#ifdef GL_ES
precision mediump float;
#endif

// Custom attributes.

uniform sampler2D uColorTex; // Sampler for the color registered data
uniform sampler2D u_v4l2cam;
uniform sampler2D u_gradient;

in vec2 gTexCoord;

void main()
{
    vec2 st = gTexCoord;
    st /= 3;
    st -= vec2(0.5);
    st *= 1.45;
    st += vec2(0.5);
    st.s += 0.15;
    st.t += 0.16;
    float thermo = texture2D(u_v4l2cam, st).r;
    gl_FragColor = vec4(texture2D(u_gradient, vec2(thermo, 0.5)).rgb, 1);
    // gl_FragColor = texture2D(uColorTex, gTexCoord);
    // gl_FragColor = vec4(1);
}