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Texture displacement: animations that play on their own, and art for the
rest of the panel The animations advanced one frame per mouse movement and stood still whenever the mouse did. schedule_extra_frame() only guarantees an idle event at the moment the next frame is due; GLCanvas3D::on_idle() returns without rendering anything unless something marked the canvas dirty by then, and nothing had. set_dirty() on the gizmo is what on_idle reads, through GLGizmoBase::update_items_state(), to find out there are frames still to draw. Thirty-odd more pictures, covering the paint tools, brush size, the connected-area fill, the five views, the five projections, subdivision, feature-adaptive refinement, remeshing, hard edges, slivers, geometry smoothing, filament mixing and denoise. The generator grew three more drawing languages beside the shaded relief, each picked by what the setting is rather than by taste: a flat mesh of triangles where the subject is the mesh or a tool, a section where the subject is where the surface sits relative to where it was, and a flat ramp of greys where the subject is which filament a spot ends up as. Lighting a colour illustration or looking down on a vertical change would both add a second thing moving between two pictures meant to differ in one. Mapping is one ball with the checker laid on it five ways, which is the whole of what choosing a projection does - except Unwrap, which is not a projection onto the model and so is drawn as the flat layout it produces.
This commit is contained in:
ExPikaPaka
@@ -21,7 +21,7 @@ Needs numpy and pillow.
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import os
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import numpy as np
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from PIL import Image
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from PIL import Image, ImageDraw
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SIZE = 256 # px, square - the panel draws these at whatever width the tooltip has
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GIF_SIZE = 192 # animations are the same picture, smaller: every frame of one ships in resources/
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@@ -83,7 +83,7 @@ def save_png(name, rgb):
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def save_gif(name, frames, delay_ms):
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path = os.path.join(OUT_DIR, name)
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images = [Image.fromarray(vignette(f)).convert("P", palette=Image.ADAPTIVE, colors=32) for f in frames]
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images = [Image.fromarray(vignette(f)).convert("P", palette=Image.ADAPTIVE, colors=24) for f in frames]
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images[0].save(path, save_all=True, append_images=images[1:], duration=delay_ms, loop=0, optimize=True)
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print("wrote", os.path.normpath(path), os.path.getsize(path) // 1024, "KB")
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@@ -225,6 +225,404 @@ def dome(size=SIZE):
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return smoothstep(0.52, 0.02, np.hypot(x, y))
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# --- meshes, cursors and sections ---------------------------------------------------------------
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#
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# The second family of pictures. The settings above are about a pattern, and a shaded relief is what a
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# pattern looks like; these are about a tool or about the mesh, where what matters is which triangles
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# exist and which of them are painted. So they are drawn flat, the way the panel's own wireframe and
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# paint overlays draw them, with one accent colour meaning "painted" and nothing else coloured.
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SS = 3 # supersampling: PIL fills polygons without antialiasing, so draw big and shrink
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INK = (0.62, 0.67, 0.67) # mesh edges
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BARE = (0.28, 0.30, 0.31) # unpainted surface
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PAINT = (0.20, 0.47, 0.45) # painted with the active layer, in the panel's own accent
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CURSOR = (0.92, 0.95, 0.95)
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MARGIN = 0.05 # keeps the mesh off the picture's border, where the vignette darkens it
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def _px(p, size):
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"""Unit coordinates to pixels, inside the margin."""
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return ((MARGIN + p[0] * (1.0 - 2.0 * MARGIN)) * size, (MARGIN + p[1] * (1.0 - 2.0 * MARGIN)) * size)
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def _rgb255(c):
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return tuple(int(round(v * 255.0)) for v in c)
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def raster(draw_fn, size=SIZE, background=BARE):
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"""Runs draw_fn(draw, size_in_pixels) on a supersampled canvas and hands back the shrunk result.
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`background` is a colour, or a picture already drawn by the relief half of this script - which is
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how a mesh is shown sitting on the surface it refines.
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"""
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if isinstance(background, np.ndarray):
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image = Image.fromarray(background).resize((size * SS, size * SS), Image.BILINEAR)
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else:
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image = Image.new("RGB", (size * SS, size * SS), _rgb255(background))
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draw_fn(ImageDraw.Draw(image), size * SS)
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return np.asarray(image.resize((size, size), Image.LANCZOS)).astype(np.uint8)
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def tri_mesh(n, jitter=0.0, seed=1):
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"""A square patch of triangles, optionally with its inner vertices nudged off the grid.
