fsleyes.gl.gl14.glmesh_funcs

This module provides functions which are used by the GLMesh class to render Mesh overlays in an OpenGL 1.4 compatible manner.

An ARBPShader is used to manage the glmesh vertex/fragment programs.

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

Loads the glmesh vertex and fragment shader program source, and creates ARBPShader instance(s).

fsleyes.gl.gl14.glmesh_funcs.updateShaderState(self, **kwargs)

Updates the state of the vertex/fragment shaders according to the current MeshOpts configuration. This involves setting the parameter values used by the shaders.

fsleyes.gl.gl14.glmesh_funcs.preDraw(self)

Must be called before draw(). Loads the appropriate shader program.

fsleyes.gl.gl14.glmesh_funcs.draw(self, glType, vertices, indices=None, normals=None, vdata=None, mdata=None)

Called for 3D meshes, and MeshOpts.vertexData is not None. Loads and runs the shader program.

Parameters

• glType – The OpenGL primitive type.

• vertices – (n, 3) array containing the line vertices to draw.

• indices – Indices into the vertices array. If not provided, glDrawArrays is used.

• normals – Vertex normals.

• vdata – (n, ) array containing data for each vertex.

• mdata – (n, ) array containing alpha modulation data for each vertex.

fsleyes.gl.gl14.glmesh_funcs.postDraw(self)

Must be called after draw(). Unloads shaders, and unbinds textures.