Why is this happening? Trigonometric functions generally expect units in radians, while 90 is in degrees. This also applies for other functions such as cosine and tangent, not just the sine function. Most programming languages require trigonometric functions to provide their arguments in radians. This simplifies many things, especially on the implementation side as code … Read more
This is more a math problem than a Swift problem: let sinus = sin(90.0 * Double.pi / 180) print(“Sinus \(sinus)”) let cosinus = cos(90 * Double.pi / 180) print(“Cosinus \(cosinus)”) let tangent = tan(90 * Double.pi / 180) print(“Tangent \(tangent)”) prints Sinus 1.0 Cosinus 6.12323399573677e-17 Tangent 1.63312393531954e+16 Sinus of 90 degrees is 1 (correct) Cosinus … Read more
you could add the following: public float getAngle(Point target) { float angle = (float) Math.toDegrees(Math.atan2(target.y – y, target.x – x)); if(angle < 0){ angle += 360; } return angle; } by the way, why do you want to not use a double here?
The following rotate function performs a rotation of the point point by the angle angle (counterclockwise, in radians) around origin, in the Cartesian plane, with the usual axis conventions: x increasing from left to right, y increasing vertically upwards. All points are represented as length-2 tuples of the form (x_coord, y_coord). import math def rotate(origin, … Read more
Because normal people are more used to calculating degrees — OpenGL is meant to be used simple. Note that all the functions that operate on degrees are “high level” functions. For OpenGL itself, it’s no difference whether it receives radians or degrees — they are internally converted to transformation matrices anyway, so there’s no computational … Read more