243 lines
8.8 KiB
C++
243 lines
8.8 KiB
C++
/** @file Inline implementation of the 4x4 matrix operators */
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#ifndef AI_MATRIX4x4_INL_INC
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#define AI_MATRIX4x4_INL_INC
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#include "aiMatrix4x4.h"
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#ifdef __cplusplus
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#include "aiMatrix3x3.h"
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#include <algorithm>
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#include <limits>
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#include <math.h>
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#include "aiAssert.h"
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#include "aiQuaternion.h"
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// ---------------------------------------------------------------------------
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inline aiMatrix4x4::aiMatrix4x4( const aiMatrix3x3& m)
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{
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a1 = m.a1; a2 = m.a2; a3 = m.a3; a4 = 0.0f;
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b1 = m.b1; b2 = m.b2; b3 = m.b3; b4 = 0.0f;
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c1 = m.c1; c2 = m.c2; c3 = m.c3; c4 = 0.0f;
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d1 = 0.0f; d2 = 0.0f; d3 = 0.0f; d4 = 1.0f;
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}
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// ---------------------------------------------------------------------------
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inline aiMatrix4x4& aiMatrix4x4::operator *= (const aiMatrix4x4& m)
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{
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*this = aiMatrix4x4(
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m.a1 * a1 + m.b1 * a2 + m.c1 * a3 + m.d1 * a4,
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m.a2 * a1 + m.b2 * a2 + m.c2 * a3 + m.d2 * a4,
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m.a3 * a1 + m.b3 * a2 + m.c3 * a3 + m.d3 * a4,
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m.a4 * a1 + m.b4 * a2 + m.c4 * a3 + m.d4 * a4,
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m.a1 * b1 + m.b1 * b2 + m.c1 * b3 + m.d1 * b4,
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m.a2 * b1 + m.b2 * b2 + m.c2 * b3 + m.d2 * b4,
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m.a3 * b1 + m.b3 * b2 + m.c3 * b3 + m.d3 * b4,
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m.a4 * b1 + m.b4 * b2 + m.c4 * b3 + m.d4 * b4,
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m.a1 * c1 + m.b1 * c2 + m.c1 * c3 + m.d1 * c4,
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m.a2 * c1 + m.b2 * c2 + m.c2 * c3 + m.d2 * c4,
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m.a3 * c1 + m.b3 * c2 + m.c3 * c3 + m.d3 * c4,
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m.a4 * c1 + m.b4 * c2 + m.c4 * c3 + m.d4 * c4,
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m.a1 * d1 + m.b1 * d2 + m.c1 * d3 + m.d1 * d4,
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m.a2 * d1 + m.b2 * d2 + m.c2 * d3 + m.d2 * d4,
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m.a3 * d1 + m.b3 * d2 + m.c3 * d3 + m.d3 * d4,
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m.a4 * d1 + m.b4 * d2 + m.c4 * d3 + m.d4 * d4);
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return *this;
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}
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// ---------------------------------------------------------------------------
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inline aiMatrix4x4 aiMatrix4x4::operator* (const aiMatrix4x4& m) const
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{
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aiMatrix4x4 temp( *this);
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temp *= m;
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return temp;
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}
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// ---------------------------------------------------------------------------
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inline aiMatrix4x4& aiMatrix4x4::Transpose()
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{
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std::swap( (float&)b1, (float&)a2);
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std::swap( (float&)c1, (float&)a3);
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std::swap( (float&)c2, (float&)b3);
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std::swap( (float&)d1, (float&)a4);
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std::swap( (float&)d2, (float&)b4);
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std::swap( (float&)d3, (float&)c4);
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return *this;
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}
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// ---------------------------------------------------------------------------
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inline float aiMatrix4x4::Determinant() const
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{
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return a1*b2*c3*d4 - a1*b2*c4*d3 + a1*b3*c4*d2 - a1*b3*c2*d4
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+ a1*b4*c2*d3 - a1*b4*c3*d2 - a2*b3*c4*d1 + a2*b3*c1*d4
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- a2*b4*c1*d3 + a2*b4*c3*d1 - a2*b1*c3*d4 + a2*b1*c4*d3
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+ a3*b4*c1*d2 - a3*b4*c2*d1 + a3*b1*c2*d4 - a3*b1*c4*d2
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+ a3*b2*c4*d1 - a3*b2*c1*d4 - a4*b1*c2*d3 + a4*b1*c3*d2
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- a4*b2*c3*d1 + a4*b2*c1*d3 - a4*b3*c1*d2 + a4*b3*c2*d1;
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}
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// ---------------------------------------------------------------------------
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inline aiMatrix4x4& aiMatrix4x4::Inverse()
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{
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// Compute the reciprocal determinant
