267 lines
6.8 KiB
C++
267 lines
6.8 KiB
C++
/**
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* @author Edouard DUPIN
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*
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* @copyright 2011, Edouard DUPIN, all right reserved
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*
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* @license APACHE v2.0 (see license file)
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*/
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#include <etk/types.h>
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#include <etk/math/Matrix4.h>
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#include <etk/debug.h>
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#include <math.h>
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#if 1
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void etk::Matrix4::rotate(const vec3& vect, float angleRad)
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{
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etk::Matrix4 tmpMat = etk::matRotate(vect, angleRad);
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*this *= tmpMat;
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}
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void etk::Matrix4::translate(const vec3& vect)
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{
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etk::Matrix4 tmpMat = etk::matTranslate(vect);
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*this *= tmpMat;
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}
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etk::Matrix4 etk::matFrustum(float xmin, float xmax, float ymin, float ymax, float zNear, float zFar)
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{
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etk::Matrix4 tmp;
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for(int32_t iii=0; iii<4*4 ; iii++) {
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tmp.m_mat[iii] = 0;
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}
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// 0 1 2 3
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// 4 5 6 7
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// 8 9 10 11
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// 12 13 14 15
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tmp.m_mat[0] = (2.0 * zNear) / (xmax - xmin);
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tmp.m_mat[5] = (2.0 * zNear) / (ymax - ymin);
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tmp.m_mat[10] = -(zFar + zNear) / (zFar - zNear);
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tmp.m_mat[2] = (xmax + xmin) / (xmax - xmin);
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tmp.m_mat[6] = (ymax + ymin) / (ymax - ymin);
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tmp.m_mat[14] = -1.0;
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tmp.m_mat[11] = -(2.0 * zFar * zNear) / (zFar - zNear);
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return tmp;
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}
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etk::Matrix4 etk::matPerspective(float fovx, float aspect, float zNear, float zFar)
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{
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//TK_DEBUG("drax perspective: fovx=" << fovx << "->" << aspect << " " << zNear << "->" << zFar);
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float xmax = zNear * tanf(fovx/2.0);
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float xmin = -xmax;
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float ymin = xmin / aspect;
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float ymax = xmax / aspect;
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//TK_DEBUG("drax perspective: " << xmin << "->" << xmax << " & " << ymin << "->" << ymax << " " << zNear << "->" << zFar);
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return etk::matFrustum(xmin, xmax, ymin, ymax, zNear, zFar);
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}
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etk::Matrix4 etk::matOrtho(float left, float right, float bottom, float top, float nearVal, float farVal)
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{
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etk::Matrix4 tmp;
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for(int32_t iii=0; iii<4*4 ; iii++) {
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tmp.m_mat[iii] = 0;
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}
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tmp.m_mat[0] = 2.0 / (right - left);
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tmp.m_mat[5] = 2.0 / (top - bottom);
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tmp.m_mat[10] = -2.0 / (farVal - nearVal);
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tmp.m_mat[3] = -1*(right + left) / (right - left);
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tmp.m_mat[7] = -1*(top + bottom) / (top - bottom);
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tmp.m_mat[11] = -1*(farVal + nearVal) / (farVal - nearVal);
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tmp.m_mat[15] = 1;
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return tmp;
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}
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etk::Matrix4 etk::matTranslate(vec3 vect)
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{
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etk::Matrix4 tmp;
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// set translation :
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tmp.m_mat[3] = vect.x();
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tmp.m_mat[7] = vect.y();
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tmp.m_mat[11] = vect.z();
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//TK_INFO("Translate :");
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//etk::matrix::Display(tmp);
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return tmp;
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}
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etk::Matrix4 etk::matScale(vec3 vect)
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{
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etk::Matrix4 tmp;
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tmp.scale(vect);
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/*
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// set scale :
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tmp.m_mat[0] = vect.x;
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tmp.m_mat[5] = vect.y;
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tmp.m_mat[10] = vect.z;
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*/
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//TK_INFO("Scale :");
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//etk::matrix::Display(tmp);
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return tmp;
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}
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etk::Matrix4 etk::matRotate(vec3 vect, float angleRad)
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{
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etk::Matrix4 tmp;
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float cosVal = cos(angleRad);
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float sinVal = sin(angleRad);
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float invVal = 1.0-cosVal;
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// set rotation :
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tmp.m_mat[0] = vect.x() * vect.x() * invVal + cosVal;
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tmp.m_mat[1] = vect.x() * vect.y() * invVal - vect.z() * sinVal;
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tmp.m_mat[2] = vect.x() * vect.z() * invVal + vect.y() * sinVal;
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tmp.m_mat[4] = vect.y() * vect.x() * invVal + vect.z() * sinVal;
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tmp.m_mat[5] = vect.y() * vect.y() * invVal + cosVal;
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tmp.m_mat[6] = vect.y() * vect.z() * invVal - vect.x() * sinVal;
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tmp.m_mat[8] = vect.z() * vect.x() * invVal - vect.y() * sinVal;
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tmp.m_mat[9] = vect.z() * vect.y() * invVal + vect.x() * sinVal;
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tmp.m_mat[10] = vect.z() * vect.z() * invVal + cosVal;
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return tmp;
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}
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etk::Matrix4 etk::matRotate2(vec3 vect)
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{
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return matLookAt(vect, vec3(0,0,0), vec3(0,1,0));
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}
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etk::Matrix4 etk::matLookAt(const vec3& _eye,
