kofigumbs · October 16, 2019 20:37 · Oct 16, 2019
diff --git a/kodelife-image-animation.glsl b/kodelife-image-animation.glsl
@@ -0,0 +1,42 @@
+#version 150
+
+uniform float time;
+uniform vec2 resolution;
+uniform sampler2D bitmoji;
+
+in VertexData
+{
+    vec4 v_position;
+    vec3 v_normal;
+    vec2 v_texcoord;
+} inData;
+
+out vec4 fragColor;
+
+vec2 dance(float time, vec2 uv, vec2 point, vec2 offset) {
+    int animSteps = 60;
+    float animDist = 0.003;
+    vec2 diff = abs(uv - point);
+    vec2 value = vec2(0.);
+    for(int i = 0; i < animSteps; i++) {
+        if (diff.y < i*animDist) {
+            value.x += offset.x*time;
+        }
+        if (diff.x < i*animDist) {
+            value.y += offset.y*time;
+        }
+    }
+    return value;
+}
+
+void main(void)
+{
+    vec2 uv = inData.v_texcoord;
+    vec2 img = vec2(uv.x, 1-uv.y);
+
+    img += dance(sin(time*4)/4, uv, vec2(0.5, 0.7), vec2(0., 0.0002));
+    img += dance(sin(time*8),   uv, vec2(0.5, 0.3), vec2(0.0003, 0.));
+    img += dance(cos(time*16),  uv, vec2(0.5, 0.),  vec2(0., 0.0001));
+
+    fragColor = texture(bitmoji, img);
+}