private void Update(EvaluationContext context)
{
var count = Count.GetValue(context).Clamp(1, 10000);
if (_points.Length != count)
{
_points = new T3.Core.DataTypes.Point[count];
}
var scale = Scale.GetValue(context);
var frequency = Frequency.GetValue(context);
var phase = Phase.GetValue(context);
var amplitude = Amplitude.GetValue(context);
var index = 0;
var thickness = Thickness.GetValue(context);
int seed = 1337;
for (var x = 0; x < count; x++)
{
var fX = x / (float)count;
var position = new Vector3(
MathUtils.PerlinNoise(phase + 0.234f + fX, frequency, 2, seed) * amplitude * scale.X,
MathUtils.PerlinNoise(phase + 110.637f + fX, frequency, 2, seed) * amplitude * scale.Y,
MathUtils.PerlinNoise(phase + 241.221f + fX, frequency, 2, seed) * amplitude * scale.Z);
_points[index].Position = position;
_points[index].W = thickness;
index++;
}
Result.Value = _points;
}
protected void UpdateSelectedItem()
{
if (EditorElement != null)
{
EditorElement.SelectedItem = Thickness.GetValue(Side);
}
}
private void Update(EvaluationContext context)
{
try
{
var resourceManager = ResourceManager.Instance();
var majorRadius = Radius.GetValue(context);
var tubeRadius = Thickness.GetValue(context);
var segments = Segments.GetValue(context);
var radiusSegments = segments.Width.Clamp(1, 10000) + 1;
var tubeSegments = segments.Height.Clamp(1, 10000) + 1;
var spin = Spin.GetValue(context);
var radiusSpin = spin.X * MathUtils.ToRad;
var spinMinorInRad = spin.Y * MathUtils.ToRad;
var fill = Fill.GetValue(context);
var fillRadius = fill.X / 360f;
var tubeFill = fill.Y / 360f;
var smoothAngle = SmoothAngle.GetValue(context);
var useFlatShading = fillRadius / tubeSegments > smoothAngle / 360 || tubeFill / radiusSegments > smoothAngle / 360;
var faceCount = (tubeSegments - 1) * (radiusSegments - 1) * 2;
var verticesCount = tubeSegments * radiusSegments;
// Create buffers
if (_vertexBufferData.Length != verticesCount)
{
_vertexBufferData = new PbrVertex[verticesCount];
}
if (_indexBufferData.Length != faceCount)
{
_indexBufferData = new SharpDX.Int3[faceCount];
}
// Initialize
var tubeAngleFraction = tubeFill / (tubeSegments - 1) * 2.0 * Math.PI;
var radiusAngleFraction = fillRadius / (radiusSegments - 1) * 2.0 * Math.PI;
for (int tubeIndex = 0; tubeIndex < tubeSegments; ++tubeIndex)
{
var tubeAngle = tubeIndex * tubeAngleFraction + spinMinorInRad;
double tubePosition1X = Math.Sin(tubeAngle) * tubeRadius;
double tubePosition1Y = Math.Cos(tubeAngle) * tubeRadius;
double tubePosition2X = Math.Sin(tubeAngle + tubeAngleFraction) * tubeRadius;
double tubePosition2Y = Math.Cos(tubeAngle + tubeAngleFraction) * tubeRadius;
var v0 = tubeIndex / (float)(tubeSegments - 1);
var v1 = (tubeIndex + 1) / (float)(tubeSegments - 1);
for (int radiusIndex = 0; radiusIndex < radiusSegments; ++radiusIndex)
{
var vertexIndex = radiusIndex + tubeIndex * radiusSegments;
var faceIndex = 2 * (radiusIndex + tubeIndex * (radiusSegments - 1));
var u0 = (radiusIndex) / (float)(radiusSegments - 1);
var u1 = (radiusIndex + 1) / (float)(radiusSegments - 1);
var radiusAngle = radiusIndex * radiusAngleFraction + radiusSpin;
var p = new SharpDX.Vector3((float)(Math.Sin(radiusAngle) * (tubePosition1X + majorRadius)),
(float)(Math.Cos(radiusAngle) * (tubePosition1X + majorRadius)),
(float)tubePosition1Y);
var p1 = new SharpDX.Vector3((float)(Math.Sin(radiusAngle + radiusAngleFraction) * (tubePosition1X + majorRadius)),
(float)(Math.Cos(radiusAngle + radiusAngleFraction) * (tubePosition1X + majorRadius)),
(float)tubePosition1Y);
var p2 = new SharpDX.Vector3((float)(Math.Sin(radiusAngle) * (tubePosition2X + majorRadius)),
(float)(Math.Cos(radiusAngle) * (tubePosition2X + majorRadius)),
(float)tubePosition2Y);
var uv0 = new SharpDX.Vector2(u0, v1);
var uv1 = new SharpDX.Vector2(u1, v1);
var uv2 = new SharpDX.Vector2(u1, v0);
var tubeCenter1 = new SharpDX.Vector3((float)Math.Sin(radiusAngle), (float)Math.Cos(radiusAngle), 0.0f) * majorRadius;
var normal0 = SharpDX.Vector3.Normalize(useFlatShading
? SharpDX.Vector3.Cross(p - p1, p - p2)
: p - tubeCenter1);
MeshUtils.CalcTBNSpace(p, uv0, p1, uv1, p2, uv2, normal0, out var tangent0, out var binormal0);
_vertexBufferData[vertexIndex + 0] = new PbrVertex
{
Position = p,
Normal = normal0,
Tangent = tangent0,
Bitangent = binormal0,
Texcoord = uv0,
Selection = 1,
};
if (tubeIndex >= tubeSegments - 1 || radiusIndex >= radiusSegments - 1)
{
continue;
}
_indexBufferData[faceIndex + 0] = new SharpDX.Int3(vertexIndex + 0, vertexIndex + 1, vertexIndex + radiusSegments);
_indexBufferData[faceIndex + 1] = new SharpDX.Int3(vertexIndex + radiusSegments, vertexIndex + 1, vertexIndex + radiusSegments + 1);
}
}
// Write Data
_vertexBufferWithViews.Buffer = _vertexBuffer;
resourceManager.SetupStructuredBuffer(_vertexBufferData, PbrVertex.Stride * verticesCount, PbrVertex.Stride, ref _vertexBuffer);
resourceManager.CreateStructuredBufferSrv(_vertexBuffer, ref _vertexBufferWithViews.Srv);
resourceManager.CreateStructuredBufferUav(_vertexBuffer, UnorderedAccessViewBufferFlags.None, ref _vertexBufferWithViews.Uav);
_indexBufferWithViews.Buffer = _indexBuffer;
const int stride = 3 * 4;
resourceManager.SetupStructuredBuffer(_indexBufferData, stride * faceCount, stride, ref _indexBuffer);
resourceManager.CreateStructuredBufferSrv(_indexBuffer, ref _indexBufferWithViews.Srv);
resourceManager.CreateStructuredBufferUav(_indexBuffer, UnorderedAccessViewBufferFlags.None, ref _indexBufferWithViews.Uav);
_data.VertexBuffer = _vertexBufferWithViews;
_data.IndicesBuffer = _indexBufferWithViews;
Data.Value = _data;
Data.DirtyFlag.Clear();
}
catch (Exception e)
{
Log.Error("Failed to create torus mesh:" + e.Message);
}
}