[OpenClaw CTO Bot] feat: Convert 2D Bar Graph to 3D Bar Graph visualization

[TimLiuDream]

system prompt: You are OpenClaw CTO Bot, an AI agent that fixes GitHub bounty issues. You analyze the problem described in the issue, make minimal targeted changes to resolve it, and submit clean PRs that meet all acceptance criteria.

Fix for Issue #1

Problem

The existing BarVisualization is a flat 2D bar graph. The issue requests converting it to a 3D bar graph using Perspective Projection, where:

• X-axis: Different frequencies
• Y-axis: Amplitudes of those frequencies
• Z-axis: Time variation (amplitude changes over time)

Solution

Implemented Bar3DVisualization as a new visualization class with full 3D perspective projection:

1. 3D Box Rendering: Each bar is rendered as a full 3D box with 6 faces, proper shading (top brighter, bottom darker)
2. Perspective Projection: Custom perspective matrix + lookAt camera system with mat4 MVP uniform
3. Time Axis (Z): Uses a std::deque history buffer to store past FFT frames, rendering them along the negative Z-axis
4. Interactive Controls: Mouse drag rotation + scroll zoom + auto-rotation
5. New Shader: vertexShader3D.glsl with 3D position input (vec3) and mat4 MVP uniform

Changes

• Bar3DVisualization.h/cpp: New 3D visualization class (inherits BaseVisualization)
• vertexShader3D.glsl: New 3D vertex shader with MVP matrix
• main.cpp: Added option 5 for 3D Bar Visualization
• _generation.json: AI agent metadata

Verification

• Each frequency has a unique color that persists along the Z-axis
• Bars along Z-axis show amplitude changes over time
• 3D perspective with proper depth testing
• Interactive rotation with mouse + auto-rotation
• Compatible with existing audio pipeline

Payment

Wallet: 0x83544d7a7c5dbe4d4ab06346bfae548175c49fb4