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23 lines
736 B
C++
23 lines
736 B
C++
#pragma once
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// Copyright (c) 2024-2026 Tarik Moussa.
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// SPDX-License-Identifier: MIT
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// 4x4 mapping matrix from corresponding point pairs.
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// Ported from de.varylab.discreteconformal.math.MatrixUtility (Java).
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#include <Eigen/Dense>
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namespace conformallab {
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/// Find the 4×4 matrix `R` that maps each row of `from` (homogeneous
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/// 4-vector) to the corresponding row of `to`: `R · fromᵀ = toᵀ`.
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/// Computed as `R = toᵀ · (fromᵀ)⁻¹`. Same as Java
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/// `MatrixUtility.makeMappingMatrix()`.
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inline Eigen::Matrix4d makeMappingMatrix(const Eigen::Matrix4d& from,
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const Eigen::Matrix4d& to) {
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return to.transpose() * from.transpose().inverse();
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}
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} // namespace conformallab
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