#version 300 es

// fragment shaders don't have a default precision so we need
// to pick one. mediump is a good default. It means "medium precision"
precision mediump float;

in vec3 pos;
uniform vec4 u_color;

out vec4 outColor;

void main() {
    vec3 color = pos.xyz;
    color.z = color.z + 1.0;
    color.z = color.z / 2.0;
    color.z = color.z * 255.0;
    outColor = vec4(color, 1.0);
}