Difference between revisions of "HowTo:Use the plane object"
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==The Plane== | ==The Plane== | ||
In POV a plane is considered to have a volume, any point that is "under" the plane is inside, and any point that is "above" the plane is outside. This becomes important when you use a plane in CSG. A plane is defined in POV by a direction vector, and a float distance. The direction vector indicates the "up" direction, and the distance is how far in that direction from the origin the surface begins. | In POV a plane is considered to have a volume, any point that is "under" the plane is inside, and any point that is "above" the plane is outside. This becomes important when you use a plane in CSG. A plane is defined in POV by a direction vector, and a float distance. The direction vector indicates the "up" direction, and the distance is how far in that direction from the origin the surface begins. | ||
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#include "colors.inc" | #include "colors.inc" | ||
plane {y,-1 | plane {y,-1 | ||
pigment {checker White Tan} | pigment {checker White Tan} | ||
} | } | ||
| + | |||
This uses the default y vector for "up", it's easy enough to rotate a plane to the desired angles after creating it, but vrotate can be used to rotate the vector before defining the plane. | This uses the default y vector for "up", it's easy enough to rotate a plane to the desired angles after creating it, but vrotate can be used to rotate the vector before defining the plane. | ||
Revision as of 02:49, 26 December 2007
The Plane
In POV a plane is considered to have a volume, any point that is "under" the plane is inside, and any point that is "above" the plane is outside. This becomes important when you use a plane in CSG. A plane is defined in POV by a direction vector, and a float distance. The direction vector indicates the "up" direction, and the distance is how far in that direction from the origin the surface begins.
#include "colors.inc"
plane {y,-1
pigment {checker White Tan}
}
This uses the default y vector for "up", it's easy enough to rotate a plane to the desired angles after creating it, but vrotate can be used to rotate the vector before defining the plane.