uniform mat4 u_Color;
varying vec2 v_TexCoord;
varying vec2 v_TexCoord2;
varying vec2 v_TexCoord3;
varying vec2 v_Position;
uniform sampler2D u_Tex0;
uniform sampler2D u_Tex1;
uniform float u_Time;
uniform vec2 u_Resolution;

vec2 direction = vec2(0.9,0.3);
float speed = 0.2;
float pressure = 1.0;
float zoom = 3.0;

float r = 0.0;
float g = 1.0;
float b = 0.0;
float mode = 1.0;

void main()
{
    gl_FragColor = texture2D(u_Tex0, v_TexCoord);

    vec2 offset = (v_TexCoord + (direction * u_Time * speed)) / zoom;
    vec3 bgcol = texture2D(u_Tex0, v_TexCoord).xyz;
    vec3 fogcol = texture2D(u_Tex1, offset).xyz;
    vec3 col = bgcol + fogcol*pressure;
	vec4 color = texture2D(u_Tex0, v_TexCoord);

    vec4 texcolor2 = texture2D(u_Tex0, v_TexCoord3);
    if(gl_FragColor.a < 0.01) {
        if(texcolor2.a > 0.01) {
            gl_FragColor = vec4(r, g, b, mode);
        } else {
            discard;
        }
    }


    gl_FragColor = mix(gl_FragColor, vec4(col, color.a), 0.5);
    vec4 texcolor = texture2D(u_Tex0, v_TexCoord2);
    if(texcolor.r > 0.9) {
        gl_FragColor *= texcolor.g > 0.9 ? u_Color[0] : u_Color[1];
    } else if(texcolor.g > 0.9) {
        gl_FragColor *= u_Color[2];
    } else if(texcolor.b > 0.9) {
        gl_FragColor *= u_Color[3];
    }
    if(gl_FragColor.a < 0.01) discard;
}