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Add FPS and boid counters to GPU flocking example #205

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Add FPS and boid counters to GPU flocking example #205

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43c4ac5
Add FPS and boid counters to GPU example
SableRaf Jul 14, 2026
f964bb7
Add fps and boid counters to the duck example
SableRaf Jul 14, 2026
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16 changes: 15 additions & 1 deletion crates/processing_pyo3/examples/flocking_duck.py
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Original file line number Diff line number Diff line change
Expand Up @@ -161,6 +161,9 @@
center = None
extent = 0.0
max_speed = 0.0
boid_count = 0
title_last_time = 0.0
title_last_frame = 0


# Two triangles folded slightly along the nose-tail spine, like a paper
Expand All @@ -185,7 +188,7 @@ def boid_geometry(half_width, length, droop):


def setup():
global p, boid, mat, flock_pass, integrate_pass, center, extent, max_speed
global p, boid, mat, flock_pass, integrate_pass, center, extent, max_speed, boid_count

size(900, 700)
mode_3d()
Expand Down Expand Up @@ -215,6 +218,8 @@ def setup():
# derived from the mesh's bounding box, so the sketch doesn't care what
# units the model was authored in.
homes = p.buffer(Attribute.position()).read()
boid_count = len(homes)
window_title(f"GPU Flocking Duck — {boid_count:,} boids")
lo = [min(v[i] for v in homes) for i in range(3)]
hi = [max(v[i] for v in homes) for i in range(3)]
center = [(lo[i] + hi[i]) * 0.5 for i in range(3)]
Expand Down Expand Up @@ -246,6 +251,15 @@ def setup():


def draw():
global title_last_time, title_last_frame

title_elapsed = elapsed_time - title_last_time
if title_elapsed >= 0.5:
fps = (frame_count - title_last_frame) / title_elapsed
window_title(f"GPU Flocking Duck — {boid_count:,} boids — {fps:.0f} FPS")
title_last_time = elapsed_time
title_last_frame = frame_count

t = elapsed_time * 0.2
r = extent * 1.1
camera_position(center[0] + cos(t) * r, center[1] + extent * 0.35, center[2] + sin(t) * r)
Expand Down
12 changes: 12 additions & 0 deletions crates/processing_pyo3/examples/flocking_gpu.py
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Original file line number Diff line number Diff line change
Expand Up @@ -156,6 +156,8 @@
mat = None
flock_pass = None
integrate_pass = None
title_last_time = 0.0
title_last_frame = 0


# Two triangles folded slightly along the nose-tail spine, like a paper
Expand Down Expand Up @@ -183,6 +185,7 @@ def setup():
global p, boid, mat, flock_pass, integrate_pass

size(900, 700)
window_title(f"GPU Flocking — {BOID_COUNT:,} boids")
mode_3d()

directional_light((0.95, 0.9, 0.85), 800.0)
Expand Down Expand Up @@ -226,6 +229,15 @@ def setup():


def draw():
global title_last_time, title_last_frame

title_elapsed = elapsed_time - title_last_time
if title_elapsed >= 0.5:
fps = (frame_count - title_last_frame) / title_elapsed
window_title(f"GPU Flocking — {BOID_COUNT:,} boids — {fps:.0f} FPS")
title_last_time = elapsed_time
title_last_frame = frame_count

t = elapsed_time * 0.1
r = BOUND * 2.6
camera_position(cos(t) * r, BOUND * 0.8, sin(t) * r)
Expand Down
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