Java Community | Help. Code. Learn.•2w ago

Removing roll from camera matrix

I have a camera class which is just this:

import org.joml.*;

public class Camera {
    public Matrix4f viewMatrix = new Matrix4f().setTranslation(new Vector3f(100, 200, 100));

    public void rotate(float x, float y) {
        viewMatrix.rotateXYZ(x, y, 0);
    }
    public void move(float x, float y, float z) {
        viewMatrix.translate(x, y, z);
    }
}

import org.joml.*;

public class Camera {
    public Matrix4f viewMatrix = new Matrix4f().setTranslation(new Vector3f(100, 200, 100));

    public void rotate(float x, float y) {
        viewMatrix.rotateXYZ(x, y, 0);
    }
    public void move(float x, float y, float z) {
        viewMatrix.translate(x, y, z);
    }
}

and it works, but I want to eliminate the roll from the matrix somehow.

14 Replies

JavaBot•2w ago

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𝓐pothiconOP•2w ago

(roll as in the tilting of the camera from left to right as shown here)

JavaBot•2w ago

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𝓐pothiconOP•2w ago

. /reopen

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𝓐pothiconOP•2w ago

open seasame

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Noah | Nowipi•2w ago

Then don't rotate it Does the default constructor of Matrix4f return an identity matrix?

𝓐pothiconOP•2w ago

Yes (but not sure why that matters) but i need to rotate the matrix so that i can well.. rotate the camera around, just need to somehow eliminate the roll aspect immediately afterwards

Noah | Nowipi•2w ago

I don't understand Just don't rotate on the roll axis

𝓐pothiconOP•2w ago

what do you do to not rotate on the roll axis tho ive tried everything i can think of

viewMatrix.rotateXYZ(x, y, 0);

viewMatrix.rotateXYZ(x, y, 0);

its not like their seperate numbers im getting three axis of rotation just by rotating x and y

JavaBot•2w ago

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𝓐pothiconOP•2w ago

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Removing roll from camera matrix