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#include "globals.cginc"
#include "math.cginc"
#include "pema99.cginc"
#ifndef __TOONER_SCROLL
#define __TOONER_SCROLL
#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
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