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Code cleaning of SvgToFlatMeshEditor

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Banane_Rotative
2025-11-15 15:22:06 +01:00
parent 69cc3542a6
commit 03b42a65e5
1 changed files with 59 additions and 83 deletions
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142
Assets/Editor/SvgToFlatMeshEditor.cs
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@@ -9,15 +9,14 @@ using UnityEngine;
using UnityEditor; using UnityEditor;
using Unity.VectorGraphics; // From com.unity.vectorgraphics using Unity.VectorGraphics; // From com.unity.vectorgraphics
public class SvgToFlatMeshEditor : EditorWindow public class SvgToFlatMeshEditor : EditorWindow
{ {
TextAsset svgFile; TextAsset svgFile;
Material editorMaterial; Material editorMaterial;
float pixelsPerUnit = 100.0f; float pixelsPerUnit = 100.0f;
Transform parentTransform; Transform parentTransform;
float meshScale = 1f; float meshScale = 1f;
VectorUtils.TessellationOptions tessOptions = new VectorUtils.TessellationOptions() VectorUtils.TessellationOptions tessOptions = new VectorUtils.TessellationOptions() {
{
StepDistance = 1.0f, StepDistance = 1.0f,
MaxCordDeviation = 0.5f, MaxCordDeviation = 0.5f,
MaxTanAngleDeviation = 0.1f, MaxTanAngleDeviation = 0.1f,
@@ -25,14 +24,12 @@ public class SvgToFlatMeshEditor : EditorWindow
}; };
[MenuItem("Tools/SVG → Flat Mesh Regions")] [MenuItem("Tools/SVG → Flat Mesh Regions")]
static void OpenWindow() static void OpenWindow() {
{
var w = GetWindow<SvgToFlatMeshEditor>("SVG → Flat Mesh"); var w = GetWindow<SvgToFlatMeshEditor>("SVG → Flat Mesh");
w.minSize = new Vector2(460, 320); w.minSize = new Vector2(460, 320);
} }
void OnGUI() void OnGUI() {
{
EditorGUILayout.LabelField("SVG → Flat Mesh (separate GameObjects per fill color)", EditorStyles.boldLabel); EditorGUILayout.LabelField("SVG → Flat Mesh (separate GameObjects per fill color)", EditorStyles.boldLabel);
EditorGUILayout.Space(); EditorGUILayout.Space();
@@ -44,27 +41,22 @@ public class SvgToFlatMeshEditor : EditorWindow
EditorGUILayout.Space(); EditorGUILayout.Space();
EditorGUILayout.LabelField("Tessellation Options", EditorStyles.boldLabel); EditorGUILayout.LabelField("Tessellation Options", EditorStyles.boldLabel);
tessOptions.StepDistance = EditorGUILayout.FloatField("Step Distance", tessOptions.StepDistance); tessOptions.StepDistance = EditorGUILayout.FloatField(new GUIContent("Step Distance", "From manual: The uniform tessellation step distance."), tessOptions.StepDistance);
tessOptions.MaxCordDeviation = EditorGUILayout.FloatField("Max Cord Deviation", tessOptions.MaxCordDeviation); tessOptions.MaxCordDeviation = EditorGUILayout.FloatField(new GUIContent("Max Cord Deviation", "From manual: The maximum distance on the cord to a straight line between to points after which more tessellation will be generated"), tessOptions.MaxCordDeviation);
tessOptions.MaxTanAngleDeviation = EditorGUILayout.FloatField("Max Tan Angle Deviation", tessOptions.MaxTanAngleDeviation); tessOptions.MaxTanAngleDeviation = EditorGUILayout.FloatField(new GUIContent("Max Tan Angle Deviation", "From manual: The maximum angle (in degrees) between the curve tangent and the next point after which more tessellation will be generated"), tessOptions.MaxTanAngleDeviation);
tessOptions.SamplingStepSize = EditorGUILayout.FloatField("Sampling Step Size", tessOptions.SamplingStepSize); tessOptions.SamplingStepSize = EditorGUILayout.FloatField(new GUIContent("Sampling Step Size", "From manual: The number of samples used internally to evaluate the curves. More samples = higher quality. Should be between 0 and 1 (inclusive)"), tessOptions.SamplingStepSize);
EditorGUILayout.Space(); EditorGUILayout.Space();
if (GUILayout.Button("Generate Meshes from SVG")) if (GUILayout.Button("Generate Meshes from SVG")) {
{ if (svgFile == null) {
