obs-StreamFX/data/examples/shaders/source/shadertoy-Xsl3RX.effect

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// Target with smoothstep by possum
// https://www.shadertoy.com/view/Xsl3RX
// License Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
// Contact the author for other licensing options
// type conversion
#define vec2 float2
#define vec3 float3
#define vec4 float4
#define ivec2 int2
#define ivec3 int3
#define ivec4 int4
#define mat2 float2x2
#define mat3 float3x3
#define mat4 float4x4
#define fract frac
#define mix lerp
#define iTime Time.x
#define iResolution ViewSize
// Always provided by OBS
uniform float4x4 ViewProj<
bool automatic = true;
string name = "View Projection Matrix";
>;
// Provided by Stream Effects
uniform float4 Time<
// x: Time in seconds since the source was created.
// y: Time in the current second.
// z: Total seconds passed since the source was created.
// w: Reserved
bool automatic = true;
string name = "Time Array";
string description = "A float4 value containing the total time, rendering time and the time since the last tick. The last value is a random number between 0 and 1.";
>;
uniform float4 ViewSize<
// x: Width
// y: Height
// z: 1. / Width
// w: 1. / Height
bool automatic = true;
>;
uniform texture2d InputA<
bool automatic = true;
>;
uniform float4x4 Random<
bool automatic = true;
string name = "Random Array";
string description = "A float4x4 value containing random values between 0 and 1";
>;
// Shader Parameters
uniform float pRings<
string name = "Rings";
string field_type = "slider";
float minimum = 1.0;
float maximum = 50.0;
float step = 0.01;
float scale = 1.;
> = 5.0;
uniform float pVelocity<
string name = "Ring Velocity";
string field_type = "slider";
float minimum = 0.1;
float maximum = 10.0;
float step = 0.01;
float scale = 1.;
> = 1.0;
uniform float pBorder<
string name = "Border Size";
string field_type = "slider";
float minimum = 0.1;
float maximum = 100.0;
float step = 0.1;
float scale = 0.001;
> = 1.;
// convenience values
#define PI 3.1415926f
#define TAU 6.2831853f
#define TwoPI 6.2831853f
#define HalfPI 1.5707963f
#define deg30 0.20943951
float mod(float x, float y) {
return x - y * floor(x / y);
}
// ---------- Shader Code
sampler_state def_sampler {
Filter = Linear;
AddressU = Clamp;
AddressV = Clamp;
};
sampler_state imageSampler {
Filter = Point;
AddressU = Clamp;
AddressV = Clamp;
};
struct VertFragData {
float4 pos : POSITION;
float2 uv : TEXCOORD0;
};
VertFragData VSDefault(VertFragData vtx) {
vtx.pos = mul(float4(vtx.pos.xyz, 1.0), ViewProj);
return vtx;
}
void mainImage( out vec4 fragColor, in vec2 fragCoord )
{
float2 position = fragCoord.xy / ViewSize.xy;
float aspect = ViewSize.x / ViewSize.y;
position.x *= aspect;
float dist = distance(position, float2( aspect * 0.5, 0.5));
float offset = Time.x * pVelocity;
float conv = pRings * 1.;
float v = dist * conv - offset;
float ringr = floor(v);
float ringv = abs( dist - (ringr + float( frac(v) > 0.5) + offset) / conv);
float color = smoothstep( -pBorder, pBorder, ringv);
if ( mod(ringr, 2.) == 1.) color = 1. - color;
fragColor = vec4(color, color, color, 1.);
}
float4 PSDefault(VertFragData vtx) : TARGET {
float4 col = float4(1., 1., 1., 1.);
mainImage(col, vtx.uv * ViewSize.xy);
return col;
}
technique Draw
{
pass
{
vertex_shader = VSDefault(vtx);
pixel_shader = PSDefault(vtx);
}
}