kopia lustrzana https://github.com/villares/sketch-a-day
119 wiersze
3.8 KiB
Python
119 wiersze
3.8 KiB
Python
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class Poly():
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text_on = False
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drag = -1
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drag_hole = -1
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drag_drag_pt = -1
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def __init__(self, outer_pts, holes=[[(0, 0)]]):
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self.outer_pts = outer_pts
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self.holes = holes
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@classmethod
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def setup_grid(cls, cell_size, order, x_offset, y_offset):
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cls.cell_size = cell_size
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cls.order = order
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cls.x_offset, cls.y_offset = x_offset, y_offset
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def plot(self):
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pushStyle()
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if len(self.outer_pts) >= 3:
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fill(255)
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beginShape()
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for x, y in self.outer_pts:
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stroke(0)
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sx = (x + Poly.x_offset) * Poly.cell_size
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sy = (y + Poly.y_offset) * Poly.cell_size
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vertex(sx, sy)
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for h in self.holes:
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beginContour()
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for x, y in h:
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sx = (x + Poly.x_offset) * Poly.cell_size
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sy = (y + Poly.y_offset) * Poly.cell_size
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vertex(sx, sy)
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endContour()
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endShape(CLOSE)
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Poly.annotate_pts(self.outer_pts, color(200, 0, 0), 5)
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Poly.annotate_pts(self.holes[0], color(0, 0, 200), 5)
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popStyle()
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def remove_pt(self):
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snap = Poly.mouse_snap()
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if snap:
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for pt in self.outer_pts:
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if pt == snap:
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self.outer_pts.remove(pt)
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return True
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for h in self.holes:
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for pt in h:
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if pt == snap:
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h.remove(pt)
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return True
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def set_drag(self): #, io, jo):
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snap = Poly.mouse_snap()
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if snap:
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for ipt, pt in enumerate(self.outer_pts):
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if pt == snap: #(io, jo):
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Poly.drag_pt = ipt
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return True
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for ih, h in enumerate(self.holes):
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for ipt, pt in enumerate(h):
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if pt == snap: #(io, jo):
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Poly.drag_hole = ih
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Poly.drag_pt = ipt
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return True
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return False
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@classmethod
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def annotate_pts(cls, pts, c, scale_m=1):
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if Poly.text_on:
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strokeWeight(5)
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textSize(12)
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fill(c)
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stroke(c)
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for i, j in pts:
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x = (i + cls.x_offset) * cls.cell_size
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y = (j + cls.y_offset) * cls.cell_size
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point(x, y)
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text(str((i * scale_m, j * scale_m)), x, y)
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@classmethod
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def draw_grid(cls):
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stroke(128)
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noFill()
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for x in range(cls.order):
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for y in range(cls.order):
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rect(x * cls.cell_size, y * cls.cell_size,
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cls.cell_size, cls.cell_size)
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@staticmethod
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def clockwise_sort(xy_pairs):
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# https://stackoverflow.com/questions/51074984/sorting-according-to-clockwise-point-coordinates
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data_len = len(xy_pairs)
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if data_len > 2:
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x, y = zip(*xy_pairs)
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else:
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return xy_pairs
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centroid_x, centroid_y = sum(x) / data_len, sum(y) / data_len
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xy_sorted = sorted(xy_pairs,
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key=lambda p: atan2((p[1] - centroid_y), (p[0] - centroid_x)))
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xy_sorted_xy = [
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coord for pair in list(zip(*xy_sorted)) for coord in pair]
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half_len = int(len(xy_sorted_xy) / 2)
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return list(zip(xy_sorted_xy[:half_len], xy_sorted_xy[half_len:]))
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@classmethod
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def mouse_snap(cls):
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for i in range(Poly.order):
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x = i * Poly.cell_size
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for j in range(Poly.order):
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y = j * Poly.cell_size
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io, jo = i - Poly.x_offset, j - Poly.y_offset # grid origin correction
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if dist(mouseX, mouseY, x, y) < Poly.cell_size / 2:
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return (io, jo)
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return None
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