fsleyes.gl.gl14.gllinevector_funcs

This module provides functions which are used by the GLLineVector class to render Image overlays as line vector images in an OpenGL 1.4 compatible manner.

This module uses functions in the gl14.glvector_funcs module, which contains logic used for rendering both GLRGBVector and GLLineVector instances.

A GLLineVertices instance is used to generate line vertices and texture coordinates for each voxel in the image. A fragment shader (the same as that used by the GLRGBVector class) is used to colour each line according to the orientation of the underlying vector.

fsleyes.gl.gl14.gllinevector_funcs.init(self)

Compiles and configures the vertex/fragment shader programs, generates line vertices, and adds some listeners to properties of the LineVectorOpts instance associated with the vector Image overlay. This involves calls to the compileShaders(), updateShaderState(), and updateVertices() functions.

fsleyes.gl.gl14.gllinevector_funcs.destroy(self)

Destroys the vertex/fragment shader programs and the GLLineVertices instance, and removes property listeners from the LineVectorOpts instance.

fsleyes.gl.gl14.gllinevector_funcs.compileShaders(self)

Compiles shader programs via the gl14.glvector_funcs.compileShaders() function, and calls the updateVertices() function.

fsleyes.gl.gl14.gllinevector_funcs.updateVertices(self)

Creates/refreshes the GLLineVertices instance which is used to generate line vertices and texture coordinates. If the GLLineVertices instance exists and is up to date (see the GLLineVertices.calculateHash() method), this function does nothing.

fsleyes.gl.gl14.gllinevector_funcs.updateShaderState(self)

Updates all fragment/vertex shader program variables. The fragment shader is configured by the gl21.glvector_funcs.updateFragmentShaderState() function.

fsleyes.gl.gl14.gllinevector_funcs.preDraw(self, xform=None, bbox=None)

Initialises the GL state ready for drawing the GLLineVector.

fsleyes.gl.gl14.gllinevector_funcs.draw2D(self, zpos, axes, xform=None, bbox=None)

Draws the line vertices corresponding to a 2D plane located at the specified Z location.

fsleyes.gl.gl14.gllinevector_funcs.draw3D(self, xform=None, bbox=None)

fsleyes.gl.gl14.gllinevector_funcs.drawAll(self, axes, zposes, xforms)

Draws line vertices corresponding to each Z location.

fsleyes.gl.gl14.gllinevector_funcs.postDraw(self, xform=None, bbox=None)

Clears the GL state after drawing the GLLineVector.