Differences

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--- blender [2023/10/31 22:47] – jhagstrand
+++ blender [2023/11/01 00:30] (current) – [Terms] jhagstrand
@@ Line 224: / Line 224: @@
 ^ noun       ^ applies to ^ terms ^ changes what ^
-| navigation | world | pan, roll, zoom | my view of the world |
+| navigation | world | pan, roll, orbit, zoom | my point of view |
 | transformation | object or selection | move, rotate, scale | the model |
-D Viewport - The editor type we use to do 3D modeling.  Provides your viewport into the world.
+D Viewport - The editor type we use to do 3D modeling.  Provides your view into the world.
 [[https://docs.blender.org/manual/en/latest/editors/3dview/index.html# | 3D Viewport]]
-gizmo - a UI devices that allows navigation or transformation with the mouse.
+gizmo - a UI device that allows navigation or transformation with the mouse.
+A gizmo always has three color-coded axes: X (red), Y (green), and Z (blue).
+[[https://docs.blender.org/manual/en/latest/editors/3dview/display/gizmo.html | Gizmo]]
   * Navigation Gizmo - applies to the world.  Found in upper-right of viewport.
-  * Transformation Gizmo - applies to object or selection.  Appears at the pivot point.
+  * Transformation Gizmo - applies to object or selection.  Appears at the pivot point, aligned with the transform orientation.
 pivot point -
-origin -
-  * world origin -
-  * local origin -
-normal - the direction of a face.
-D Cursor - A singleton object that can be placed somewhere in the world.
-Note that the terms "origin" and "gizmo" can apply to the world, to an object, or to a selection of objects, faces, edges, vertices, or whatever.
-Navigate vs Transform
-navigate - pan, roll, or zoom the world within the viewport.
-transform - move, rotate, scale an object or a selection.
-Origin
-world origin - the point at world coordinates 0,0,0.  Constant.
-D Cursor - a singleton object with location and rotation.  By default it is the world origin.
-Set it using the toolbar or the Snap menu via left-click or shift-S.  The 3D Cursor has multiple purposes.
- It defines where newly added objects are placed.  It can be used to manually position and orient the transform gizmo (see Pivot Point and Transform Orientation).
-gizmo - A UI element.  A gizmo always has three color-coded axes: X (red), Y (green), and Z (blue).
-[[https://docs.blender.org/manual/en/latest/editors/3dview/display/gizmo.html | Gizmo]]
-Navigation Gizmo - upper-right icon with circles and xyz axes.
-Allows you to pan, roll, or zoom the world within the viewport.
-Transform Gizmo - Allows you to move, rotate, or scale the selected object(s) with the mouse.
-=== Navigate ===
-=== Object Terms ===
-object origin, local origin, origin point - bounding box center of the object.
-pivot point
   * for one object, or for a selection of objects, or in edit mode for a group of selected vertices
   * determines the locaion of the "object gizmo", and thus is the center of transformations
@@ Line 282: / Line 245: @@
     * center of geometry
-transform orientation
+normal - the line perpendicular to a face.
-object gizmos - specific to the active object and the active tool.
+origin -
+  * world origin - the point at world coordinates 0,0,0.  Constant.
+  * local origin - average center of all selected objects of vertices.
+  * object origin - local origin of a single selected object.  By default is the bounding box center of the object.  Can be moved by setting it to the 3D cursor.
+D Cursor - a singleton object with location and rotation.  By default it is at the world origin.
+Set it using the toolbar or the Snap menu via left-click or shift-S.  The 3D Cursor has multiple purposes.
+ It defines where newly added objects are placed.  It can be used to manually position and orient the transform gizmo.
-normal
+transform orientation - the orientation of the Object Gizmo.  Can be selected from the 3D Viewport Header menu.
+  * global - aligned with the world space
+  * local - aligned with the active object's orientation
+  * normal - fancy. normally equivalent to local.
+  * gimbal - fancy.  Involving Euler math.
+  * view - aligned with your viewpoint as you orbit.
+  * cursor - aligned with the 3D cursor.
+  * parent - aligned with the parent.
-gimbal
+rotation mode - fancy.  involving Euler math.
-rotation mode
+Note: object origin vs pivot point vs transform gizmo
+  * A transformation requires a pivot point and a transform orientation.
+  * if a single object is selected, the pivot point is the object origin.  The object origin is by default the bounding box center, but it can be moved using the 3D cursor.
+  * If multiple objects or vertices are selected, the pivot point is at the average point of the selected objects.
+  * The transform orientation can be selected on the 3D viewport header, see above.
+  * The transform gizmo visualizes the pivot point and the transform orientation.
+==== How to navigate ====
 Views:
   * orthographic (flat):  top, bottom, front, back, right, or left.
-  * perspective (3D, having depth)
+  * perspective (having depth)
 To switch views:
@@ Line 308: / Line 291: @@
   * use Object Mode - View menu: pan, orbit, roll, zoom
-=== How to transform an object ===
+==== How to transform an object ====
 t toolbar on the left, toggle on and off\\
@@ Line 328: / Line 311: @@
 shift+A: add an object primitive
-==== render engine ====
+==== Render Engine ====
 Cycles - slow, ray-traced, unbiased, for high-end movies