Initial commit

Code bomb. Put tooner in version control.

1 files changed, 47 insertions, 0 deletions

diff --git a/tooner_scroll.cginc b/tooner_scroll.cginc
new file mode 100644
index 0000000..1fd29cb
--- /dev/null
+++ b/tooner_scroll.cginc
@@ -0,0 +1,47 @@
+#ifndef __TOONER_SCROLL
+#define __TOONER_SCROLL
+
+#include "globals.cginc"
+#include "math.cginc"
+#include "pema99.cginc"
+
+#if 0
+float _Scroll_Toggle;
+float _Scroll_Top;
+float _Scroll_Bottom;
+float _Scroll_Width;
+float _Scroll_Strength;
+float _Scroll_Speed;
+#endif
+
+float3 applyScroll(float3 p, float3 n, float3 avg_pos) {
+#if defined(_SCROLL)
+  float phase = glsl_mod(_Time[1] * _Scroll_Speed, 1.0);
+
+  float z1 = _Scroll_Top;
+  float z0 = _Scroll_Bottom;
+  float zc = (z1 - z0) * phase + z0;
+
+  float3 op = mul(unity_WorldToObject, float4(p, 1)).xyz;
+
+  float offset =
+    1 / (1 + pow(.5 * (zc - op.y) / _Scroll_Width, 6));
+
+  p -= avg_pos;
+  float3 axis = normalize(float3(
+      rand((int) p.x * 1.0E6),
+      rand((int) p.y * 1.0E6),
+      rand((int) p.z * 1.0E6)));
+  float theta = offset * .5;
+  float4 quat = get_quaternion(axis, theta);
+  p = rotate_vector(p, quat);
+  p += avg_pos;
+
+  return p + n * offset * _Scroll_Strength;
+#else
+  return p;
+#endif  // _SCROLL
+}
+
+#endif  // __TOONER_SCROLL
+