L'électron rare
131f6ed5a8
Copy scene.metal from archive, add SceneRenderer.swift (Bundle.main), stride-guard test (144 B). Xcode compiles .metal in Resources phase even with buildPhase:resources, so use a postBuildScript with UNLOCALIZED_RESOURCES_FOLDER_PATH to copy the source as plain text.
614 lines
22 KiB
Metal
614 lines
22 KiB
Metal
// scene.metal — fond reactif aux flux data_feeds + skeleton overlay.
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//
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// 9 modes visuels style demoscene 2023+ (raymarching SDF, fractales,
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// parallax, palette IQ). Reactivite open-data via SceneUniforms.
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// 0 storm fbm tissu palette Kp/Bz + lightning flash
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// 1 tunnel raymarched tube avec anneaux translucents (wind, RMS)
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// 2 plasma volumetric noise palette IQ (Kp, social_rate)
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// 3 kaleido fractal KIFS 6-fold rotation 3D (flare, time)
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// 4 voronoi cellular 3D crystal sphere (lightning, RMS)
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// 5 metaballs raymarched SDF metaballs colored shading (RMS, beat)
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// 6 starfield galaxy spiral parallax + god rays (wind, kp)
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// 7 bars 3D pillars en perspective avec depth fog (RMS+social)
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// 8 hands3d raymarching mandelbox-like + hands camera control
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#include <metal_stdlib>
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using namespace metal;
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struct SceneUniforms {
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float time;
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float rms;
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float kp_norm;
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float netz_dev;
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float lightning_flash;
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float flare;
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float wind_norm;
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float bz_norm;
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float social_rate;
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float pose_alive;
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float pose_count;
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float width;
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float height;
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float viz_mode;
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float hand_l_x;
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float hand_l_y;
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float hand_r_x;
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float hand_r_y;
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// ---- 2026-05-14 face / hand / body3d derivatives ----
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// mouth_open : |lip51.y - lip57.y| normalized 0..~0.15
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// eye_open_l/r : H/W ratio of eye bbox, ~0.15 (closed) .. 0.45 (open)
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// head_tilt : atan2(eye_R.y-eye_L.y, eye_R.x-eye_L.x) rad
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// head_yaw : nose.y - eyes_mid.y (proxy pitch, normalized)
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// finger_pinch_l/r: simd_distance(thumb_tip[4], index_tip[8]) px-norm
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// body_x/y/z : pelvis world meters (MediaPipe hip-relative)
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// body_height : |hip.y - head.y| world meters
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// arm_spread : |wristL.x - wristR.x| world meters
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// pose_velocity : EMA(|pelvis(t) - pelvis(t-1)|), alpha=0.3
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float mouth_open;
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float eye_open_l;
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float eye_open_r;
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float head_tilt;
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float head_yaw;
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float finger_pinch_l;
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float finger_pinch_r;
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float body_x;
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float body_y;
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float body_z;
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float body_height;
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float arm_spread;
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float pose_velocity;
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float _pad0;
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float _pad1;
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float _pad2;
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float _pad3;
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float _pad4;
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};
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struct VsOut {
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float4 position [[position]];
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float2 uv;
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};
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vertex VsOut bg_vertex(uint vid [[vertex_id]]) {
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float2 p = float2((vid << 1) & 2, vid & 2);
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VsOut o;
