gradient shader 1

// Author: Jeremy Rotsztain
// Course: ShaderArt (DIGF-3011, Winter 2022)
// Title: RGB Gradients

// Edited by: Amanda Huynh Feb 9 2022

#ifdef GL_ES
precision mediump float;
#endif

uniform vec2 u_resolution;
uniform vec2 u_mouse;
uniform float u_time;

void main() {

    // normalize our canvas
    vec2 st = gl_FragCoord.xy/u_resolution.xy;

    // normalize our mouse position
    vec2 mouseXY = u_mouse / u_resolution;

    // set color #1 manually (peach)
    vec3 red = vec3(1.664,0.009,0.280);

    // pick color #2 manually (blue)
    vec3 blue = vec3(0.037,0.081,2.128);

    // change the 'space' where the gradient changes
    // using GLSL "shaping functions"
    vec3 color = mix( red, blue, smoothstep( 0.032,0.5*2.224, st.x));

    gl_FragColor = vec4(color,1.0);
}