feat(render3d): an aspen quakes, and a tree is no longer bent like a bow

layer_flutter(l, v) gives a scatter layer a per-leaf tremble. The vertex stage offsets
each leaf by a phase taken from its own place on the card, so neighbouring leaves are
never in step, and writes the result out as a varying the fragment stage uses to flash
the leaf's pale underside as it turns - which is the part that reads, since a still
frame of a tremble is a still frame of nothing. One uniform, one varying, no extra pass.

And the sway itself was measured in METRES: hgt * hgt * 0.35 is right for a 40 cm
flower and puts ten metres of sideways into a 14 m trunk, so every tall tree in the
valley stood bent over like a fishing rod. It is a fraction of the model's own height
now - the tip moves a few per cent of the tree whatever the tree is, and the base does
not move at all.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

changes/an-aspen-quakes.md

@@ -0,0 +1,15 @@
+bump: minor
+type: feat
+An aspen leaf hangs on a flattened stalk and turns in air a spruce never feels, and the
+kit had no way to say so. `layer_flutter(l, v)` gives a scatter layer a per-leaf tremble:
+the vertex stage offsets each leaf by a phase taken from its own place on the card, so
+neighbouring leaves are never in step, and writes the result out as a varying the
+fragment stage uses to flash the leaf's pale underside as it turns. The flash is the part
+that reads - a still frame of a tremble is a still frame of nothing. One uniform, one
+varying, no extra pass, and every other layer leaves it at zero.
+
+Also fixes the sway itself, which was measured in METRES: `hgt * hgt * 0.35` is right for
+a 40 cm flower and puts ten metres of sideways into a 14 m trunk, so every tall tree in
+the valley stood bent over like a fishing rod. It is a fraction of the model's own height
+now, so the tip moves a few per cent of the tree whatever the tree is and the base does
+not move at all.

packages/ludic.render3d/scatter.ludic

@@ -19,6 +19,7 @@ property Layer {
   imp:      Impostor,
   foliage:  bool = false,
   wind:     int = 0,        # float bits
+  flutter:  int = 0,        # float bits; per-leaf tremble (aspen), 0 = none
   tint:     words,
   inst:     words,          # INST_FLOATS per instance
   count:    int = 0,
@@ -128,6 +129,11 @@ function model_cross_card() -> Model {
 }
 
 # A card layer: crossed cards carrying a single-tile atlas baked from `scan`.
+# An aspen leaf hangs on a flattened stalk and turns in air nothing else feels. Give the
+# layer a flutter and its leaves tremble and flash their pale undersides; everything else
+# leaves it at zero. It is per layer rather than per instance because a species quakes or
+# it does not.
+function layer_flutter(l: Layer, v: int) -> void { l.flutter = v }
 function layer_cards(scan: Model, cap: int, wind: int, cull: int) -> Layer {
   let l = layer_new(model_cross_card(), cap, true, wind, F_ZERO, cull)
   l.card = true
@@ -473,6 +479,7 @@ function impostor_bake(model: Model, tiles: int, tw: int, th: int) -> Impostor {
     u_mat4(gpu_uniform(bake, "u_view"), view)
     u_mat4(gpu_uniform(bake, "u_proj"), proj)
     u_f(gpu_uniform(bake, "u_wind"), F_ZERO)
+    u_f(gpu_uniform(bake, "u_flutter"), F_ZERO)
     gpu_viewport(t * tw, 0, tw, th)
     for i in 0 .. len(model.prims) {
       let pr = model.prims[i]
@@ -1032,6 +1039,7 @@ function layer_draw_model(l: Layer, model: Model, vb: int, cnt: int, card: bool,
   if l.grounded { terrain_bind_height(p) }
   u_f(gpu_uniform(p, "u_time"), r3d_time)
   u_f(gpu_uniform(p, "u_wind"), l.wind)
+  u_f(gpu_uniform(p, "u_flutter"), l.flutter)
   var mh = F_ZERO
   if not card and l.foliage { mh = model.height }
   u_f(gpu_uniform(p, "u_model_h"), mh)
@@ -1154,6 +1162,7 @@ function layer_draw_depth(l: Layer, model: Model, vb: int, cnt: int) -> void {
   if l.grounded { terrain_bind_height(p) }
   u_f(gpu_uniform(p, "u_time"), r3d_time)
   u_f(gpu_uniform(p, "u_wind"), l.wind)
+  u_f(gpu_uniform(p, "u_flutter"), l.flutter)
   u_f(gpu_uniform(p, "u_model_h"), model.height)
   u_mat4(gpu_uniform(p, "u_view"), cam_view)
   u_mat4(gpu_uniform(p, "u_proj"), cam_proj)
@@ -1298,6 +1307,7 @@ function carpet_bake(layers: []Layer, count: int, tile: int, res: int) -> int {
   u_mat4(gpu_uniform(bake, "u_view"), view)
   u_mat4(gpu_uniform(bake, "u_proj"), proj)
   u_f(gpu_uniform(bake, "u_wind"), F_ZERO)
+  u_f(gpu_uniform(bake, "u_flutter"), F_ZERO)
   u_f(gpu_uniform(bake, "u_time"), F_ZERO)
   for li in 0 .. len(layers) {
     let l = layers[li]