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float det = Determinant();
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if(det == 0.0f)
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{
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*this = aiMatrix4x4(
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std::numeric_limits<float>::quiet_NaN(),std::numeric_limits<float>::quiet_NaN(),
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std::numeric_limits<float>::quiet_NaN(),std::numeric_limits<float>::quiet_NaN(),
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std::numeric_limits<float>::quiet_NaN(),std::numeric_limits<float>::quiet_NaN(),
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std::numeric_limits<float>::quiet_NaN(),std::numeric_limits<float>::quiet_NaN(),
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std::numeric_limits<float>::quiet_NaN(),std::numeric_limits<float>::quiet_NaN(),
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std::numeric_limits<float>::quiet_NaN(),std::numeric_limits<float>::quiet_NaN(),
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std::numeric_limits<float>::quiet_NaN(),std::numeric_limits<float>::quiet_NaN(),
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std::numeric_limits<float>::quiet_NaN(),std::numeric_limits<float>::quiet_NaN());
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return *this;
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}
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float invdet = 1.0f / det;
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aiMatrix4x4 res;
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res.a1 = invdet * (b2 * (c3 * d4 - c4 * d3) + b3 * (c4 * d2 - c2 * d4) + b4 * (c2 * d3 - c3 * d2));
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res.a2 = -invdet * (a2 * (c3 * d4 - c4 * d3) + a3 * (c4 * d2 - c2 * d4) + a4 * (c2 * d3 - c3 * d2));
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res.a3 = invdet * (a2 * (b3 * d4 - b4 * d3) + a3 * (b4 * d2 - b2 * d4) + a4 * (b2 * d3 - b3 * d2));
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res.a4 = -invdet * (a2 * (b3 * c4 - b4 * c3) + a3 * (b4 * c2 - b2 * c4) + a4 * (b2 * c3 - b3 * c2));
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res.b1 = -invdet * (b1 * (c3 * d4 - c4 * d3) + b3 * (c4 * d1 - c1 * d4) + b4 * (c1 * d3 - c3 * d1));
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res.b2 = invdet * (a1 * (c3 * d4 - c4 * d3) + a3 * (c4 * d1 - c1 * d4) + a4 * (c1 * d3 - c3 * d1));
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res.b3 = -invdet * (a1 * (b3 * d4 - b4 * d3) + a3 * (b4 * d1 - b1 * d4) + a4 * (b1 * d3 - b3 * d1));
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res.b4 = invdet * (a1 * (b3 * c4 - b4 * c3) + a3 * (b4 * c1 - b1 * c4) + a4 * (b1 * c3 - b3 * c1));
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res.c1 = invdet * (b1 * (c2 * d4 - c4 * d2) + b2 * (c4 * d1 - c1 * d4) + b4 * (c1 * d2 - c2 * d1));
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res.c2 = -invdet * (a1 * (c2 * d4 - c4 * d2) + a2 * (c4 * d1 - c1 * d4) + a4 * (c1 * d2 - c2 * d1));
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res.c3 = invdet * (a1 * (b2 * d4 - b4 * d2) + a2 * (b4 * d1 - b1 * d4) + a4 * (b1 * d2 - b2 * d1));
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res.c4 = -invdet * (a1 * (b2 * c4 - b4 * c2) + a2 * (b4 * c1 - b1 * c4) + a4 * (b1 * c2 - b2 * c1));
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res.d1 = -invdet * (b1 * (c2 * d3 - c3 * d2) + b2 * (c3 * d1 - c1 * d3) + b3 * (c1 * d2 - c2 * d1));
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res.d2 = invdet * (a1 * (c2 * d3 - c3 * d2) + a2 * (c3 * d1 - c1 * d3) + a3 * (c1 * d2 - c2 * d1));
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res.d3 = -invdet * (a1 * (b2 * d3 - b3 * d2) + a2 * (b3 * d1 - b1 * d3) + a3 * (b1 * d2 - b2 * d1));
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res.d4 = invdet * (a1 * (b2 * c3 - b3 * c2) + a2 * (b3 * c1 - b1 * c3) + a3 * (b1 * c2 - b2 * c1));
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*this = res;
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return *this;
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}
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// ---------------------------------------------------------------------------
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inline float* aiMatrix4x4::operator[](unsigned int p_iIndex)
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{
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return &this->a1 + p_iIndex * 4;
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}
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// ---------------------------------------------------------------------------
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inline const float* aiMatrix4x4::operator[](unsigned int p_iIndex) const
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{
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return &this->a1 + p_iIndex * 4;
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}
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// ---------------------------------------------------------------------------
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inline bool aiMatrix4x4::operator== (const aiMatrix4x4 m) const
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{
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return (a1 == m.a1 && a2 == m.a2 && a3 == m.a3 && a4 == m.a4 &&
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b1 == m.b1 && b2 == m.b2 && b3 == m.b3 && b4 == m.b4 &&
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c1 == m.c1 && c2 == m.c2 && c3 == m.c3 && c4 == m.c4 &&
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d1 == m.d1 && d2 == m.d2 && d3 == m.d3 && d4 == m.d4);
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}
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// ---------------------------------------------------------------------------
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inline bool aiMatrix4x4::operator!= (const aiMatrix4x4 m) const
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{
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return !(*this == m);
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}
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// ---------------------------------------------------------------------------
