public static void CreateCube(ProceduralMesh mesh, float width, float height, float depth, Vector3 center, Rect[] uvRect, int excludeFaces = 0)
{
float halfWidth = width * 0.5f;
float halfHeight = height * 0.5f;
float halfDepth = depth * 0.5f;
bool hasFrontFace = (excludeFaces & (int)FaceDirection.FRONT) == 0,
hasTopFace = (excludeFaces & (int)FaceDirection.TOP) == 0,
hasRightFace = (excludeFaces & (int)FaceDirection.RIGHT) == 0,
hasBackFace = (excludeFaces & (int)FaceDirection.BACK) == 0,
hasBottomFace = (excludeFaces & (int)FaceDirection.BOTTOM) == 0,
hasLeftFace = (excludeFaces & (int)FaceDirection.LEFT) == 0;
int i = mesh.vertexCount;
// front
mesh.AddVertex (center + new Vector3 (-halfWidth, halfHeight, -halfDepth));
mesh.AddVertex (center + new Vector3 (halfWidth, halfHeight, -halfDepth));
mesh.AddVertex (center + new Vector3 (halfWidth, -halfHeight, -halfDepth));
mesh.AddVertex (center + new Vector3 (-halfWidth, -halfHeight, -halfDepth));
// top
mesh.AddVertex (center + new Vector3 (-halfWidth, halfHeight, halfDepth));
mesh.AddVertex (center + new Vector3 (halfWidth, halfHeight, halfDepth));
mesh.AddVertex (center + new Vector3 (halfWidth, halfHeight, -halfDepth));
mesh.AddVertex (center + new Vector3 (-halfWidth, halfHeight, -halfDepth));
// right
mesh.AddVertex (center + new Vector3 (halfWidth, halfHeight, -halfDepth));
mesh.AddVertex (center + new Vector3 (halfWidth, halfHeight, halfDepth));
mesh.AddVertex (center + new Vector3 (halfWidth, -halfHeight, halfDepth));
mesh.AddVertex (center + new Vector3 (halfWidth, -halfHeight, -halfDepth));
// back
mesh.AddVertex (center + new Vector3 (halfWidth, halfHeight, halfDepth));
mesh.AddVertex (center + new Vector3 (-halfWidth, halfHeight, halfDepth));
mesh.AddVertex (center + new Vector3 (-halfWidth, -halfHeight, halfDepth));
mesh.AddVertex (center + new Vector3 (halfWidth, -halfHeight, halfDepth));
// bottom
mesh.AddVertex (center + new Vector3 (halfWidth, -halfHeight, -halfDepth));
mesh.AddVertex (center + new Vector3 (-halfWidth, -halfHeight, -halfDepth));
mesh.AddVertex (center + new Vector3 (-halfWidth, -halfHeight, halfDepth));
mesh.AddVertex (center + new Vector3 (halfWidth, -halfHeight, halfDepth));
// left
mesh.AddVertex (center + new Vector3 (-halfWidth, halfHeight, -halfDepth));
mesh.AddVertex (center + new Vector3 (-halfWidth, halfHeight, halfDepth));
mesh.AddVertex (center + new Vector3 (-halfWidth, -halfHeight, halfDepth));
mesh.AddVertex (center + new Vector3 (-halfWidth, -halfHeight, -halfDepth));
mesh.AddNormal (new Vector3 (0.0f, 0.0f, -1.0f));
mesh.AddNormal (new Vector3 (0.0f, 0.0f, -1.0f));
mesh.AddNormal (new Vector3 (0.0f, 0.0f, -1.0f));
mesh.AddNormal (new Vector3 (0.0f, 0.0f, -1.0f));
mesh.AddNormal (new Vector3 (0.0f, 1.0f, 0.0f));
mesh.AddNormal (new Vector3 (0.0f, 1.0f, 0.0f));
mesh.AddNormal (new Vector3 (0.0f, 1.0f, 0.0f));
mesh.AddNormal (new Vector3 (0.0f, 1.0f, 0.0f));
mesh.AddNormal (new Vector3 (1.0f, 0.0f, 0.0f));
mesh.AddNormal (new Vector3 (1.0f, 0.0f, 0.0f));
mesh.AddNormal (new Vector3 (1.0f, 0.0f, 0.0f));
mesh.AddNormal (new Vector3 (1.0f, 0.0f, 0.0f));
mesh.AddNormal (new Vector3 (0.0f, 0.0f, 1.0f));
mesh.AddNormal (new Vector3 (0.0f, 0.0f, 1.0f));
mesh.AddNormal (new Vector3 (0.0f, 0.0f, 1.0f));
mesh.AddNormal (new Vector3 (0.0f, 0.0f, 1.0f));
