lecture 2 graphics

Feb 3 -Graphics

note that the basic operations ( move, uniform scale, rotation) preserve shape (angles)

make editable so can manipulate faces and vertices--right mouse click---> make editable (also in mesh-->conversion-->make editable)

click on vertex manipulation in vertical command palette
Work in perspective view and in selection tool on horizontal command palette hold down and make it marquee selection. Do a Marquee selection around entire box.

you probably wont get everything so use the view rotate tool to find points unselected then shift select them
you can push o or option--o to center points selected if you lose the object

or look under View in the perspective palette. You can undo what you have done to view (perspective camera) or frame objects selected etc.

Now do all the transformation of object and you will see that you need only transform vertices to get object transformed
Pick vertices for a face and transform-- new shapes but face remains intact

Go to File-->New and make new cube or pick cube in object manager and press delete

Unfortunately in cinema-4d you must be in point or edge mode to set to world coordinates.
Select all the edges of cube or all the points by being in the appropriate mode on the side command palette

In the Attribute View change the Axis to World
Now scale in the x direction
Change axis to object and rotate till get back with base and top of rectangle you see parallel to x axis

I think there is a problem in cinema-4d interface --- the object axis does not seem to rotate back. You can rectify this by manually putting it back with axis tool.

If you first scale in world coordinates, then rotate and then rotate back what do you get?
These transformations are not commutative

Go to curve box in horizontal command palette--> Bezier Curve (Spline)
If you just click points you get polygonal curves
If you hold down mouse button and drag you can determine direction(tangent) curve will go at each point and get good curves. Do it with two points. Push return.
This is a Bezier Curve
You can add points as you go making tangents you want
you are getting a piecewise Bezier curve
If you want to see tangents to modify you click on a point you see when in point command mode. You will then see tangent handles and can move the tangents with both tangent sides staying together . If you hold down shift you can move them independently. You should be in move command mode. You move point in any direction by just moving mouse with left button down when off the model.
If you want to add points you go into the point mode on the vertical palette and chose the move tool on the horizontal palette and then command left click outside of curve to add points there and command left click on the curve to add points there.

pre-made under cube on horizontal palette-- platonic -- polygonal surfaces vertices,edges,faces (planar)
polygonal manipulations

make an outline of vase in front window around y axis-- note if you hold down shift before you put down first point you can constrain tangent to be vertical. Later if you pick points you can move one side of tangent independently from another. Press return.
Go to Lathe object by holding down left mouse on symbol to right of curves on horizontal command palette
In object manage drag spline under Lathe Transformation
Try other Transformations-- extrude etc. read help files