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Dec 19, 2024 . 2 changed files with 11 additions and 11 deletions.There are no files selected for viewing
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -20,6 +20,17 @@ // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE // SOFTWARE. // Terrain Chunk Mesh Generator // ._____._____. // |\ | /|\ | /| // |_\|/_|_\|/_| // | /|\ | /|\ | // |/_|_\|/_|_\| // |\ | /|\ | /| // |_\|/_|_\|/_| // | /|\ | /|\ | // |/_|_\|/_|_\| public static class TerrainChunkGenerator { public static int GetChunkDimension(int sections) This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -1,14 +1,3 @@ int sections = 2; int dimension = TerrainChunkGenerator.GetChunkDimension(sections); -
Dec 19, 2024 . 2 changed files with 49 additions and 55 deletions.There are no files selected for viewing
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -1,53 +1,58 @@ // Terrain Chunk Mesh Generator // ._____._____. // |\ | /|\ | /| // |_\|/_|_\|/_| // | /|\ | /|\ | // |/_|_\|/_|_\| // |\ | /|\ | /| // |_\|/_|_\|/_| // | /|\ | /|\ | // |/_|_\|/_|_\| int sections = 2; int dimension = TerrainChunkGenerator.GetChunkDimension(sections); var vertices = TerrainChunkGenerator.GenChunkVertices(dimension); var normals = TerrainChunkGenerator.GenChunkNormals(dimension); var texcoords = TerrainChunkGenerator.GenChunkTexcoords(dimension); var indexes = TerrainChunkGenerator.GenChunkIndexes(dimension); using (var file = File.Create("./test.obj")) { using var writer = new StreamWriter(file); writer.WriteLine("o terrain-chunk"); writer.WriteLine("# Vertices"); for (int row = 0; row < dimension; row++) { for (int col = 0; col < dimension; col++) { writer.WriteLine(vertices[col + row * dimension].ToObjVertex()); } } writer.WriteLine("# Normals"); for (int row = 0; row < dimension; row++) { for (int col = 0; col < dimension; col++) { writer.WriteLine(normals[col + row * dimension].ToObjNormal()); } } writer.WriteLine("# Texcoords"); for (int row = 0; row < dimension; row++) { for (int col = 0; col < dimension; col++) { writer.WriteLine(texcoords[col + row * dimension].ToObjTexcoord()); } } writer.WriteLine("# Indexes"); writer.WriteLine("g terrain-chunk"); for (int i = 0; i < indexes.Length; i += 3) { writer.WriteLine("f " + string.Join(' ', indexes[i..(i + 3)].Select(index => $"{index}/{index}/{index}"))); } } This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -20,17 +20,6 @@ // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE // SOFTWARE. public static class TerrainChunkGenerator { public static int GetChunkDimension(int sections) -
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This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,53 @@ public class Example { private static void Main(string[] args) { int sections = 2; int dimension = TerrainChunkGenerator.GetChunkDimension(sections); var vertices = TerrainChunkGenerator.GenChunkVertices(dimension); var normals = TerrainChunkGenerator.GenChunkNormals(dimension); var texcoords = TerrainChunkGenerator.GenChunkTexcoords(dimension); var indexes = TerrainChunkGenerator.GenChunkIndexes(dimension); using (var file = File.Create("./test.obj")) { using var writer = new StreamWriter(file); writer.WriteLine("o terrain-chunk"); writer.WriteLine("# Vertices"); for (int row = 0; row < dimension; row++) { for (int col = 0; col < dimension; col++) { writer.WriteLine(vertices[col + row * dimension].ToObjVertex()); } } writer.WriteLine("# Normals"); for (int row = 0; row < dimension; row++) { for (int col = 0; col < dimension; col++) { writer.WriteLine(normals[col + row * dimension].ToObjNormal()); } } writer.WriteLine("# Texcoords"); for (int row = 0; row < dimension; row++) { for (int col = 0; col < dimension; col++) { writer.WriteLine(texcoords[col + row * dimension].ToObjTexcoord()); } } writer.WriteLine("# Indexes"); writer.WriteLine("g terrain-chunk"); for (int i = 0; i < indexes.Length; i += 3) { writer.WriteLine("f " + string.Join(' ', indexes[i..