public static float vecLen(Vec3f *ptr)
{
var x = ptr->x;
var y = ptr->y;
var z = ptr->z;
return(fsqrt((x * x) + (y * y) + (z * z)));
}
public static void vecAdd(Vec3f *a, Vec3f *b, Vec3f *ptr)
{
vecStore(
a->x + b->x,
a->y + b->y,
a->z + b->z,
ptr
);
}
public static void vecScale(Vec3f *a, float scale, Vec3f *ptr)
{
vecStore(
a->x * scale,
a->y * scale,
a->z * scale,
ptr
);
}
public static void vecNormalize(Vec3f *ptr)
{
var x = ptr->x;
var y = ptr->y;
var z = ptr->z;
float invLen = 1.0f / fsqrt((x * x) + (y * y) + (z * z));
vecStore(x * invLen, y * invLen, z * invLen, ptr);
}
public static void sampleEnv(Vec3f *dir, Vec3f *ptr)
{
var y = dir->y;
var amt = y * 0.5f + 0.5f;
var keep = 1.0f - amt;
vecStore(
keep * 0.1f + amt * 0.1f,
keep * 1.0f + amt * 0.1f,
keep * 0.1f + amt * 1.0f,
ptr
);
}
public static float vecNLDot(Vec3f *a, Vec3f *b)
{
var value = vecDot(a, b);
if (value < 0)
{
return(0);
}
else
{
return(value);
}
}
public static void init(int w, int h, int pFrameBuffer)
{
width = w;
height = h;
frame_buffer = &U8.Base[pFrameBuffer];
var pScratch = pFrameBuffer + (width * height * BytesPerPixel) + 1024;
var scratch = (Vec3f *)&U8.Base[pScratch];
// FIXME
pos = &scratch[0];
dir = &scratch[1];
light = &scratch[2];
half = &scratch[3];
color = &scratch[4];
intersection_normal = &scratch[5];
}
public static void init (int w, int h, int pFrameBuffer) {
width = w;
height = h;
frame_buffer = &U8.Base[pFrameBuffer];
var pScratch = pFrameBuffer + (width * height * BytesPerPixel) + 1024;
var scratch = (Vec3f*)&U8.Base[pScratch];
// FIXME
pos = &scratch[0];
dir = &scratch[1];
light = &scratch[2];
half = &scratch[3];
color = &scratch[4];
intersection_normal = &scratch[5];
}
public static void vecStore(float x, float y, float z, Vec3f *ptr)
{
ptr->x = x;
ptr->y = y;
ptr->z = z;
}
public static float vecDot(Vec3f *a, Vec3f *b)
{
return((a->x * b->x) + (a->y * b->y) + (a->z * b->z));
}
