85 lines
2.4 KiB
C#
85 lines
2.4 KiB
C#
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using UnityEngine;
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namespace cylvester
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{
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public interface ICombMesh
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{
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Vector3[] Vertices { get; }
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int[] Indices { get; }
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void Update(float[] spectrum);
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}
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public class CombMesh : ICombMesh
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{
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public Vector3[] Vertices { get; }
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public int[] Indices { get; }
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private IPdArray fftArray_;
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private int numberOfTeeth_;
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public CombMesh (int numberOfTeeth, float gap)
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{
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numberOfTeeth_ = numberOfTeeth;
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Vertices = CreateVertices(gap);
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Indices = CreateIndices();
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}
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public void Update(float[] spectrum)
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{
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var index = numberOfTeeth_ * 2;
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for (var i = 0; i < numberOfTeeth_; ++i)
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{
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Vertices[index++].y = spectrum[i];
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Vertices[index++].y = spectrum[i];
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}
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}
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private Vector3[] CreateVertices(float gap)
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{
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var numVerticesPerLine = numberOfTeeth_ * 2;
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var numTotalLineVertices = numberOfTeeth_ * 4;
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var currentPos = -1f;
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var step = 2f / (numberOfTeeth_ - 1);
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var width = (1f - gap) * step;
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var vertices = new Vector3[numTotalLineVertices];
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for (var i = 0; i < numberOfTeeth_ - 1; ++i)
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{
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var index = i * 2;
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vertices[index] = new Vector3(currentPos, 0, 0);
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vertices[index+1] = new Vector3(currentPos + width , 0, 0);
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vertices[index+numVerticesPerLine] = new Vector3(currentPos, 1, 0);
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vertices[index+1+numVerticesPerLine] = new Vector3(currentPos + width, 1, 0);
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currentPos += step;
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}
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return vertices;
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}
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private int[] CreateIndices( )
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{
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var numIndices = numberOfTeeth_ * 6;
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var offset = numberOfTeeth_ * 2;
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var indices = new int[numIndices];
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var index = 0;
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for (var i = 0; i < numberOfTeeth_; ++i)
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{
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var onset = i * 2;
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indices[index++] = 0 + onset;
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indices[index++] = offset + onset;
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indices[index++] = 1 + onset;
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indices[index++] = offset + onset;
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indices[index++] = offset + 1 + onset;
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indices[index++] = 1 + onset;
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}
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return indices;
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}
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}
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}
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