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Jitter is not decoration: a perfectly regular grid reads as graph paper, and the point of these
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pictures is a mesh over a surface.
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"""
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rng = np.random.default_rng(seed)
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v = np.stack(np.meshgrid(np.linspace(0.0, 1.0, n + 1), np.linspace(0.0, 1.0, n + 1)), axis=-1)
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if jitter:
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v[1:n, 1:n] += (rng.random((n - 1, n - 1, 2)) - 0.5) * (jitter / n)
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tris = []
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for i in range(n):
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for j in range(n):
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tris.append((v[i, j], v[i, j + 1], v[i + 1, j + 1]))
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tris.append((v[i, j], v[i + 1, j + 1], v[i + 1, j]))
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return tris
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def centroids(tris):
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return np.array([np.mean(t, axis=0) for t in tris])
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def neighbours(tris):
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"""Which triangles share an edge with which, keyed on the rounded vertex positions."""
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edges = {}
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for i, t in enumerate(tris):
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for a, b in ((0, 1), (1, 2), (2, 0)):
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key = tuple(sorted((tuple(np.round(t[a], 6)), tuple(np.round(t[b], 6)))))
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edges.setdefault(key, []).append(i)
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out = [[] for _ in tris]
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for shared in edges.values():
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if len(shared) == 2:
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out[shared[0]].append(shared[1])
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out[shared[1]].append(shared[0])
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return out
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def draw_mesh(draw, size, tris, painted=None, edge=INK, edge_width=0.7):
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fill_bare, fill_paint = _rgb255(BARE), _rgb255(PAINT)
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for i, t in enumerate(tris):
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draw.polygon([_px(p, size) for p in t],
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fill=fill_paint if painted is not None and painted[i] else fill_bare,
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outline=_rgb255(edge), width=max(1, int(edge_width * SS)))
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def draw_brush(draw, size, centre, radius, filled=False):
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"""The brush cursor: a ring, which is how the gizmo draws it on the model."""
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c = _px(centre, size)
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r = radius * (1.0 - 2.0 * MARGIN) * size
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if filled:
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draw.ellipse([c[0] - r, c[1] - r, c[0] + r, c[1] + r], fill=(255, 255, 255, 40))
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draw.ellipse([c[0] - r, c[1] - r, c[0] + r, c[1] + r], outline=_rgb255(CURSOR), width=max(1, int(1.6 * SS)))
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def draw_pointer(draw, size, at):
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"""A small arrow, for the tools that are clicked rather than dragged."""
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x, y = _px(at, size)
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k = 0.055 * size
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draw.polygon([(x, y), (x, y + 1.45 * k), (x + 0.38 * k, y + 1.05 * k),
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(x + 0.62 * k, y + 1.55 * k), (x + 0.90 * k, y + 1.40 * k),
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(x + 0.66 * k, y + 0.92 * k), (x + 1.05 * k, y + 0.84 * k)],
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fill=_rgb255(CURSOR), outline=(30, 32, 34), width=max(1, int(0.9 * SS)))
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def stroke_path(t):
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"""The path a demonstrated brush stroke follows, t in 0..1."""
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return np.array([0.14 + 0.72 * t, 0.46 + 0.22 * np.sin(2.0 * np.pi * t * 1.1)])
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def brush_frames(size, erase, steps=14, radius=0.115, hold=3):
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tris = tri_mesh(9, jitter=0.55)
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cents = centroids(tris)
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painted = np.ones(len(tris), bool) if erase else np.zeros(len(tris), bool)
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frames = []
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for k in range(steps):
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centre = stroke_path(k / (steps - 1.0))
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hit = np.linalg.norm(cents - centre, axis=1) < radius
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painted = painted & ~hit if erase else painted | hit
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state = painted.copy()
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frames.append(raster(lambda d, s, st=state, c=centre: (draw_mesh(d, s, tris, st), draw_brush(d, s, c, radius)), size))
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frames += [frames[-1]] * hold
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return frames
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def face_frames(size, steps=9, hold=3):
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"""The Face tool: one triangle per click, under a pointer."""
