Function drawPointerMode

Samples/NiViewer/Draw.cpp:1040–1189

}

void drawPointerMode(IntPair* pPointer)
{
	char buf[512] = "";
	int nCharWidth = glutBitmapWidth(GLUT_BITMAP_HELVETICA_18, '0');
	int nPointerValue = 0;

	XnDouble dTimestampDivider = 1E6;

	const DepthMetaData* pDepthMD = getDepthMetaData();

	if (pDepthMD != NULL)
	{
		// Print the scale black background
		glEnable(GL_BLEND);
		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

		glBegin(GL_QUADS);
		glColor4f(0, 0, 0, 0.7);
		glVertex2i(0, WIN_SIZE_Y); // lower left
		glVertex2i(WIN_SIZE_X, WIN_SIZE_Y);
		glVertex2i(WIN_SIZE_X, WIN_SIZE_Y - 135);
		glVertex2i(0, WIN_SIZE_Y - 135);
		glEnd();

		glDisable(GL_BLEND);

		// set a large point size (for the scale)
		glPointSize(15);

		// Print the scale data
		glBegin(GL_POINTS);
		for (int i = 0; i < pDepthMD->ZRes(); i+=1)
		{
			float fNewColor = g_pDepthHist[i];
			if ((fNewColor > 0.004) && (fNewColor < 0.996))
			{
				glColor3f(fNewColor, fNewColor, 0);
				glVertex3f(((i/10)*2), WIN_SIZE_Y - 23, 1);
			}
		}
		glEnd();

		// Print the pointer scale data
		if (pPointer != NULL)
		{
			// make sure pointer in on a depth pixel (take in mind cropping might be in place)
			IntPair pointerInDepth = *pPointer;
			pointerInDepth.X -= pDepthMD->XOffset();
			pointerInDepth.Y -= pDepthMD->YOffset();

			if (pointerInDepth.X < (int)pDepthMD->XRes() && pointerInDepth.Y < (int)pDepthMD->YRes())
			{
				nPointerValue = (*pDepthMD)(pointerInDepth.X, pointerInDepth.Y);

				glBegin(GL_POINTS);
				glColor3f(1,0,0);
				glVertex3f(10 + ((nPointerValue/10)*2), WIN_SIZE_Y - 70, 1);
				glEnd();