void Viz::drawhist()

in roboschool/cpp-household/render-hud.cpp [109:144]

• 32 lines of code
• 6 McCabe index (conditional complexity)

void Viz::drawhist(
	QPainter& p,
	const char* label, int bracketn,
	const QRect& r,
	const float* sensors_hist,
	const float* sensors)
{
	QColor bg = Qt::black;
	bg.setAlpha(100);
	p.setCompositionMode(QPainter::CompositionMode_Source);
	p.fillRect(r, bg);

	int mid_y = r.center().y();
	float half_height = r.height()*0.5f;
	QImage& img = render_viewport->hud_image;

	for (int h=0; h<HIST; h++) {
		int x = r.left() + h;
		float clamp = sensors_hist[h]*0.5;
		if (clamp > 1.0f) clamp = 1.0f;
		if (clamp < -1.0f) clamp = -1.0f;
		int mag = int( 0.5 + mid_y - clamp*half_height );
		for (int y=mid_y; y<mag; y++)
			img.setPixel(x, y, 0xFFFF8080);
		for (int y=mid_y; y>=mag; y--)
			img.setPixel(x, y, 0xFF80FF80);
	}

	char buf[100];
	snprintf(buf, sizeof(buf), "%s[%02i] = %+0.2f", label, bracketn, sensors[0]);
	p.setCompositionMode(QPainter::CompositionMode_SourceOver);
	p.setOpacity(0.7);
	p.drawText(r, QString::fromUtf8(buf), Qt::AlignLeft|Qt::AlignTop);

	render_viewport->hud_update(r);
}