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o.position = float4(p * 2.0 - 1.0, 0.0, 1.0);
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o.uv = p;
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return o;
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}
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// ===== Helpers ====================================================
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float hash21(float2 p) {
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p = fract(p * float2(123.34, 456.21));
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p += dot(p, p + 45.32);
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return fract(p.x * p.y);
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}
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float hash31(float3 p) {
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p = fract(p * 0.1031);
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p += dot(p, p.yzx + 33.33);
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return fract((p.x + p.y) * p.z);
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}
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float noise2(float2 p) {
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float2 i = floor(p);
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float2 f = fract(p);
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float a = hash21(i);
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float b = hash21(i + float2(1, 0));
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float c = hash21(i + float2(0, 1));
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float d = hash21(i + float2(1, 1));
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float2 u = f * f * (3.0 - 2.0 * f);
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return mix(mix(a, b, u.x), mix(c, d, u.x), u.y);
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}
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float fbm(float2 p) {
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float v = 0.0, a = 0.5;
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for (int i = 0; i < 5; ++i) { v += a * noise2(p); p *= 2.13; a *= 0.5; }
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return v;
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}
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// Palette cosinusoidale IQ : 3 tons doux
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float3 palIQ(float t, float3 a, float3 b, float3 c, float3 d) {
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return a + b * cos(6.28318 * (c * t + d));
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}
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// Rotations
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float3 rotY(float3 p, float a) {
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float c = cos(a), s = sin(a);
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return float3(c * p.x + s * p.z, p.y, -s * p.x + c * p.z);
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}
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float3 rotX(float3 p, float a) {
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float c = cos(a), s = sin(a);
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return float3(p.x, c * p.y - s * p.z, s * p.y + c * p.z);
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}
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float3 rotZ(float3 p, float a) {
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float c = cos(a), s = sin(a);
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return float3(c * p.x - s * p.y, s * p.x + c * p.y, p.z);
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}
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// SDF primitives
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float sdSphere(float3 p, float r) { return length(p) - r; }
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float sdBox(float3 p, float3 b) {
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float3 q = abs(p) - b;
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return length(max(q, 0.0)) + min(max(q.x, max(q.y, q.z)), 0.0);
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}
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float sdTorus(float3 p, float2 t) {
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float2 q = float2(length(p.xz) - t.x, p.y);
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return length(q) - t.y;
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}
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float smin(float a, float b, float k) {
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float h = clamp(0.5 + 0.5 * (b - a) / k, 0.0, 1.0);
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return mix(b, a, h) - k * h * (1.0 - h);
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}
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float vignette(float2 p) {
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return 1.0 - smoothstep(0.6, 1.5, length(p));
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}
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// ===== Modes =======================================================
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// ---- 0 storm : tissu fbm reactif + bloom-fake ----
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// Pose mods : pose_velocity boost intensity, head_tilt shifts hue.
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float3 mode_storm(float2 p, constant SceneUniforms& U) {
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float storm = saturate(U.kp_norm * 1.0 + max(-U.bz_norm, 0.0) * 0.5
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+ U.pose_velocity * 2.0);
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float speed = 0.08 + U.wind_norm * 1.5 + U.pose_velocity * 3.0;
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float zoom = 1.8 - U.rms * 1.2;
