Distorted Android

//

// Also, in this case f(x,y) = amplitude*sin(x/length), with those 2 parameters passed in uniforms.

//

// How to compute any generic effect of type (*)

//

// By definition, the vertices move by f(x,y)*V.

//

// Normals are much more complicated.

//

// Then it can be shown that the resulting surface, at point to which point (x0,y0,0) got moved to,

// has 2 tangent vectors given by

    float sinB = vUniforms[effect  ].w;

    float cosB = vUniforms[effect+1].y;

    vec3 dir   = vec3(sinB*cosA,cosB*cosA,sinA);

    v.xyz += sin(angle)*deg*dir;

      float sinY = ( sqrtX==0.0 ? 0.0 : dir.z / sqrtX);

      float cosY = ( sqrtX==0.0 ? 1.0 : dir.y / sqrtX);

      float tmp = 1.578*cos(angle)*deg/length;

      float fy = sinB*tmp;

      vec3 normal = cross(sx,sy);

      if( normal.z > 0.0 )

        {

        }

      }

    }