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tris = tri_mesh(7, jitter=0.5, seed=4)
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cents = centroids(tris)
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order = np.argsort(np.linalg.norm(cents - np.array([0.5, 0.5]), axis=1))[:steps]
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painted = np.zeros(len(tris), bool)
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frames = []
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for i in order:
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painted[i] = True
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state = painted.copy()
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at = cents[i]
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frames.append(raster(lambda d, s, st=state, a=at: (draw_mesh(d, s, tris, st), draw_pointer(d, s, a)), size))
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frames += [frames[-1]] * hold
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return frames
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def flood_frames(size, creases, steps=12, hold=3, seed=7):
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"""The Connected area tool: a flood from one click, stopped by the creases it may not cross.
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`creases` is a list of x positions; a triangle pair straddling one cannot pass the fill between
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them, which is what an edge sharper than the angle threshold does on the model.
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"""
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tris = tri_mesh(9, jitter=0.5, seed=seed)
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cents = centroids(tris)
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adj = neighbours(tris)
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blocked = lambda i, j: any((cents[i][0] - x) * (cents[j][0] - x) < 0.0 for x in creases)
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seed_tri = int(np.argmin(np.linalg.norm(cents - np.array([0.22, 0.5]), axis=1)))
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painted = np.zeros(len(tris), bool)
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painted[seed_tri] = True
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frontier = [seed_tri]
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frames = []
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for _ in range(steps):
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state = painted.copy()
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frames.append(raster(lambda d, s, st=state: (draw_mesh(d, s, tris, st),
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draw_creases(d, s, creases),
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draw_pointer(d, s, cents[seed_tri])), size))
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nxt = []
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for i in frontier:
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for j in adj[i]:
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if not painted[j] and not blocked(i, j):
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painted[j] = True
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nxt.append(j)
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frontier = nxt
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frames += [frames[-1]] * hold
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return frames
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def draw_creases(draw, size, creases):
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"""A fold too sharp for the fill to cross: drawn dark with a bright crest, like a real one."""
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for x in creases:
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a, b = _px((x, -0.02), size), _px((x, 1.02), size)
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draw.line([a, b], fill=_rgb255((0.08, 0.09, 0.10)), width=max(1, int(4.0 * SS)))
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draw.line([a, b], fill=_rgb255((0.97, 0.99, 0.99)), width=max(1, int(1.4 * SS)))
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def split4(tri):
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a, b, c = tri
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ab, bc, ca = (a + b) * 0.5, (b + c) * 0.5, (c + a) * 0.5
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return [(a, ab, ca), (ab, b, bc), (ca, bc, c), (ab, bc, ca)]
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def refine(tris, density, max_depth, threshold=0.45):
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"""Splits a triangle into four wherever `density` at its middle asks for it, up to max_depth."""
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def go(tri, depth):
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if depth >= max_depth:
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return [tri]
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centre = np.mean(tri, axis=0)
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if density(centre[0], centre[1]) < threshold:
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return [tri]
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return [out for part in split4(tri) for out in go(part, depth + 1)]
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return [out for tri in tris for out in go(tri, 0)]
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def sampler(field):
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"""Looks a numpy field up at unit coordinates, for use as a density."""
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n = field.shape[0]
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return lambda x, y: float(field[int(np.clip(y * n, 0, n - 1)), int(np.clip(x * n, 0, n - 1))])
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def feature_density(size=192):
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"""High where the pattern bends, which is where feature-adaptive refinement spends triangles.
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One large copy of the motif rather than a field of them: the point is that the triangles gather
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somewhere and not elsewhere, and a pattern that bends everywhere has no elsewhere to show.
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"""
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m = motif(1, size)
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gy, gx = np.gradient(m)
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g = blur(np.hypot(gx, gy), 2)
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return g / max(g.max(), 1e-6)
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def irregular_mesh(seed=3):
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"""The uneven mesh a model arrives with: coarse here, fine there, nothing of one size."""
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rng = np.random.default_rng(seed)
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tris = tri_mesh(4, jitter=0.9, seed=seed)
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out = []
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for t in tris:
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out.extend(split4(t) if rng.random() < 0.45 else [t])
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final = []
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for t in out:
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final.extend(split4(t) if rng.random() < 0.3 else [t])
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return final
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def snap_to_crease(tris, crease, distance=0.07):
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"""Pulls every vertex near the crease onto it, so mesh edges run along it instead of across."""
