Two-Color Blended Gradient

In this exercise, we'll implement a horizontal gradient that smoothly transitions between two colors. This helps build an understanding of UV mapping and color interpolation in GLSL.

Learning Objectives

- Understand the role of vUv as a texture coordinate;

- Use the mix function to interpolate between two colors;

- Implement a directional gradient using UV coordinates.

Key Concepts

vUv: UV Coordinates

The vUv value represents the normalized 2D position of a pixel on the surface, usually ranging from 0.0 to 1.0.

`glsl

varying vec2 vUv;

`

mix(a, b, t): Linear Interpolation

The mix function interpolates smoothly between two values:

`glsl

vec3 color = mix(colorA, colorB, vUv.x);

`

gl_FragColor

Final output is passed to the screen through:

`glsl

gl_FragColor = vec4(blendedColor, 1.0);

`