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float n = fbm(p * zoom + float2(U.time * speed, U.time * speed * 0.7));
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n = pow(n, 1.2 - U.rms * 0.5);
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float netz = sin(U.time * 50.0 + U.netz_dev * 800.0) * 0.06;
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float hue_shift = U.head_tilt * 0.25;
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float3 base = palIQ(n + storm * 0.5 + hue_shift,
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float3(0.10, 0.05, 0.20),
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float3(0.40, 0.30, 0.55),
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float3(1.0, 1.0, 1.0),
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float3(0.0, 0.33, 0.67));
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float bloom = smoothstep(0.7, 1.0, n);
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float velocity_boost = 1.0 + U.pose_velocity * 1.5;
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return (base * (n * 1.4 + 0.3) + netz + U.rms * 1.2
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+ bloom * 0.7) * velocity_boost
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+ float3(1.0, 0.55, 0.1) * U.flare * 1.4
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+ float3(U.lightning_flash * 0.7);
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}
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// ---- 1 tunnel : raymarched cylindrical tube avec anneaux ----
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float3 mode_tunnel(float2 p, constant SceneUniforms& U) {
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// Pseudo-3D tunnel: r/theta + scrolling z
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float r = length(p);
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float a = atan2(p.y, p.x);
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float z = U.time * (1.5 + U.wind_norm * 8.0 + U.rms * 4.0);
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// Repeat depth
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float d = 1.0 / max(r, 0.04) + z;
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// anneaux + spirale
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float ring = sin(d * 4.0) * 0.5 + 0.5;
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float spiral = sin(a * (8.0 + U.kp_norm * 6.0) + d * 0.6);
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float v = ring * (0.4 + 0.6 * spiral);
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// Iris central
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v *= smoothstep(0.05, 0.20, r);
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float3 base = palIQ(d * 0.06 + U.time * 0.05,
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float3(0.15, 0.05, 0.35),
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float3(0.55, 0.25, 0.35),
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float3(1.0, 1.0, 0.8),
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float3(0.0, 0.10, 0.20));
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float3 col = base * v;
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// Chromatic aberration fake : sample displaced
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float chrom = U.lightning_flash * 0.15;
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col.r *= 1.0 + chrom; col.b *= 1.0 - chrom;
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return col + float3(1.0, 0.7, 0.3) * U.flare * 1.5
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+ float3(U.lightning_flash * 0.6);
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}
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// ---- 2 plasma : volumetric noise palette IQ ----
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// Pose mods : mouth_open modulates spatial frequency; head_yaw shifts hue.
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float3 mode_plasma(float2 p, constant SceneUniforms& U) {
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float t = U.time * (0.5 + U.rms * 1.5);
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float freq_boost = 1.0 + U.mouth_open * 12.0;
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// 3 octaves de sin/cos en composition
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float v = sin(p.x * 4.0 * freq_boost + t)
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+ sin(p.y * 5.0 * freq_boost - t * 1.2)
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+ sin((p.x + p.y) * 3.5 + t * 0.7)
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+ sin(length(p) * (8.0 + U.kp_norm * 4.0) - t * 1.8);
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v = v * 0.25 + 0.5;
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// Fake volumetric "depth" : repeat layers
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float layer2 = sin(p.x * 2.0 - t * 0.5) * sin(p.y * 2.5 + t * 0.7);
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v = mix(v, v * 0.5 + 0.5 * (layer2 + 1.0) * 0.5, 0.35);
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float hue_offset = U.head_yaw * 0.5;
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float3 col = palIQ(v + hue_offset,
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float3(0.5),
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float3(0.5),
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float3(1.0, 1.0, 1.0),
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float3(0.0, 0.33, 0.67));
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col *= 0.8 + U.kp_norm * 0.7 + U.social_rate * 0.5
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+ U.mouth_open * 1.0;
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return col + float3(0.6, 0.3, 1.0) * U.lightning_flash * 0.5;
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}
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// ---- 3 kaleido : KIFS fractal 6-fold avec rot 3D fake ----
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// Pose mods : arm_spread drives segment count (4..16).
