private void BufferData(Camera camera)
{
var coneHeight = 0.25f;
Conic_ arrow = new Conic_(coneHeight, coneHeight / Maths.Phi);
var rightArrowCoordinates = TransformCoordinates(ref arrow, this.right);
var forwardArrowCoordinates = TransformCoordinates(ref arrow, this.forward);
var upArrowCoordinates = TransformCoordinates(ref arrow, this.up);
var vertexCount = arrow.VertexCoordinates.Count;
var magic = 1 - Maths.PhiConjugate;
var coordinates = new Vector3[] {
origin + right * magic,
origin + forward * magic,
origin + up * magic,
origin + right,
origin + forward,
origin + up
}
.Concat(rightArrowCoordinates)
.Concat(forwardArrowCoordinates)
.Concat(upArrowCoordinates).ToArray( );
var indices = new ushort[] { 0, 3, 1, 4, 2, 5 };
var offset = indices.Length;
var rightArrowIndices = arrow.Indices.Select(x => x == ushort.MaxValue ? x : (ushort)(x + offset)).ToArray( );
offset += vertexCount;
var forwardArrowIndices = arrow.Indices.Select(x => x == ushort.MaxValue ? x : (ushort)(x + offset)).ToArray( );
offset += vertexCount;
var upArrowIndices = arrow.Indices.Select(x => x == ushort.MaxValue ? x : (ushort)(x + offset)).ToArray( );
indices = indices.Concat(rightArrowIndices).Concat(new[] { ushort.MaxValue })
.Concat(forwardArrowIndices).Concat(new[] { ushort.MaxValue })
.Concat(upArrowIndices).ToArray( );
this.elementCount = indices.Length;
BufferData(coordinates, indices);
}
private IEnumerable <Vector3> TransformCoordinates(ref Conic_ arrow, Vector3 targetAxis)
{
var normal = targetAxis;
normal.Normalize( );
normal.Normalize( );// idk.
var dot = Vector3.Dot(Vector3.UnitZ, normal);
var axis = Vector3.Cross(Vector3.UnitZ, normal);
var projection = axis.Length;
var angle = (float)Math.Acos(dot);
var translationMatrix = Matrix4.CreateTranslation(origin + targetAxis);
var rotationMatrix = dot == 1 || dot == -1 ? Matrix4.Identity : Matrix4.CreateFromAxisAngle(axis, angle);
var scaleMatrix = Matrix4.CreateScale(this.scale == 0 ? 1 : scale);
var matrix = scaleMatrix * rotationMatrix * translationMatrix;
var rightArrowCoordinates = arrow.VertexCoordinates.Select(x => Vector3.Transform(x, matrix)).ToArray( );
return(rightArrowCoordinates);
}
private IEnumerable<Vector3> TransformCoordinates(ref Conic_ arrow, Vector3 targetAxis)
{
var normal = targetAxis;
normal.Normalize();
normal.Normalize();// idk.
var dot = Vector3.Dot(Vector3.UnitZ, normal);
var axis = Vector3.Cross(Vector3.UnitZ, normal);
var projection = axis.Length;
var angle = (float)Math.Acos(dot);
var translationMatrix = Matrix4.CreateTranslation(origin + targetAxis);
var rotationMatrix = dot == 1 || dot == -1 ? Matrix4.Identity : Matrix4.CreateFromAxisAngle(axis, angle);
var scaleMatrix = Matrix4.CreateScale(this.scale == 0 ? 1 : scale);
var matrix = scaleMatrix * rotationMatrix * translationMatrix;
var rightArrowCoordinates = arrow.VertexCoordinates.Select(x => Vector3.Transform(x, matrix)).ToArray();
return rightArrowCoordinates;
}
private void BufferData(Camera camera)
{
var coneHeight = 0.25f;
Conic_ arrow = new Conic_(coneHeight, coneHeight / Maths.Phi);
var rightArrowCoordinates = TransformCoordinates(ref arrow, this.right);
var forwardArrowCoordinates = TransformCoordinates(ref arrow, this.forward);
var upArrowCoordinates = TransformCoordinates(ref arrow, this.up);
var vertexCount = arrow.VertexCoordinates.Count;
var magic = 1 - Maths.PhiConjugate;
var coordinates = new Vector3[] {
origin + right * magic,
origin + forward * magic,
origin + up * magic,
origin + right,
origin + forward,
origin + up }
.Concat(rightArrowCoordinates)
.Concat(forwardArrowCoordinates)
.Concat(upArrowCoordinates).ToArray();
var indices = new ushort[] { 0, 3, 1, 4, 2, 5 };
var offset = indices.Length;
var rightArrowIndices = arrow.Indices.Select(x => x == ushort.MaxValue ? x : (ushort)(x + offset)).ToArray();
offset += vertexCount;
var forwardArrowIndices = arrow.Indices.Select(x => x == ushort.MaxValue ? x : (ushort)(x + offset)).ToArray();
offset += vertexCount;
var upArrowIndices = arrow.Indices.Select(x => x == ushort.MaxValue ? x : (ushort)(x + offset)).ToArray();
indices = indices.Concat(rightArrowIndices).Concat(new[] { ushort.MaxValue })
.Concat(forwardArrowIndices).Concat(new[] { ushort.MaxValue })
.Concat(upArrowIndices).ToArray();
this.elementCount = indices.Length;
BufferData(coordinates, indices);
}