Method makeRotate

shared/java/Matrix33.java:153–166

Creates a Matrix33 to rotate by |deg| about a pivot point at (0, 0). @param deg rotation angle in degrees (positive rotates clockwise) @return Matrix33 with rotation

(float deg)

     * @return     Matrix33 with rotation
     */
    @NotNull
    public static Matrix33 makeRotate(float deg) {
        double rad = Math.toRadians(deg);
        double sin = Math.sin(rad);
        double cos = Math.cos(rad);
        double tolerance = 1f / (1 << 12);
        if (Math.abs(sin) <= tolerance) sin = 0;
        if (Math.abs(cos) <= tolerance) cos = 0;
        return new Matrix33(new float[] {
            (float) cos, (float) -sin, 0,
            (float) sin, (float) cos, 0,
            0, 0, 1
        });
    }

    /**
     * Creates a Matrix33 to rotate by |deg| about a pivot point at pivot.