if (svgFile == null)
{
EditorUtility.DisplayDialog("Error", "Please assign an SVG (.svg) TextAsset.", "OK"); EditorUtility.DisplayDialog("Error", "Please assign an SVG (.svg) TextAsset.", "OK");
} }
else else {
{ try {
try
{
GenerateMeshesFromSVG(); GenerateMeshesFromSVG();
} }
catch (Exception e) catch (Exception e) {
{
Debug.LogException(e); Debug.LogException(e);
EditorUtility.DisplayDialog("Error", "Exception: " + e.Message, "OK"); EditorUtility.DisplayDialog("Error", "Exception: " + e.Message, "OK");
} }
@@ -72,22 +64,19 @@ public class SvgToFlatMeshEditor : EditorWindow
} }
EditorGUILayout.Space(); EditorGUILayout.Space();
EditorGUILayout.HelpBox("This tool creates one GameObject per fill-color region in the SVG. Each GameObject receives a MeshRenderer + MeshFilter and, optionally, a MeshCollider. Output meshes lie flat on the XZ plane (Y = 0).", MessageType.Info); EditorGUILayout.HelpBox("This tool creates one GameObject per fill-color region in the SVG. Each GameObject receives a MeshRenderer + MeshFilter and a MeshCollider. Output meshes lie flat on the XZ plane (Y = 0).", MessageType.Info);
} }
void GenerateMeshesFromSVG() void GenerateMeshesFromSVG() {
{
// Parse SVG // Parse SVG
var svgText = svgFile.text; var svgText = svgFile.text;
if (string.IsNullOrEmpty(svgText)) if (string.IsNullOrEmpty(svgText)) {
{
EditorUtility.DisplayDialog("Error", "SVG file is empty.", "OK"); EditorUtility.DisplayDialog("Error", "SVG file is empty.", "OK");
return; return;
} }
var sceneInfo = SVGParser.ImportSVG(new StringReader(svgText)); var sceneInfo = SVGParser.ImportSVG(new StringReader(svgText));
if (sceneInfo.Equals(default(SVGParser.SceneInfo)) || sceneInfo.Scene == null) if (sceneInfo.Equals(default(SVGParser.SceneInfo)) || sceneInfo.Scene == null) {
{
EditorUtility.DisplayDialog("Error", "Failed to import SVG. Make sure the file is valid and Vector Graphics package is installed.", "OK"); EditorUtility.DisplayDialog("Error", "Failed to import SVG. Make sure the file is valid and Vector Graphics package is installed.", "OK");
return; return;
} }
@@ -99,19 +88,19 @@ public class SvgToFlatMeshEditor : EditorWindow
TraverseAndCollectShapes(sceneInfo.Scene.Root, Matrix2D.identity, shapesByColor); TraverseAndCollectShapes(sceneInfo.Scene.Root, Matrix2D.identity, shapesByColor);
if (shapesByColor.Count == 0) if (shapesByColor.Count == 0) {
{
EditorUtility.DisplayDialog("Result", "No filled shapes found in the SVG.", "OK"); EditorUtility.DisplayDialog("Result", "No filled shapes found in the SVG.", "OK");
return; return;
} }
// Create parent container // Create parent container
GameObject container = new GameObject(Path.GetFileNameWithoutExtension(svgFile.name) + "_SVG_Meshes"); GameObject container = new GameObject(Path.GetFileNameWithoutExtension(svgFile.name) + "_SVG_Meshes");
if (parentTransform != null) container.transform.SetParent(parentTransform, false); if (parentTransform != null) {
container.transform.SetParent(parentTransform, false);
}
// For each color group, tessellate shapes into geometry and build a mesh // For each color group, tessellate shapes into geometry and build a mesh
foreach (var kv in shapesByColor) foreach (var kv in shapesByColor) {
{
Color color = kv.Key; Color color = kv.Key;
List<SceneNodeShapeEntry> entries = kv.Value; List<SceneNodeShapeEntry> entries = kv.Value;
@@ -120,11 +109,9 @@ public class SvgToFlatMeshEditor : EditorWindow
tmpScene.Root = new SceneNode(); tmpScene.Root = new SceneNode();
tmpScene.Root.Children = new List<SceneNode>(); tmpScene.Root.Children = new List<SceneNode>();
foreach (var entry in entries) foreach (var entry in entries) {
{
// create a shallow copy Node with transform and the original shapes (the shape objects can be reused) // create a shallow copy Node with transform and the original shapes (the shape objects can be reused)
