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Small but effective optimisations.

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Allow inlining the function helps a bit!
This commit is contained in:
Godzil
2020-03-13 01:04:56 +00:00
parent 4f2e327533
commit 5b6b627a43
4 changed files with 25 additions and 7 deletions
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9
source/include/matrix.h
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@@ -19,6 +19,8 @@
#undef minor
#endif
#define FastGet4(_x, _y) (this->data[4 * (_x) + (_y)])
class Matrix
{
protected:
@@ -46,7 +48,12 @@ public:
bool isInvertible() { return this->determinant() != 0; }
Matrix operator*(const Matrix &b) const;
Tuple operator*(const Tuple &b) const;
Tuple operator*(const Tuple &b) const {
return Tuple(b.x * FastGet4(0, 0) + b.y * FastGet4(0, 1) + b.z * FastGet4(0, 2) + b.w * FastGet4(0, 3),
b.x * FastGet4(1, 0) + b.y * FastGet4(1, 1) + b.z * FastGet4(1, 2) + b.w * FastGet4(1, 3),
b.x * FastGet4(2, 0) + b.y * FastGet4(2, 1) + b.z * FastGet4(2, 2) + b.w * FastGet4(2, 3),
b.x * FastGet4(3, 0) + b.y * FastGet4(3, 1) + b.z * FastGet4(3, 2) + b.w * FastGet4(3, 3));
}
};
class Matrix4: public Matrix

14
source/include/tuple.h
View File

@@ -44,8 +44,18 @@ public:
void set(double nX, double nY, double nZ) { this->x = nX; this->y = nY; this->z = nZ; };
double magnitude();
Tuple normalise();
double dot(const Tuple &b);
Tuple cross(const Tuple &b) const;
double dot(const Tuple &b) {
return this->x * b.x + this->y * b.y + this->z * b.z + this->w * b.w;
}
Tuple cross(const Tuple &b) const {
return Tuple(this->y * b.z - this->z * b.y,
this->z * b.x - this->x * b.z,
this->x * b.y - this->y * b.x,
0);
}
Tuple reflect(const Tuple &normal);
};