public void FinishWithCicle(float Spacetime)
{
float time = (float)maxTime + Spacetime;
heads.AddPoint(heads.GetPointOnCurve(0), time);
targets.AddPoint(targets.GetPointOnCurve(0), time);
ups.AddPoint(ups.GetPointOnCurve(0), time);
maxTime = time;
}
public override void _Process(float delta)
{
if ((int)root.rpm != 0)
{
var curve = new Curve3D();
curve.UpVectorEnabled = true;
for (int i = 0; i < 15; i += 5)
{
curve.AddPoint(new Vector3(Translation.x, root.height.GetNoise2d(Translation.x, Translation.z - i) * 20, Translation.z - i));
}
var offset = ((root.rpm * (float)Math.PI * 2.0f) / 60.0f) * 0.60f * delta;
Translation = curve.InterpolateBaked(offset);
LookAt(Translation + curve.InterpolateBakedUpVector(offset).Rotated(Vector3.Right, -(float)Math.PI / 2), Vector3.Up);
}
else if (Input.IsKeyPressed((int)KeyList.Z))
{
var curve = new Curve3D();
curve.UpVectorEnabled = true;
for (int i = 0; i < 15; i += 5)
{
curve.AddPoint(new Vector3(Translation.x, root.height.GetNoise2d(Translation.x, Translation.z - i) * 20, Translation.z - i));
}
Translation = curve.InterpolateBaked(32 * delta);
LookAt(Translation + curve.InterpolateBakedUpVector(16 * delta).Rotated(Vector3.Right, -(float)Math.PI / 2), Vector3.Up);
}
}
public void Initialise(WaveParams waveParams)
{
// Instantiate the wave segments, and set the initial wave rotation
WaveSegments = new WaveSegment[waveParams.SegmentCount];
var waveWidth = WaveSegment.SEGMENT_WIDTH * waveParams.SegmentCount;
var leftOrigin = new Vector3(-waveWidth / 2, 0, 0);
var leftControlPointInOrigin = new Vector3(-0.2f, 0, 0).Rotated(new Vector3(0, 0, 1), waveParams.LeftControlRotationRad);
var leftControlPointOutOrigin = new Vector3(0.2f, 0, 0).Rotated(new Vector3(0, 0, 1), waveParams.LeftControlRotationRad);
var rightOrigin = new Vector3(waveWidth / 2, 0, 0);
var rightControlPointInOrigin = new Vector3(0.2f, 0, 0).Rotated(new Vector3(0, 0, 1), waveParams.RightControlRotationRad);
var rightControlPointOutOrigin = new Vector3(-0.2f, 0, 0).Rotated(new Vector3(0, 0, 1), waveParams.RightControlRotationRad);
var curve = new Curve3D();
var gap = rightOrigin - leftOrigin;
// control point locations are relative to the curve point origin (i.e not global coordinates)
curve.AddPoint(leftOrigin,
SetControlPoint(gap.Length(), leftControlPointInOrigin),
SetControlPoint(gap.Length(), leftControlPointOutOrigin));
curve.AddPoint(rightOrigin,
SetControlPoint(gap.Length(), rightControlPointInOrigin),
SetControlPoint(gap.Length(), rightControlPointOutOrigin));
// instantiate wave segments
var segmentFraction = (float)1 / waveParams.SegmentCount;
for (var i = 0; i < waveParams.SegmentCount; i++)
{
var waveSegment = WaveSegmentScene.Instance() as WaveSegment;
// xOffset moves from leftOrigin to rightOrigin in a number of steps equal to the segment count
var xOffset = leftOrigin.x + (rightOrigin.x - leftOrigin.x) * (i * segmentFraction);
var yOffset = curve.Interpolate(0, i * segmentFraction + (segmentFraction / 2));
waveSegment.Translation = new Vector3(xOffset, yOffset.y, 0);
AddChild(waveSegment);
WaveSegments[i] = waveSegment;
}
Rotation = new Vector3(0, 0, waveParams.InitialRotationRad);
RotationRateRad = waveParams.RotationRateRad;
}
public void _CloseCurve()
{
Curve3D c = path.curve;
if (!IsInstanceValid(c))
{
return;
}
if (c.GetPointCount() < 2)
{
return;
}
c.AddPoint(c.GetPointPosition(0), c.GetPointIn(0), c.GetPointOut(0));
}
public override void _PhysicsProcess(float delta)
{
base._PhysicsProcess(delta);
var ribbonCurve = new Curve3D();
// based on the gap between the two controllers, the control points move further away from the origin as the controllers are moved apart
// without dynamically adjusting the control points, the curve would get straighter as the controllers moved apart.
