterstate() > 0.000001f)
{
painter.setColor(txtColor[0], txtColor[1], txtColor[2], messageFader.getInterstate());
int x = 83;
int y = 120;
int ls = painter.getFontMetrics().lineSpacing();
painter.drawText(x, y, messageEnabled);
y -= ls;
painter.drawText(x, y, messageLeftButton);
y -= ls;
painter.drawText(x, y, messageRightButton);
}
glDisable(GL_BLEND);
}
