class CTioga2::Graphics::Styles::OrientedLineStyle
This class represents all the stylistic information necessary to draw a line parallel to a certain direction, indicated by an angle (default to horizontal)
Public Instance Methods
draw_oriented_arrow(t, xo, yo, len)
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len is a dimension
# File lib/ctioga2/graphics/styles/arrows.rb, line 170 def draw_oriented_arrow(t, xo, yo, len) angle = @angle || 0.0 dx,dy = *len.to_figure(t, angle) case @origin || Tioga::FigureConstants::LEFT_JUSTIFIED when Tioga::FigureConstants::LEFT_JUSTIFIED x1, y1 = xo, yo x2, y2 = xo + dx, yo + dy when Tioga::FigureConstants::CENTERED x1, y1 = xo - 0.5 * dx, yo - 0.5 * dy x2, y2 = xo + 0.5 * dx, yo + 0.5 * dy when Tioga::FigureConstants::RIGHT_JUSTIFIED x1, y1 = xo - dx, yo - dy x2, y2 = xo, yo end draw_arrow(t, x1, y1, x2, y2) end