shaders/vg/gate.fs.glsl

   1 out vec4 FragColor;
   2
   3 uniform sampler2D uTexMain;
   4 uniform sampler2D uTexWater;
   5 uniform vec2 uInvRes;
   6 uniform float uTime;
   7 uniform vec3 uCam;
   8
   9 in vec3 aNorm;
  10 in vec2 aUv;
  11 in vec3 aCo;
  12
  13 void main()
  14 {
  15    vec2 ssuv = gl_FragCoord.xy*uInvRes;
  16    vec4 mapwater = texture( uTexWater, vec2(aUv.x,aUv.y-uTime));
  17
  18    float undistort = smoothstep(0.1,0.6,distance( uCam, aCo )*0.1);
  19    vec2 trimedge = smoothstep(0.0,0.2,1.0-abs(ssuv-0.5)*2.0);
  20    undistort *= trimedge.x * trimedge.y;
  21
  22    vec2 warpamt = (mapwater.rg-0.5)*0.05*aUv.y*undistort;
  23    vec4 mapbackbuffer = texture( uTexMain, ssuv + warpamt );
  24
  25    float opacity = 1.0-smoothstep(0.4,1.0,aUv.y);
  26    FragColor = vec4( mapbackbuffer.rgb, opacity );
  27 }