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float3 mode_kaleido(float2 p, constant SceneUniforms& U) {
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float ang = U.time * 0.15 + U.flare * 2.0;
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float c = cos(ang), s = sin(ang);
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p = float2(c * p.x - s * p.y, s * p.x + c * p.y);
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float r = length(p);
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float a = atan2(p.y, p.x);
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float seg_count = clamp(ceil(4.0 + U.arm_spread * 8.0), 3.0, 16.0);
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float seg = 6.28318 / seg_count;
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a = abs(fmod(a + seg * 0.5, seg) - seg * 0.5);
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float2 q = float2(cos(a), sin(a)) * r;
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// Iteration KIFS-like
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float scale = 1.0;
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for (int i = 0; i < 4; ++i) {
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q = abs(q) - 0.35;
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if (q.y > q.x) q = q.yx;
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q *= 1.5; scale *= 1.5;
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}
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float v = length(q) / scale;
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float n = fbm(q * 3.0 + U.time * 0.2);
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float3 col = palIQ(v + n * 0.3,
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float3(0.20, 0.10, 0.30),
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float3(0.55, 0.40, 0.50),
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float3(1.0, 1.0, 0.5),
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float3(0.0, 0.25, 0.50));
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col = col * (1.0 - exp(-v * 6.0));
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return col * (0.8 + U.rms * 1.0)
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+ float3(1.0, 0.6, 0.2) * U.flare * 1.2;
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}
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// ---- 4 voronoi : 3D crystalline cellular ----
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float3 mode_voronoi(float2 p, constant SceneUniforms& U) {
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// 3D voronoi : on echantillonne dans une grille 3D animee
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float t = U.time * (0.4 + U.rms * 1.0);
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float3 P = float3(p * 3.5, t);
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float3 ip = floor(P);
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float3 fp = fract(P);
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float d1 = 10.0, d2 = 10.0;
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for (int z = -1; z <= 1; ++z)
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for (int y = -1; y <= 1; ++y)
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for (int x = -1; x <= 1; ++x) {
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float3 g = float3(float(x), float(y), float(z));
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float3 o = float3(hash31(ip + g + 13.0),
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hash31(ip + g + 71.0),
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hash31(ip + g + 47.0));
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o = 0.5 + 0.5 * sin(t + 6.28 * o);
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float3 dv = g + o - fp;
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float d = dot(dv, dv);
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if (d < d1) { d2 = d1; d1 = d; }
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else if (d < d2) { d2 = d; }
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}
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d1 = sqrt(d1); d2 = sqrt(d2);
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float edge = smoothstep(0.0, 0.04, d2 - d1); // walls between cells
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float face = smoothstep(0.0, 0.6, d1);
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float3 base = palIQ(d1,
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float3(0.05, 0.08, 0.20),
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float3(0.45, 0.35, 0.55),
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float3(1.0, 1.0, 0.6),
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float3(0.2, 0.3, 0.0));
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return base * (1.0 - face) + float3(1.0) * (1.0 - edge) * 0.5
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+ U.lightning_flash * 0.8;
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}
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// ---- 5 metaballs : raymarched SDF ----
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float metaballs_dist(float3 p, constant SceneUniforms& U) {
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float t = U.time * 0.7;
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float d = 100.0;
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for (int k = 0; k < 5; ++k) {
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float fk = float(k);
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float3 c = float3(
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sin(t * (0.6 + 0.13 * fk) + fk * 1.7) * 1.2,
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cos(t * (0.5 + 0.11 * fk) + fk * 2.1) * 1.0,
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sin(t * (0.4 + 0.09 * fk) + fk * 3.0) * 0.8
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);
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float radius = 0.45 + 0.15 * U.rms + 0.05 * sin(t + fk);
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d = smin(d, sdSphere(p - c, radius), 0.45);
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}
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return d;
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}
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float3 mode_metaballs(float2 p, constant SceneUniforms& U) {
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float3 ro = float3(0, 0, -3.5);
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float3 rd = normalize(float3(p, 1.5));
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float t = 0.0;
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float glow = 0.0;
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int i;
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for (i = 0; i < 64; ++i) {
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float3 pos = ro + rd * t;
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float d = metaballs_dist(pos, U);
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if (d < 0.01) break;
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glow += 0.02 / (1.0 + d * d * 4.0);
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t += d * 0.9;
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if (t > 8.0) break;
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}
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float3 col = float3(0);
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if (t < 8.0) {
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float3 pos = ro + rd * t;
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// normal via gradient
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float2 e = float2(0.001, 0);
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float3 n = normalize(float3(
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metaballs_dist(pos + e.xyy, U) - metaballs_dist(pos - e.xyy, U),
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metaballs_dist(pos + e.yxy, U) - metaballs_dist(pos - e.yxy, U),
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metaballs_dist(pos + e.yyx, U) - metaballs_dist(pos - e.yyx, U)));
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float3 lightDir = normalize(float3(0.6, 0.8, -0.5));
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float lambert = max(0.0, dot(n, lightDir));
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float fres = pow(1.0 - max(0.0, dot(n, -rd)), 2.0);
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col = palIQ(pos.x * 0.3 + pos.y * 0.2 + U.time * 0.1,
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float3(0.2, 0.0, 0.3),
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float3(0.5, 0.5, 0.4),
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float3(1.0),
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float3(0.0, 0.33, 0.67)) * lambert;
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col += float3(0.3, 0.7, 1.0) * fres * (0.7 + U.kp_norm);
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}
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col += float3(0.2, 0.6, 1.0) * glow * 1.5;
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return col + U.lightning_flash * 0.6;
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}
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// ---- 6 starfield : galaxy spiral + parallax ----
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// Pose mods : finger_pinch L+R drives star density per layer.
