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47 lines
1.5 KiB
C++
47 lines
1.5 KiB
C++
#include "common.h"
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void
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CVector::Normalise(void)
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{
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float sq = MagnitudeSqr();
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if (sq > 0.0f) {
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float invsqrt = RecipSqrt(sq);
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x *= invsqrt;
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y *= invsqrt;
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z *= invsqrt;
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} else
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x = 1.0f;
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}
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CVector
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CrossProduct(const CVector &v1, const CVector &v2)
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{
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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);
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}
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CVector
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Multiply3x3(const CMatrix &mat, const CVector &vec)
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{
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// TODO: VU0 code
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return CVector(mat.m_matrix.right.x * vec.x + mat.m_matrix.up.x * vec.y + mat.m_matrix.at.x * vec.z,
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mat.m_matrix.right.y * vec.x + mat.m_matrix.up.y * vec.y + mat.m_matrix.at.y * vec.z,
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mat.m_matrix.right.z * vec.x + mat.m_matrix.up.z * vec.y + mat.m_matrix.at.z * vec.z);
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}
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CVector
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Multiply3x3(const CVector &vec, const CMatrix &mat)
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{
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return CVector(mat.m_matrix.right.x * vec.x + mat.m_matrix.right.y * vec.y + mat.m_matrix.right.z * vec.z,
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mat.m_matrix.up.x * vec.x + mat.m_matrix.up.y * vec.y + mat.m_matrix.up.z * vec.z,
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mat.m_matrix.at.x * vec.x + mat.m_matrix.at.y * vec.y + mat.m_matrix.at.z * vec.z);
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}
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CVector
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operator*(const CMatrix &mat, const CVector &vec)
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{
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// TODO: VU0 code
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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,
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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,
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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);
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}
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