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using UnityEngine;
using System.Collections.Generic;
using System.Linq;
public class DecodeVertexVectors : MonoBehaviour
{
[Header("Display Settings")]
[SerializeField] private int maxVertices = 100;
[SerializeField] private float vectorScale = 0.3f;
[Header("Edge Visualization")]
[SerializeField] private bool showEdges = true;
[SerializeField] private int edgeSubdivisions = 2;
[Header("Orientation")]
[SerializeField] private bool showOrientations = true;
[SerializeField] private float orientationScale = 1.0f;
[Header("UV Channels")]
[SerializeField] private int quaternionXYChannel = 1;
[SerializeField] private int quaternionZWChannel = 2;
[Header("Colors")]
[SerializeField] private Color vectorColor = new Color(0.5f, 0.8f, 1f);
[SerializeField] private Color correctedVectorColor = new Color(1f, 0.5f, 0.2f);
[SerializeField] private Color forwardColor = Color.blue;
private void OnDrawGizmos()
{
var meshFilter = GetComponent<MeshFilter>();
if (!meshFilter || !meshFilter.sharedMesh) return;
var mesh = meshFilter.sharedMesh;
var vertices = mesh.vertices;
var colors = mesh.colors;
// Draw vertex vectors from colors
if (colors != null && colors.Length > 0)
{
DrawVertexVectors(mesh, vertices, colors);
}
// Draw orientations from UVs
if (showOrientations)
{
DrawOrientations(mesh, vertices);
}
}
void DrawVertexVectors(Mesh mesh, Vector3[] vertices, Color[] colors)
{
Vector2[] uvXY = GetUVData(mesh, quaternionXYChannel);
Vector2[] uvZW = GetUVData(mesh, quaternionZWChannel);
bool hasQuaternions = uvXY != null && uvZW != null;
int vertexStep = Mathf.Max(1, vertices.Length / maxVertices);
// Draw vectors at vertices
for (int i = 0; i < vertices.Length; i += vertexStep)
{
if (i >= colors.Length) break;
Vector3 worldPos = transform.TransformPoint(vertices[i]);
Vector3 decodedVector = DecodeVectorFromColor(colors[i]);
// Basic vector
Gizmos.color = vectorColor;
DrawVector(worldPos, transform.TransformDirection(decodedVector), vectorScale);
// Quaternion-corrected vector
if (hasQuaternions && i < uvXY.Length && i < uvZW.Length)
{
Quaternion quat = GetQuaternionFromUV(uvXY[i], uvZW[i]);
Vector3 corrected = quat * decodedVector;
Gizmos.color = correctedVectorColor;
DrawVector(worldPos, transform.TransformDirection(corrected), vectorScale);
}
}
// Draw edge interpolations
if (showEdges && edgeSubdivisions > 0)
{
DrawEdgeInterpolations(mesh, vertices, colors, uvXY, uvZW);
}
}
void DrawEdgeInterpolations(Mesh mesh, Vector3[] vertices, Color[] colors, Vector2[] uvXY, Vector2[] uvZW)
{
var triangles = mesh.triangles;
HashSet<(int, int)> drawnEdges = new HashSet<(int, int)>();
bool hasQuaternions = uvXY != null && uvZW != null;
for (int i = 0; i < triangles.Length && drawnEdges.Count < maxVertices/2; i += 3)
{
for (int j = 0; j < 3; j++)
{
int v1 = triangles[i + j];
int v2 = triangles[i + ((j + 1) % 3)];
var edge = v1 < v2 ? (v1, v2) : (v2, v1);
if (!drawnEdges.Add(edge)) continue;
if (v1 >= vertices.Length || v2 >= vertices.Length ||
v1 >= colors.Length || v2 >= colors.Length) continue;
// Draw subdivisions along edge
for (int k = 1; k < edgeSubdivisions; k++)
{
float t = k / (float)edgeSubdivisions;
Vector3 pos = Vector3.Lerp(vertices[v1], vertices[v2], t);
Color col = Color.Lerp(colors[v1], colors[v2], t);
Vector3 worldPos = transform.TransformPoint(pos);
Vector3 vec = DecodeVectorFromColor(col);
// Basic vector
Gizmos.color = vectorColor * 0.7f; // Slightly dimmer for edge points
DrawVector(worldPos, transform.TransformDirection(vec), vectorScale * 0.8f);
// Quaternion-corrected vector
if (hasQuaternions && v1 < uvXY.Length && v2 < uvXY.Length &&
v1 < uvZW.Length && v2 < uvZW.Length)
{
Vector2 interpXY = Vector2.Lerp(uvXY[v1], uvXY[v2], t);
Vector2 interpZW = Vector2.Lerp(uvZW[v1], uvZW[v2], t);
Quaternion interpQuat = GetQuaternionFromUV(interpXY, interpZW);
Vector3 corrected = interpQuat * vec;
Gizmos.color = correctedVectorColor * 0.7f; // Slightly dimmer for edge points
DrawVector(worldPos, transform.TransformDirection(corrected), vectorScale * 0.8f);
}
}
}
}
}
void DrawOrientations(Mesh mesh, Vector3[] vertices)
{
Vector2[] uvXY = GetUVData(mesh, quaternionXYChannel);
Vector2[] uvZW = GetUVData(mesh, quaternionZWChannel);
if (uvXY == null || uvZW == null) return;
int vertexStep = Mathf.Max(1, vertices.Length / maxVertices);
for (int i = 0; i < vertices.Length; i += vertexStep)
{
if (i >= uvXY.Length || i >= uvZW.Length) break;
Vector3 worldPos = transform.TransformPoint(vertices[i]);
Quaternion quat = GetQuaternionFromUV(uvXY[i], uvZW[i]);
// Draw forward direction
Gizmos.color = forwardColor;
Vector3 forward = transform.TransformDirection(quat * Vector3.forward);
DrawArrow(worldPos, forward, orientationScale);
}
}
void DrawVector(Vector3 origin, Vector3 direction, float scale)
{
Vector3 end = origin + direction * scale;
Gizmos.DrawLine(origin, end);
Gizmos.DrawSphere(end, 0.02f);
}
void DrawArrow(Vector3 origin, Vector3 direction, float length)
{
Vector3 end = origin + direction * length;
Gizmos.DrawLine(origin, end);
// Simple arrowhead
Vector3 right = Vector3.Cross(direction, Vector3.up).normalized;
if (right.magnitude < 0.01f)
right = Vector3.Cross(direction, Vector3.right).normalized;
Vector3 arrowBack = -direction * length * 0.2f;
Vector3 arrowSide = right * length * 0.1f;
Gizmos.DrawLine(end, end + arrowBack + arrowSide);
Gizmos.DrawLine(end, end + arrowBack - arrowSide);
}
Quaternion GetQuaternionFromUV(Vector2 xy, Vector2 zw)
{
return new Quaternion(xy.x, xy.y, zw.x, zw.y).normalized;
}
Vector3 DecodeVectorFromColor(Color color)
{
return new Vector3(
color.r * 2.0f - 1.0f,
color.g * 2.0f - 1.0f,
color.b * 2.0f - 1.0f) / color.a;
}
Vector2[] GetUVData(Mesh mesh, int channel)
{
switch (channel)
{
case 0: return mesh.uv;
case 1: return mesh.uv2;
case 2: return mesh.uv3;
case 3: return mesh.uv4;
case 4: return mesh.uv5;
case 5: return mesh.uv6;
case 6: return mesh.uv7;
case 7: return mesh.uv8;
default: return null;
}
}
}
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