internal static VertexIndiceBuffer MakeSphereSegExplicit(GraphicsDevice graphicsDevice, ISector root, double diameter, double minX, double minY, double maxX, double maxY, EditorCamera camera)
{
Vector3d cameraVector = new LongLat(camera.cameraRotX, camera.cameraRotY).ToSphereVector(); // TODO: this is hacky
VertexIndiceBuffer buffer = new VertexIndiceBuffer();
List <VertexPositionNormalTexture> vertices = new List <VertexPositionNormalTexture>();
double radius = diameter / 2;
int verticalSegments = Math.Max((int)((maxY - minY) * 50), 1);
int horizontalSegments = Math.Max((int)((maxX - minX) * 50), 1);
for (int i = 0; i <= verticalSegments; i++)
{
double y = (minY + (maxY - minY) * i / (double)verticalSegments);
for (int j = 0; j <= horizontalSegments; j++)
{
double x = (minX + (maxX - minX) * j / (double)horizontalSegments);
double tx = j / (double)horizontalSegments;
double ty = i / (double)verticalSegments;
// stole this equation
Vector3d normal = root.ProjectToSphereCoordinates(new Vector2d(x, y));
Vector3d position = normal * (float)radius; // switched dy and dz here to align the poles from how we had them
Vector2d texturepos = new Vector2d((float)tx, (float)ty);
vertices.Add(new VertexPositionNormalTexture((position - cameraVector).ToVector3(), normal.ToVector3(), texturepos));
}
}
List <int> indices = MakeIndices(horizontalSegments, verticalSegments);
buffer.vertices = new VertexBuffer(graphicsDevice, VertexPositionNormalTexture.VertexDeclaration, vertices.Count, BufferUsage.WriteOnly);
buffer.vertices.SetData(vertices.ToArray());
buffer.indices = new IndexBuffer(graphicsDevice, IndexElementSize.ThirtyTwoBits, indices.Count, BufferUsage.WriteOnly);
buffer.indices.SetData(indices.ToArray());
return(buffer);
}
internal static VertexIndiceBuffer MakeBasicCube(GraphicsDevice graphicsDevice, Vector3 corner, Vector3 offx, Vector3 offy, Vector3 offz)
{
VertexIndiceBuffer buffer = new VertexIndiceBuffer();
List <VertexPositionNormalTexture> vertices = new List <VertexPositionNormalTexture>();
List <int> indices = new List <int>();
Vector3 corner2 = corner + offx + offy + offz;
AddQuad(vertices, indices, corner, offz, offx); // front
AddQuad(vertices, indices, corner, offy, offz); // left
AddQuad(vertices, indices, corner, offx, offy); // bottom
// clearly reverse the direction and rotationness to do the opposite corner
AddQuad(vertices, indices, corner2, -offx, -offz); // back
AddQuad(vertices, indices, corner2, -offz, -offy); // right
AddQuad(vertices, indices, corner2, -offy, -offx); // top
// TODO: change back to BufferUsage.WriteOnly if applicable
buffer.vertices = new VertexBuffer(graphicsDevice, VertexPositionNormalTexture.VertexDeclaration, vertices.Count, BufferUsage.None);
buffer.vertices.SetData(vertices.ToArray());
buffer.indices = new IndexBuffer(graphicsDevice, IndexElementSize.ThirtyTwoBits, indices.Count, BufferUsage.None);
buffer.indices.SetData(indices.ToArray());
return(buffer);
}
