67 lines
2.0 KiB
HLSL
67 lines
2.0 KiB
HLSL
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// Plasma Generator
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// HMS MediaEngine – Generator (kein Eingangstextur-Bezug, cbuffer identisch §14.4)
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// D3D11-Pixelshader (PS_5_0). Semantik identisch zu GL/GLES (§12.6, §15.1).
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Texture2D u_input_texture : register(t0);
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SamplerState u_sampler : register(s0);
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cbuffer hms_params : register(b0)
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{
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float4 u_resolution; // xy = Auflösung in Pixeln
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float u_time_seconds;
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float u_delta_seconds;
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float u_frame_index;
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float u_layer_opacity;
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float u_audio_rms;
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float u_audio_peak;
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float u_audio_bass;
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float u_audio_mid;
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float u_audio_treble;
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float u_audio_beat;
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float4 param_color_a;
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float4 param_color_b;
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float param_scale;
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float param_stretch_x;
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float param_stretch_y;
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float param_distance;
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float param_phase;
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float param_speed;
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float param_seed;
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float u_quality_samples; // AQ-Variante (Backend-Bindung)
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float _pad0; // 16-Byte-Alignment
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float _pad1; // 16-Byte-Alignment
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};
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float hash21(float2 p)
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{
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p = frac(p * float2(123.34, 456.21));
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p += dot(p, p + 45.32);
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return frac(p.x * p.y);
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}
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float4 mainPS(float4 pos : SV_POSITION, float2 uv : TEXCOORD0) : SV_Target
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{
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float2 p = (uv - 0.5) * param_scale;
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p.x *= param_stretch_x;
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p.y *= param_stretch_y;
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float t = u_time_seconds * param_speed + param_phase;
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float terms = clamp(u_quality_samples, 1.0, 8.0);
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float v = 0.0;
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[loop]
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for (int i = 0; i < 8; i++)
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{
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if (float(i) >= terms) { break; }
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float fi = float(i + 1);
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v += sin(p.x * fi + t * fi * 0.5 + param_seed)
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* sin(p.y * fi * 1.3 - t * fi * 0.3 + param_seed * 2.0);
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v += sin(length(p) * fi * 0.7 + t * 0.8 + param_seed);
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}
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v /= terms;
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v = v * 0.5 + 0.5;
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float d = length(p) * param_distance;
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v += 0.5 + 0.5 * sin(d * 3.0 - t * 1.5 + param_seed);
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v = saturate(v);
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float3 col = lerp(param_color_a.rgb, param_color_b.rgb, v);
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return float4(col * u_layer_opacity, u_layer_opacity);
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}
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