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(x0, y0), (x1, y1) = crease
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d = np.array([x1 - x0, y1 - y0], float)
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d /= np.linalg.norm(d)
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def snap(p):
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t = np.dot(p - np.array([x0, y0]), d)
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foot = np.array([x0, y0]) + t * d
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return foot if np.linalg.norm(p - foot) < distance else p
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return [tuple(snap(np.asarray(v, float)) for v in t) for t in tris]
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def sliver_mesh(seed=5):
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"""A mesh carrying the thin triangles refinement inherits from a model's own triangulation."""
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rng = np.random.default_rng(seed)
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tris = tri_mesh(7, jitter=0.4, seed=seed)
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out = []
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for t in tris:
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if rng.random() < 0.45:
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a, b, c = (np.asarray(v, float) for v in t)
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mid = (b + c) * 0.5
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a = mid + (a - mid) * 0.08 # all but flattened onto the opposite edge
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out.append((a, b, c))
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else:
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out.append(t)
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return out
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def draw_profile(draw, size, height_1d, baseline=0.62, amplitude=0.30):
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"""A side view of a surface, as a filled region under its profile."""
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n = len(height_1d)
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top = [(i / (n - 1.0) * size, (baseline - (height_1d[i] - 0.5) * amplitude) * size) for i in range(n)]
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draw.polygon(top + [(size, size * 1.1), (0, size * 1.1)], fill=_rgb255((0.44, 0.46, 0.47)))
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draw.line(top, fill=_rgb255((0.82, 0.88, 0.87)), width=max(1, int(1.8 * SS)))
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def bayer(size, n=4):
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"""An ordered dither matrix tiled over the picture, for the mixing illustrations."""
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m = np.array([[0]])
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while m.shape[0] < n:
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m = np.block([[4 * m, 4 * m + 2], [4 * m + 3, 4 * m + 1]])
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m = (m + 0.5) / m.size
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return np.tile(m, (size // m.shape[0] + 1, size // m.shape[1] + 1))[:size, :size]
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def levels_image(levels, dither=False, speckle=0.0, size=SIZE, seed=11):
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"""A smooth ramp reduced to a handful of greys - what a bake does to a photograph's colours.
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Flat rather than lit: this family of settings is about which filament a pixel ends up as, and a
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relief would only add a second thing changing between two pictures that are meant to differ in
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one.
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"""
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x, y = grid(size)
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ramp = np.clip(0.5 + 0.5 * np.cos(2.0 * np.pi * (x + 0.25 * y)), 0.0, 1.0)
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noise = bayer(size) - 0.5 if dither else 0.0
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q = np.round(np.clip(ramp + noise / max(levels - 1, 1), 0.0, 1.0) * (levels - 1)) / (levels - 1)
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if speckle > 0.0:
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rng = np.random.default_rng(seed)
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hit = rng.random((size, size)) < speckle
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q = np.where(hit, rng.integers(0, levels, (size, size)) / (levels - 1), q)
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grey = 0.16 + 0.62 * q
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return (np.dstack([grey, grey * 1.03, grey * 1.02]).clip(0.0, 1.0) * 255.0 + 0.5).astype(np.uint8)
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def draw_mesh_lines(draw, size, tris, colour=(0.90, 0.94, 0.94), width=0.8):
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"""Only the edges, for drawing a mesh over a picture of the surface it sits on."""
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for t in tris:
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pts = [_px(p, size) for p in t]
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draw.line(pts + [pts[0]], fill=_rgb255(colour), width=max(1, int(width * SS)))
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def draw_line(draw, size, segment, colour=(0.97, 0.99, 0.99)):
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a, b = _px(segment[0], size), _px(segment[1], size)
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draw.line([a, b], fill=_rgb255((0.08, 0.09, 0.10)), width=max(1, int(4.0 * SS)))
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draw.line([a, b], fill=_rgb255(colour), width=max(1, int(1.4 * SS)))
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def posterize(rgb, levels):
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"""The shaded picture reduced to flat bands - what the fast preview's per-fragment quantizing
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does to a surface that the real preview shades smoothly."""
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v = rgb.astype(float) / 255.0
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return (np.round(v * (levels - 1)) / (levels - 1) * 255.0 + 0.5).astype(np.uint8)
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def with_checker(rgb, squares=10, strength=0.30, warp=False):
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"""A checker laid over the surface, evenly or stretched.
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Even squares are what the Checker view is for - a texture laid out without stretching. The warped
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version is the same squares through a mapping that does stretch, which is what the Distortion view
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is there to find: cells crowded in one place and pulled apart in another.
