void DrawCubicBezier(int numSamples, float width, Color color)
{
var prev = a;
for (var i = 0; i < numSamples; i++)
{
var progress = (float)i / (numSamples - 1);
var ab = Vector2.Lerp(a, b, progress);
var bd = Vector2.Lerp(b, d, progress);
var abbd = Vector2.Lerp(ab, bd, progress);
GeometryDraw.DrawLine(gameObject, new[] { prev, abbd }, width, color);
GeometryDraw.DrawCircle(gameObject, abbd.x, abbd.y, width / 2, color, 0, .2f);
prev = abbd;
}
}
void Update()
{
if (animateProgress)
{
time += Time.deltaTime * animationSpeed * animationSpeed;
progress = Mathf.PingPong(time, 1);
}
var ad = Vector2.Lerp(a, d, progress);
var ab = Vector2.Lerp(a, b, progress);
var bc = Vector2.Lerp(b, c, progress);
var cd = Vector2.Lerp(c, d, progress);
var bd = Vector2.Lerp(b, d, progress);
var abbc = Vector2.Lerp(ab, bc, progress);
var bccd = Vector2.Lerp(bc, cd, progress);
var abbd = Vector2.Lerp(ab, bd, progress);
var abbcbccd = Vector2.Lerp(abbc, bccd, progress);
GeometryDraw.Clear(gameObject);
GeometryDraw.DrawCircle(gameObject, a.x, a.y, ColorSettings.instance.bezierHandleDotSize, ColorSettings.instance.bezierPrimaryLine, 0, 1f);
GeometryDraw.DrawCircle(gameObject, d.x, d.y, ColorSettings.instance.bezierHandleDotSize, ColorSettings.instance.bezierPrimaryLine, 0, 1f);
// draw simple lerp line
if (drawSimpleLine)
{
GeometryDraw.DrawLine(gameObject, new [] { a, d }, ColorSettings.instance.bezierSimpleLerpThickness, ColorSettings.instance.bezierPrimaryLine);
}
// draw simple lerp dot
if (drawSimpleLerp)
{
GeometryDraw.DrawCircle(gameObject, ad.x, ad.y, ColorSettings.instance.bezierSimpleLerpDotSize, ColorSettings.instance.bezierHandle, 0, 1f);
}
if (drawCubicHandle)
{
GeometryDraw.DrawCircle(gameObject, b.x, b.y, ColorSettings.instance.bezierHandleDotSize, ColorSettings.instance.bezierSecondaryHandle, 0, 1f);
}
if (drawCubicOutline)
{
GeometryDraw.DrawLine(gameObject, new[] { a, b }, ColorSettings.instance.bezierSecondaryLineThickness, ColorSettings.instance.bezierSecondaryLine, 1);
GeometryDraw.DrawLine(gameObject, new[] { b, d }, ColorSettings.instance.bezierSecondaryLineThickness, ColorSettings.instance.bezierSecondaryLine, 1);
}
if (drawCubicLerps)
{
GeometryDraw.DrawCircle(gameObject, ab.x, ab.y, ColorSettings.instance.bezierHandleDotSize, ColorSettings.instance.bezierTertiaryLine, 0, 1f);
GeometryDraw.DrawCircle(gameObject, bd.x, bd.y, ColorSettings.instance.bezierHandleDotSize, ColorSettings.instance.bezierTertiaryLine, 0, 1f);
}
if (drawCubicLines)
{
GeometryDraw.DrawLine(gameObject, new[] { ab, bd }, ColorSettings.instance.bezierTertiaryLineThickness, ColorSettings.instance.bezierTertiaryLine);
}
if (drawCubicCurveDot)
{
GeometryDraw.DrawCircle(gameObject, abbd.x, abbd.y, .1f, ColorSettings.instance.bezierCurve, -1f, 1f);
}
if (drawCubicCurve)
{
DrawCubicBezier(64, ColorSettings.instance.bezierCurveThickness, ColorSettings.instance.bezierCurveHandle);
}
// draw handles
if (drawQuadraticHandles)
{
GeometryDraw.DrawCircle(gameObject, b.x, b.y, ColorSettings.instance.bezierHandleDotSize, ColorSettings.instance.bezierSecondaryHandle, 0, 1f);
GeometryDraw.DrawCircle(gameObject, c.x, c.y, ColorSettings.instance.bezierHandleDotSize, ColorSettings.instance.bezierSecondaryHandle, 0, 1f);
}
// draw bezier lines
if (drawQuadraticOutline)
{
GeometryDraw.DrawLine(gameObject, new[] { a, b }, ColorSettings.instance.bezierSecondaryLineThickness, ColorSettings.instance.bezierSecondaryLine, 1);
GeometryDraw.DrawLine(gameObject, new[] { b, c }, ColorSettings.instance.bezierSecondaryLineThickness, ColorSettings.instance.bezierSecondaryLine, 1);
GeometryDraw.DrawLine(gameObject, new[] { c, d }, ColorSettings.instance.bezierSecondaryLineThickness, ColorSettings.instance.bezierSecondaryLine, 1);
}
if (drawQuadraticLerps)
{
GeometryDraw.DrawCircle(gameObject, ab.x, ab.y, ColorSettings.instance.bezierHandleDotSize, ColorSettings.instance.bezierTertiaryLine, 0, 1f);
GeometryDraw.DrawCircle(gameObject, bc.x, bc.y, ColorSettings.instance.bezierHandleDotSize, ColorSettings.instance.bezierTertiaryLine, 0, 1f);
GeometryDraw.DrawCircle(gameObject, cd.x, cd.y, ColorSettings.instance.bezierHandleDotSize, ColorSettings.instance.bezierTertiaryLine, 0, 1f);
}
// draw bezier interpolation lines
if (drawQuadraticSecondOrderLines)
{
GeometryDraw.DrawLine(gameObject, new[] { ab, bc }, ColorSettings.instance.bezierTertiaryLineThickness, ColorSettings.instance.bezierTertiaryLine);
GeometryDraw.DrawLine(gameObject, new[] { bc, cd }, ColorSettings.instance.bezierTertiaryLineThickness, ColorSettings.instance.bezierTertiaryLine);
}
if (drawQuadraticThirdOrderHandles)
{
GeometryDraw.DrawCircle(gameObject, abbc.x, abbc.y, ColorSettings.instance.bezierHandleDotSize, ColorSettings.instance.bezierQuaternaryLine, 0, 1f);
GeometryDraw.DrawCircle(gameObject, bccd.x, bccd.y, ColorSettings.instance.bezierHandleDotSize, ColorSettings.instance.bezierQuaternaryLine, 0, 1f);
}
if (drawQuadraticThirdOrderLines)
{
GeometryDraw.DrawLine(gameObject, new[] { abbc, bccd }, ColorSettings.instance.bezierQuarternaryLineThickness, ColorSettings.instance.bezierQuaternaryLine);
}
// draw bezier dot
if (drawQuadraticCurveDot)
{
GeometryDraw.DrawCircle(gameObject, abbcbccd.x, abbcbccd.y, .1f, ColorSettings.instance.bezierCurve, -1, 1f);
}
// draw bezier curve
if (drawQuadraticCurve)
{
DrawQuadraticBezier(64, ColorSettings.instance.bezierCurveThickness, ColorSettings.instance.bezierCurveHandle);
}
GeometryDraw.Finalize(gameObject);
if (Input.GetMouseButtonDown(0))
{
GrabHandle();
}
else if (grabbedHandleIndex >= 0 && Input.GetMouseButton(0))
{
MoveHandle();
}
else
{
ReleaseHandle();
}
}