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- POV-Ray Tutorial
- Conditional
Statements
Branching
#if(...) ... #else ... #end
- in loops
- in macros
- in animations
> turning on/off of parts
#switch(...) #case(..) ...
#range(..) ... #end
- selection by tables
Check for Existence
#ifdef(...) #ifndef(...)
- Check in include files
- Defaults in include files
Loops
Prechecked, Postchecked,
Count-controlled, Early-Exit
#while(...)... #end
#for(...)... #end
- Samples:
- Loops with POV-Ray
- Loops, Sine, Cosine
- Random with POV-Ray
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Turning on/off parts of a scene
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Sample for the use of a single branching by #if
for turning on/off parts of a scene:
(i.e. a background with low speed of caculation during developing forground elements):
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//-----------------------------
#declare Trees_On = 0;// 0=off;1=on
#declare Mountains_On = 0;// 0=off;1=on
// turn on/off elements here!
// ...
// ... and somewhere later
// in the scene file:
#if ( Mountains_On = 1 )
// mountains with low speed of caculation
#end // of "#if ( Mountains_On = 1 )"
#if ( Trees_On = 1)
// planting realistic trees
// needs many calculation time
#end // of "#if ( Trees_On = 1 )"
// and on with the forground objects ....
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