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float3 mode_starfield(float2 p, constant SceneUniforms& U) {
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float warp = U.time * (1.5 + U.wind_norm * 6.0);
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float pinch = saturate((U.finger_pinch_l + U.finger_pinch_r) * 2.0);
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int stars_per_layer = 30 + int(pinch * 70.0); // 30..100
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// 3 layers of stars at different speeds
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float3 col = float3(0);
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for (int L = 0; L < 3; ++L) {
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float speed = (1.0 + float(L) * 0.5);
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float scale = 6.0 + float(L) * 4.0;
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for (int k = 0; k < 100; ++k) {
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if (k >= stars_per_layer) break;
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float fk = float(k + L * 50);
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float r0 = hash21(float2(fk, 7.0 + float(L)));
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float a0 = hash21(float2(fk, 17.0 + float(L))) * 6.28;
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// Spirale galactique
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float angle = a0 + r0 * 4.0;
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float dist = fract(r0 + warp * 0.04 * speed) * 1.6;
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float2 q = float2(cos(angle + dist * 1.5),
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sin(angle + dist * 1.5)) * dist;
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float d = length(p - q);
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float bright = smoothstep(0.012 / speed, 0.0, d);
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col += float3(0.5 + r0 * 0.5, 0.7 - r0 * 0.3, 1.0) * bright
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* (1.4 - dist) * (1.0 / speed);
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}
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}
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// God rays subtils depuis le centre
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float ang = atan2(p.y, p.x);
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float rays = 0.5 + 0.5 * sin(ang * 8.0 + U.time);
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col += float3(0.3, 0.4, 0.7) * rays * (1.0 - length(p)) * 0.15
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* (0.5 + U.kp_norm);
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return col + U.flare * float3(1.0, 0.5, 0.2) * 0.4;
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}
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// ---- 7 bars : 3D pillars en perspective ----
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float3 mode_bars(float2 p, constant SceneUniforms& U) {
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// Pseudo-3D : barres "horizontales" qui s'eloignent
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int nbars = 24;
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float t = U.time * 0.4;
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float3 col = float3(0);
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// Sky gradient
|
|
float3 sky = mix(float3(0.05, 0.0, 0.15), float3(0.25, 0.1, 0.35),
|
|
p.y * 0.5 + 0.5);
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|
col = sky;
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|
for (int i = 0; i < nbars; ++i) {
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|
float fi = float(i) / float(nbars);
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|
// Position en profondeur (z = 0 proche, 1 loin)
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|
float z = fract(fi + t * (0.15 + U.rms * 0.3));
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|
float perspective = 1.0 / (z + 0.1);
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|
float y_base = -0.6 + z * 1.2; // ligne d'horizon
|
|
// Hauteur barre depend du bin "i" via hash + RMS
|
|
