/// <summary>
/// Displays a disc handle.
/// </summary>
/// <returns>
/// The disc radius.
/// </returns>
/// <param name="id">Control identifier.</param>
/// <param name="radius">Radius.</param>
/// <param name="origin">Origin.</param>
/// <param name="orientation">Orientation.</param>
/// <param name="label">Label.</param>
/// <param name="fillMode">Fill mode.</param>
private static float DoDisc(
int id, float radius, Vector3 origin, Quaternion orientation, string label, FillMode fillMode
)
{
// set handle matrix
Matrix4x4 oldMatrix = Handles.matrix;
Handles.matrix *= Matrix4x4.TRS(origin, orientation, Vector3.one);
// create handles
radius =
LinearHandles.Dot(id, val: radius, origin: Vector3.zero, direction: Vector3.forward, label: label);
radius = LinearHandles.Dot(id, val: radius, origin: Vector3.zero, direction: Vector3.right);
radius = LinearHandles.Dot(id, val: radius, origin: Vector3.zero, direction: Vector3.back);
radius = LinearHandles.Dot(id, val: radius, origin: Vector3.zero, direction: Vector3.left);
// draw disc
Color color = Handles.color;
SceneGUI.SetHandleAlpha(color.a * SceneGUI.LineAlphaScalar);
Handles.DrawWireDisc(Vector3.zero, Vector3.up, radius);
// optionally fill the disc
if (fillMode == FillMode.Solid)
{
SceneGUI.SetHandleAlpha(color.a * SceneGUI.FillAlphaScalar);
Handles.DrawSolidDisc(Vector3.zero, Vector3.up, radius);
}
// reset color
Handles.color = color;
// reset handle matrix
Handles.matrix = oldMatrix;
// return the result
return(radius);
}
/// <summary>
/// Displays the helix twist curve handles.
/// </summary>
/// <param name="baseId">Base identifier.</param>
/// <param name="helix">Helix.</param>
private static void DoHelixTwistHandles(int baseId, Helix helix)
{
float v;
AnimationCurve width = helix.Width;
AnimationCurve newTwist = new AnimationCurve(helix.Twist.keys);
Keyframe[] newKeys = newTwist.keys;
for (int i = 0; i < newKeys.Length; ++i)
{
// compute the disc center
Vector3 discCenter = Vector3.forward * newKeys[i].time * helix.Length;
v = newKeys[i].value;
// create an arc handle
float helixWidth = width.Evaluate(newKeys[i].time);
v = ArcHandles.SolidAngle(
ObjectX.GenerateHashCode(baseId, s_TwistHandleHash, i, 1),
v, discCenter,
Quaternion.LookRotation(Vector3.right, Vector3.forward),
helixWidth,
string.Format("{0:0} Degrees", v)
);
Handles.DrawWireDisc(discCenter, Vector3.forward, helixWidth);
newKeys[i].value = v;
// create time adjustment handles for intermediary keys
if (i == 0 || i == newKeys.Length - 1)
{
continue;
}
v = newKeys[i].time * helix.Length;
int id = ObjectX.GenerateHashCode(baseId, s_TwistHandleHash, i, 2);
v = LinearHandles.Cone(id, v, Vector3.zero, Vector3.forward, capScale: s_TimeAdjustHandleSize);
v = Mathf.Clamp(
v / helix.Length,
Mathf.Epsilon * 2f,
1f - Mathf.Epsilon * 2f
);
if (Mathf.Abs(v - newKeys[i].time) > s_RequiredMinHandleChange)
{
newKeys[i].time = v;
}
// TODO: Fix problems with keys moving over each other
}
newTwist.keys = newKeys;
helix.Twist = newTwist;
}
/// <summary>
/// Display a helix length handle.
/// </summary>
/// <param name="baseId">Base identifier.</param>
/// <param name="helix">Helix.</param>
private static void DoHelixLengthHandle(int baseId, Helix helix)
{
float length = helix.Length;
int id = ObjectX.GenerateHashCode(baseId, s_LengthHandleHash);
length = LinearHandles.Arrow(
id,
length,
Vector3.zero,
Vector3.forward,
string.Format("Length: {0:0.###}", length),
s_LengthHandleSize
);
if (Mathf.Abs(length - helix.Length) < s_RequiredMinHandleChange)
{
length = helix.Length;
}
helix.Length = length;
}
/// <summary>
/// Displays helix width handles.
