refactor: split frag0 into multiple files

default/inc_magic.glsl

@@ -0,0 +1,71 @@
+#include inc_time.glsl
+
+#ifndef INC_MAGIC
+#define INC_MAGIC
+
+uniform int iDemo;
+
+vec2 magic_f(vec2 F, vec3 B, float i)
+{
+    return vec2(
+        mix(F.x, randTime(i + 1), min(1, B.z + iDemo)),
+        mix(F.y, randTime(i + 2), min(1, B.z + iDemo))
+    );
+}
+
+vec2 magic_f(float i)
+{
+    return magic_f(vec2(0), vec3(0, 0, 1), i);
+}
+
+vec3 magic_b(vec3 B, float i)
+{
+    return vec3(
+        mix(B.x, step(0.2, randTime(i + 3)), min(1, B.z + iDemo)),
+        mix(B.y, step(0.5, randTime(i + 4)), min(1, B.z + iDemo)),
+        min(1, B.z + iDemo)
+    );
+}
+
+vec3 magic_b(float i)
+{
+    return magic_b(vec3(0, 0, 1), i);
+}
+
+bool magic_trigger(vec3 B, float i)
+{
+    return magic_b(B, i).x > 0;
+}
+
+bool magic_trigger(float i)
+{
+    return magic_b(i).x > 0;
+}
+
+float magic(vec2 F, vec3 B, float i)
+{
+    vec2 f = magic_f(F, B, i);
+    vec3 b = magic_b(B, i);
+
+    return mix(0, f.x * mix(1 - modTime(f.y), cosTime(f.y) * 0.5 + 0.5, b.y), b.x);
+}
+
+float magic(float i)
+{
+    return magic(vec2(0), vec3(0, 0, 1), i);
+}
+
+float magic_reverse(vec2 F, vec3 B, float i)
+{
+    vec2 f = magic_f(F, B, i);
+    vec3 b = magic_b(B, i);
+
+    return mix(0, f.x * mix(1 - modTime(f.y), modTime(f.y), b.y), b.x);
+}
+
+float magic_reverse(float i)
+{
+    return magic_reverse(vec2(0), vec3(0, 0, 1), i);
+}
+
+#endif