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Fix: mirrored and off-center mesh

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This commit is contained in:
Banane_Rotative
2025-11-15 15:02:02 +01:00
parent 48377d9dc0
commit 69cc3542a6
1 changed files with 10 additions and 6 deletions
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16
Assets/Editor/SvgToFlatMeshEditor.cs
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@@ -92,6 +92,8 @@ public class SvgToFlatMeshEditor : EditorWindow
return;
}
Vector2 sceneCenter = VectorUtils.SceneNodeBounds(sceneInfo.Scene.Root).center;
// Gather shapes by fill color. We'll traverse the scene tree.
var shapesByColor = new Dictionary<Color, List<SceneNodeShapeEntry>>(new ColorEqualityComparer());
@@ -139,7 +141,7 @@ public class SvgToFlatMeshEditor : EditorWindow
}
// Build Mesh from geoms
Mesh mesh = BuildMeshFromGeometries(geoms, meshScale);
Mesh mesh = BuildMeshFromGeometries(geoms, sceneCenter, meshScale);
// Create GameObject for this color region
string colorName = ColorToName(color);
@@ -225,7 +227,7 @@ public class SvgToFlatMeshEditor : EditorWindow
}
// Build a Mesh from VectorUtils.Geometry list
Mesh BuildMeshFromGeometries(List<VectorUtils.Geometry> geoms, float globalScale)
Mesh BuildMeshFromGeometries(List<VectorUtils.Geometry> geoms, Vector2 geomsCenter, float globalScale)
{
var verts = new List<Vector3>();
var uvs = new List<Vector2>();
@@ -240,23 +242,25 @@ public class SvgToFlatMeshEditor : EditorWindow
for (int i = 0; i < g.Vertices.Length; i++)
{
var v2 = g.Vertices[i];
// Map XY -> XZ plane; Y = 0
Vector3 v3 = new Vector3(v2.x, 0f, v2.y) * globalScale;
Vector3 v3 = new Vector3(v2.x-geomsCenter.x, 0f, -v2.y+geomsCenter.y) * globalScale;
verts.Add(v3);
// UVs: If geometry provides UV, use it; otherwise use XY mapped to UV
if (g.UVs != null && g.UVs.Length == g.Vertices.Length)
uvs.Add(g.UVs[i]);
else
uvs.Add(new Vector2(v2.x, v2.y));
uvs.Add(new Vector2(v2.x, -v2.y));
}
// Add indices (triangles)
for (int i = 0; i < g.Indices.Length; i += 3)
{
// VectorUtils yields triangles in clockwise winding; Unity expects clockwise for front? We'll keep it.
indices.Add(baseIndex + g.Indices[i]);
// VectorUtils yields triangles in clockwise winding
// Unity is supposed to use clockwise as well, but in practice we find we need to flip the order to get correct facing.
indices.Add(baseIndex + g.Indices[i + 1]);
indices.Add(baseIndex + g.Indices[i]);
indices.Add(baseIndex + g.Indices[i + 2]);
}