/// </summary>
/// <param name="baseId">Base identifier.</param>
/// <param name="helix">Helix.</param>
private static void DoHelixWidthHandles(int baseId, Helix helix)
{
float v;
AnimationCurve twist = helix.Twist;
AnimationCurve newWidth = helix.Width;
Keyframe[] newKeys = newWidth.keys;
for (int i = 0; i < newKeys.Length; ++i)
{
// compute the disc center
Vector3 discCenter = Vector3.forward * newKeys[i].time * helix.Length;
// compute the angle of the handle around the length
Quaternion angle = Quaternion.AngleAxis(twist.Evaluate(newKeys[i].time), Vector3.forward);
// create a cone handle with a slight offset to not overlap the arc handle
v = newKeys[i].value + s_WidthHandleOffset;
int id = ObjectX.GenerateHashCode(baseId, s_WidthHandleHash, i, 1);
v = LinearHandles.Cone(id, v, discCenter, angle * Vector3.right, capScale: s_WidthHandleSize);
newKeys[i].value = v - s_WidthHandleOffset;
// create time adjustment handles for intermediary keys
if (i == 0 || i == newKeys.Length - 1)
{
continue;
}
v = newKeys[i].time * helix.Length;
id = ObjectX.GenerateHashCode(baseId, s_WidthHandleHash, i, 2);
v = LinearHandles.Cone(id, v, Vector3.zero, Vector3.forward, capScale: s_TimeAdjustHandleSize);
v = Mathf.Clamp(
v / helix.Length,
Mathf.Epsilon * 2f,
1f - Mathf.Epsilon * 2f
);
if (Mathf.Abs(v - newKeys[i].time) > s_RequiredMinHandleChange)
{
newKeys[i].time = v;
}
// TODO: Fix problems with keys moving over each other
}
newWidth.keys = newKeys;
helix.Width = newWidth;
}
/// <summary>
/// Displays the wedge radius handle.
/// </summary>
/// <returns>The handle's angle value.</returns>
/// <param name="id">Control identifier.</param>
/// <param name="radius">Radius.</param>
/// <param name="wedgeCenter">Wedge center.</param>
/// <param name="direction">Direction.</param>
/// <param name="label">Label.</param>
private static float WedgeRadiusHandle(
int id, float radius, Vector3 wedgeCenter, Vector3 direction, string label
)
{
return(LinearHandles.Cone(id, radius, wedgeCenter, direction, label, s_RadiusHandleScale));
}
/// <summary>
/// Displays a shape handle of the specified type.
/// </summary>
/// <remarks> If the user is holding Alt, the center will stay locked in place.</remarks>
/// <param name="baseId">Base identifier.</param>
/// <param name="size">Size.</param>
/// <param name="center">Center.</param>
/// <param name="orientation">Orientation.</param>
/// <param name="type">Type.</param>
private static void DoShapeHandle(
int baseId, ref Vector3 size, ref Vector3 center, Quaternion orientation, WireShapeType type
)
{
// set handle matrix
Matrix4x4 oldMatrix = Handles.matrix;
Handles.matrix *= Matrix4x4.TRS(center, orientation, Vector3.one);
// generate control Ids
int rightId = ObjectX.GenerateHashCode(baseId, (int)type, (int)EditAxis.X, 1);
int leftId = ObjectX.GenerateHashCode(baseId, (int)type, (int)EditAxis.X, 2);
int upId = ObjectX.GenerateHashCode(baseId, (int)type, (int)EditAxis.Y, 1);
int downId = ObjectX.GenerateHashCode(baseId, (int)type, (int)EditAxis.Y, 2);
int forwardId = ObjectX.GenerateHashCode(baseId, (int)type, (int)EditAxis.Z, 1);
int backId = ObjectX.GenerateHashCode(baseId, (int)type, (int)EditAxis.Z, 2);
int currentId = GUIUtility.hotControl;
int nearestId = HandleUtility.nearestControl;
// cache the center and size when a handle is clicked to use for shift/alt dragging
switch (Event.current.type)
{
case EventType.MouseDown:
if (
nearestId == leftId || nearestId == rightId ||
nearestId == upId || nearestId == downId ||
nearestId == forwardId || nearestId == backId
)
{
s_OnClickCenter[baseId] = center;
s_OnClickSize[baseId] = size;
}
break;
case EventType.MouseUp:
s_OnClickCenter.Remove(baseId);
s_OnClickSize.Remove(baseId);
currentId = 0;
break;
}
// make sure size is not negative on any dimension
size = new Vector3(Mathf.Max(0f, size.x), Mathf.Max(0f, size.y), Mathf.Max(0f, size.z));
// display right/left handles
float right = size.x * 0.5f;
float left = -size.x * 0.5f;
Vector3 offset = Handles.matrix.GetScale();
offset = new Vector3(
offset.x == 0f ? 0f : 1f / offset.x,
offset.y == 0f ? 0f : 1f / offset.y,
offset.z == 0f ? 0f : 1f / offset.z
);
offset *= s_HandleOffset;
right = LinearHandles.Dot(
rightId, val: right, origin: Vector3.right * offset.x, direction: Vector3.right
);
