public class GenericProjection extends Object implements Projection
Constructor and Description |
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GenericProjection(double[][] coordsX,
double[][] coordsY) |
Modifier and Type | Method and Description |
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int |
getSizeX(int textureSizeX)
Returns the number of quads in the x direction that the array of data (the texture)
should be broken into.
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int |
getSizeY(int textureSizeY) |
void |
getVertexXY(double dataFractionX,
double dataFractionY,
float[] resultXY)
Given a position in a rectangular array of data (the texture), return the
corresponding location in physical units.
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void |
getVertexXYZ(double textureFractionX,
double textureFractionY,
float[] resultXYZ)
Given a position in a rectangular array of data (the texture), return the
corresponding location in physical units.
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public GenericProjection(double[][] coordsX, double[][] coordsY)
public void getVertexXY(double dataFractionX, double dataFractionY, float[] resultXY)
Projection
This method computes the physical coordinate of the data at (textureFractionX, textureFractionY), and stores them in the resultXY output parameter.
getVertexXY
in interface Projection
dataFractionX
- a relative x index (from 0.0 to 1.0) into the data arraydataFractionY
- a relative y index (from 0.0 to 1.0) into the data arrayresultXY
- output parameter to be populated with physical coords of the datapublic void getVertexXYZ(double textureFractionX, double textureFractionY, float[] resultXYZ)
Projection
This method computes the physical coordinate of the data at (textureFractionX, textureFractionY), and stores them in the resultXYZ output parameter.
Assigning z coordinates to vertices can be useful even for 2D graphics. For example, it can be used together with z-clipping to avoid rendering some facets.
getVertexXYZ
in interface Projection
textureFractionX
- a relative x index (from 0.0 to 1.0) into the data arraytextureFractionY
- a relative y index (from 0.0 to 1.0) into the data arrayresultXYZ
- output parameter to be populated with physical coords of the datapublic int getSizeX(int textureSizeX)
Projection
For more complicated projections, the value returned essentially defines the granularity or resolution of the projection (since the projection will ultimately be approximated when displayed by drawing a set of small quads).
getSizeX
in interface Projection
textureSizeX
- the length of the data array (the texture) in the x directionpublic int getSizeY(int textureSizeY)
getSizeY
in interface Projection
textureSizeY
- the length of the data array (the texture) in the y directionProjection.getSizeX( int )
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