LWJGL: Rotation affects more than it should (Matrix is pushed)

Newbie & Debugging Questions
#1

Hi everyone!

I have a problem with rotating models that I can’t solve on my own and I hope you can help me.

I am planning to rotate a moving model so that it points into the direction it is moving to.
I started with the movement into the direction without rotating the model which worked well.
Then I added the possibility to rotate the model into the rendering function and the model is rotating the way it should.
But: When I rotate the model the movement direction is changed back to 0. Since I push the matrix just for the rotation I don’t understand why it is affecting the movement direction of the model.
When I remove the rotation line the movement direction is back to the way it should be.

Here is my rendering function:

public void render(float x, float y, float z, float rY, float scale, Texture t)
	{
		if(t != null)
			t.bind();
		else
			glBindTexture(GL_TEXTURE_2D, 0);
		glPushMatrix();
		
		//This line!
		glRotatef((float)Math.toDegrees(rY), 0, 1, 0);         
		
		glBegin(GL_TRIANGLES);
		
		
		for(Face f:faces)
		{
			Vector3f v1 = verts.get((int) f.verts.x - 1);
			Vector3f n1 = norms.get((int) f.norms.x - 1);
			Vector3f v2 = verts.get((int) f.verts.y - 1);
			Vector3f n2 = norms.get((int) f.norms.y - 1);
			Vector3f v3 = verts.get((int) f.verts.z - 1);
			Vector3f n3 = norms.get((int) f.norms.z - 1);
			glTexCoord2f(0f, 0f);
			glNormal3f(scale * n1.x + x, scale * n1.y + y, scale * n1.z + z);
			glVertex3f(scale * v1.x + x, scale * v1.y + y, scale * v1.z + z);
			glTexCoord2f(1.0f, 0f);
			glNormal3f(scale * n2.x + x, scale * n2.y + y, scale * n2.z + z);
			glVertex3f(scale * v2.x + x, scale * v2.y + y, scale * v2.z + z);
			glTexCoord2f(0.5f, 1.0f);
			glNormal3f(scale * n3.x + x, scale * n3.y + y, scale * n3.z + z);
			glVertex3f(scale * v3.x + x, scale * v3.y + y, scale * v3.z + z);
		}
		
		glEnd();
		glPopMatrix();


	}

Here is the movement:

public void moveBy(float amt)
	{
		this.setPosX(this.getPosX() + amt * (float)Math.cos(Math.toRadians(hasDirection)));
		this.setPosY(this.getPosY() + amt * (float)Math.sin(Math.toRadians(hasDirection)));
	}

I hope you can help me and thank you in advance.

Regards
Smire