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Add methods/properties to the Vector3 type to retrieve the length and normalize it.

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This commit is contained in:
Sandu Liviu Catalin 2016-08-04 03:34:16 +03:00
parent 6e7c14eafb
commit 2d726420e0
2 changed files with 104 additions and 0 deletions
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69
source/Base/Vector3.cpp
View File

@ -464,6 +464,69 @@ Vector3 Vector3::Abs() const
return Vector3(std::fabs(x), std::fabs(y), std::fabs(z));
}
// ------------------------------------------------------------------------------------------------
bool Vector3::IsNaN() const
{
return std::isnan(x) || std::isnan(y) || std::isnan(z);
}
// ------------------------------------------------------------------------------------------------
Vector3::Value Vector3::GetLength() const
{
return std::sqrt((x * x) + (y * y) + (z * z));
}
// ------------------------------------------------------------------------------------------------
void Vector3::SetLength(Value length)
{
Normalize();
// Assign the specified length
*this *= length;
}
// ------------------------------------------------------------------------------------------------
Vector3::Value Vector3::GetLengthSquared() const
{
return ((x * x) + (y * y) + (z * z));
}
// ------------------------------------------------------------------------------------------------
void Vector3::SetLengthSquared(Value length)
{
Normalize();
// Assign the specified length
*this *= std::sqrt(length);
}
// ------------------------------------------------------------------------------------------------
Vector3 Vector3::Normalized() const
{
const Value len_squared = GetLengthSquared();
if (!EpsEq(len_squared, STOVAL(1.0)) && EpsLt(len_squared, STOVAL(0.0)))
{
return (*this * (STOVAL(1.0) / std::sqrt(len_squared)));
}
else
{
return *this;
}
}
// ------------------------------------------------------------------------------------------------
void Vector3::Normalize()
{
const Value len_squared = GetLengthSquared();
if (!EpsEq(len_squared, STOVAL(1.0)) && EpsGt(len_squared, STOVAL(0.0)))
{
const Value inv_len = STOVAL(1.0) / std::sqrt(len_squared);
x *= inv_len;
y *= inv_len;
z *= inv_len;
}
}
// ------------------------------------------------------------------------------------------------
const Vector3 & Vector3::Get(CSStr str)
{
@ -565,6 +628,11 @@ void Register_Vector3(HSQUIRRELVM vm)
.Func< Vector3 (Vector3::*)(void) const >(_SC("_unm"), &Vector3::operator -)
// Properties
.Prop(_SC("Abs"), &Vector3::Abs)
.Prop(_SC("NaN"), &Vector3::IsNaN)
.Prop(_SC("Length"), &Vector3::GetLength, &Vector3::SetLength)
.Prop(_SC("LengthSq"), &Vector3::GetLengthSquared, &Vector3::SetLengthSquared)
.Prop(_SC("Normalized"), &Vector3::Normalized)
// Member Methods
.Func(_SC("SetScalar"), &Vector3::SetScalar)
.Func(_SC("SetVector3"), &Vector3::SetVector3)
@ -575,6 +643,7 @@ void Register_Vector3(HSQUIRRELVM vm)
.Func(_SC("SetQuaternionEx"), &Vector3::SetQuaternionEx)
.Func(_SC("SetStr"), &Vector3::SetStr)
.Func(_SC("Clear"), &Vector3::Clear)
.Func(_SC("Normalize"), &Vector3::Normalize)
// Member Overloads
.Overload< void (Vector3::*)(void) >(_SC("Generate"), &Vector3::Generate)
.Overload< void (Vector3::*)(Val, Val) >(_SC("Generate"), &Vector3::Generate)

35
source/Base/Vector3.hpp
View File

@ -339,6 +339,41 @@ struct Vector3
*/
Vector3 Abs() const;
/* --------------------------------------------------------------------------------------------
* Return whether is NaN.
*/
bool IsNaN() const;
/* --------------------------------------------------------------------------------------------
* Retrieve the length.
*/
Value GetLength() const;
/* --------------------------------------------------------------------------------------------
* Assign the length.
*/
void SetLength(Value length);
/* --------------------------------------------------------------------------------------------
* Return the squared length.
*/
Value GetLengthSquared() const;
/* --------------------------------------------------------------------------------------------
* Assign the squared length.
*/
void SetLengthSquared(Value length);
/* --------------------------------------------------------------------------------------------
* Return normalized to unit length.
*/
Vector3 Normalized() const;
/* --------------------------------------------------------------------------------------------
* Normalize to unit length.
*/
void Normalize();
/* --------------------------------------------------------------------------------------------
* Extract the values for components of the Vector3 type from a string.
*/