float h0 = hash21(float2(float(i), 0.0));
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|
float h = sin(t * (0.5 + h0 * 4.0) + float(i)) * 0.5 + 0.5;
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|
// body_height (0..~1.8 m) + eye_open avg modulate bar height
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|
float eyes = (U.eye_open_l + U.eye_open_r) * 0.5;
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|
h = h * (0.3 + U.rms * 1.5 + U.social_rate * 0.4
|
|
+ U.body_height * 0.6 + eyes * 0.8);
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|
h = clamp(h, 0.02, 0.95);
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|
float bar_top = y_base + h * perspective * 0.3;
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|
// Largeur = 1 / nbars perspective
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|
float bx = (fi - 0.5) * perspective * 1.5;
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|
float bw = 0.5 / float(nbars) * perspective;
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|
if (abs(p.x - bx) < bw &&
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|
p.y > y_base && p.y < bar_top) {
|
|
float3 c = palIQ(fi,
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|
float3(0.5), float3(0.5),
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|
float3(1.0, 1.0, 0.5),
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|
float3(0.0, 0.33, 0.67));
|
|
// Fog selon z
|
|
c *= 1.0 - z * 0.6;
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|
col = mix(col, c, 1.0 - z * 0.3);
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|
}
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|
}
|
|
// Grille du sol scanline
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|
float floor_y = -0.6;
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|
if (p.y < floor_y) {
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|
float depth = (floor_y - p.y) * 4.0;
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|
float grid = step(0.95, fract(p.x * 8.0 / max(depth, 0.1)));
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|
grid += step(0.95, fract(depth * 4.0 + t));
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|
col += float3(0.2, 0.3, 0.6) * grid * 0.4;
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|
}
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|
return col + U.flare * float3(1.0, 0.5, 0.2) * 0.3;
|
|
}
|
|
|
|
// ---- 8 hands3d : voyage 3D pilote par les mains ----
|
|
float map_hands(float3 p, constant SceneUniforms& U) {
|
|
float3 q = fmod(p + 2.0, 4.0) - 2.0;
|
|
float d = length(q) - 0.6;
|
|
float pulse = 0.8 + U.rms * 0.6;
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|
d = min(d, length(p) - pulse);
|
|
d += sin(p.x * 2.0 + U.time) * 0.15 * U.kp_norm;
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|
return d;
|
|
}
|
|
float3 mode_hands3d(float2 p, constant SceneUniforms& U) {
|
|
float hl_active = (abs(U.hand_l_x) + abs(U.hand_l_y)) > 0.01 ? 1.0 : 0.0;
|
|
float hr_active = (abs(U.hand_r_x) + abs(U.hand_r_y)) > 0.01 ? 1.0 : 0.0;
|
|
float3 cam_pos = float3(
|
|
U.hand_l_x * 5.0,
|
|
U.hand_l_y * 3.0,
|
|
-U.time * (1.5 + U.hand_l_y * 4.0 * hl_active)
|
|
);
|
|
float yaw = U.hand_r_x * 1.2 * hr_active;
|
|
float pitch = -U.hand_r_y * 0.8 * hr_active;
|
|
float3 rd = normalize(float3(p.x, p.y, 1.5));
|
|
rd = rotX(rd, pitch);
|
|
rd = rotY(rd, yaw);
|
|
float t = 0.0, glow = 0.0;
|
|
for (int i = 0; i < 64; ++i) {
|
|
float3 pos = cam_pos + rd * t;
|
|
float d = map_hands(pos, U);
|
|
if (d < 0.005) break;
|
|
glow += 0.02 / (1.0 + d * d * 8.0);
|
|
t += d * 0.85;
|
|
if (t > 30.0) break;
|
|
}
|
|
float3 col = float3(0);
|
|
if (t < 30.0) {
|
|
float3 pos = cam_pos + rd * t;
|
|
float fog = 1.0 - saturate(t / 30.0);
|
|
col = float3(
|
|
0.5 + 0.5 * sin(pos.x * 0.4 + U.time),
|
|
0.5 + 0.5 * sin(pos.y * 0.5 + U.time * 1.3),
|
|
0.5 + 0.5 * sin(pos.z * 0.3 + U.time * 0.7)
|
|
) * fog;
|
|
}
|
|
col += float3(0.2, 0.6, 1.0) * glow * 1.5;
|
|
col += float3(1.0, 0.5, 0.0) * U.flare * 0.8;
|
|
return col;
|
|
}
|
|
|
|
// ---- 9 openpos : fond minimal radial pour faire ressortir le squelette ----
|
|
// Le rendu des joints + bones se fait par le skel_pipeline rendu PAR-DESSUS
|
|
// (cf renderer.py). On laisse juste un degrade radial sombre pour le contraste.
