From 38ec1bd50de234faf476daa15ea41778a860ca0b Mon Sep 17 00:00:00 2001 From: Sergeanur Date: Mon, 14 Sep 2020 20:48:49 +0300 Subject: Move a bunch of math to cpp files + small fixes --- src/math/Vector.cpp | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 src/math/Vector.cpp (limited to 'src/math/Vector.cpp') diff --git a/src/math/Vector.cpp b/src/math/Vector.cpp new file mode 100644 index 00000000..42e1828e --- /dev/null +++ b/src/math/Vector.cpp @@ -0,0 +1,46 @@ +#include "common.h" + +void +CVector::Normalise(void) +{ + float sq = MagnitudeSqr(); + if (sq > 0.0f) { + float invsqrt = RecipSqrt(sq); + x *= invsqrt; + y *= invsqrt; + z *= invsqrt; + } else + x = 1.0f; +} + +CVector +CrossProduct(const CVector &v1, const CVector &v2) +{ + return CVector(v1.y * v2.z - v1.z * v2.y, v1.z * v2.x - v1.x * v2.z, v1.x * v2.y - v1.y * v2.x); +} + +CVector +Multiply3x3(const CMatrix &mat, const CVector &vec) +{ + // TODO: VU0 code + return CVector(mat.m_matrix.right.x * vec.x + mat.m_matrix.up.x * vec.y + mat.m_matrix.at.x * vec.z, + mat.m_matrix.right.y * vec.x + mat.m_matrix.up.y * vec.y + mat.m_matrix.at.y * vec.z, + mat.m_matrix.right.z * vec.x + mat.m_matrix.up.z * vec.y + mat.m_matrix.at.z * vec.z); +} + +CVector +Multiply3x3(const CVector &vec, const CMatrix &mat) +{ + return CVector(mat.m_matrix.right.x * vec.x + mat.m_matrix.right.y * vec.y + mat.m_matrix.right.z * vec.z, + mat.m_matrix.up.x * vec.x + mat.m_matrix.up.y * vec.y + mat.m_matrix.up.z * vec.z, + mat.m_matrix.at.x * vec.x + mat.m_matrix.at.y * vec.y + mat.m_matrix.at.z * vec.z); +} + +CVector +operator*(const CMatrix &mat, const CVector &vec) +{ + // TODO: VU0 code + return CVector(mat.m_matrix.right.x * vec.x + mat.m_matrix.up.x * vec.y + mat.m_matrix.at.x * vec.z + mat.m_matrix.pos.x, + mat.m_matrix.right.y * vec.x + mat.m_matrix.up.y * vec.y + mat.m_matrix.at.y * vec.z + mat.m_matrix.pos.y, + mat.m_matrix.right.z * vec.x + mat.m_matrix.up.z * vec.y + mat.m_matrix.at.z * vec.z + mat.m_matrix.pos.z); +} -- cgit v1.2.3