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const vec3& _target,
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const vec3& _up)
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{
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etk::Matrix4 tmp;
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vec3 forward = _eye;
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forward -= _target;
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forward.safeNormalize();
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vec3 xaxis = _target.cross(_up.normalized());
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xaxis.safeNormalize();
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vec3 up2 = xaxis.cross(forward);
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xaxis.safeNormalize();
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tmp.m_mat[0] = xaxis.x();
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tmp.m_mat[1] = up2.x();
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tmp.m_mat[2] = forward.x();
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tmp.m_mat[3] = _eye.x();
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tmp.m_mat[4] = xaxis.y();
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tmp.m_mat[5] = up2.y();
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tmp.m_mat[6] = forward.y();
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tmp.m_mat[7] = _eye.y();
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tmp.m_mat[8] = xaxis.z();
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tmp.m_mat[9] = up2.z();
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tmp.m_mat[10] = forward.z();
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tmp.m_mat[11] = _eye.z();
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tmp.m_mat[12] = 0.0f;
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tmp.m_mat[13] = 0.0f;
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tmp.m_mat[14] = 0.0f;
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tmp.m_mat[15] = 1.0f;
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return tmp;
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}
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float etk::Matrix4::coFactor(int32_t row, int32_t col) const
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{
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return ( ( m_mat[((row+1)&3)*4 + ((col+1)&3)] * m_mat[((row+2)&3)*4 + ((col+2)&3)] * m_mat[((row+3)&3)*4 + ((col+3)&3)]
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+ m_mat[((row+1)&3)*4 + ((col+2)&3)] * m_mat[((row+2)&3)*4 + ((col+3)&3)] * m_mat[((row+3)&3)*4 + ((col+1)&3)]
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+ m_mat[((row+1)&3)*4 + ((col+3)&3)] * m_mat[((row+2)&3)*4 + ((col+1)&3)] * m_mat[((row+3)&3)*4 + ((col+2)&3)] )
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- ( m_mat[((row+3)&3)*4 + ((col+1)&3)] * m_mat[((row+2)&3)*4 + ((col+2)&3)] * m_mat[((row+1)&3)*4 + ((col+3)&3)]
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+ m_mat[((row+3)&3)*4 + ((col+2)&3)] * m_mat[((row+2)&3)*4 + ((col+3)&3)] * m_mat[((row+1)&3)*4 + ((col+1)&3)]
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+ m_mat[((row+3)&3)*4 + ((col+3)&3)] * m_mat[((row+2)&3)*4 + ((col+1)&3)] * m_mat[((row+1)&3)*4 + ((col+2)&3)] )
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) * ((row + col) & 1 ? -1.0f : +1.0f);
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}
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float etk::Matrix4::determinant() const
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{
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return m_mat[0] * coFactor(0, 0) +
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m_mat[1] * coFactor(0, 1) +
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m_mat[2] * coFactor(0, 2) +
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m_mat[3] * coFactor(0, 3);
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}
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etk::Matrix4 etk::Matrix4::invert()
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{
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float det = determinant();
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if(fabsf(det) < (1.0e-7f)) {
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// The matrix is not invertible! Singular case!
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return *this;
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}
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etk::Matrix4 temp;
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float iDet = 1.0f / det;
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temp.m_mat[0] = coFactor(0,0) * iDet;
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temp.m_mat[1] = coFactor(0,1) * iDet;
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temp.m_mat[2] = coFactor(0,2) * iDet;
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temp.m_mat[3] = coFactor(0,3) * iDet;
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temp.m_mat[4] = coFactor(1,0) * iDet;
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temp.m_mat[5] = coFactor(1,1) * iDet;
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temp.m_mat[6] = coFactor(1,2) * iDet;
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temp.m_mat[7] = coFactor(1,3) * iDet;
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temp.m_mat[8] = coFactor(2,0) * iDet;
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temp.m_mat[9] = coFactor(2,1) * iDet;
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temp.m_mat[10] = coFactor(2,2) * iDet;
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temp.m_mat[11] = coFactor(2,3) * iDet;
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temp.m_mat[12] = coFactor(3,0) * iDet;
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temp.m_mat[13] = coFactor(3,1) * iDet;
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temp.m_mat[14] = coFactor(3,2) * iDet;
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temp.m_mat[15] = coFactor(3,3) * iDet;
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return temp;
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}
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std::ostream& etk::operator <<(std::ostream& _os, const etk::Matrix4& _obj) {
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_os << "matrix4 : (";
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for (int32_t iii=0; iii<16; iii++) {
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_os << _obj.m_mat[iii];
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_os << ",";
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}
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return _os;
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}
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#else
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std::ostream& operator <<(std::ostream& _os, const mat4& _obj) {
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_os << "matrix4 : ({";
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for (int32_t iii=0; iii<4; iii++) {
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if (iii!= 0) {
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_os << "},{";
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}
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for (int32_t jjj=0; jjj<4; jjj++) {
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if (jjj!= 0) {
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_os << ",";
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}
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_os << _obj.getElem(jjj,iii);
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}
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}
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_os << "})";
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return _os;
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}
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mat4 etk::matTranslate(const vec3& _vect) {
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mat4 tmp;
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tmp.translation(_vect);
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return tmp;
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}
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mat4 etk::matScale(const vec3& _vect) {
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mat4 tmp;
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tmp.scale(_vect);
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return tmp;
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}
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mat4 etk::matRotate(const vec3& _vect, float _angleRad) {
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mat4 tmp;
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tmp.rotation(_angleRad, _vect);
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return tmp;
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}
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#endif
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