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companje/orientateOnSphere.pde

Last active March 3, 2020 08:43
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orientateOnSphere
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orientateOnSphere.pde
void orientateOnSphere(PVector p) { // p doesn't have to be normalized
rotate(new Quaternion().fromVectors(new PVector(0, 0, 1), p));
translate(0, 0, p.mag());
float a = -(atan2(screen().y-screen(0, 100, 0).y, screen().x-screen(0, 100, 0).x) + HALF_PI); //angle van loodrechte vector
float b = atan2(-(screen().y-p.mag()), -(screen().x-p.mag())) + HALF_PI; //angle tov screen center
rotateZ(a + b);
}
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