How would I calculate a direction vector from pitch and yaw? | Mathematics | Page 1

light jasper May 10, 2024, 5:51 AM

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How would I calculate a direction vector from pitch and yaw? Does it matter what coordinate system (right / left) i am in?

torn shuttleBOT May 10, 2024, 5:51 AM

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light jasper May 10, 2024, 5:57 AM

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direction[0] = cos(yaw) * cos(pitch);
direction[1] = sin(pitch);
direction[2] = sin(yaw) * cos(pitch);
direction[3] = 0;

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This vaguely makes sense to me. to get the x component we take the cosine of yaw. The reason why we multiply by cosine of pitch well if i look directly up and turn i still look at the same point in space, but beyond this i do not know.

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if coordinate systems do matter then i think i subtract pi / 2 from the yaw

random bronze May 10, 2024, 6:18 AM

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light jasper How would I calculate a direction vector from pitch and yaw? Does it matter wha...

Seems like you're using a spherical coordinate system, for which those equations seem ok to me.

Check a few reference points as sanity checks (yew = pitch = 0, yaw = 0 pitch = pi/4, etc.). This should sort out coordinate system issues (you may have to shift by pi/2 and/or negate).

light jasper May 10, 2024, 6:23 AM

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thanks for responding. Yeah i have tried subtracting yaw by pi / 2 and negating it. Someone said they are using left handed in their game so im taking a look in their code

light jasper May 10, 2024, 6:40 AM

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my problem was that i didnt know cross product was anti communative

light jasper May 10, 2024, 6:55 AM

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.close

torn shuttleBOT May 10, 2024, 6:55 AM

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Solved

Post marked as solved by @brisk mist.

Use .unsolved if this was a mistake.

#How would I calculate a direction vector from pitch and yaw?