2

2019/sketch_191202a/sketch_191202a.pyde

@@ -0,0 +1,79 @@
+
+pontos = []
+novos_pontos = []
+arrastando = -1
+offset_curva = 10
+novo_offset_curva = 10
+
+def setup():
+    size(500, 500)
+    novos_pontos[:] = pontos[:] = sorteia_pontos()
+
+def sorteia_pontos():
+    pontos = []
+    for _ in range(5):
+        x, y = random(width * .2, width * .8), random(height * .2, height * .8)
+        pontos.append((x, y))
+    return pontos
+
+def draw():
+    # background(240, 250, 250)
+    fill(240, 250, 250, 10)
+    noStroke()
+    rect(0, 0, width, height)
+    draw_pontos(pontos, offset_curva, handle=True)
+    # draw_pontos(novos_pontos, novo_offset_curva, handle=True)
+
+    if frameCount % 2 == 0:
+        for i, (x0, y0) in enumerate(pontos):
+            x1, y1 = novos_pontos[i]
+            if (x0, y0) != (x1, y1):
+                pontos[i] = (lerp(x0, x1, .2), lerp(y0, y1, .2))
+        global offset_curva
+        offset_curva = lerp(novo_offset_curva, offset_curva, .8)
+
+def draw_pontos(pontos, offset, handle=False):
+    for i, (x0, y0) in enumerate(pontos):
+        x1, y1 = pontos[i - 1]
+        noFill()
+        stroke(0)
+        strokeWeight(2)
+        curva(x0, y0, x1, y1, offset)
+        if handle and dist(mouseX, mouseY, x0, y0) < 10:
+            stroke(255, 0, 0)
+            strokeWeight(1)
+            circle(x0, y0, 10)
+
+
+def curva(x1, y1, x2, y2, offset=0):
+    L = dist(x1, y1, x2, y2)
+    with pushMatrix():
+        translate(x1, y1)
+        angle = atan2(x1 - x2, y2 - y1)
+        rotate(angle)
+        cx = (L / 2) * offset / 10.
+        bezier(0, 0, -cx, L * .50, +cx, L * .50, 0, L)
+
+def mousePressed():
+    global arrastando
+    for i, (x0, y0) in enumerate(pontos):
+        if dist(mouseX, mouseY, x0, y0) < 10:
+            arrastando = i
+
+def mouseReleased():
+    global arrastando
+    arrastando = -1
+
+def mouseDragged():
+    if arrastando >= 0:
+        novos_pontos[arrastando] = (mouseX, mouseY)
+
+def mouseWheel(e):
+    global novo_offset_curva
+    novo_offset_curva += e.getCount() / 5.
+
+def keyPressed():
+    if key == ' ':
+        novos_pontos[:] = sorteia_pontos()
+    if key == 's':
+        saveFrame("####.png")