22a

2019/sketch_190522a/frame_box.py

@@ -0,0 +1,111 @@
+CORTE, VINCO = color(255, 0, 0), color(0, 0, 255)
+
+def face(x, y, w, h, e):
+    mw, mh = w / 2., h / 2.
+    pushMatrix()
+    translate(x, y)
+    beginShape()
+    vertex(-mw, -mh)
+    vertex(+mw, -mh)
+    vertex(+mw, +mh)
+    vertex(-mw, +mh)
+    if e > 0 and mw - e > 0 and mh - e > 0:
+        mw -= e
+        mh -= e
+        beginContour()
+        vertex(-mw, -mh)
+        vertex(-mw, +mh)        
+        vertex(+mw, +mh)
+        vertex(+mw, -mh)
+        endContour()
+    endShape(CLOSE)
+    popMatrix()
+    
+def frame_box(w, h, d, e=0):
+     mw, mh, md = w/2., h/2., d/2.
+     translate(0, 0, -md) # base
+     face(0, 0, w, h, e)
+     translate(0, 0, d) # topo
+     face(0, 0, w, h, e)
+     translate(0, 0, -md) # volta
+     rotateY(HALF_PI)
+     translate(0, 0, -mw) # lateral e
+     face(0, 0, d, h, e)
+     translate(0, 0, w) # lateral d
+     face(0, 0, d, h, e)
+     translate(0, 0, -mw) # volta    
+     rotateY(-HALF_PI)  # volta
+     rotateX(HALF_PI)
+     translate(0, 0, -mh) # lateral e
+     face(0, 0, w, d, e)
+     translate(0, 0, h) # lateral d
+     face(0, 0, w, d, e)
+     translate(0, 0, -mw) # volta         
+     rotateX(-HALF_PI)
+
+def unfolded_box(w, h, d, e=0, draw_main=True):
+    mw, mh, md = w / 2., h / 2., d / 2.
+    face_unfold(0, -h - md, w, d, "aaan", e, draw_main)
+    face_unfold(0, -mh, w, h, "vvvv", e, draw_main)
+    face_unfold(0, -mh + mh + md, w, d, "cncv", e, draw_main)
+    face_unfold(0, +mh + d, w, h, "cncc", e, draw_main)
+    face_unfold(-mw - md, -mh, d, h, "acna", e, draw_main)
+    face_unfold(mw + md, -mh, d, h, "ncaa", e, draw_main)
+
+def face_unfold(x, y, w, h, sides, e=0, draw_main=True):
+    l0, l1, l2, l3 = sides
+    mw, mh = w / 2., h / 2.
+    pushMatrix()
+    translate(x, y)
+    if draw_main:
+        edge(-mw, +mh, -mw, -mh, l0)
+        edge(-mw, -mh, +mw, -mh, l1)
+        edge(+mw, -mh, +mw, +mh, l2)
+        edge(+mw, +mh, -mw, +mh, l3)
+    if e > 0 and mw - e > 0 and mh - e > 0:
+        face_unfold(0, 0, w - e * 2, h - e * 2, "cccc")
+    popMatrix()
+
+def edge(x0, y0, x1, y1, edge_type):
+    if edge_type == "n":
+        return
+    elif edge_type == "c":
+        stroke(CORTE)
+    else:
+        stroke(VINCO)
+    line(x0, y0, x1, y1)
+    if edge_type == "a":
+        stroke(CORTE)
+        noFill()
+        glue_tab((x0, y0), (x1, y1), 10)
+
+def glue_tab(p1, p2, tab_w, cut_ang=QUARTER_PI / 3):
+    """
+    draws a trapezoidal or triangular glue tab along edge defined by p1 and p2,
+    with width tab_w and cut angle a
+    """
+    al = atan2(p1[0] - p2[0], p1[1] - p2[1])
+    a1 = al + cut_ang + PI
+    a2 = al - cut_ang
+    # calculate cut_len to get the right tab width
+    cut_len = tab_w / sin(cut_ang)
+    f1 = (p1[0] + cut_len * sin(a1),
+          p1[1] + cut_len * cos(a1))
+    f2 = (p2[0] + cut_len * sin(a2),
+          p2[1] + cut_len * cos(a2))
+    edge_len = dist(p1[0], p1[1], p2[0], p2[1])
+
+    if edge_len > 2 * cut_len * cos(cut_ang):    # 'normal' trapezoidal tab
+        beginShape()
+        vertex(*p1)    # vertex(p1[0], p1[1])
+        vertex(*f1)
+        vertex(*f2)
+        vertex(*p2)
+        endShape()
+    else:    # short triangular tab
+        fm = ((f1[0] + f2[0]) / 2, (f1[1] + f2[1]) / 2)
+        beginShape()
+        vertex(*p1)
+        vertex(*fm)    # middle way of f1 and f2
+        vertex(*p2)
+        endShape()

2019/sketch_190522a/sketch_190522a.pyde

@@ -0,0 +1,42 @@
+# Alexandre B A Villares - https://abav.lugaralgum.com/sketch-a-day
+
+from frame_box import frame_box, unfolded_box
+
+modes = [-1, 0, 1] # click mouse to switch modes
+
+def setup():
+    size(600, 600, P3D)
+
+def draw():
+    background(200)
+    translate(300, 300)
+    if modes[0] >= 0:
+        fill(255)
+        stroke(0)
+        pushMatrix()
+        translate(0, 0, 200)
+        rotateX(HALF_PI / 2)
+        frame_box(250, 150, 100, 30)
+        popMatrix()
+    if modes[0] <= 0:
+        unfolded_box(250, 150, 100, 30)
+
+def mousePressed():
+    modes[:] = modes[1:] + [modes[0]]
+    
+def keyPressed():
+    saveFrame("a###.png")
+    
+# para gerar o markdown que vai na página do sketch-a-day    
+def settings():
+    from os import path
+    global SKETCH_NAME
+    SKETCH_NAME = path.basename(sketchPath())
+    OUTPUT = ".gif"
+    println(
+        """
+![{0}]({2}/{0}/{0}{1})
+
+[{0}](https://github.com/villares/sketch-a-day/tree/master/{2}/{0}) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]
+""".format(SKETCH_NAME, OUTPUT, year())
+    )

README.md

@@ -22,6 +22,11 @@ Get updates from my sort-of-weekly newsletter: [[sketch-mail](https://villares.o
 
 ## 2019
 
+---
+
+![sketch_190522a](2019/sketch_190522a/sketch_190522a.gif)
+
+[sketch_190522a](https://github.com/villares/sketch-a-day/tree/master/2019/sketch_190522a) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]
 
 ---