Optimization of virtual fabric draping effect based on VStitcher
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摘要: 为优化基于VStitcher的虚拟织物的悬垂效果，选取38款织物进行悬垂实验，并对虚拟与真实织物的8项悬垂指标进行差异性分析。通过调整织物物理属性，使虚拟织物与真实织物悬垂效果趋于一致，并利用最小二乘法对调整前后的物理属性进行拟合，从而建立虚拟织物物理属性优化模型。随机选取3款织物进行测试，结果表明，优化后的虚拟织物与真实织物的悬垂指标相对误差均在5%以内，验证了该模型的有效性。Abstract: To optimize the virtual fabric drape effect in VStitcher, drape experiments on 38 selected fabric samples were conducted. A comparative analysis was performed by measuring 8 drape indicators for both virtual and physical fabrics to quantify their discrepancies. Subsequently, the physical properties of the virtual fabrics were systematically adjusted to align their drape behavior with that of their real-world counterparts. Using the least squares, a fitting analysis was conducted on the physical properties before and after adjustment, leading to the establishment of an optimization model for virtual fabric physical properties. To validate the model, three additional fabric samples were randomly selected for testing. The results demonstrate that the relative error between the drape indicators of the optimized virtual fabrics and the physical fabrics is within 5%. This confirms the effectiveness and accuracy of the proposed model in enhancing the realism of virtual fabric drape simulation.
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Key words:
- virtual fabrics /
- drape /
- the least squares /
- fitting optimization
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表 1 优化前虚拟织物物理属性
Table 1. Virtual fabric physical properties before optimization
序号 质量/g x1/mm x2/(N·cm−1) x3/(N·cm−1) x4/(N·cm−1) x2/(N·cm−1) x6/ % x7/ % x8/(N·cm−1) x9/ % #5 337 1.55 239.79 59.73 217.34 43.05 78.83 107.92 42.10 167.86 #14 501 2.31 1024.46 129.23 518.32 11.46 45.82 84.06 54.74 48.63 #26 841 5.56 1 797.11 901.56 148.25 9.71 284.60 0 44.30 0 
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表 2 优化后虚拟织物物理属性
Table 2. Virtual fabric physical properties after optimization
序号 质量/g x1/mm x2/(N·cm−1) x3/(N·cm−1) x4/(N·cm−1) x5/(N·cm−1) x6/ % x7/ % x8/(N·cm−1) x9/ % #5 337 1.3 153.88 51.75 197.23 42.20 79.22 108.00 89.70 157.90 #14 501 2.3 1007.30 1103.20 51.78 207.58 48.56 88.20 290.70 48.00 #26 841 5.5 1999.60 154.40 1549.69 20.12 253.76 9.87 46.50 0
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表 3 物理属性优化前后悬垂图像对比
Table 3. Comparison of drape images before and after physical property optimization
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表 4 优化前后虚实织物悬垂指标相对误差
Table 4. Relative error of drape index of virtual and real fabrics before and after optimization
单位：% 序号 处理过程 D N CU CAU MaxWC MinWC MaxCA MinCA #5 优化前 22.32 14.29 63.04 13.08 4.79 26.12 19.75 6.67 优化后 2.30 0.00 4.90 2.24 1.68 1.71 1.81 3.88 #14 优化前 6.86 50.00 172.65 85.03 2.30 11.58 22.90 48.25 优化后 2.22 0.00 2.47 2.54 1.87 5.31 2.13 3.17 #26 优化前 19.70 40.00 4.66 144.57 0.52 1.67 10.37 45.53 优化后 1.74 0.00 1.76 2.10 2.84 0.86 9.55 7.90 平均相对误差 优化前 16.29 34.76 80.12 80.89 2.54 13.12 17.67 33.48 优化后 2.09 0.00 3.04 2.29 2.13 2.63 4.50 4.98
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