Use if conditions in GLSL to divide the screen into regions and assign different colors based on position.
---
`glsl
if (vUv.x < 0.5) {
color = leftColor;
} else {
color = rightColor;
}
`
A simple branch based on horizontal position.
---
Use vUv.x to identify fragment location:
- Less than 0.5 → left side
- Greater or equal → right side
---
Assign the color and render:
`glsl
gl_FragColor = vec4(color, 1.0);
`
This pattern is useful for UI states, graph regions, and interaction zones.