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Fix for gaps in cave walls #3

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Fix for gaps in cave walls #3

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55 changes: 38 additions & 17 deletions Unity Project/Assets/Scripts/MeshGenerator.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -70,23 +70,44 @@ void CreateWallMesh() {
Mesh wallMesh = new Mesh ();
float wallHeight = 5;

foreach (List<int> outline in outlines) {
for (int i = 0; i < outline.Count -1; i ++) {
int startIndex = wallVertices.Count;
wallVertices.Add(vertices[outline[i]]); // left
wallVertices.Add(vertices[outline[i+1]]); // right
wallVertices.Add(vertices[outline[i]] - Vector3.up * wallHeight); // bottom left
wallVertices.Add(vertices[outline[i+1]] - Vector3.up * wallHeight); // bottom right

wallTriangles.Add(startIndex + 0);
wallTriangles.Add(startIndex + 2);
wallTriangles.Add(startIndex + 3);

wallTriangles.Add(startIndex + 3);
wallTriangles.Add(startIndex + 1);
wallTriangles.Add(startIndex + 0);
}
}
for( int outlineCount = 0; outlineCount < outlines.Count; outlineCount++ ) {
List<int> outline = outlines[outlineCount];
for (int i = 0; i < outline.Count-1; i ++) {
int startIndex = wallVertices.Count;
wallVertices.Add(vertices[outline[i]]); // left
wallVertices.Add(vertices[outline[i+1]]); // right
wallVertices.Add(vertices[outline[i]] - Vector3.up * wallHeight); // bottom left
wallVertices.Add(vertices[outline[i+1]] - Vector3.up * wallHeight); // bottom right

wallTriangles.Add(startIndex + 0);
wallTriangles.Add(startIndex + 2);
wallTriangles.Add(startIndex + 3);

wallTriangles.Add(startIndex + 3);
wallTriangles.Add(startIndex + 1);
wallTriangles.Add(startIndex + 0);

// on the last time through this outline loop, connect the first/last vertices (close the gap)
if( i + 1 >= outline.Count-1 )
{
startIndex = wallVertices.Count;

wallVertices.Add(vertices[outline[0]] - Vector3.up * wallHeight); // bottom left
wallVertices.Add(vertices[outline[i+1]] - Vector3.up * wallHeight); // bottom right
wallVertices.Add(vertices[outline[0]]); // left
wallVertices.Add(vertices[outline[i+1]]); // right

wallTriangles.Add(startIndex + 0);
wallTriangles.Add(startIndex + 2);
wallTriangles.Add(startIndex + 3);

wallTriangles.Add(startIndex + 3);
wallTriangles.Add(startIndex + 1);
wallTriangles.Add(startIndex + 0);
}
}
}

wallMesh.vertices = wallVertices.ToArray ();
wallMesh.triangles = wallTriangles.ToArray ();
walls.mesh = wallMesh;
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