101 lines
2.4 KiB
C#
101 lines
2.4 KiB
C#
using UnityEngine;
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namespace UnityStandardAssets.ImageEffects
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{
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internal class Triangles
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{
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private static Mesh[] meshes;
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private static int currentTris;
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private static bool HasMeshes()
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{
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if (meshes == null)
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{
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return false;
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}
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for (int i = 0; i < meshes.Length; i++)
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{
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if (null == meshes[i])
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{
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return false;
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}
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}
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return true;
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}
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private static void Cleanup()
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{
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if (meshes == null)
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{
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return;
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}
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for (int i = 0; i < meshes.Length; i++)
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{
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if (null != meshes[i])
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{
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Object.DestroyImmediate(meshes[i]);
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meshes[i] = null;
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}
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}
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meshes = null;
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}
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private static Mesh[] GetMeshes(int totalWidth, int totalHeight)
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{
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if (HasMeshes() && currentTris == totalWidth * totalHeight)
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{
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return meshes;
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}
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int num = 21666;
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int num2 = (currentTris = totalWidth * totalHeight);
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int num3 = Mathf.CeilToInt(1f * (float)num2 / (1f * (float)num));
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meshes = new Mesh[num3];
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int num4 = 0;
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int num5 = 0;
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for (num4 = 0; num4 < num2; num4 += num)
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{
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int triCount = Mathf.FloorToInt(Mathf.Clamp(num2 - num4, 0, num));
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meshes[num5] = GetMesh(triCount, num4, totalWidth, totalHeight);
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num5++;
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}
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return meshes;
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}
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private static Mesh GetMesh(int triCount, int triOffset, int totalWidth, int totalHeight)
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{
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Mesh mesh = new Mesh();
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mesh.hideFlags = HideFlags.DontSave;
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Vector3[] array = new Vector3[triCount * 3];
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Vector2[] array2 = new Vector2[triCount * 3];
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Vector2[] array3 = new Vector2[triCount * 3];
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int[] array4 = new int[triCount * 3];
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for (int i = 0; i < triCount; i++)
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{
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int num = i * 3;
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int num2 = triOffset + i;
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float num3 = Mathf.Floor(num2 % totalWidth) / (float)totalWidth;
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float num4 = Mathf.Floor(num2 / totalWidth) / (float)totalHeight;
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Vector3 vector = new Vector3(num3 * 2f - 1f, num4 * 2f - 1f, 1f);
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array[num] = vector;
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array[num + 1] = vector;
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array[num + 2] = vector;
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array2[num] = new Vector2(0f, 0f);
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array2[num + 1] = new Vector2(1f, 0f);
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array2[num + 2] = new Vector2(0f, 1f);
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array3[num] = new Vector2(num3, num4);
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array3[num + 1] = new Vector2(num3, num4);
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array3[num + 2] = new Vector2(num3, num4);
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array4[num] = num;
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array4[num + 1] = num + 1;
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array4[num + 2] = num + 2;
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}
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mesh.vertices = array;
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mesh.triangles = array4;
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mesh.uv = array2;
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mesh.uv2 = array3;
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return mesh;
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}
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}
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}
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