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Assets/Dreamteck/Splines/Components/WaveformGenerator.cs

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+using UnityEngine;
+using System.Collections;
+using System.Collections.Generic;
+
+namespace Dreamteck.Splines
+{
+    [RequireComponent(typeof(MeshFilter))]
+    [RequireComponent(typeof(MeshRenderer))]
+    [AddComponentMenu("Dreamteck/Splines/Waveform Generator")]
+    public class WaveformGenerator : MeshGenerator
+    {
+        public enum Axis { X, Y, Z }
+        public enum Space { World, Local }
+        public enum UVWrapMode { Clamp, UniformX, UniformY, Uniform }
+
+        public Axis axis
+        {
+            get { return _axis; }
+            set
+            {
+                if (value != _axis)
+                {
+                    _axis = value;
+                    Rebuild();
+                }
+            }
+        }
+
+        public bool symmetry
+        {
+            get { return _symmetry; }
+            set
+            {
+                if (value != _symmetry)
+                {
+                    _symmetry = value;
+                    Rebuild();
+                }
+            }
+        }
+
+        public UVWrapMode uvWrapMode
+        {
+            get { return _uvWrapMode; }
+            set
+            {
+                if (value != _uvWrapMode)
+                {
+                    _uvWrapMode = value;
+                    Rebuild();
+                }
+            }
+        }
+
+        public int slices
+        {
+            get { return _slices; }
+            set
+            {
+                if (value != _slices)
+                {
+                    if (value < 1) value = 1;
+                    _slices = value;
+                    Rebuild();
+                }
+            }
+        }
+
+        [SerializeField]
+        [HideInInspector]
+        private Axis _axis = Axis.Y;
+        [SerializeField]
+        [HideInInspector]
+        private bool _symmetry = false;
+        [SerializeField]
+        [HideInInspector]
+        private UVWrapMode _uvWrapMode = UVWrapMode.Clamp;
+        [SerializeField]
+        [HideInInspector]
+        private int _slices = 1;
+
+        protected override void Awake()
+        {
+            base.Awake();
+            mesh.name = "waveform";
+        }
+
+        protected override void BuildMesh()
+        {
+            base.BuildMesh();
+            Generate();
+        }
+
+        protected override void Build()
+        {
+            base.Build();
+        }
+
+        protected override void LateRun()
+        {
+            base.LateRun();
+        }
+
+        private void Generate()
+        {
+            int vertexCount = sampleCount * (_slices + 1);
+            AllocateMesh(vertexCount, _slices * (sampleCount - 1) * 6);
+            int vertIndex = 0;
+            float avgTop = 0f;
+            float totalLength = 0f;
+            Vector3 computerPosition = spline.position;
+            Vector3 normal = spline.TransformDirection(Vector3.right);
+            switch (_axis)
+            {
+                case Axis.Y: normal = spline.TransformDirection(Vector3.up); break;
+                case Axis.Z: normal = spline.TransformDirection(Vector3.forward); break;
+            }
+
+            for (int i = 0; i < sampleCount; i++)
+            {
+                Vector3 samplePosition = GetSampleRaw(i).position;
+                Vector3 localSamplePosition = spline.InverseTransformPoint(samplePosition);
+                Vector3 bottomPosition = localSamplePosition;
+                Vector3 sampleDirection = GetSampleRaw(i).forward;
+                Vector3 sampleNormal = GetSampleRaw(i).up;
+
+                float heightPercent = 1f;
+                if (_uvWrapMode == UVWrapMode.UniformX || _uvWrapMode == UVWrapMode.Uniform)
+                {
+                    if (i > 0) totalLength += Vector3.Distance(GetSampleRaw(i).position, GetSampleRaw(i - 1).position);
+                }
+                switch (_axis)
+                {
+                    case Axis.X: bottomPosition.x = _symmetry ? -localSamplePosition.x : 0f; heightPercent = uvScale.y * Mathf.Abs(localSamplePosition.x); avgTop += localSamplePosition.x; break;
+                    case Axis.Y: bottomPosition.y = _symmetry ? -localSamplePosition.y : 0f;  heightPercent = uvScale.y * Mathf.Abs(localSamplePosition.y); avgTop += localSamplePosition.y; break;
+                    case Axis.Z: bottomPosition.z = _symmetry ? -localSamplePosition.z : 0f;  heightPercent = uvScale.y * Mathf.Abs(localSamplePosition.z); avgTop += localSamplePosition.z; break;
+                }
+                bottomPosition = spline.TransformPoint(bottomPosition);
+                Vector3 right = Vector3.Cross(normal, sampleDirection).normalized;
+                Vector3 offsetRight = Vector3.Cross(sampleNormal, sampleDirection);
+                
+                for (int n = 0; n < _slices + 1; n++)
+                {
+                    float slicePercent = ((float)n / _slices);
+                    tsMesh.vertices[vertIndex] = Vector3.Lerp(bottomPosition, samplePosition, slicePercent) + normal * offset.y + offsetRight * offset.x;
+                    tsMesh.normals[vertIndex] = right;
+                    switch (_uvWrapMode)
+                    {
+                        case UVWrapMode.Clamp: tsMesh.uv[vertIndex] = new Vector2((float)GetSampleRaw(i).percent * uvScale.x + uvOffset.x, slicePercent * uvScale.y + uvOffset.y); break;
+                        case UVWrapMode.UniformX: tsMesh.uv[vertIndex] = new Vector2(totalLength * uvScale.x + uvOffset.x, slicePercent * uvScale.y + uvOffset.y); break;
+                        case UVWrapMode.UniformY: tsMesh.uv[vertIndex] = new Vector2((float)GetSampleRaw(i).percent * uvScale.x + uvOffset.x, heightPercent * slicePercent * uvScale.y + uvOffset.y); break;
+                        case UVWrapMode.Uniform: tsMesh.uv[vertIndex] = new Vector2(totalLength * uvScale.x + uvOffset.x, heightPercent * slicePercent * uvScale.y + uvOffset.y); break;
+                    }
+                    tsMesh.colors[vertIndex] = GetSampleRaw(i).color * color;
+                    vertIndex++;
+                }
+            }
+            if (sampleCount > 0) avgTop /= sampleCount;
+            MeshUtility.GeneratePlaneTriangles(ref tsMesh.triangles, _slices, sampleCount, avgTop < 0f);
+        }
+    }
+}