Evil Blink 1 EVIL BLINK

Transcription

1 1 EVIL BLINK Houdini Training V4.0 Side Effects Software

2 1.1 CREATING THE EYE SOCKET 1. Launch Houdini 2. From the desktop selector button located at the top of the interface, select the Training desktop. 3. Select the sky, logo and ground objects, and delete them. 4. From the list of generator object located at the top of the Network editor, place a new Geometry object into the network editor. Rename it to be eyes. 5. Enter into the eyes SOP editor, by either: A[ on the object tile, or select it, and pressing the R key. Delete the default File SOP *** Ensure the viewport display mode is set to Display SOP and as you append each SOP, toggle it s display flag On. Display SOP Current SOP 2 Side Effects Software 1999 Houdini Training V4.0

3 6. From the list of Generator SOPs located at the top of the Network editor, place a sphere SOP into the Network editor. Working with its parameters: Change its Primitive Type to be NURBS. Change its Orientation to be on the X axis. Modify if Radius to be \ on the output connector of the sphere SOP, and from the Filters menu, select a transform SOP, and place it into the Network editor. Toggle on its Display and Render flags Change the Rotate X value to be Append a carve SOP to the transform SOP. Toggle on its Display and Render flags. Change the First U parameter to be Toggle on the Second U option, and Change its value to be While displaying the output of the carve SOP, select the transform SOP and adjust the rotate parameter for the X axis to a value of Append a twist SOP to the carve SOP. Toggle on its Display and Render flags. In the Strength field, increase it to 18. This simply gives the eyes some character and makes them look a little more sinister. 11. Append a transform SOP after the twist SOP. Translate -1.2 units in X. Rotate on Z -10 degrees. 12. Append a copy SOP after the transform SOP. Toggle on its display and render flags. Increase the # of copies to 2. Houdini Training V4.0 Side Effects Software

4 Change the Scale in X to be -1. # of copies 2 Your network so far Scale -1 in X 13. Home the viewport window. 14. Append a primitive SOP to the copy SOP. Open the Attributes folder. In the Color field, change it from Keep Color to Add Color. \ on the Color name field, and select Delete Channels from the pop-up menu. In the Color field adjust the parameters to be Side Effects Software 1999 Houdini Training V4.0

5 1.2 ANIMATING THE CARVE SOP TO CREATE A BLINK 1. While displaying the output of the Primitive SOP, select the Carve SOP to display its associated parameters. 2. Enter the following expression into the First U parameter field. abs(cos($f*5))*.2 3. Playback the animation at this point and although the eyes will blink, there is an obvious problem. Essentially the blink is backwards. Or is it. It simply depends on the effect you want to achieve. However, assuming that you want the upper eyelid animated rather than the lower eyelid: 4. Select the xform1 SOP to display its associated parameters and: Rotate the geometry about the Z axes. (set the Z Rotate parameter to 180) The upper eyelid now closes down as you might have expected. 1.3 CREATING THE EYE BALL 1. Select the Copy1 SOP ensuring it is the only currently active SOP. 2. Using the \ click on the SOP s pictorial icon and choose the option Select Inputs from the associated pop-up menu. At this point all SOPs in the chain above the Copy SOP, and the copy SOP itself, should be active. 3. Use the Ac keyboard combination to copy the selected SOPs. 4. Use the Av keyboard combination to paste the SOPs. Move this new chain of SOPs over to the right of the current chain of SOPs. Houdini Training V4.0 Side Effects Software

6 5. Select the Carve2 SOP to display its associated parameters and: Toggle the Keep Inside option Off. Toggle the Keep Outside option On. You now have the opposite Carve geometry which represents the eye balls themselves. 6. While the mouse pointer is located over the Network editor, press the T key to bring up the SOP selection menu. From the Filters menu, select, and place a merge SOP beneath the two SOP networks. Pipe the Primitive SOP into the Merge1 SOP. Pipe the Copy2 SOP into the Merge SOP Toggle the Merge SOPs display flag On. 1. Play back the animation at this point. (Try it is shaded mode) 2. Return to frame CREATING THE PUPILS The SOP chain that you copied earlier is still in the copy buffer, therefore: 1. Use the Av keyboard combination to copy this SOP chain once again and move the chain over to the right of the last chain. 2. Toggle the Copy3 SOPs display flag On. 3. Select the Carve3 SOP to display its associated parameters and: Toggle the Keep Inside option Off. Toggle the Keep Outside option On. 6 Side Effects Software 1999 Houdini Training V4.0

7 4. Using the \ insert another Carve SOP between the existing Carve3 SOP and the Twist SOP. Working with this new Carve SOP: Toggle the First U option Off Toggle the First V option On and set the parameter to a value of Toggle the Second V option On and set the parameter to value of Connect the output of the Copy3 SOP (the last SOP in this chain) to the Merge SOP for final display and toggle the display into Shaded Mode. 6. Insert a Primitive SOP between the Copy3 SOP and the Merge SOP and working with the Primitive SOP parameters: Open the Attributes folder. Set the option to Add Color. Delete the current Color Attribute channel. Set the color parameters to to create a set of black pupils You will likely encounter some bleed through shading of the eyeball surface on the pupil surface. This is due to the fact that both of these surface currently occupy the same shading space. To correct this, the pupil surface must be offset very slightly from the eye ball surface. To do this easily: 7. Return to the transform folder of the primitive SOP: Toggle the Do Transformation button On. Set the Translate parameter for the Z axis to a value of Don t forget to save your file if you have not been doing so. Houdini Training V4.0 Side Effects Software