SceneNode copyNode = new SceneNode() SceneNode copyNode = new SceneNode() {
{
Transform = entry.Node.Transform, // keep transform Transform = entry.Node.Transform, // keep transform
Shapes = new List<Shape>() { entry.Shape } Shapes = new List<Shape>() { entry.Shape }
}; };
@@ -134,8 +121,7 @@ public class SvgToFlatMeshEditor : EditorWindow
// Tessellate the tmpScene // Tessellate the tmpScene
var geoms = VectorUtils.TessellateScene(tmpScene, tessOptions); var geoms = VectorUtils.TessellateScene(tmpScene, tessOptions);
if (geoms == null || geoms.Count == 0) if (geoms == null || geoms.Count == 0) {
{
Debug.LogWarning($"No geometry generated for color {color} (skipping)."); Debug.LogWarning($"No geometry generated for color {color} (skipping).");
continue; continue;
} }
@@ -153,15 +139,13 @@ public class SvgToFlatMeshEditor : EditorWindow
var mr = go.AddComponent<MeshRenderer>(); var mr = go.AddComponent<MeshRenderer>();
if (editorMaterial != null) if (editorMaterial != null) {
{
// instantiate a material so each region can have its own color without overwriting the original asset // instantiate a material so each region can have its own color without overwriting the original asset
Material matInstance = new Material(editorMaterial); Material matInstance = new Material(editorMaterial);
matInstance.color = color; matInstance.color = color;
mr.sharedMaterial = matInstance; mr.sharedMaterial = matInstance;
} }
else else {
{
// Create a quick default material // Create a quick default material
var mat = new Material(Shader.Find("Standard")); var mat = new Material(Shader.Find("Standard"));
mat.color = color; mat.color = color;
@@ -185,32 +169,30 @@ public class SvgToFlatMeshEditor : EditorWindow
} }
// Recursively traverse scene nodes and collect filled shapes // Recursively traverse scene nodes and collect filled shapes
void TraverseAndCollectShapes(SceneNode node, Matrix2D parentTransform, Dictionary<Color, List<SceneNodeShapeEntry>> shapesByColor) void TraverseAndCollectShapes(SceneNode node, Matrix2D parentTransform, Dictionary<Color, List<SceneNodeShapeEntry>> shapesByColor) {
{ if (node == null) {
if (node == null) return; return;
}
// Combine transforms (VectorGraphics uses Matrix2D) // Combine transforms (VectorGraphics uses Matrix2D)
Matrix2D currentTransform = parentTransform * node.Transform; Matrix2D currentTransform = parentTransform * node.Transform;
if (node.Shapes != null && node.Shapes.Count > 0) if (node.Shapes != null && node.Shapes.Count > 0) {
{ foreach (var shape in node.Shapes) {
foreach (var shape in node.Shapes) if (shape == null) {
{ continue;
if (shape == null) continue; }
// Only treat fills (SolidFill) // Only treat fills (SolidFill)
if (shape.Fill is SolidFill sf) if (shape.Fill is SolidFill sf) {
{
Color col = sf.Color; Color col = sf.Color;
// Note: color comes as linear RGBA. Convert to Unity's Color (already same type) // Note: color comes as linear RGBA. Convert to Unity's Color (already same type)
if (!shapesByColor.TryGetValue(col, out List<SceneNodeShapeEntry> list)) if (!shapesByColor.TryGetValue(col, out List<SceneNodeShapeEntry> list)) {
{
list = new List<SceneNodeShapeEntry>(); list = new List<SceneNodeShapeEntry>();
shapesByColor[col] = list; shapesByColor[col] = list;
} }
// Store the shape together with a node that carries the proper transform // Store the shape together with a node that carries the proper transform
SceneNode fakeNode = new SceneNode() SceneNode fakeNode = new SceneNode() {
{
Transform = currentTransform, Transform = currentTransform,
Shapes = new List<Shape>() { shape } Shapes = new List<Shape>() { shape }
}; };
@@ -219,28 +201,27 @@ public class SvgToFlatMeshEditor : EditorWindow
} }
} }
if (node.Children != null && node.Children.Count > 0) if (node.Children != null && node.Children.Count > 0) {
{ foreach (var c in node.Children) {