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"""
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size = rgb.shape[0]
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x, y = grid(size)
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u, v = (np.sign(x) * np.abs(2.0 * x) ** 2.4 * 0.5, y * (1.0 + 0.9 * np.abs(x))) if warp else (x, y)
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cells = (np.floor((u + 0.5) * squares) + np.floor((v + 0.5) * squares)) % 2.0
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return (rgb * (1.0 - strength * cells)[..., None]).astype(np.uint8)
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def projected_sphere(kind, size=SIZE, squares=9):
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"""A ball with a checker laid on it by one of the panel's projections.
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||||
|
||||
One shape, five mappings: what differs between the pictures is only where the squares go, which is
|
||||
the whole of what choosing a projection does. A sphere is the shape that shows it - every one of
|
||||
these mappings is well behaved on a flat face and tells itself apart on a curved one.
|
||||
"""
|
||||
a = (np.arange(size) + 0.5) / size * 2.24 - 1.12
|
||||
x, y = np.meshgrid(a, a)
|
||||
inside = x * x + y * y <= 1.0
|
||||
z = np.sqrt(np.clip(1.0 - x * x - y * y, 0.0, 1.0))
|
||||
|
||||
lam = np.clip(x * LIGHT[0] + y * LIGHT[1] + z * LIGHT[2], 0.0, 1.0)
|
||||
rgb = SHADOW + (HIGHLIGHT - SHADOW) * (lam ** 0.85)[..., None]
|
||||
|
||||
around = np.arctan2(x, z) / (2.0 * np.pi) + 0.5
|
||||
if kind == "sphere":
|
||||
u, v = around, np.arccos(np.clip(-y, -1.0, 1.0)) / np.pi
|
||||
elif kind == "cylinder":
|
||||
u, v = around, (y + 1.0) * 0.5
|
||||
elif kind == "view":
|
||||
u, v = (x + 1.0) * 0.5, (y + 1.0) * 0.5
|
||||
elif kind == "cube":
|
||||
axis = np.argmax(np.abs(np.dstack([x, y, z])), axis=2)
|
||||
u = np.where(axis == 0, z, x)
|
||||
v = np.where(axis == 1, z, y)
|
||||
u, v = (u + 1.0) * 0.5, (v + 1.0) * 0.5
|
||||
else:
|
||||
raise ValueError(kind)
|
||||
|
||||
cells = (np.floor(u * squares * 2.0) + np.floor(v * squares)) % 2.0
|
||||
rgb = rgb * (1.0 - 0.34 * cells)[..., None]
|
||||
rgb = np.where(inside[..., None], rgb, np.array([0.13, 0.14, 0.15]))
|
||||
return (np.clip(rgb, 0.0, 1.0) * 255.0 + 0.5).astype(np.uint8)
|
||||
|
||||
|
||||
def uv_islands(size=SIZE, squares=9, seed=12):
|
||||
"""The flat layout an unwrap produces: the surface cut into islands and laid out side by side.
|
||||
|
||||
Not a projection onto the model like the other four, so not drawn on one - an unwrap is the model
|
||||
carrying its own coordinates, and this is what those look like.
|
||||
"""
|
||||
rng = np.random.default_rng(seed)
|
||||
x, y = grid(size)
|
||||
cells = (np.floor((x + 0.5) * squares * 2.0) + np.floor((y + 0.5) * squares)) % 2.0
|
||||
checker = (np.array([0.40, 0.43, 0.43]) + np.array([0.22, 0.24, 0.24]) * (1.0 - cells)[..., None])
|
||||
|
||||
def blob(centre, radius, lobes):
|
||||
angles = np.linspace(0.0, 2.0 * np.pi, 26, endpoint=False)
|
||||
wobble = 1.0 + 0.22 * np.sin(lobes * angles + rng.random() * 6.0)
|
||||
return [(centre[0] + np.cos(t) * radius * w, centre[1] + np.sin(t) * radius * w)
|
||||
for t, w in zip(angles, wobble)]
|
||||
|
||||
islands = [blob((0.31, 0.32), 0.21, 3), blob((0.72, 0.30), 0.17, 4),
|
||||
blob((0.34, 0.74), 0.17, 4), blob((0.72, 0.71), 0.20, 3)]
|
||||
|
||||
mask = np.asarray(raster(lambda d, px: [d.polygon([(p[0] * px, p[1] * px) for p in island], fill=(255, 255, 255))
|
||||
for island in islands],
|
||||
size, background=(0.0, 0.0, 0.0))).astype(float)[..., 0] / 255.0
|
||||
rgb = checker * mask[..., None] + np.array([0.13, 0.14, 0.15]) * (1.0 - mask)[..., None]
|
||||
out = (np.clip(rgb, 0.0, 1.0) * 255.0 + 0.5).astype(np.uint8)
|
||||
return raster(lambda d, px: [d.polygon([(p[0] * px, p[1] * px) for p in island], outline=_rgb255(INK),
|
||||
width=max(1, int(1.1 * SS)))
|
||||
for island in islands],
|
||||
size, background=out)
|
||||
|
||||
|
||||
def main():
|
||||
os.makedirs(OUT_DIR, exist_ok=True)
|
||||
|
||||
@@ -288,6 +686,108 @@ def main():
|
||||
frames = [profile_view(wave, t, size=GIF_SIZE) for t in sweep]
|
||||
save_gif("midlevel.gif", frames, delay_ms=100)
