Wes Pearce

NSString *const kSPHTradeFragmentShader = SHADER_STRING(
    precision highp float;

    varying vec2 vTextureCoord;
    varying vec4 vColor;

    varying float vTimeOffset;
    varying float vIntensity;
    varying float vSpeed;
    varying float vPeriodicity;

    uniform sampler2D uSampler;
    uniform float uTime;

    void main(void) {
        highp float time = uTime + vTimeOffset;
        vec4 textureColor = texture2D(uSampler, vec2(vTextureCoord.x, (vTextureCoord.y * vPeriodicity) + (time * vSpeed)));
        gl_FragColor = vec4(vColor.rgb, textureColor.a * vIntensity);
    }
);