###### Descriptions and Examples for the POV-Ray Raytracerby Friedrich A. Lohmüller     POV-Ray Examples - How To Make Objects for POV-Ray
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Home
- POV-Ray Tutorial
- POV-Ray Examples
Index of Content
- Geometry
- Architecture
- Engineering
- Pylons
- Railing
- Bridge
- Tubes
- Tube Fork
- Tube Stopcock
- Chain
- Coil of Wire
- Torpedo
- Cruise Missile
- Rocket
- Wheel
- Truck
- Propeller
- 2. Motion Blur
- 3. Assembly
- Airplanes
- Canoe
- Guitar Body
- 7-Segment Display
- Ribbon Cable
- Cable Harness

Propeller

###### How to simulate the motion blur of rotating blades.

Simulation of the motion blur of rotating blades
To acchieve this effect we have to use a thin disk with a texture of radial stripes going from a little bit transparent white colour ( "color rgbt <1,1,1,0.3>") continuously to a totally clear section ("color Clear"). Increasing the last value of rgbt<1,1,1,0.3> to i.e. rgbt<1,1,1,0.5> make the blur less visible and more transparent. If we use white blur stripes than to test this effect we need to take a dark background so that the effect will be visible clearly. The statement "radial" together with a "texture_map" shows this effect in the xz-plane, so we have to turn it by rotate<90,0,0> to the xy-plane. Using the Number_of_Blades as well as the Blade_Radius with a declared variable, allows us to adapt this disk to any kind of propeller we want.

 Simulating motion blur

```//----------------------- blured radial stripes
frequency Number_of_Radial_Stripes // = number of blades
rotate <90,0,0> // turn it in  x y plane
texture_map { [0.00  pigment {color rgbt<1,1,1,0.3>}
finish  {ambient 0.15
diffuse 0.85
phong 0.1       }]
[0.60 pigment{ color Clear }]
[1.00 pigment{ color Clear }]
}
#end // end of macro --------------------------------------

// -------------- the blur of the propeller blades

#declare Number_of_Blades = 3;