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47 lines
1.1 KiB
47 lines
1.1 KiB
#include "emath_opengl.h"
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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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glRotatef(rvecdeg, rvec);
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glRotatef(rvecdeg2, rvec2);
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}
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