internal static Vector3 DoPositionHandle(PositionHandleIds ids, Vector3 position, Quaternion rotation)
{
Event evt = Event.current;
switch (evt.type)
{
case EventType.KeyDown:
// Holding 'V' turns on the FreeMove transform gizmo and enables vertex snapping.
if (evt.keyCode == Tools.vertexDraggingShortcutEvent.keyCode &&
evt.modifiers == Tools.vertexDraggingShortcutEvent.modifiers &&
!currentlyDragging)
{
s_FreeMoveMode = true;
}
break;
case EventType.KeyUp:
// If the user has released the 'V' key, then rendering the transform gizmo
// one last time with Free Move mode off is technically incorrect since it can
// add one additional frame of input with FreeMove enabled, but the
// implementation is a fair bit simpler this way.
// Basic idea: Leave this call above the 'if' statement.
position = DoPositionHandle_Internal(ids, position, rotation, PositionHandleParam.DefaultHandle);
if (evt.keyCode == Tools.vertexDraggingShortcutEvent.keyCode &&
evt.modifiers == Tools.vertexDraggingShortcutEvent.modifiers &&
!evt.shift && !currentlyDragging)
{
s_FreeMoveMode = false;
}
return(position);
case EventType.Layout:
if (Tools.vertexDragging && !s_FreeMoveMode)
{
s_FreeMoveMode = true;
}
if (!currentlyDragging && !Tools.vertexDragging)
{
s_FreeMoveMode = evt.shift;
}
break;
}
var param = s_FreeMoveMode ? PositionHandleParam.DefaultFreeMoveHandle : PositionHandleParam.DefaultHandle;
return(DoPositionHandle_Internal(ids, position, rotation, param));
}
static Vector3 DoPositionHandle_Internal(PositionHandleIds ids, Vector3 position, Quaternion rotation, PositionHandleParam param)
{
Color temp = color;
bool isDisabled = !GUI.enabled;
// Calculate the camera view vector in Handle draw space
// this handle the case where the matrix is skewed
var handlePosition = matrix.MultiplyPoint3x4(position);
var drawToWorldMatrix = matrix * Matrix4x4.TRS(position, rotation, Vector3.one);
var invDrawToWorldMatrix = drawToWorldMatrix.inverse;
var viewVectorDrawSpace = GetCameraViewFrom(handlePosition, invDrawToWorldMatrix);
var size = HandleUtility.GetHandleSize(position);
// Calculate per axis camera lerp
for (var i = 0; i < 3; ++i)
{
s_DoPositionHandle_Internal_CameraViewLerp[i] = ids[i] == GUIUtility.hotControl ? 0 : GetCameraViewLerpForWorldAxis(viewVectorDrawSpace, GetAxisVector(i));
}
// Calculate per plane camera lerp (xy, yz, xz)
for (var i = 0; i < 3; ++i)
{
s_DoPositionHandle_Internal_CameraViewLerp[3 + i] = Mathf.Max(s_DoPositionHandle_Internal_CameraViewLerp[i], s_DoPositionHandle_Internal_CameraViewLerp[(i + 1) % 3]);
}
var isHot = ids.Has(GUIUtility.hotControl);
var axisOffset = param.axisOffset;
var planeOffset = param.planeOffset;
if (isHot)
{
axisOffset = Vector3.zero;
planeOffset = Vector3.zero;
}
// Draw plane handles (xy, yz, xz)
var planeSize = isHot ? param.planeSize + param.planeOffset : param.planeSize;
for (var i = 0; i < 3; ++i)
{
if (!param.ShouldShow(3 + i) || isHot && ids[3 + i] != GUIUtility.hotControl)
{
continue;
}
var cameraLerp = isHot ? 0 : s_DoPositionHandle_Internal_CameraViewLerp[3 + i];
if (cameraLerp <= kCameraViewThreshold)
{
var offset = planeOffset * size;
offset[s_DoPositionHandle_Internal_PrevIndex[i]] = 0;
var planarSize = Mathf.Max(planeSize[i], planeSize[s_DoPositionHandle_Internal_NextIndex[i]]);
position = DoPlanarHandle(ids[3 + i], i, position, offset, rotation, size * planarSize, cameraLerp, viewVectorDrawSpace, param.planeOrientation);
}
}
// Draw axis sliders
// Draw last to have priority over the planes
for (var i = 0; i < 3; ++i)
{
if (!param.ShouldShow(i))
{
continue;
}
if (!currentlyDragging)
{
switch (param.axesOrientation)
{
case PositionHandleParam.Orientation.Camera:
s_DoPositionHandle_AxisHandlesOctant[i] = viewVectorDrawSpace[i] > 0.01f ? -1 : 1;
break;
case PositionHandleParam.Orientation.Signed:
s_DoPositionHandle_AxisHandlesOctant[i] = 1;
break;
}
}
var isThisAxisHot = isHot && ids[i] == GUIUtility.hotControl;
var axisColor = GetColorByAxis(i);
color = isDisabled ? Color.Lerp(axisColor, staticColor, staticBlend) : axisColor;
GUI.SetNextControlName(s_DoPositionHandle_Internal_AxisNames[i]);
// if we are hot here, the hot handle must be opaque
var cameraLerp = isThisAxisHot ? 0 : s_DoPositionHandle_Internal_CameraViewLerp[i];
if (cameraLerp <= kCameraViewThreshold)
{
color = Color.Lerp(color, Color.clear, cameraLerp);
var axisVector = GetAxisVector(i);
var dir = rotation * axisVector;
var offset = dir * axisOffset[i] * size;
dir *= s_DoPositionHandle_AxisHandlesOctant[i];
offset *= s_DoPositionHandle_AxisHandlesOctant[i];
if (isHot && !isThisAxisHot)
{
color = s_DisabledHandleColor;
}
// A plane with this axis is hot
if (isHot && (ids[s_DoPositionHandle_Internal_PrevPlaneIndex[i]] == GUIUtility.hotControl || ids[i + 3] == GUIUtility.hotControl))
{
color = selectedColor;
}
color = ToActiveColorSpace(color);
s_DoPositionHandle_ArrowCapConeOffset = isHot
? rotation * Vector3.Scale(Vector3.Scale(axisVector, param.axisOffset), s_DoPositionHandle_AxisHandlesOctant)
: Vector3.zero;
position = Slider(ids[i], position, offset, dir, size * param.axisSize[i], DoPositionHandle_ArrowCap, GridSnapping.active ? 0f : EditorSnapSettings.move[i]);
}
}
VertexSnapping.HandleMouseMove(ids.xyz);
if (param.ShouldShow(PositionHandleParam.Handle.XYZ) && (isHot && ids.xyz == GUIUtility.hotControl || !isHot))
{
color = ToActiveColorSpace(centerColor);
GUI.SetNextControlName("FreeMoveAxis");
position = FreeMoveHandle(ids.xyz, position, rotation, size * kFreeMoveHandleSizeFactor, GridSnapping.active ? Vector3.zero : EditorSnapSettings.move, RectangleHandleCap);
}
if (GridSnapping.active)
{
position = GridSnapping.Snap(position);
}
color = temp;
return(position);
}
public TransformHandleIds(PositionHandleIds position, RotationHandleIds rotation, ScaleHandleIds scale)
{
this.position = position;
this.rotation = rotation;
this.scale = scale;
}
