trajectory_drawable

Trail of the last positions of a moving point, drawn as a curve.

Fields and methods

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

`numarray<vec3> position_record`	Recorded positions, the most recent first, allocated to N_max_sample points at the first call to add.
`curve_drawable visual`	Curve drawable displaying the first current_size recorded positions, red by default; its color and model can be set at any time, also before the first add.
`size_t N_max_sample`	Maximal number of positions kept in the trajectory, 100 by default.
`size_t current_size`	Number of valid positions recorded so far, at most N_max_sample.

`trajectory_drawable(size_t N_max_sample = 100)`	Builds an empty trajectory keeping at most N_max_sample positions, the GPU data being created at the first call to add. src
`void clear()`	Erases the recorded positions, releases the GPU data of the curve and sets current_size to 0, keeping the color and model of visual. src
`void add(vec3 const& position)`	Inserts a position at the front of the record, dropping the oldest one when N_max_sample is reached, and re-uploads the whole record to the VBO of the curve (asserts N_max_sample > 0). src

void draw(trajectory_drawable const& drawable, environment_generic_structure const& environment)

Draw the recorded positions of a trajectory_drawable as a polyline, if any.

None.

None.