foreach (var c in node.Children)
TraverseAndCollectShapes(c, currentTransform, shapesByColor); TraverseAndCollectShapes(c, currentTransform, shapesByColor);
}
} }
} }
// Build a Mesh from VectorUtils.Geometry list // Build a Mesh from VectorUtils.Geometry list
Mesh BuildMeshFromGeometries(List<VectorUtils.Geometry> geoms, Vector2 geomsCenter, float globalScale) Mesh BuildMeshFromGeometries(List<VectorUtils.Geometry> geoms, Vector2 geomsCenter, float globalScale) {
{
var verts = new List<Vector3>(); var verts = new List<Vector3>();
var uvs = new List<Vector2>(); var uvs = new List<Vector2>();
var indices = new List<int>(); var indices = new List<int>();
int baseIndex = 0; int baseIndex = 0;
foreach (var g in geoms) foreach (var g in geoms) {
{ if (g == null || g.Vertices == null || g.Indices == null) {
if (g == null || g.Vertices == null || g.Indices == null) continue; continue;
}
// Add vertices (VectorUtils uses Vector2 for geometry XY) // Add vertices (VectorUtils uses Vector2 for geometry XY)
for (int i = 0; i < g.Vertices.Length; i++) for (int i = 0; i < g.Vertices.Length; i++) {
{
var v2 = g.Vertices[i]; var v2 = g.Vertices[i];
// Map XY -> XZ plane; Y = 0 // Map XY -> XZ plane; Y = 0
@@ -248,15 +229,16 @@ public class SvgToFlatMeshEditor : EditorWindow
verts.Add(v3); verts.Add(v3);
// UVs: If geometry provides UV, use it; otherwise use XY mapped to UV // UVs: If geometry provides UV, use it; otherwise use XY mapped to UV
if (g.UVs != null && g.UVs.Length == g.Vertices.Length) if (g.UVs != null && g.UVs.Length == g.Vertices.Length) {
uvs.Add(g.UVs[i]); uvs.Add(g.UVs[i]);
else }
else {
uvs.Add(new Vector2(v2.x, -v2.y)); uvs.Add(new Vector2(v2.x, -v2.y));
}
} }
// Add indices (triangles) // Add indices (triangles)
for (int i = 0; i < g.Indices.Length; i += 3) for (int i = 0; i < g.Indices.Length; i += 3) {
{
// VectorUtils yields triangles in clockwise winding // 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. // 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 + 1]);
@@ -282,34 +264,28 @@ public class SvgToFlatMeshEditor : EditorWindow
} }
// Helper to produce a safe string for color names // Helper to produce a safe string for color names
string ColorToName(Color c) string ColorToName(Color c) {
{
// Try to present RGBA hex // Try to present RGBA hex
Color32 cc = c; Color32 cc = c;
return $"{cc.r:X2}{cc.g:X2}{cc.b:X2}{(cc.a < 255 ? cc.a.ToString("X2") : "")}"; return $"{cc.r:X2}{cc.g:X2}{cc.b:X2}{(cc.a < 255 ? cc.a.ToString("X2") : "")}";
} }
// Small helper type to keep a shape and associated node (with transform) // Small helper type to keep a shape and associated node (with transform)
class SceneNodeShapeEntry class SceneNodeShapeEntry {
{
public SceneNode Node; public SceneNode Node;
public Shape Shape; public Shape Shape;
} }
// Simple color comparer for use as Dictionary key // Simple color comparer for use as Dictionary key
class ColorEqualityComparer : IEqualityComparer<Color> class ColorEqualityComparer : IEqualityComparer<Color> {
{ public bool Equals(Color x, Color y) {
public bool Equals(Color x, Color y)
{
// Compare with exactness; you could add tolerance if you want near-colors grouped // Compare with exactness; you could add tolerance if you want near-colors grouped
return Mathf.Approximately(x.r, y.r) && Mathf.Approximately(x.g, y.g) && return Mathf.Approximately(x.r, y.r) && Mathf.Approximately(x.g, y.g) &&
Mathf.Approximately(x.b, y.b) && Mathf.Approximately(x.a, y.a); Mathf.Approximately(x.b, y.b) && Mathf.Approximately(x.a, y.a);
} }
public int GetHashCode(Color obj) public int GetHashCode(Color obj) {
{ unchecked {
unchecked
{
int hash = 17; int hash = 17;
hash = hash * 23 + Mathf.RoundToInt(obj.r * 255f); hash = hash * 23 + Mathf.RoundToInt(obj.r * 255f);
hash = hash * 23 + Mathf.RoundToInt(obj.g * 255f); hash = hash * 23 + Mathf.RoundToInt(obj.g * 255f);