Math: Difference between revisions
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=== RGBtoHSV === | === RGBtoHSV === | ||
TODO | Given a <tt>C3Vector</tt> representing a color in the RGB (red, green, blue) color model, set a <tt>C3Vector</tt> to an equivalent color in the HSV (hue, saturation, value) color model. | ||
<syntaxhighlight lang="cpp"> | |||
// TODO | |||
</syntaxhighlight> |
Revision as of 18:12, 6 May 2017
C3Ray
C3Ray::FromStartEnd
TODO
C3Vector
C3Vector::Mag
Given a C3Vector, calculate and return the magnitude of the vector.
long double C3Vector::Mag(C3Vector *this) {
float v2;
v2 = this->x * this->x + this->y * this->y + this->z * this->z;
return sqrt(v2);
}
C3Vector::MajorAxis
Given a C3Vector, return an integer representing the offset of the vector's major axis.
signed int C3Vector::MajorAxis(C3Vector *this) {
float fx = fabs(this->x);
float fy = fabs(this->y);
float fz = fabs(this->z);
if (fx > fy && fx > fz) {
return 0;
} else if (fy > fz) {
return 1;
} else {
return 2;
}
}
C3Vector::MinorAxis
Given a C3Vector, return an integer representing the offset of the vector's minor axis.
signed int C3Vector::MinorAxis(C3Vector *this) {
float fx = fabs(this->x);
float fy = fabs(this->y);
float fz = fabs(this->z);
if (fz < fy && fz < fx) {
return 2;
} else if (fy < fx) {
return 1;
} else {
return 0;
}
}
CMath
CMath::split
Given an input of float xf, assign the integer part to int xi, and the fractional (radix) part to float xr.
void CMath::split(float xf, float *xr, int *xi) {
if (xf <= 0.0f) {
*xi = xf - 1;
*xr = xf - *xi;
} else {
*xi = xf;
*xr = xf - *xi;
}
}
CMath::sinoid
Approximates sine for the given input float a1. This function is typically inlined.
double CMath::sinoid(float a1) {
int xi;
float xr;
float v1 = (a1 * M_1_PI) - 0.5;
CMath::split(v1, &xr, &xi);
double result = 1.0 - xr * ((6.0 - 4.0 * xr) * xr);
if (xi & 1) {
result = -result;
}
return result;
}
CMath::cosoid
Approximates cosine for the given input float a1. This function is typically inlined.
double CMath::cosoid(float a1) {
int xi;
float xr;
float v1 = a1 * M_1_PI;
CMath::split(v1, &xr, &xi);
double result = 1.0 - xr * ((6.0 - 4.0 * xr) * xr);
if (xi & 1) {
result = -result;
}
return result;
}
NTempest
NTempest::DistanceFromPolygon
TODO
NTempest::Intersect
TODO
Other
HSVtoRGB
Given a C3Vector representing a color in the HSV (hue, saturation, value) color model, set a C3Vector to an equivalent color in the RGB (red, green, blue) color model.
// TODO
RGBtoHSV
Given a C3Vector representing a color in the RGB (red, green, blue) color model, set a C3Vector to an equivalent color in the HSV (hue, saturation, value) color model.
// TODO