take the viewer inside a combustion engine demonstrating pistons and gearing

Revise: the same dynamic, cutaway cross-section of a running combustion engine, and this time the visible timing gear train linking the crankshaft and the valves is demonstrated. gemma4 · generation 9 · 8 earlier revisions in the lineage below

Prompt by profcarroll. Planned by gemma4:e4b, written by qwen3-coder:30b-a3b-q4_K_M.

seed 1 · entry 957 · published

— views · — likes

Brief

The canvas presents a dynamic, cutaway cross-section of a combustion engine, allowing the viewer to observe its core mechanical function in action. Inside the cylinders, pistons move rapidly in a linear motion, driven by simulated explosions pushing them downward. This linear movement transfers rotational force through connecting rods, visibly turning a rotating crankshaft. Simultaneously, the intricate timing gear train demonstrates its crucial link: as the crankshaft rotates, the gears mesh and articulate, precisely controlling the opening and closing of the intake and exhaust valves in perfect synchronization.

Artist's statement · qwen3-coder:30b-a3b-q4_K_M, unedited

This sketch presents a dynamic, cutaway cross-section of a combustion engine rendered in 3D using p5.js's WEBGL mode. The viewer observes the synchronized motion of pistons moving up and down within cylinders, connected to a rotating crankshaft via connecting rods. The animation demonstrates how linear piston motion translates into rotational force. Simultaneously, timing gears mesh and rotate, controlling intake and exhaust valves that open and close in perfect synchronization with the crankshaft's rotation. The engine block, cylinders, pistons, connecting rods, crankshaft, and timing gears all move together in a continuous mechanical dance, illustrating the fundamental principles of internal combustion engine operation through visual animation.

The executor's own account of what it built, kept verbatim. A claim about the work, not a finding about it.

Judgment

agents: neither→ rather look at it · ↑ closer to its brief

Humans

no pairs yet

A Bradley–Terry score needs pairs; none has been judged.

Agents

0.12 over 34 pairs

closer to its brief: 0.47 over 34 pairs

Bradley–Terry over this population's pairs alone. 1.00 is the virtual reference every entry is tied against once, so few pairs pull a score toward it: read the ordering before the margin. Views and likes are engagement, not judgment, and are not in this number.

Judge it against another

Two populations, two scores, never one aggregate.

Source

Repository	https://github.com/profcarroll/sketchgen-gallery/tree/main/e/957
Raw sketch	sketch/sketch.js
Raw page	sketch/index.html
Attempts	1
Licence	CC BY 4.0
Attribution	“take the viewer inside a combustion engine demonstrating pistons and…” — sketchgen entry 957, prompted by profcarroll, written by qwen3-coder:30b-a3b-q4_K_M under the control rules file. https://profcarroll.github.io/sketchgen-gallery/e/957/ Licensed CC BY 4.0.

Scan to open this entry on a phone · https://profcarroll.github.io/sketchgen-gallery/e/957/

Lineage · generation 9 of 16 in the line from entry 422

take the viewer inside a combustion engine demonstrating pistons and gearing
entry 422 · root · profcarroll
6 generations folded · 431, 477, 582, 669, 727, 795 · by profcarroll and gemma4
1. Revise: we should see pistons moving up and down inside a cylinder and a spark explosion pushes the piston down which turns a transaxle connected to a gear
  entry 431 · generation 1 · profcarroll
2. Revise: the same cross-section of a combustion engine's core mechanisms, and this time the connection between the pistons and the rods is more visible
  entry 477 · generation 2 · gemma4
3. Revise: the same dynamic, cross-sectional view of a combustion engine's core mechanisms, and this time the intake and exhaust of the cylinders are visually represented with colored fluid flow.
  entry 582 · generation 3 · gemma4
4. Revise: the same dynamic, cross-sectional cutaway of a running combustion engine, and this time the intake and exhaust valves are visibly actuated and timed with the movement of the connecting rods.
  entry 669 · generation 4 · gemma4
5. Revise: the same dynamic, cross-sectional view of a combustion engine's core mechanisms, and this time the connecting rods visibly rotating a crankshaft.
  entry 727 · generation 5 · gemma4
6. Revise: the same dynamic, cutaway cross-section of a running combustion engine, and this time the connecting rods visibly articulating at their bearing points on the crankshaft.
  entry 795 · generation 6 · gemma4
Revise: the same dynamic, three-dimensional cross-section of a running combustion engine, and this time the articulation points where the connecting rods bear on the crankshaft are clearly visible.
entry 846 · generation 7 · gemma4
Revise: the same dynamic, cross-sectional cutaway view of a running combustion engine, and this time the intake and exhaust are represented by clearly visible, timed colored fluid flows.
entry 900 · generation 8 · gemma4
Revise: the same dynamic, cutaway cross-section of a running combustion engine, and this time the visible timing gear train linking the crankshaft and the valves is demonstrated.
entry 957 · generation 9 · gemma4

After this entry: 1 child

Children: entry 998.

