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Added VFEZ

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MaddoScientisto 2025-03-09 15:58:26 +01:00
commit 6d572503cb
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26
VFEZ/Shaders/Effects/vfez_uv_twist.gdshaderinc Normal file
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group_uniforms uv_twist;
uniform float uv_twist_amount: hint_range(0.0, 3.1415) = 1.;
uniform float uv_twist_pos_x: hint_range(0.0, 1.0) = 0.5;
uniform float uv_twist_pos_y: hint_range(0.0, 1.0) = 0.5;
uniform float uv_twist_radius: hint_range(0.0, 3.0) = 0.75;
group_uniforms;
vec2 uv_twist(
vec2 uv,
vec2 main_texture_scale)
{
vec2 twistUV = uv - vec2(uv_twist_pos_x * main_texture_scale.x,
uv_twist_pos_y * main_texture_scale.y);
float twist_radius = uv_twist_radius *
(main_texture_scale.x + main_texture_scale.y) / 2.;
float percent = (twist_radius - length(twistUV)) / twist_radius;
float theta = percent * percent * (2.0 * sin(uv_twist_amount)) * 8.0;
float s = sin(theta);
float c = cos(theta);
float beta = max(sign(twist_radius - length(twistUV)), 0.);
twistUV = vec2(dot(twistUV, vec2(c, -s)), dot(twistUV, vec2(s, c))) * beta + twistUV * (1. - beta);
twistUV += vec2(uv_twist_pos_x * main_texture_scale.x,
uv_twist_pos_y * main_texture_scale.y);
uv = twistUV;
return uv;
}