X-Git-Url: https://harrygodden.com/git/?a=blobdiff_plain;f=shaders%2Fvg%2Fgate.fs.glsl;fp=shaders%2Fvg%2Fgate.fs.glsl;h=ba48f1efdf6f64a0fafc797560af42f70fa6b2c0;hb=ecc4dfbfb3adf91d2dfc03ba0ec9a821fcc2390c;hp=0000000000000000000000000000000000000000;hpb=3bb0287d544a4cb75de9afe2927ac8e946f3a18e;p=carveJwlIkooP6JGAAIwe30JlM.git

diff --git a/shaders/vg/gate.fs.glsl b/shaders/vg/gate.fs.glsl
new file mode 100644
index 0000000..ba48f1e
--- /dev/null
+++ b/shaders/vg/gate.fs.glsl
@@ -0,0 +1,27 @@
+out vec4 FragColor;
+
+uniform sampler2D uTexMain;
+uniform sampler2D uTexWater;
+uniform vec2 uInvRes;
+uniform float uTime;
+uniform vec3 uCam;
+
+in vec3 aNorm;
+in vec2 aUv;
+in vec3 aCo;
+
+void main()
+{
+   vec2 ssuv = gl_FragCoord.xy*uInvRes;
+   vec4 mapwater = texture( uTexWater, vec2(aUv.x,aUv.y-uTime));
+
+   float undistort = smoothstep(0.1,0.6,distance( uCam, aCo )*0.1);
+   vec2 trimedge = smoothstep(0.0,0.2,1.0-abs(ssuv-0.5)*2.0);
+   undistort *= trimedge.x * trimedge.y;
+
+   vec2 warpamt = (mapwater.rg-0.5)*0.05*aUv.y*undistort;
+   vec4 mapbackbuffer = texture( uTexMain, ssuv + warpamt );
+
+   float opacity = 1.0-smoothstep(0.4,1.0,aUv.y);
+   FragColor = vec4( mapbackbuffer.rgb, opacity );
+}