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inline void aiMatrix4x4::Decompose (aiVector3D& scaling, aiQuaternion& rotation,
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aiVector3D& position) const
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{
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const aiMatrix4x4& _this = *this;
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// extract translation
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position.x = _this[0][3];
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position.y = _this[1][3];
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position.z = _this[2][3];
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// extract the rows of the matrix
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aiVector3D vRows[3] = {
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aiVector3D(_this[0][0],_this[1][1],_this[2][0]),
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aiVector3D(_this[0][1],_this[1][1],_this[2][1]),
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aiVector3D(_this[0][2],_this[1][2],_this[2][2])
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};
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// extract the scaling factors
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scaling.x = vRows[0].Length();
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scaling.y = vRows[1].Length();
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scaling.z = vRows[2].Length();
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// and remove all scaling from the matrix
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if(scaling.x)
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{
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vRows[0].x /= scaling.x;
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vRows[0].y /= scaling.x;
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vRows[0].z /= scaling.x;
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}
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if(scaling.y)
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{
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vRows[1].x /= scaling.y;
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vRows[1].y /= scaling.y;
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vRows[1].z /= scaling.y;
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}
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if(scaling.z)
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{
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vRows[2].x /= scaling.z;
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vRows[2].y /= scaling.z;
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vRows[2].z /= scaling.z;
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}
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// build a 3x3 rotation matrix
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aiMatrix3x3 m(vRows[0].x,vRows[0].y,vRows[0].z,
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vRows[1].x,vRows[1].y,vRows[1].z,
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vRows[2].x,vRows[2].y,vRows[2].z);
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// and generate the rotation quaternion from it
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rotation = aiQuaternion(m);
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}
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// ---------------------------------------------------------------------------
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inline void aiMatrix4x4::DecomposeNoScaling (aiQuaternion& rotation,
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aiVector3D& position) const
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{
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const aiMatrix4x4& _this = *this;
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// extract translation
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position.x = _this[0][3];
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position.y = _this[1][3];
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position.z = _this[2][3];
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// extract rotation
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rotation = aiQuaternion((aiMatrix3x3)_this);
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}
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// ---------------------------------------------------------------------------
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inline void aiMatrix4x4::FromEulerAngles(float x, float y, float z)
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{
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aiMatrix4x4& _this = *this;
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const float A = ::cosf(x);
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const float B = ::sinf(x);
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const float C = ::cosf(y);
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const float D = ::sinf(y);
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const float E = ::cosf(z);
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const float F = ::sinf(z);
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const float AD = A * D;
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const float BD = B * D;
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_this.a1 = C * E;
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_this.a2 = -C * F;
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_this.a3 = D;
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_this.b1 = BD * E + A * F;
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_this.b2 = -BD * F + A * E;
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_this.b3 = -B * C;
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_this.c1 = -AD * E + B * F;
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_this.c2 = AD * F + B * E;
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_this.c3 = A * C;
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_this.a4 = _this.b4 = _this.c4 = _this.d1 = _this.d2 = _this.d3 = 0.0f;
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_this.d4 = 1.0f;
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}
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#endif // __cplusplus
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#endif // AI_MATRIX4x4_INL_INC
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