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[added] intersect.line_circle_overlap
for checking boolean overlap circles vs lines
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@ -85,11 +85,13 @@ function intersect.nearest_point_on_line(a_start, a_end, b_pos, into)
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return into
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return into
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end
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end
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--internal
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--vector from line seg to point
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--vector from line seg to point
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function intersect._line_to_point(a_start, a_end, b_pos, into)
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function intersect._line_to_point(a_start, a_end, b_pos, into)
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return intersect.nearest_point_on_line(a_start, a_end, b_pos, into):vsubi(b_pos)
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return intersect.nearest_point_on_line(a_start, a_end, b_pos, into):vsubi(b_pos)
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end
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end
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--internal
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--line displacement vector from separation vector
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--line displacement vector from separation vector
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function intersect._line_displacement_to_sep(a_start, a_end, separation, total_rad)
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function intersect._line_displacement_to_sep(a_start, a_end, separation, total_rad)
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local distance = separation:normalisei_len()
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local distance = separation:normalisei_len()
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@ -106,6 +108,14 @@ function intersect._line_displacement_to_sep(a_start, a_end, separation, total_r
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return false
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return false
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end
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end
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--overlap a line segment with a circle
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function intersect.line_circle_overlap(a_start, a_end, a_rad, b_pos, b_rad)
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local nearest = intersect._line_to_point(a_start, a_end, b_pos, vec2:pooled())
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local overlapped = intersect.circle_point_overlap(b_pos, a_rad + b_rad, nearest)
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nearest:release()
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return overlapped
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end
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--collide a line segment with a circle
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--collide a line segment with a circle
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function intersect.line_circle_collide(a_start, a_end, a_rad, b_pos, b_rad, into)
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function intersect.line_circle_collide(a_start, a_end, a_rad, b_pos, b_rad, into)
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into = intersect._line_to_point(a_start, a_end, b_pos, into)
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into = intersect._line_to_point(a_start, a_end, b_pos, into)
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