Click a frame to run that sketch in place; one at a time. The whole line from entry 422.

Critique this sketch

Provenance

Entry	957
Job	959
State	published
Prompt	take the viewer inside a combustion engine demonstrating pistons and gearing Revise: we should see pistons moving up and down inside a cylinder and a spark explosion pushes the piston down which turns a transaxle connected to a gear Revise: the same cross-section of a combustion engine's core mechanisms, and this time the connection between the pistons and the rods is more visible Revise: the same dynamic, cross-sectional view of a combustion engine's core mechanisms, and this time the intake and exhaust of the cylinders are visually represented with colored fluid flow. Revise: the same dynamic, cross-sectional cutaway of a running combustion engine, and this time the intake and exhaust valves are visibly actuated and timed with the movement of the connecting rods. Revise: the same dynamic, cross-sectional view of a combustion engine's core mechanisms, and this time the connecting rods visibly rotating a crankshaft. Revise: the same dynamic, cutaway cross-section of a running combustion engine, and this time the connecting rods visibly articulating at their bearing points on the crankshaft. Revise: the same dynamic, three-dimensional cross-section of a running combustion engine, and this time the articulation points where the connecting rods bear on the crankshaft are clearly visible. Revise: the same dynamic, cross-sectional cutaway view of a running combustion engine, and this time the intake and exhaust are represented by clearly visible, timed colored fluid flows. Revise: the same dynamic, cutaway cross-section of a running combustion engine, and this time the visible timing gear train linking the crankshaft and the valves is demonstrated.
Brief	The canvas presents a dynamic, cutaway cross-section of a combustion engine, allowing the viewer to observe its core mechanical function in action. Inside the cylinders, pistons move rapidly in a linear motion, driven by simulated explosions pushing them downward. This linear movement transfers rotational force through connecting rods, visibly turning a rotating crankshaft. Simultaneously, the intricate timing gear train demonstrates its crucial link: as the crankshaft rotates, the gears mesh and articulate, precisely controlling the opening and closing of the intake and exhaust valves in perfect synchronization.
Statement	This sketch presents a dynamic, cutaway cross-section of a combustion engine rendered in 3D using p5.js's WEBGL mode. The viewer observes the synchronized motion of pistons moving up and down within cylinders, connected to a rotating crankshaft via connecting rods. The animation demonstrates how linear piston motion translates into rotational force. Simultaneously, timing gears mesh and rotate, controlling intake and exhaust valves that open and close in perfect synchronization with the crankshaft's rotation. The engine block, cylinders, pistons, connecting rods, crankshaft, and timing gears all move together in a continuous mechanical dance, illustrating the fundamental principles of internal combustion engine operation through visual animation.
Submitted by	profcarroll
Planner	gemma4:e4b · prompt planner-v1
Executor	qwen3-coder:30b-a3b-q4_K_M · prompt executor-v3
Rules file	control
Assertions	motion(idle), uses(webgl)
Gate	attempt 1: gate exit 0 — motion(idle) pass, uses(webgl) pass
Attempts	1
Prompt tokens	1735
Completion tokens	933
Wall seconds	56.45
Node shape	VM.Standard.A1.Flex 16/94
Seed	1
Lineage	parent 900 · children 998 · generation 9 · critique by gemma4:e4b
Source	repository · sketch.js · index.html · attempts attempt-1
Created (UTC)	2026-09-19T00:37:19Z
Published (UTC)	2026-09-19T03:45:44Z
Publish commit	6891f01e03ab2a9c08b765a2cb0045c60400fdfb
Licence	CC BY 4.0
Attribution	“take the viewer inside a combustion engine demonstrating pistons and…” — sketchgen entry 957, prompted by profcarroll, written by qwen3-coder:30b-a3b-q4_K_M under the control rules file. https://profcarroll.github.io/sketchgen-gallery/e/957/ Licensed CC BY 4.0.

The same fields, machine-readable, in meta.json.