Fix vertices with different texture coordinates in imported models getting collapsed#6923
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Resolves #6921
Changes
Previously, when importing models, p5.Geometry vertices were being reused whenever a vertex position + material gets reused in the OBJ code. However, vertex position + color alone are not all that's included in p5.Geometry vertices: it also includes texture position and normals. By not accounting for this, some vertex texture coordinates were being collapsed, leading to interpolation of textures and normals where there should be a seam.
Screenshots of the change
https://editor.p5js.org/davepagurek/sketches/Y1ui2XK_n
PR Checklist
npm run lintpasses