Ripple Shader

Steven asked me to write a ripple effect shader for his upcoming shmup title for android and iOS.

Steven hat mich gebeten, einen Shader mit Schmelzeffekt für sein neues Shoot 'em up-Spiel für Android und iOS zu schreiben.

Steven mi ha chiesto di scrivere uno shader con effetto a catena per il suo prossimo titolo shmup per Android e iOS.

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sampler2D background_texture : register(s1)  = sampler_state{
AddressU = Clamp;
AddressV = Clamp;
};
float freq;
float speed;
float amplitude ;
float centerx;
float centery;
float effect;
struct PS_INPUT
{
float4 p : POSITION;
float2 v_texcoord0 : TEXCOORD0;
};
struct PS_OUTPUT
{
float4 c     : COLOR0;
};
PS_OUTPUT ps_main(PS_INPUT input)
{
PS_OUTPUT output;   
float2 center=float2(centerx,centery);
float2 toUV = input.v_texcoord0 - center;
float distanceFromCenter = length(toUV);
float2 normToUV = toUV / distanceFromCenter;
float wave = cos(freq * distanceFromCenter - speed * effect);
float offset1 = effect * wave * amplitude;
float offset2 = (1.0 - effect) * wave * amplitude;
float2 newUV1 = center + normToUV * (distanceFromCenter + offset1);
float2 newUV2 = center + normToUV * (distanceFromCenter + offset2);
float4 c1 = tex2D(background_texture, newUV1); 
float4 c2 = tex2D(background_texture, newUV2);
output.c=lerp(c1, c2, effect);
return output;
}
technique tech_main
{
pass P0
{
VertexShader = NULL;
PixelShader  = compile ps_2_a ps_main();
}  
}

GitHub Project

admin2026-01-28T21:23:47+00:00January 28, 2026Januar 28, 2026Gennaio 28, 2026|Categories:Kategorien:Categorie: Code, Megadroid 90|Tags: GLSL, HLSL|

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Ripple Shader

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