###### Descriptions and Examples for the POV-Ray Raytracerby Friedrich A. Lohmüller     3D Animations with POV-Ray         Some basics and examples on animations.
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3D Animation Tutorial
Index of Content
0. Basic Knowledge
1. Basic Example
2. Example 2
3. Images to Animated Gif
4. From Images to Video
5. Basic Terms
6. Animation Commands
I. Cyclic Animations
1. Rotating Objects
1.2. Planets in Orbit
1.3. Clock Animation
> 2. Rotating Camera
2.1. Straight Moving Camera
3. Western Wheel
Problem
3.1. Rolling Wheels
4. Gears
4.1. Roller Chain
4.2. Bike Chain
5. Swinging Pendulum
5.2: Rock the Rocker
6. Spiral Pendulum
7. Coupling Rods
7.1. Connecting Rods
8. Psychedelic + Op-Art
9. Counters + Countdowns
10. Folding of a Cube
II. Non-linear Movements
1.0 Speed Up/Slow Down 1
1.1 Speed Up/Slow Down 2
2. Fall + Bounce
3. Acceleration by
physical Formulas
4. Speed Controll by
Spline Functions
III. Animation Paths
with Spline Curves
1. Spline Curves
2. Closed Splines
3. Animation Paths

 Rotating Camera  Cyclic animation of the camera.

How to make an animated camera
We can animate the camera location as well as the look_at point and the angle of view!

Example: Rotating Camera
 ```// the rotating camera: ---------- camera { angle 35 location <3.0 , 1.0 ,-20.0> right x*image_width/image_height look_at <-1.0 , 3.5, 5.0> rotate <0,-360*(clock+0.10),0> //---------------------- end of camera ```

Scene description for POV-Ray 3.6 / 3.7:
"cam_rot1.ini" and
"cam_rot1.pov"

With some ups and downs:
 ```#declare Jump_Start = 0.5; #declare Jump_Height = 7; #if (clock < Jump_Start ) #declare Camera_Y = 1.00; #else #declare Camera_Y = 1.00 + Jump_Height* 0.5*(1-cos(4*pi*(clock-Jump_Start))); #end camera { angle 38 location <3,Camera_Y,-20> right x*image_width/image_height look_at <-3,3,5> rotate<0,-360*(clock+0.1),0> } //------------------- end of camera```

Attention: Don't look vertically with the camera!
Don't put 'location' right over or below 'look_at'!
In such positions the direction of the camera view
is flipping uncontrollable!

For another interesting examples on the animation of camera take a look at the POV-Ray subdirectory "scenes\animationamera2".
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