var gapWidth = (RightController.GlobalTransform.origin - LeftController.GlobalTransform.origin).Length();
// control point locations are offset from the origin point (i.e not global coordinates)
ribbonCurve.AddPoint(LeftController.RibbonGlobalOrigin,
AdjustControlPoint(LeftController.ControlPointInOffset, gapWidth),
AdjustControlPoint(LeftController.ControlPointOutOffset, gapWidth));
ribbonCurve.AddPoint(RightController.RibbonGlobalOrigin,
AdjustControlPoint(RightController.ControlPointInOffset, gapWidth),
AdjustControlPoint(RightController.ControlPointOutOffset, gapWidth));
// figure out a vector at 90 degrees to origin and control point. Vector will be used to offset one side of the ribbon, and give it a consistent width and orientation
// need this for both controllers, and then gradually rotate from one to the other over the course of the ribbon length
// Curve points pass through the centre of the Ribbon, as it appears on-screen.
// To get the vertices to draw, need to offset from curvePoints for the front and back edges of the Ribbon, as below
RibbonPoints = ribbonCurve.Tessellate();
// will interpolate between these edges to give the ribbon a smooth "twist" over its length
var leftRibbonFrontEdgeOffset = LeftController.RibbonFrontEdgeOffset;
var leftRibbonBackEdgeOffset = LeftController.RibbonBackEdgeOffset;
var rightRibbonFrontEdgeOffset = RightController.RibbonFrontEdgeOffset;
var rightRibbonBackEdgeOffset = RightController.RibbonBackEdgeOffset;
var triStripPoints = new Vector3[RibbonPoints.Length * 2];
var curvePointLengthFloat = (float)RibbonPoints.Length;
for (var i = 0; i < RibbonPoints.Length; i++)
{
// Offset front and back from curvePoints, as curvePoints pass through the centre of the ribbon
var frontEdgePoint = RibbonPoints[i] + leftRibbonFrontEdgeOffset.LinearInterpolate(rightRibbonFrontEdgeOffset, i / curvePointLengthFloat);
var backEdgePoint = RibbonPoints[i] + leftRibbonBackEdgeOffset.LinearInterpolate(rightRibbonBackEdgeOffset, i / curvePointLengthFloat);
triStripPoints[i * 2] = frontEdgePoint;
triStripPoints[(i * 2) + 1] = backEdgePoint;
}
RibbonMesh.Clear(); // without Clear, triangles from previous loops accumulate on screen
RibbonMesh.Begin(Mesh.PrimitiveType.TriangleStrip);
for (var i = 0; i < triStripPoints.Length; i++)
{
// pass vertices to Normal function in anti-clockwise order
// this will vary depending on which side of the ribbon the vertex is added, hence the i % 2... condition. i.e.:
// - odd number: n, n-1, n-2
// - even number: n-2, n-1, n
var normal = i < 3 ? GetTriangleNormal(triStripPoints[2], triStripPoints[1], triStripPoints[0])
: (i % 2 == 0 ? GetTriangleNormal(triStripPoints[i], triStripPoints[i - 1], triStripPoints[i - 2])
: GetTriangleNormal(triStripPoints[i - 2], triStripPoints[i - 1], triStripPoints[i]));
RibbonMesh.SetNormal(normal);
RibbonMesh.AddVertex(triStripPoints[i]);
}
RibbonMesh.End();
}