|
|
float3 mode_openpos(float2 p, constant SceneUniforms& U) {
|
|
float r = length(p);
|
|
// Centre legerement plus clair, bords sombres. Touche de couleur
|
|
// chaude au centre selon rms pour reagir a la musique.
|
|
float3 inner = float3(0.05, 0.05, 0.10) + float3(0.30, 0.12, 0.18) * U.rms;
|
|
float3 outer = float3(0.01, 0.01, 0.02);
|
|
float3 col = mix(inner, outer, smoothstep(0.0, 1.4, r));
|
|
// Grille de points discrete pour donner une ref de profondeur
|
|
float2 g = fmod(p * 12.0, 2.0) - 1.0;
|
|
float dot_grid = exp(-dot(g, g) * 6.0) * 0.04;
|
|
col += float3(dot_grid);
|
|
// Pulsation legere sur le kick / drop
|
|
col *= 1.0 + U.rms * 0.4;
|
|
return col;
|
|
}
|
|
|
|
// ===== Fragment dispatcher =========================================
|
|
|
|
fragment float4 bg_fragment(VsOut in [[stage_in]],
|
|
constant SceneUniforms& U [[buffer(0)]]) {
|
|
float2 uv = in.uv;
|
|
float2 p = uv * 2.0 - 1.0;
|
|
p.x *= U.width / U.height;
|
|
|
|
int mode = int(U.viz_mode + 0.5);
|
|
float3 color;
|
|
if (mode == 1) color = mode_tunnel(p, U);
|
|
else if (mode == 2) color = mode_plasma(p, U);
|
|
else if (mode == 3) color = mode_kaleido(p, U);
|
|
else if (mode == 4) color = mode_voronoi(p, U);
|
|
else if (mode == 5) color = mode_metaballs(p, U);
|
|
else if (mode == 6) color = mode_starfield(p, U);
|
|
else if (mode == 7) color = mode_bars(p, U);
|
|
else if (mode == 8) color = mode_hands3d(p, U);
|
|
else if (mode == 9) color = mode_openpos(p, U);
|
|
else color = mode_storm(p, U);
|
|
|
|
// Flash global + vignette
|
|
color += float3(U.lightning_flash * 1.2);
|
|
color *= vignette(p);
|
|
|
|
// Tone mapping doux (Reinhard)
|
|
color = color / (1.0 + color);
|
|
// Gamma
|
|
color = pow(color, float3(0.85));
|
|
|
|
// Alpha pour transparence quand pose active (webcam visible dessous)
|
|
// Overlay vidéo : translucide même sans pose (la webcam doit rester
|
|
// visible en fond). Pose active = encore plus translucide.
