Generate and render a path in OpenGL The jit.gl.path object generates and renders a 3D path. See the jit.path object for more information on the underlying path structure. The 3D visualization can be rendered as either a line, an extruded line (ribbon), an extruded circle (tube), or an extruded 2D contour. The path stores 10 values: position x/y/z, color r/g/b/a, scale x/y, and orient angle.
For more information on how the extrusion is handled, see the GLE library: http://www.linas.org/gle Cycling '74 Jitter messages to this 3d object TEXT_HERE TEXT_HERE matrix output if enabled TEXT_HERE dumpout TEXT_HERE Add color values Add color values to the last point in the path. Set the contour Set the contour to be used for pathstyle contour. The contour-vals are a list of X and Y position values describing a contour in 2D space. A minimum of 4 are required. Add an orientation value Add an orientation value to the last point in the path. Add scale values Add scale values to the last point in the path. Append point values Append point values to the end of the path. Remove all points from the path TEXT_HERE Delete the point at index Delete the point at index Calculate the path handles Calculate the path handles of each point in the path using the Catmull-Rom method. This will overwrite any previously stored handles. Create a closed path Close the path by adding a point to the end equal to the first point. Edit the point at index Edit the point at index Edit the point handle at index Edit the point handle at index Get handle values at index Get handle values at index and output through dump outlet. Get point values at index Get point values at index and output through dump outlet. Insert a new point at index Insert a new point at index Set color values at index TEXT_HERE Set orientation value at index TEXT_HERE Set scale values at index TEXT_HERE Enable automatic handle calculation Enable the calculation of handle values every time the path is edited (default = 1). Indicates a closed path Indicates the path is closed (first and last points are equal). Cache in displaylist flag (default = 0) 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. Draw handles flag Enable drawing of path handles, for debugging (default = 0). Close extrusion endpoints flag Enable the closing of extruded path endpoints. (default = 0) Determine where path starts A parameter between 0 and 1 to determine where in the path rendering starts (default = 0.). Determine where path ends A parameter between 0 and 1 to determine where in the path rendering ends (default = 1.). Extrusion scaling factor 2D scaling factor for extrusion contours in the form x y (default = 1. 1.). Path interpolation method Path interpolation method (default = linear). Linear interpolation TEXT_HERE Hermite interpolation TEXT_HERE Segment join method Extrusion segment join method (default = angle). See the GLE library for more information. TEXT_HERE TEXT_HERE TEXT_HERE TEXT_HERE TEXT_HERE TEXT_HERE TEXT_HERE TEXT_HERE Normal generation method (default = none) Normal generation method for extruded paths (default = none). See the GLE library for more information. No generation TEXT_HERE Normal vector per facet TEXT_HERE Normal vectors lie along edges TEXT_HERE Normal vectors lie along edges and interpolate between segments TEXT_HERE Path drawing method Path drawing method (default = line). TEXT_HERE TEXT_HERE TEXT_HERE TEXT_HERE TEXT_HERE TEXT_HERE TEXT_HERE TEXT_HERE Number of path points Number of path points (default = 0). Number of segments between points Number of segments between points (default = 20). The scaling factor for textures The 3D scaling factor for textures in the form x y z (default = 1. 1. 1.) . Texture coord generation Texturing coord generation method for extruded paths (default = 1). See the GLE library for more information. No texture coord generation TEXT_HERE Vertex X is U, accumulated segment length is V TEXT_HERE Normal vector X is U, accumulated segment length is V TEXT_HERE Vertex cylinder mapping for U, accumulated segment length for V TEXT_HERE Normal cylinder mapping for U, accumulated segment length for V TEXT_HERE Vertex sphere mapping TEXT_HERE Normal sphere mapping TEXT_HERE same as vertex_flat but with untransformed vertices TEXT_HERE same as normal_flat but with untransformed vertices TEXT_HERE same as vertex_cylinder but with untransformed vertices TEXT_HERE same as normal_cylinder but with untransformed vertices TEXT_HERE same as vertex_sphere but with untransformed vertices TEXT_HERE same as normal_sphere but with untransformed vertices TEXT_HERE This 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. Additionally it can reference the name of a jit.gl.node sub-context. This value may also be set via the OB3D drawto attribute. If no argument is present, the object is implicitly added to the first valid drawing context or sub-context found in the current patch or by searching up the patcher hierarchy.