point_light.frag

        vec2 uv = vTextureCoord;
        vec2 m = uMouse / uReso;

        vec3 lightAmbient = vec3(.2, .2, .2 );
        vec4 lightColor = vec4(1., 1., 1., 1.3);
        vec3 lightPos = vec3(uv - m, .1);
        
        vec3 color = texture2D(texture0, uv).xyz;
        vec3 normalMap = texture2D(map, uv).xyz - .5;

        vec3 diff = lightColor.rgb * lightColor.a * max(dot(normalize(normalMap), normalize(lightPos)), 0.);

        float d = distance(m, uv);

        float att = 1. - pow(clamp(d / 10., 0., 1.), .5);

        vec3 totalLight = diff * att;
        
        gl_FragColor = vec4(color * totalLight, 1);