fortplot_figure_quiver Module

Quiver plot (discrete vector arrows) functionality module

Single Responsibility: Handle quiver plot creation for discrete vector fields Provides arrow visualization at grid points showing direction and magnitude

Functions

public function quiver_basic_validation(x, y, u, v) result(is_valid)

Validate quiver input arrays have matching dimensions

Arguments

Type	Intent	Optional	Attributes		Name
real(kind=wp),	intent(in),		contiguous	::	x(:)
real(kind=wp),	intent(in),		contiguous	::	y(:)
real(kind=wp),	intent(in),		contiguous	::	u(:)
real(kind=wp),	intent(in),		contiguous	::	v(:)

Return Value logical

Subroutines

public subroutine quiver_figure(plots, state, plot_count, x, y, u, v, scale, color, width, headwidth, headlength, units, pivot, scale_units, angles, colormap, alpha)

Add quiver plot to figure Creates discrete vector arrows at (x,y) positions with (u,v) directions

Arguments

Type	Intent	Optional	Attributes		Name
type(plot_data_t),	intent(inout)			::	plots(:)
type(figure_state_t),	intent(inout)			::	state
integer,	intent(inout)			::	plot_count
real(kind=wp),	intent(in),		contiguous	::	x(:)
real(kind=wp),	intent(in),		contiguous	::	y(:)
real(kind=wp),	intent(in),		contiguous	::	u(:)
real(kind=wp),	intent(in),		contiguous	::	v(:)
real(kind=wp),	intent(in),	optional		::	scale
real(kind=wp),	intent(in),	optional		::	color(3)
real(kind=wp),	intent(in),	optional		::	width
real(kind=wp),	intent(in),	optional		::	headwidth
real(kind=wp),	intent(in),	optional		::	headlength
character(len=*),	intent(in),	optional		::	units
character(len=*),	intent(in),	optional		::	pivot
character(len=*),	intent(in),	optional		::	scale_units
character(len=*),	intent(in),	optional		::	angles
character(len=*),	intent(in),	optional		::	colormap
real(kind=wp),	intent(in),	optional		::	alpha