mesh.AddNormal (new Vector3 (0.0f, -1.0f, 0.0f));
mesh.AddNormal (new Vector3 (0.0f, -1.0f, 0.0f));
mesh.AddNormal (new Vector3 (0.0f, -1.0f, 0.0f));
mesh.AddNormal (new Vector3 (0.0f, -1.0f, 0.0f));
mesh.AddNormal (new Vector3 (-1.0f, 0.0f, 0.0f));
mesh.AddNormal (new Vector3 (-1.0f, 0.0f, 0.0f));
mesh.AddNormal (new Vector3 (-1.0f, 0.0f, 0.0f));
mesh.AddNormal (new Vector3 (-1.0f, 0.0f, 0.0f));
// front
mesh.AddUv (new Vector2 (uvRect [0].xMin, uvRect [0].yMax));
mesh.AddUv (new Vector2 (uvRect [0].xMax, uvRect [0].yMax));
mesh.AddUv (new Vector2 (uvRect [0].xMax, uvRect [0].yMin));
mesh.AddUv (new Vector2 (uvRect [0].xMin, uvRect [0].yMin));
// top
mesh.AddUv (new Vector2 (uvRect [1].xMin, uvRect [1].yMax));
mesh.AddUv (new Vector2 (uvRect [1].xMax, uvRect [1].yMax));
mesh.AddUv (new Vector2 (uvRect [1].xMax, uvRect [1].yMin));
mesh.AddUv (new Vector2 (uvRect [1].xMin, uvRect [1].yMin));
// right
mesh.AddUv (new Vector2 (uvRect [2].xMin, uvRect [2].yMax));
mesh.AddUv (new Vector2 (uvRect [2].xMax, uvRect [2].yMax));
mesh.AddUv (new Vector2 (uvRect [2].xMax, uvRect [2].yMin));
mesh.AddUv (new Vector2 (uvRect [2].xMin, uvRect [2].yMin));
// back
mesh.AddUv (new Vector2 (uvRect [3].xMin, uvRect [3].yMax));
mesh.AddUv (new Vector2 (uvRect [3].xMax, uvRect [3].yMax));
mesh.AddUv (new Vector2 (uvRect [3].xMax, uvRect [3].yMin));
mesh.AddUv (new Vector2 (uvRect [3].xMin, uvRect [3].yMin));
// bottom
mesh.AddUv (new Vector2 (uvRect [4].xMin, uvRect [4].yMin));
mesh.AddUv (new Vector2 (uvRect [4].xMax, uvRect [4].yMin));
mesh.AddUv (new Vector2 (uvRect [4].xMax, uvRect [4].yMax));
mesh.AddUv (new Vector2 (uvRect [4].xMin, uvRect [4].yMax));
// left
mesh.AddUv (new Vector2 (uvRect [5].xMin, uvRect [5].yMax));
mesh.AddUv (new Vector2 (uvRect [5].xMax, uvRect [5].yMax));
mesh.AddUv (new Vector2 (uvRect [5].xMax, uvRect [5].yMin));
mesh.AddUv (new Vector2 (uvRect [5].xMin, uvRect [5].yMin));
// front
if (hasFrontFace) {
mesh.AddIndex (i);
mesh.AddIndex (i + 1);
mesh.AddIndex (i + 2);
mesh.AddIndex (i);
mesh.AddIndex (i + 2);
mesh.AddIndex (i + 3);
} else {
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
}
// top
if (hasTopFace) {
mesh.AddIndex (i + 4);
mesh.AddIndex (i + 5);
mesh.AddIndex (i + 6);
mesh.AddIndex (i + 4);
mesh.AddIndex (i + 6);
mesh.AddIndex (i + 7);
} else {
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
}
// right
if (hasRightFace) {
mesh.AddIndex (i + 8);
mesh.AddIndex (i + 9);
mesh.AddIndex (i + 10);
mesh.AddIndex (i + 8);
mesh.AddIndex (i + 10);
mesh.AddIndex (i + 11);
} else {
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
}
// back
if (hasBackFace) {
mesh.AddIndex (i + 12);
mesh.AddIndex (i + 13);
mesh.AddIndex (i + 14);
mesh.AddIndex (i + 12);
mesh.AddIndex (i + 14);
mesh.AddIndex (i + 15);
} else {
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
}
// bottom
if (hasBottomFace) {
mesh.AddIndex (i + 16);
mesh.AddIndex (i + 18);
mesh.AddIndex (i + 17);
mesh.AddIndex (i + 16);
mesh.AddIndex (i + 19);
mesh.AddIndex (i + 18);
} else {
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
}
// left
if (hasLeftFace) {
mesh.AddIndex (i + 20);
mesh.AddIndex (i + 22);
mesh.AddIndex (i + 21);
mesh.AddIndex (i + 20);
mesh.AddIndex (i + 23);
mesh.AddIndex (i + 22);
} else {
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
mesh.AddIndex (0);
}
}