01b

2019/sketch_190201b/arcs.py

@@ -0,0 +1,83 @@
+# -*- coding: utf-8 -*-
+
+ROTATION = {0: 0,
+            BOTTOM: 0,
+            DOWN: 0,
+            1: HALF_PI,
+            LEFT: HALF_PI,
+            2: PI,
+            TOP: PI,
+            UP: PI,
+            3: PI + HALF_PI,
+            RIGHT: PI + HALF_PI,
+            BOTTOM + RIGHT: 0,
+            DOWN + RIGHT: 0,
+            DOWN + LEFT: HALF_PI,
+            BOTTOM + LEFT: HALF_PI,
+            TOP + LEFT: PI,
+            UP + LEFT: PI,
+            TOP + RIGHT: PI + HALF_PI,
+            UP + RIGHT: PI + HALF_PI,
+            }
+
+def quarter_circle(x, y, radius, quadrant):
+    circle_arc(x, y, radius, ROTATION[quadrant], HALF_PI)
+
+def half_circle(x, y, radius, quadrant):
+    circle_arc(x, y, radius, ROTATION[quadrant], PI)
+
+def circle_arc(x, y, radius, start_ang, sweep_ang):
+    arc(x, y, radius * 2, radius * 2, start_ang, start_ang + sweep_ang)
+
+def bar(x1, y1, x2, y2, thickness=None, shorter=0, ends=(1, 1)):
+    """
+    O código para fazer as barras, dois pares (x, y),
+    um parâmetro de encurtamento: shorter
+    """
+    L = dist(x1, y1, x2, y2)
+    if not thickness:
+        thickness = 10
+    with pushMatrix():
+        translate(x1, y1)
+        angle = atan2(x1 - x2, y2 - y1)
+        rotate(angle)
+        offset = shorter / 2
+        line(thickness / 2, offset, thickness / 2, L - offset)
+        line(-thickness / 2, offset, -thickness / 2, L - offset)
+        if ends[0]:
+            half_circle(0, offset, thickness / 2, UP)
+        if ends[1]:
+            half_circle(0, L - offset, thickness / 2, DOWN)
+
+def var_bar(p1x, p1y, p2x, p2y, r1, r2=None):
+    if r2 is None:
+        r2 = r1
+    d = dist(p1x, p1y, p2x, p2y)
+    if d > 0:
+        with pushMatrix():
+            translate(p1x, p1y)
+            angle = atan2(p1x - p2x, p2y - p1y)
+            rotate(angle + HALF_PI)
+            ri = r1 - r2
+            beta = asin(ri / d) + HALF_PI
+            x1 = cos(beta) * r1
+            y1 = sin(beta) * r1
+            x2 = cos(beta) * r2
+            y2 = sin(beta) * r2
+            line(-x1, -y1, d - x2, -y2)
+            line(-x1, +y1, d - x2, +y2)
+            arc(0, 0, r1 * 2, r1 * 2,
+                -beta - PI, beta - PI)
+            arc(d, 0, r2 * 2, r2 * 2,
+                beta - PI, PI - beta)
+            pushStyle()
+            noStroke()
+            beginShape()
+            vertex(-x1, -y1)
+            vertex(d - x2, -y2)
+            vertex(d, 0)
+            vertex(d - x2, +y2)
+            vertex(-x1, +y1)
+            vertex(0, 0)
+            endShape(CLOSE)
+            popStyle()

2019/sketch_190201b/sketch_190201b.pyde

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+from arcs import *
+
+def setup():
+    size(500, 500)
+    noStroke()
+    var_bar(100, 100, 400, 400, 50, 25)
+    stroke(0)
+    noFill()
+    var_bar(400, 100, 200, 350, 50, 100)
+    fill(255, 0, 0, 50)
+    var_bar(150, 250, 450, 250, 100, 25)
+