internal static Vector3 DoScaleHandle(ScaleHandleIds ids, Vector3 scale, Vector3 position, Quaternion rotation, float handleSize, ScaleHandleParam param)
{
// 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 isDisabled = !GUI.enabled;
var isHot = ids.Has(GUIUtility.hotControl);
var axisOffset = param.axisOffset;
var axisLineScale = param.axisLineScale;
// When an axis is hot, draw the line from the center to the handle
// So ignore the offset
if (isHot)
{
axisLineScale += axisOffset;
axisOffset = Vector3.zero;
}
var isCenterIsHot = ids.xyz == GUIUtility.hotControl;
switch (Event.current.type)
{
case EventType.MouseDown:
s_InitialScale = scale;
break;
}
for (var i = 0; i < 3; ++i)
{
if (!param.ShouldShow(i))
{
continue;
}
if (!currentlyDragging)
{
switch (param.orientation)
{
case ScaleHandleParam.Orientation.Signed:
s_DoScaleHandle_AxisHandlesOctant[i] = 1;
break;
case ScaleHandleParam.Orientation.Camera:
s_DoScaleHandle_AxisHandlesOctant[i] = viewVectorDrawSpace[i] > 0.01f ? -1 : 1;
break;
}
}
var id = ids[i];
var isThisAxisHot = isHot && id == GUIUtility.hotControl;
var axisDir = GetAxisVector(i);
var axisColor = GetColorByAxis(i);
var offset = axisOffset[i];
var cameraLerp = id == GUIUtility.hotControl ? 0 : GetCameraViewLerpForWorldAxis(viewVectorDrawSpace, axisDir);
// If we are here and is hot, then this axis is hot and must be opaque
cameraLerp = isHot ? 0 : cameraLerp;
color = isDisabled ? Color.Lerp(axisColor, staticColor, staticBlend) : axisColor;
axisDir *= s_DoScaleHandle_AxisHandlesOctant[i];
if (cameraLerp <= kCameraViewThreshold)
{
color = Color.Lerp(color, Color.clear, cameraLerp);
if (isHot && !isThisAxisHot)
{
color = s_DisabledHandleColor;
}
if (isCenterIsHot)
{
color = selectedColor;
}
color = ToActiveColorSpace(color);
scale[i] = UnityEditorInternal.SliderScale.DoAxis(
id,
scale[i],
position,
rotation * axisDir,
rotation,
handleSize * param.axisSize[i],
EditorSnapSettings.scale,
offset,
axisLineScale[i]);
}
}
if (param.ShouldShow(ScaleHandleParam.Handle.XYZ) && (isHot && ids.xyz == GUIUtility.hotControl || !isHot))
{
color = ToActiveColorSpace(centerColor);
EditorGUI.BeginChangeCheck();
var s = ScaleValueHandle(ids.xyz, scale.x, position, rotation, handleSize * param.xyzSize, CubeHandleCap, EditorSnapSettings.scale);
if (EditorGUI.EndChangeCheck())
{
scale = s_InitialScale * s;
}
}
return(scale);
}
public bool Has(int id)
{
return(position.Has(id) ||
rotation.Has(id) ||
scale.Has(id));
}