right = Mathf.Max(right, left);
left =
LinearHandles.Dot(leftId, val: left, origin: Vector3.left * offset.x, direction: Vector3.right);
left = Mathf.Min(right, left);
// display up/down handles
float up = size.y * 0.5f;
float down = -size.y * 0.5f;
up = LinearHandles.Dot(upId, val: up, origin: Vector3.up * offset.y, direction: Vector3.up);
up = Mathf.Max(up, down);
down = LinearHandles.Dot(downId, val: down, origin: Vector3.down * offset.y, direction: Vector3.up);
down = Mathf.Min(up, down);
// display forward/back handles
float forward = size.z * 0.5f;
float back = -size.z * 0.5f;
forward = LinearHandles.Dot(
forwardId, val: forward, origin: Vector3.forward * offset.z, direction: Vector3.forward
);
forward = Mathf.Max(forward, back);
back =
LinearHandles.Dot(backId, val: back, origin: Vector3.back * offset.z, direction: Vector3.forward);
back = Mathf.Min(forward, back);
// store which axes are being edited
EditAxis editAxis = EditAxis.None;
if (currentId == rightId || currentId == leftId)
{
editAxis = EditAxis.X;
}
else if (currentId == upId || currentId == downId)
{
editAxis = EditAxis.Y;
}
else if (currentId == forwardId || currentId == backId)
{
editAxis = EditAxis.Z;
}
// apply constraints to size based on shape type
size.x = Mathf.Max(0f, right - left);
size.y = Mathf.Max(0f, up - down);
size.z = Mathf.Max(0f, forward - back);
Vector3 deltaCenter = 0.5f * new Vector3(right + left, up + down, forward + back);
float delta;
switch (type)
{
case WireShapeType.Capsule:
switch (editAxis)
{
case EditAxis.X:
delta = Mathf.Min(size.x, size.y) - size.x;
size.x += delta;
size.z = size.x;
deltaCenter.x += delta * 0.5f;
break;
case EditAxis.Y:
delta = Mathf.Max(size.y, size.x, size.z) - size.y;
size.y += delta;
deltaCenter.y += delta * 0.5f;
break;
case EditAxis.Z:
delta = Mathf.Min(size.z, size.y) - size.z;
size.z += delta;
size.x = size.z;
deltaCenter.z += delta * 0.5f;
break;
}
break;
case WireShapeType.Cylinder:
switch (editAxis)
{
case EditAxis.X:
delta = Mathf.Min(size.x, size.y) - size.x;
size.x += delta;
size.z = size.x;
deltaCenter.x += delta * 0.5f;
break;
case EditAxis.Z:
delta = Mathf.Min(size.z, size.y) - size.z;
size.z += delta;
size.x = size.z;
deltaCenter.z += delta * 0.5f;
break;
}
break;
case WireShapeType.Sphere:
switch (editAxis)
{
case EditAxis.X:
size.y = size.z = size.x;
break;
case EditAxis.Y:
size.x = size.z = size.y;
break;
case EditAxis.Z:
size.x = size.y = size.z;
break;
}
break;
}
// apply new center
center += orientation * deltaCenter;
// scale uniformly using cached size if holding shift key
if (s_OnClickSize.ContainsKey(baseId) && Event.current.shift)
{
float scaleFactor = 1f;
switch (editAxis)
{
case EditAxis.X:
scaleFactor = s_OnClickSize[baseId].x > 0f ? size.x / s_OnClickSize[baseId].x : 0f;
break;
case EditAxis.Y:
scaleFactor = s_OnClickSize[baseId].y > 0f ? size.y / s_OnClickSize[baseId].y : 0f;
break;
case EditAxis.Z:
scaleFactor = s_OnClickSize[baseId].z > 0f ? size.z / s_OnClickSize[baseId].z : 0f;
break;
}
size = s_OnClickSize[baseId] * scaleFactor;
}
// use cached center if holding alt key
if (s_OnClickCenter.ContainsKey(baseId) && Event.current.alt)
{
center = s_OnClickCenter[baseId];
}
// draw wire shape
switch (type)
{
case WireShapeType.Box:
DrawWireBox(size);
break;
case WireShapeType.Capsule:
DrawWireCylinder(new CylinderProperties(height: size.y, radius: size.x * 0.5f), CylinderCap.Capsule);
break;
case WireShapeType.Cylinder:
DrawWireCylinder(new CylinderProperties(height: size.y, radius: size.x * 0.5f), CylinderCap.Cylinder);
break;
case WireShapeType.Sphere:
float radius = size.x * 0.5f;
Handles.DrawWireDisc(Vector3.zero, Vector3.right, radius);
Handles.DrawWireDisc(Vector3.zero, Vector3.up, radius);
Handles.DrawWireDisc(Vector3.zero, Vector3.forward, radius);
// TODO: get this working in non-identity orientations
// Vector3 nml = Handles.matrix.MultiplyPoint(Vector3.zero) - Camera.current.transform.position;
// float sqrMagRecip = 1f / nml.sqrMagnitude;
// float sqrRadius = radius * radius;
// radius = Mathf.Sqrt(sqrRadius - (sqrRadius * sqrRadius * sqrMagRecip));
// Handles.DrawWireDisc(
// Vector3.zero - sqrRadius * nml * sqrMagRecip, Handles.matrix.inverse.MultiplyVector(nml), radius
// );
break;
}
// reset handle matrix
Handles.matrix = oldMatrix;
}