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78 lines
1.8 KiB
78 lines
1.8 KiB
#include "emath_opengl.h"
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namespace segl {
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void rotFrom2VecTo2Vec(Punkt3D a, Punkt3D b, Punkt3D c, Punkt3D d, Punkt3D *rvec, float *rvecdeg, Punkt3D *rvec2, float *rvecdeg2) {
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Punkt3D rotvec, rotvec2, nullvec;
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float rotvecdeg = 0.0f, rotvecdeg2 = 0.0f;
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rotvec = a.kreuzprodukt(b);
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rotvecdeg = a.calcAngle(b);
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if(std::abs(rotvecdeg)==180.0f) {
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rotvec = a.getOrtographic();
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}
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if(rotvec==nullvec) {
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rotvec.set(1.0f, 0.0f, 0.0f);
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rotvecdeg = 0.0f;
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}
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Rotationsmatrix rotnobj(rotvec, -rotvecdeg);
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c = Rotationsmatrix(rotvec, rotvecdeg) * c;
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rotvec2 = c.kreuzprodukt(d);
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rotvecdeg2 = c.calcAngle(d);
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if(std::abs(rotvecdeg2)==180.0f) {
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rotvec2 = b;
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}
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if(rotvec2==nullvec) {
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rotvec2.set(1.0f, 0.0f, 0.0f);
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rotvecdeg2 = 0.0f;
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}
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rotvec2 = rotnobj * rotvec2;
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*rvec = rotvec;
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*rvecdeg = rotvecdeg;
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*rvec2 = rotvec2;
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*rvecdeg2 = rotvecdeg2;
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}
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void rotFrom2VecTo2Vec(Punkt3D a, Punkt3D b, Punkt3D c, Punkt3D d) {
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Punkt3D rvec, rvec2;
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float rvecdeg, rvecdeg2;
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rotFrom2VecTo2Vec(a, b, c, d, &rvec, &rvecdeg, &rvec2, &rvecdeg2);
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// if(rvecdeg)
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glRotatef(rvecdeg, rvec);
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// if(rvecdeg2)
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glRotatef(rvecdeg2, rvec2);
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// std::cout << rvecdeg << ", " << rvecdeg2 << std::endl;
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// rvec.print("rvecdeg");
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// rvec2.print("rvecdeg2");
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}
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void rotvec2(Punkt3D a, Punkt3D b, Punkt3D c, Punkt3D d, float *dega, Punkt3D *veca, float *degb, Punkt3D *vecb) {
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*dega = a.calcAngle(b);
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if(*dega==180.0f)
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*veca = a.getOrtographic();
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else if(*dega==0.0f)
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veca->set(1.0f, 0.0f, 0.0f);
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else
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*veca = a.kreuzprodukt(b);
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*degb = 0.0f;
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vecb->set(1.0f, 0.0f, 0.0f);
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c = Rotationsmatrix(*veca, *dega) * c;
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*degb = c.calcAngle(d);
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if(*degb==180.0f)
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*vecb = c.getOrtographic();
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else if(*degb==0.0f)
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vecb->set(1.0f, 0.0f, 0.0f);
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else
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*vecb = c.kreuzprodukt(d);
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}
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} // namespace segl
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