|
|
float alpha = mix(0.55, 0.25, U.pose_alive);
|
|
alpha = max(alpha, U.lightning_flash * 0.8);
|
|
alpha = max(alpha, U.flare * 0.6);
|
|
return float4(color, alpha);
|
|
}
|
|
|
|
// ===== Skeleton overlay ============================================
|
|
|
|
struct SkelIn {
|
|
float3 pos [[attribute(0)]]; // x,y dans NDC, z profondeur (~ -0.5..+0.5)
|
|
float conf [[attribute(1)]];
|
|
float pid [[attribute(2)]]; // person_id (0..9)
|
|
};
|
|
struct SkelOut {
|
|
float4 position [[position]];
|
|
float conf;
|
|
float pid;
|
|
float depth;
|
|
};
|
|
|
|
// Projection perspective douce : eloigne avec z, garde NDC en x,y
|
|
vertex SkelOut skel_vertex(SkelIn in [[stage_in]],
|
|
constant SceneUniforms& U [[buffer(1)]]) {
|
|
SkelOut o;
|
|
float z = clamp(in.pos.z, -1.0, 1.0);
|
|
// Perspective : plus z augmente, plus le point est loin → scale < 1
|
|
// RMS pulse fait respirer la profondeur
|
|
float pulse = 1.0 + U.rms * 0.25;
|
|
float persp = 1.0 / (1.0 + z * 0.8);
|
|
float2 xy = in.pos.xy * persp * pulse;
|
|
o.position = float4(xy, 0.0, 1.0);
|
|
o.conf = in.conf;
|
|
o.pid = in.pid;
|
|
o.depth = z;
|
|
return o;
|
|
}
|
|
|
|
// Palette 6 couleurs par personne (turquoise, magenta, jaune, ambre, lilas, vert)
|
|
constant float3 PERSON_COLORS[6] = {
|
|
float3(0.0, 1.0, 0.85), // 0 turquoise
|
|
float3(1.0, 0.3, 0.7), // 1 magenta
|
|
float3(1.0, 0.9, 0.2), // 2 jaune
|
|
float3(1.0, 0.55, 0.1), // 3 ambre
|
|
float3(0.7, 0.5, 1.0), // 4 lilas
|
|
float3(0.4, 1.0, 0.3), // 5+ vert (mains)
|
|
};
|
|
|
|
// ===== Mesh overlay (triangles face/hand/body) =====================
|
|
// Reuse meme layout que skel : pos.xyz + conf + pid.
|
|
|
|
vertex SkelOut mesh_vertex(SkelIn in [[stage_in]],
|
|
constant SceneUniforms& U [[buffer(1)]]) {
|
|
SkelOut o;
|
|
float z = clamp(in.pos.z, -1.0, 1.0);
|
|
float pulse = 1.0 + U.rms * 0.25;
|
|
float persp = 1.0 / (1.0 + z * 0.8);
|
|
float2 xy = in.pos.xy * persp * pulse;
|
|
o.position = float4(xy, 0.0, 1.0);
|
|
o.conf = in.conf;
|
|
o.pid = in.pid;
|
|
o.depth = z;
|
|
return o;
|
|
}
|
|
|
|
fragment float4 mesh_fragment(SkelOut in [[stage_in]]) {
|
|
int pid = int(in.pid + 0.5);
|
|
pid = ((pid % 6) + 6) % 6;
|
|
float3 col = PERSON_COLORS[pid];
|
|
float c = saturate(in.conf);
|
|
// Saturation boost : couleurs vives quand pose detectee
|
|
col = mix(col, col * 1.6, c);
|
|
// Fog par profondeur (proche = plus lumineux)
|
|
float depth_fog = 1.0 - clamp(in.depth + 0.5, 0.0, 1.0) * 0.5;
|
|
col *= depth_fog;
|
|
// Alpha TRES VISIBLE quand confiance haute : 0.85 sur skin, 0.3 fade
|
|
return float4(col, mix(0.3, 0.85, c));
|
|
}
|
|
|
|
fragment float4 skel_fragment(SkelOut in [[stage_in]]) {
|
|
// Skeleton ULTRA visible quand pose detectee : couleur vive + opaque
|
|
int pid = int(in.pid + 0.5);
|
|
pid = ((pid % 6) + 6) % 6; // modulo positif
|
|
float3 col = PERSON_COLORS[pid] * 1.4; // saturation boost
|
|
float c = saturate(in.conf);
|
|
// Depth fog : eclaircit ce qui est proche, eteint ce qui est loin
|
|
float depth_fog = 1.0 - clamp(in.depth + 0.5, 0.0, 1.0) * 0.6;
|
|
col *= depth_fog * (0.5 + 0.5 * c);
|
|
// Alpha plein-opaque quand confiance haute (= squelette ultra net)
|
|
return float4(col, mix(0.5, 1.0, c));
|
|
}
|