19

2019/sketch_190719a/sketch_190719a.pyde

@@ -0,0 +1,118 @@
+# Alexandre B A Villares - https://abav.lugaralgum.com/sketch-a-day
+# Using JCSG library prepared for Processing by George Profenza
+# Work in progress...
+
+# You'll need to copy these libs into your Processing libraries folder:
+add_library('VVecMath')
+add_library('jcsg')
+
+from random import choice
+
+dim = (200, 300, 400, 500)
+
+
+def setup():
+    global pshape_result
+    size(600, 500, P3D)
+    hint(ENABLE_DEPTH_TEST)
+    hint(ENABLE_DEPTH_SORT)
+    # fill(100, 200, 200, 240)
+    pshape_result = calculate_stuff()
+
+
+def draw():
+    background(240)
+    lights()
+    translate(width * 0.5, height * 0.5, -height)
+    rotateY(map(mouseX, 0, width, -PI, PI))
+    rotateX(map(mouseY, 0, height, PI, -PI))
+    for ps in pshape_result:
+        shape(ps)
+
+
+def calculate_stuff():
+    solids, holes = [], []
+    thick = 50
+    for i, s in enumerate(range(2)):
+        w, h, d = choice(dim), choice(dim), choice(dim)
+        solid = Cube(w, h, d).toCSG()
+        if w / 100 % 2:
+            hole = Cube(w - thick, h, d - thick).toCSG()
+        else:
+            hole = Cube(w, h - thick, d - thick).toCSG()
+        move = choice(dim)
+        if move / 100 % 2:
+            hole = csgRot(hole, 15, 0, 0)
+            solid = csgRot(solid, 15, 0, 0)
+        solids.append(csgTranslate(solid, move - 250, 0, 0))
+        holes.append(csgTranslate(hole, move - 250, 0, 0))
+
+    mass = solids[0].union(solids[1:])
+    void = holes[0].union(holes[1:])
+    sub_result = mass.difference(void)
+    results = []
+    for s in solids:
+        results.append(sub_result.intersect(s))
+    for i, r in enumerate(results):
+        results[i] = r.difference(solids[i - 1])
+    results.append(solids[0].intersect(solids[1]).intersect(sub_result))
+    
+    
+    colors = [lambda: color(255, 100, 100),
+              lambda: color(0, 255, 100),
+              lambda: color(0, 100, 255)]
+    return [CSGToPShape(r, 1, colors[i % len(results)])
+            for i, r in enumerate(results)]
+
+
+def csgTranslate(csg, x, y, z):
+    return csg.transformed(Transform.unity().translate(x, y, z))
+
+def csgRot(csg, x, y, z):
+    return csg.transformed(Transform.unity().rot(x, y, z))
+
+def CSGToPShape(mesh, scale, color_maker):
+    """
+    Convert a CSG mesh to a Processing PShape
+    """
+    result = createShape(GROUP)  # allocate a PShape group
+    # for each polygon (Note: these can have 3,4 or more vertices)
+    for p in mesh.getPolygons():
+        # make a child PShape
+        polyShape = createShape()
+        # begin setting vertices to it
+        polyShape.beginShape()
+        # for each vertex in the polygon
+        for v in p.vertices:
+            # add each (scaled) polygon vertex
+            polyShape.vertex(v.pos.x * scale,
+                             v.pos.y * scale,
+                             v.pos.z * scale)
+
+        # finish this polygon
+        polyShape.endShape()
+        polyShape.setFill(color_maker())
+        # append the child PShape to the parent
+        result.addChild(polyShape)
+
+    return result
+
+def keyPressed():
+    if key == "p":
+        saveFrame("###.png")
+    if key == " ":
+        global pshape_result
+        pshape_result = calculate_stuff()
+
+def settings():
+    from os import path
+    global SKETCH_NAME
+    SKETCH_NAME = path.basename(sketchPath())
+    OUTPUT = ".png"
+    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())
+    )