curve_drawable

Polyline stored on the GPU, ready to be drawn.

Fields and methods

Members of the struct curve_drawable. Most of what you do with a CGP type goes through the free functions listed below.

`curve_drawable_display_type display_type = curve_drawable_display_type::Curve`	Drawing mode, Curve (default) for a GL_LINE_STRIP joining all the points, or Segments for GL_LINES between consecutive pairs of points.
`opengl_shader_structure shader`	Shader program used to draw the curve, which must be valid (non-zero id) at draw time.
`opengl_vbo_structure vbo_position`	VBO storing the positions of the curve points, bound to shader location 0.
`GLuint vao = 0`	OpenGL id of the Vertex Array Object of the curve, 0 when not initialized.
`affine model`	Model transform sent to the uniform model, reset to identity by initialize_data_on_gpu and clear.
`vec3 color`	Uniform RGB color of the curve sent to the uniform color, set to red by initialize_data_on_gpu.
`opengl_shader_structure default_shader`	Static shader shared by all curve_drawable and used by default in initialize_data_on_gpu, loaded from shaders/single_color by the application.

`void initialize_data_on_gpu(numarray<vec3> const& position, opengl_shader_structure const& shader = default_shader)`	Uploads the positions into a new VBO and VAO, sets the shader, and resets model to identity and color to red (does nothing but warn if position is empty). src
`void clear()`	Deletes the VBO and the VAO, sets the shader id to 0 without deleting the program, and resets model to identity and color to black. src
`void send_opengl_uniform(bool expected = true) const`	Sends the uniforms color and model to the shader of the curve. src

void draw(
    curve_drawable const& drawable,
    environment_generic_structure const& environment,
    int N_points = -1
)

Draw a curve_drawable as a line strip or as separate segments, limited to the first N_points points if N_points is not -1.

None.

None.