(i + 3)].Select(index => $"{index}/{index}/{index}"))); } } } } This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,165 @@ // MIT License // // Copyright (c) 2024 Alexander Malyutin // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to deal // in the Software without restriction, including without limitation the rights // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell // copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in all // copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE // SOFTWARE. // Terrain Chunk Mesh Generator // ._____._____. // |\ | /|\ | /| // |_\|/_|_\|/_| // | /|\ | /|\ | // |/_|_\|/_|_\| // |\ | /|\ | /| // |_\|/_|_\|/_| // | /|\ | /|\ | // |/_|_\|/_|_\| public static class TerrainChunkGenerator { public static int GetChunkDimension(int sections) { return sections * 2 + 1; } public static Vector3[] GenChunkVertices(int dimension) { var vertices = new Vector3[dimension * dimension]; for (int row = 0; row < dimension; row++) { for (int col = 0; col < dimension; col++) { vertices[col + row * dimension] = new Vector3( (float)col / (dimension - 1), 0.0f, (float)row / (dimension - 1) ); } } return vertices; } public static Vector3[] GenChunkNormals(int dimension) { var normals = new Vector3[dimension * dimension]; for (int row = 0; row < dimension; row++) { for (int col = 0; col < dimension; col++) { normals[col + row * dimension] = new Vector3(0.0f, 1.0f, 0.0f); } } return normals; } public static Vector2[] GenChunkTexcoords(int dimension) { var texcoords = new Vector2[dimension * dimension]; for (int row = 0; row < dimension; row++) { for (int col = 0; col < dimension; col++) { texcoords[col + row * dimension] = new Vector2( (float)col / (dimension - 1), (float)row / (dimension - 1) ); } } return texcoords; } public static int[] GenChunkIndexes(int dimension) { int[] indexes = new int[(dimension - 1) * (dimension - 1) * 2 * 3]; var indexesSpan = new Span<int>(indexes, 0, indexes.Length); for (int row = 0; row < dimension - 1; row++) { for (int col = 0; col < dimension - 1; col++) { var temp = indexesSpan.Slice((col + row * (dimension - 1)) * 6, 6); GetQuadIndexes(col + row * dimension + 1, dimension, (col + row * dimension) % 2 == 0, ref temp); } } return indexes; } public static void GetQuadIndexes(int bottomLeftVertexIndex, int chunkDimension, bool antiDiagonal, ref Span<int> arr) { if (antiDiagonal) { // .__. // | /| // |/_| int k = 0; arr[k++] = bottomLeftVertexIndex; arr[k++] = bottomLeftVertexIndex + chunkDimension; arr[k++] = bottomLeftVertexIndex + chunkDimension + 1; arr[k++] = bottomLeftVertexIndex; arr[k++] = bottomLeftVertexIndex + chunkDimension + 1; arr[k++] = bottomLeftVertexIndex + 1; } else { // .__. // |\ | // |_\| int k = 0; arr[k++] = bottomLeftVertexIndex; arr[k++] = bottomLeftVertexIndex + chunkDimension; arr[k++] = bottomLeftVertexIndex + 1; arr[k++] = bottomLeftVertexIndex + 1; arr[k++] = bottomLeftVertexIndex + chunkDimension; arr[k++] = bottomLeftVertexIndex + chunkDimension + 1; } } } public struct Vector2 { public float x, y; public Vector2(float x, float y) : this() { this.x = x; this.y = y; } public string ToObjTexcoord() => $"vt {x:F} {y:F}"; } public struct Vector3 { public float x, y, z; public Vector3(float x, float y, float z) : this() { this.x = x; this.y = y; this.z = z; } public string ToObjVertex() => $"v {x:F} {y:F} {z:F}"; public string ToObjNormal() => $"vn {x:F} {y:F} {z:F}"; }