Generate NURBS surface
A control matrix may specify the control points. The order of the curve may be specified for both the x and y axes (which are sometimes referred to as the u and v surface axes). The order of the curve must be less than the number of control points across the associated dimension. The default order is 3 (i.e., cubic).
At present, the knots sequence is automatically generated based a sum equal to the curve + number of control points. Control points may be non uniformly weighted if the control matrix has 4 planes (x, y, z, w) where w is the weight value. By default, the control matrix is a random 4x4 matrix of uniformly weighted points.
The jit.gl.nurbs object requires one argument: the name of a drawing context. A named drawing context is a named instance of a jit.window , jit.pwindow , or jit.matrix object that has an instance of the jit.gl.render object associated with it. This value may also be set via the OB3D drawto attribute.
|Copies the named matrix to the control point matrix. Matrices must have a planecount of 3 or 4, and should be type or
|Generates a random set of control points.
|The closed flag for each axis inf the form(default = 0 0). If closed about an axis, the nurbs surface will knot to smoothly close the surface across that axis.
|Control point rendering flag (default = 0) When the flag is set, the control points are rendered.
|The dimensions of the grid (default = 20 20)
|Cache in displaylist flag (default = 0) This feature may be used to speed up rendering time by creating and storing a list of gl drawing commands on the graphics card. This will have no effect if matrixoutput turned on.
|The interpolation order in the form(default = 3 3). The minimum interpolation order is 1 1. The maximum order is set by the values (control; max = control matrix width-1 height-1)
|Open GL floating-point data visualization
|Generate simple geometric shapes as a connected grid
|Use mouse movement to control position/rotation
|Generates a GL based surface extraction
|Generates GL geometry from existing data
|Read and draw Wavefront .obj models
|Generate platonic solids
|Render Open GL
|Manages a GL shader
|GL parallel to lcd
|Performs a GL accelerated grid-based evaluation
|Write bitmap text
|Write vector text
|Manages a GL texture
|GL accelerated video plane
|Creates a GL accelerated volume vizualization