GameObject MakeSurface(Vector3 position)
{
// Make the surface
GameObject surface = new GameObject();
MeshRenderer mr = surface.AddComponent <MeshRenderer>();
MeshFilter mf = surface.AddComponent <MeshFilter>();
Vector3 tileBottomLeft = new Vector3();
tileBottomLeft.x = -(quadsPerTile * cellSize) / 2;
tileBottomLeft.z = -(quadsPerTile * cellSize) / 2;
Vector3 tileTopRight = new Vector3();
tileTopRight.x = (quadsPerTile * cellSize) / 2;
tileTopRight.z = (quadsPerTile * cellSize) / 2;
GeneratedMesh gm = new GeneratedMesh(6, 6);
gm.vertices[0] = tileTopRight;
gm.vertices[1] = new Vector3(tileBottomLeft.x, 0, tileTopRight.z);
gm.vertices[2] = tileBottomLeft;
gm.vertices[3] = new Vector3(tileTopRight.x, 0, tileBottomLeft.z);
gm.vertices[4] = tileTopRight;
gm.vertices[5] = tileBottomLeft;
for (int i = 0; i < 6; i++)
{
gm.triangles[i] = i;
}
gm.uv[0] = MakeUV(position, quadsPerTile, quadsPerTile);
gm.uv[1] = MakeUV(position, 0, quadsPerTile);
gm.uv[2] = MakeUV(position, 0, 0);
gm.uv[3] = MakeUV(position, quadsPerTile, 0);
gm.uv[4] = MakeUV(position, quadsPerTile, quadsPerTile);
gm.uv[5] = MakeUV(position, 0, 0);
Mesh mesh = new Mesh();
mesh.vertices = gm.vertices;
mesh.uv = gm.uv;
mesh.triangles = gm.triangles;
mesh.RecalculateNormals();
mf.mesh = mesh;
mr.castShadows = false;
mr.receiveShadows = false;
mr.material = ceilingMaterial;
mr.material.SetTexture("_MainTex", textureGenerator.texture);
mr.material.SetTexture("_EmissionMap", textureGenerator.texture);
//Utilities.SetupMaterialWithBlendMode(mr.material, BlendMode.Transparent);
surface.AddComponent <MeshCollider>().sharedMesh = mesh;
//Utilities.SetupMaterialWithBlendMode(mr.material, BlendMode.Transparent);
surface.layer = ceilingLayer;
surface.name = "surface";
return(surface);
}
Mesh GenerateMesh(Vector3 position)
{
int verticesPerSegment = 6;
int triangleCount = verticesPerSegment * ((int)quadsPerTile) * ((int)quadsPerTile);
int vertexCount = 4 * ((int)quadsPerTile) * ((int)quadsPerTile);
int vertex = 0;
// What cell is x and z for the bottom left of this tile in world space
Vector3 tileBottomLeft = new Vector3();
tileBottomLeft.x = -(quadsPerTile * cellSize) / 2;
tileBottomLeft.z = -(quadsPerTile * cellSize) / 2;
GeneratedMesh gm = new GeneratedMesh(vertexCount, triangleCount);
Vector2 texOrigin = position / cellSize;
texOrigin.x = texOrigin.x % textureGenerator.size;
texOrigin.y = texOrigin.y % textureGenerator.size;
float tilesPerTexture = textureGenerator.size / quadsPerTile;
int triangleVertex = 0;
for (int z = 0; z < quadsPerTile; z++)
{
for (int x = 0; x < quadsPerTile; x++)
{
int startVertex = vertex;
// Cell bottom left is the 0 indexed position of the cell on a tile
// Kinda like local space on the tile
// We neeed these to make the vertices out of
Vector3 cellBottomLeft = tileBottomLeft + new Vector3(x * cellSize, 0, z * cellSize);
Vector3 cellTopLeft = tileBottomLeft + new Vector3(x * cellSize, 0, ((z + 1) * cellSize));
Vector3 cellTopRight = tileBottomLeft + new Vector3((x + 1) * cellSize, 0, (z + 1) * cellSize);
Vector3 cellBottomRight = tileBottomLeft + new Vector3((x + 1) * cellSize, 0, z * cellSize);
// Add all the samplers together to make the height
// Cell is the absolute position of the cell in world space. I.e what gets sampled
Vector3 cellLeft = new Vector3(-quadsPerTile / 2, 0, -quadsPerTile / 2);
Vector3 cell = (position / cellSize) + cellLeft + new Vector3(x, 0, z);
cellBottomLeft.y = SampleCell(cell.x, cell.z);
cellTopLeft.y = SampleCell(cell.x, cell.z + 1);
cellTopRight.y = SampleCell(cell.x + 1, cell.z + 1);
cellBottomRight.y = SampleCell(cell.x + 1, cell.z);
// Make the vertices
startVertex = vertex;
gm.vertices[vertex++] = cellBottomLeft;
gm.vertices[vertex++] = cellTopLeft;
gm.vertices[vertex++] = cellTopRight;
gm.vertices[vertex++] = cellBottomRight;
vertex = startVertex;
gm.uv[vertex++] = MakeUV(position, x, z);
gm.uv[vertex++] = MakeUV(position, x, z + 1);
gm.uv[vertex++] = MakeUV(position, x + 1, z + 1);
gm.uv[vertex++] = MakeUV(position, x + 1, z);
gm.triangles[triangleVertex++] = startVertex;
gm.triangles[triangleVertex++] = startVertex + 1;
gm.triangles[triangleVertex++] = startVertex + 3;
gm.triangles[triangleVertex++] = startVertex + 3;
gm.triangles[triangleVertex++] = startVertex + 1;
gm.triangles[triangleVertex++] = startVertex + 2;
}
}
Mesh mesh = new Mesh();
mesh.vertices = gm.vertices;
mesh.uv = gm.uv;
mesh.triangles = gm.triangles;
mesh.RecalculateNormals();
return(mesh);
}