Dot product shadow intensity lookup table...completely broken and slow

gistfile1.c

static bool hasGeneratedLookup = false;
#define DOT_LOOKUP_SIZE 1024
#define DOT_LOOKUP_BITMASK 1023
static uint8 colorDotLookup[DOT_LOOKUP_SIZE];
/*
 * Below code - waste of time; too slow.
 */
inline uint8 hdColorDot(float color, float normal)
{
	unsigned i;
	float lookupColor, lookupNormal, lookupStep;
	
	if (!hasGeneratedLookup)
	{
		lookupStep = 1.0f / (float)DOT_LOOKUP_SIZE;
		memset(colorDotLookup, 0, sizeof(colorDotLookup));
		
		lookupColor = lookupNormal = 0.0f;
		
		for (i = 0; i < DOT_LOOKUP_SIZE; ++i)
		{
			colorDotLookup[i] = (uint8)((int)(255 * lookupColor)) & DOT_LOOKUP_BITMASK;
			lookupColor += lookupStep;
		}
		hasGeneratedLookup = true;
	}
	
	return colorDotLookup[((uint32)(color * normal * DOT_LOOKUP_SIZE)) & DOT_LOOKUP_BITMASK];
}