|
||||
|
||||
# The paint tools, each shown doing the one thing that tells it apart from the others.
|
||||
save_gif("paint.gif", brush_frames(GIF_SIZE, erase=False), delay_ms=110)
|
||||
save_gif("erase.gif", brush_frames(GIF_SIZE, erase=True), delay_ms=110)
|
||||
save_gif("tool_face.gif", face_frames(GIF_SIZE), delay_ms=180)
|
||||
save_gif("tool_smart_fill.gif", flood_frames(GIF_SIZE, creases=[0.63]), delay_ms=110)
|
||||
|
||||
# Brush size: the ring, and what it covers, over one size and back.
|
||||
brush_tris = tri_mesh(9, jitter=0.55, seed=2)
|
||||
brush_cents = centroids(brush_tris)
|
||||
frames = []
|
||||
for i in range(steps):
|
||||
r = 0.07 + 0.16 * (0.5 - 0.5 * np.cos(2.0 * np.pi * i / steps))
|
||||
under = np.linalg.norm(brush_cents - np.array([0.5, 0.5]), axis=1) < r
|
||||
frames.append(raster(lambda d, sz, u=under, rr=r: (draw_mesh(d, sz, brush_tris, u),
|
||||
draw_brush(d, sz, (0.5, 0.5), rr)), GIF_SIZE))
|
||||
save_gif("cursor_size.gif", frames, delay_ms=90)
|
||||
|
||||
# Angle threshold: the same fill, let past one fold and then past both.
|
||||
for name, creases in (("smart_fill_angle_low.png", [0.40, 0.70]), ("smart_fill_angle_high.png", [0.70])):
|
||||
done = flood_frames(SIZE, creases=creases, steps=22, hold=0)[-1]
|
||||
save_png(name, done)
|
||||
|
||||
# Whole model: every face painted, and every face cleared.
|
||||
whole = tri_mesh(9, jitter=0.55, seed=2)
|
||||
save_png("select_all.png", raster(lambda d, sz: draw_mesh(d, sz, whole, np.ones(len(whole), bool)), SIZE))
|
||||
save_png("erase_all.png", raster(lambda d, sz: draw_mesh(d, sz, whole, np.zeros(len(whole), bool)), SIZE))
|
||||
|
||||
# The views the panel offers over the painted area.
|
||||
relief = shade(motif(3))
|
||||
save_png("view_fast.png", posterize(relief, 3))
|
||||
# Checker and Distortion are about how the texture is laid out, not about the texture, so they go
|
||||
# on a plain swell where the checker itself is what there is to look at.
|
||||
plain = shade(0.25 + 0.5 * dome())
|
||||
save_png("view_checker.png", with_checker(plain, squares=7, strength=0.40))
|
||||
save_png("view_distortion.png", with_checker(plain, squares=7, strength=0.40, warp=True))
|
||||
save_png("view_wireframe.png", raster(lambda d, sz: draw_mesh_lines(d, sz, tri_mesh(9, jitter=0.55, seed=2)),
|
||||
SIZE, background=relief))
|
||||
|
||||
# The projections: one ball, the checker put on it five different ways.
|
||||
for kind in ("cube", "cylinder", "sphere", "view"):
|
||||
save_png("map_%s.png" % kind, projected_sphere(kind))
|
||||
save_png("map_unwrap.png", uv_islands())
