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Representative implementations of devices and techniques provide a tool bar comprising a structure having a plurality of sections arranged in geometric forms. The geometric forms may change shape to keep a tool that is attached to the structure in a desired position while the tool bar is being used

Representative implementations of devices and techniques provide a tool bar comprising a structure having a plurality of sections arranged in geometric forms. The geometric forms may change shape to keep a tool that is attached to the structure in a desired position while the tool bar is being used on uneven terrain, such as on a hillside or while the tool bar is rotated or pivoted at an angle with respect to the direction of travel. Changing the shape of the geometric forms can also result in rotating the tool attached to the structure with respect to the tool bar.

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1. An apparatus, comprising: a plurality of rigid sections moveably coupled together to form a lattice-like structure comprising an open framework comprised of a regular pattern of variable-angle polygons, the rigid sections arranged to form a plurality of geometric shapes within the lattice-like st

1. An apparatus, comprising: a plurality of rigid sections moveably coupled together to form a lattice-like structure comprising an open framework comprised of a regular pattern of variable-angle polygons, the rigid sections arranged to form a plurality of geometric shapes within the lattice-like structure;an actuator pivotally coupled to a rigid section at each end of the actuator and arranged to change one or more angular dimensions of vertices of the geometric shapes by extending or retracting a rod of the actuator; anda tool coupled to at least one of the rigid sections, the tool being aligned in a vertical position while the structure is angled at an incline or a decline from horizontal. 2. The apparatus of claim 1, further comprising a yoke and a tongue, the structure being pivotally coupled to the yoke and the yoke being coupled to the tongue, the structure, the yoke, and the tongue forming at least a portion of an agricultural implement. 3. The apparatus of claim 2, further comprising another actuator coupled to the structure at a first end of the other actuator and coupled to the tongue of the implement at a second end of the other actuator and arranged to pivot the structure toward the tongue or away from the tongue. 4. The apparatus of claim 1, further comprising a control component arranged to automatically activate the actuator to change the one or more angular dimensions of vertices of the geometric shapes, aligning the tool in a vertical direction when the structure is angled at an incline or a decline from horizontal. 5. The apparatus of claim 1, wherein the geometric shapes comprise parallelograms and wherein the tool is coupled to a vertically arranged side of one of the parallelograms. 6. The apparatus of claim 1, wherein the actuator is arranged to dynamically maintain an alignment of the tool in the vertical position while an angle of the structure varies with respect to horizontal. 7. The apparatus of claim 1, wherein the apparatus comprises a portion of an agricultural implement and wherein the actuator is arranged to dynamically maintain an alignment of the tool in the vertical position while the agricultural implement traverses sloped or uneven terrain. 8. The apparatus of claim 1, wherein the tool comprises a seed planting tool or a furrow digging tool. 9. An apparatus, comprising: a plurality of rigid sections moveably coupled together to form a lattice-like structure comprising an open framework comprised of a regular pattern of variable-angle parallelograms, the rigid sections arranged to form a plurality of geometric shapes within the lattice-like structure;an actuator pivotally coupled to a rigid section at each end of the actuator and arranged to change one or more angular dimensions of vertices of the geometric shapes by extending or retracting a rod of the actuator;a tongue coupled to the structure via a yoke, the yoke being coupled to the tongue and the structure being pivotally coupled to the yoke;another actuator coupled to the structure at a first end of the other actuator and coupled to the tongue at a second end of the other actuator and arranged to pivot the structure at the yoke so that one end of the structure leads another end of the structure when the apparatus is pulled by the tongue; anda tool coupled to at least one of the rigid sections, the tool being aligned in a direction parallel to a centerline of the tongue while the structure is pivoted at an angle that is greater than or less than perpendicular to the centerline of the tongue. 10. The apparatus of claim 9, wherein the tool is aligned in a vertical position while the structure is angled at an incline or a decline from horizontal. 11. The apparatus of claim 10, further comprising a control component arranged to automatically activate the actuator to change the one or more angular dimensions of vertices of the geometric shapes, aligning the tool in a direction parallel to the centerline of the tongue while the structure is pivoted at an angle that is greater than or less than perpendicular to the centerline of the tongue, and aligning the tool in a vertical direction when the structure is angled at an incline or a decline from horizontal. 12. The apparatus of claim 9, wherein the actuator is arranged to dynamically maintain an alignment of the tool in a vertical position and to align the tool in a direction parallel to the centerline of the tongue while the structure is pivoted at an angle that is greater than or less than perpendicular to the centerline of the tongue and while an angle of the structure varies with respect to horizontal. 13. The apparatus of claim 9, wherein the apparatus comprises a portion of an agricultural implement and wherein the actuator is arranged to dynamically maintain an alignment of the tool in a vertical position and to align the tool in a direction parallel to the centerline of the tongue while the structure is pivoted at an angle that is greater than or less than perpendicular to the centerline of the tongue and while the agricultural implement traverses sloped or uneven terrain. 14. The apparatus of claim 9, wherein the tool comprises a seed planting tool or a furrow digging tool. 15. A method, comprising: moveably coupling a plurality of rigid sections to form a lattice-like structure comprising an open framework comprised of a regular pattern of variable-angle parallelograms, the rigid sections within the lattice-like structure forming a plurality of geometric shapes;pivotally coupling each end of an actuator to a rigid section;extending or retracting a rod of the actuator to change one or more angular dimensions of vertices of the geometric shapes;coupling a tool to at least one of the rigid sections; andaligning the tool in a preset spatial orientation via the extending or retracting of the rod of the actuator in response to a change to a roll orientation and/or a yaw orientation of the structure. 16. The method of claim 15, further comprising aligning the tool in a vertical position while the structure is angled at an incline or a decline from horizontal. 17. The method of claim 15, further comprising pivotally coupling the structure to a yoke, coupling the yoke to a tongue, and forming at least a portion of an agricultural implement with the structure, the yoke, and the tongue. 18. The method of claim 17, further comprising: coupling a first end of another actuator to the structure;coupling a second end of the other actuator to the tongue;extending or retracting a rod of the other actuator to pivot the structure with respect to a centerline of the tongue, so that one end of the structure leads another end of the structure when the agricultural implement is pulled by the tongue; andaligning the tool in a direction parallel to the centerline of the tongue while the structure is pivoted at an angle that is greater than or less than perpendicular to the centerline of the tongue. 19. The method of claim 18, further comprising automatically adjusting or maintaining a row spacing of the agricultural implement by extending or retracting the rod of the other actuator to pivot the structure with respect to the centerline of the tongue. 20. The method of claim 17, further comprising automatically extending or retracting the rod of the actuator to change one or more angular dimensions of vertices of the geometric shapes in response to one or more control signals generated by a control system based on one or more sensor signals received at the control system from one or more sensors located on the agricultural implement.