new C++ demo: realtime.cc (real-time scene viewer using SDL) Quaternion, Camera::rotate and Camera::move replace all printf's with infomsg wrapper don't allocate memory in Raytracer::render, just blindly write to provided address don't creat Container object in Raytracer, let user do it

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#ifndef COMMON_H

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#define COMMON_H

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#include <stdio.h>

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#include <stdarg.h>

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#include <float.h>

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#define Eps 1e-6

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#define Inf FLT_MAX

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inline void infomsg(const char *format, ...)

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{

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#ifndef PYRIT_QUITE

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	va_list ap;

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	va_start(ap, format);

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	vprintf(format, ap);

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	va_end(ap);

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#endif

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}

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#endif