|
||||
|
||||
# Refinement: where the triangles go, and how many.
|
||||
density_feature = sampler(feature_density())
|
||||
coarse = tri_mesh(3)
|
||||
save_png("adaptive_off.png", raster(lambda d, sz: draw_mesh(d, sz, refine(coarse, lambda x, y: 1.0, 2)), SIZE))
|
||||
save_png("adaptive_on.png", raster(lambda d, sz: draw_mesh(d, sz, refine(coarse, density_feature, 3)), SIZE))
|
||||
|
||||
disc = sampler(painted_area(192, radius=0.34))
|
||||
painted_mesh = refine(coarse, disc, 3)
|
||||
save_png("painted_only_on.png",
|
||||
raster(lambda d, sz: draw_mesh(d, sz, painted_mesh,
|
||||
np.array([disc(*np.mean(t, axis=0)) > 0.5 for t in painted_mesh])), SIZE))
|
||||
everywhere = refine(coarse, lambda x, y: 1.0, 3)
|
||||
save_png("painted_only_off.png",
|
||||
raster(lambda d, sz: draw_mesh(d, sz, everywhere,
|
||||
np.array([disc(*np.mean(t, axis=0)) > 0.5 for t in everywhere])), SIZE))
|
||||
|
||||
# Subdivide: every triangle into four, a step at a time.
|
||||
level = tri_mesh(2)
|
||||
frames = []
|
||||
for _ in range(4):
|
||||
frames.append(raster(lambda d, sz, m=level: draw_mesh(d, sz, m), GIF_SIZE))
|
||||
level = [out for t in level for out in split4(t)]
|
||||
save_gif("subdivide.gif", frames, delay_ms=650)
|
||||
|
||||
# Remesh: the model's own uneven triangulation, rebuilt at one size.
|
||||
save_png("remesh_before.png", raster(lambda d, sz: draw_mesh(d, sz, irregular_mesh()), SIZE))
|
||||
save_png("remesh_after.png", raster(lambda d, sz: draw_mesh(d, sz, tri_mesh(8, jitter=0.35, seed=9)), SIZE))
|
||||
|
||||
# Hard edges: a fold the remesh runs across, against one it lays its edges along.
|
||||
crease = ((0.06, 0.84), (0.94, 0.20))
|
||||
across = tri_mesh(5, jitter=0.45, seed=6)
|
||||
save_png("preserve_edges_off.png",
|
||||
raster(lambda d, sz: (draw_mesh(d, sz, across), draw_line(d, sz, crease)), SIZE))
|
||||
save_png("preserve_edges_on.png",
|
||||
raster(lambda d, sz: (draw_mesh(d, sz, snap_to_crease(across, crease, 0.13)),
|
||||
draw_line(d, sz, crease)), SIZE))
|
||||
|
||||
# Thin triangles, and the same mesh without them.
|
||||
save_png("collapse_slivers_off.png", raster(lambda d, sz: draw_mesh(d, sz, sliver_mesh()), SIZE))
|
||||
save_png("collapse_slivers_on.png", raster(lambda d, sz: draw_mesh(d, sz, tri_mesh(7, jitter=0.4, seed=5)), SIZE))
|
||||
|
||||
# Smoothing the geometry after the texture is in it: the steps relax out of the surface.
|
||||
stepped_profile = np.floor(profile_wave(GIF_SIZE, periods=2.0) * 5.0) / 4.0
|
||||
frames = []
|
||||
for t in sweep:
|
||||
h = stepped_profile.copy()
|
||||
for _ in range(int(round(t * 6))):
|
||||
h = blur(h[None, :], 2)[0]
|
||||
frames.append(raster(lambda d, sz, hh=h: draw_profile(d, sz, hh), GIF_SIZE, background=(0.11, 0.12, 0.13)))
|
||||
save_gif("geometry_smoothing.gif", frames, delay_ms=100)
|
||||
|
||||
# Mixing, how many mixes, and denoise - all about which filament a spot ends up as, so all flat.
|
||||
save_png("mix_off.png", levels_image(4))
|
||||
save_png("mix_on.png", levels_image(4, dither=True))
|
||||
save_png("mixed_colors_few.png", levels_image(3, dither=True))
|
||||
save_png("mixed_colors_many.png", levels_image(8, dither=True))
|
||||
save_png("denoise_off.png", levels_image(5, dither=True, speckle=0.05))
|
||||
save_png("denoise_on.png", levels_image(5, dither=True))
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
main()
|
||||
|
||||
Reference in New Issue
Block a user