packages/ludic.render3d/shaders/grass.mesh

@@ -38,6 +38,7 @@ out vec2 v_uv[];
 out float v_seed[];
 out vec2 v_rot[];
 out float v_hull[];
+out float v_quake[];   // grass does not quake; written so model.frag can read it
 
 const float CELL = 16.0;
 float hash1(vec2 p) { return fract(sin(dot(p, vec2(127.1, 311.7))) * 43758.5453123); }
@@ -153,6 +154,7 @@ void main() {
         v_seed[o] = seed;
         v_rot[o] = vec2(s, c_);
         v_hull[o] = hull;
+        v_quake[o] = 0.0;
       }
     }
     for (int q = 0; q < ROWS - 1; q++) {

packages/ludic.render3d/shaders/grass.vert

@@ -41,6 +41,7 @@ out vec2 v_uv;
 out float v_seed;
 out vec2 v_rot;
 out float v_hull;
+out float v_quake;   // only aspens quake; written so model.frag can read it
 
 const float CELL = 16.0;
 float hash1(vec2 p) { return fract(sin(dot(p, vec2(127.1, 311.7))) * 43758.5453123); }
@@ -67,7 +68,7 @@ float heightSmooth(sampler2D tex, vec2 uv) {
   return (texture(tex, vec2(o0.x, o0.y)).r * s0.x + texture(tex, vec2(o1.x, o0.y)).r * s1.x) * s0.y
        + (texture(tex, vec2(o0.x, o1.y)).r * s0.x + texture(tex, vec2(o1.x, o1.y)).r * s1.x) * s1.y;
 }
-void cull() { gl_Position = vec4(0.0, 0.0, 2.0, 1.0); v_wpos = vec3(0.0); v_nrm = vec3(0.0, 1.0, 0.0); v_uv = vec2(0.0); v_seed = 0.0; v_rot = vec2(0.0, 1.0); v_hull = 1.0; }
+void cull() { gl_Position = vec4(0.0, 0.0, 2.0, 1.0); v_wpos = vec3(0.0); v_nrm = vec3(0.0, 1.0, 0.0); v_uv = vec2(0.0); v_seed = 0.0; v_rot = vec2(0.0, 1.0); v_hull = 1.0; v_quake = 0.0; }
 
 void main() {
 #ifdef TILES
@@ -198,6 +199,7 @@ void main() {
   v_uv = far ? vec2(a_uv.x, 0.45 + 0.2 * a_uv.y) : a_uv;
   v_seed = seed;
   v_rot = vec2(s, c_);
+  v_quake = 0.0;
   v_hull = (dist > 2.0 || far || (u_dbg & 2) != 0) ? -1.0 : 1.0;   // no back-face flip, no rounding past arm's reach
   gl_Position = u_proj * u_view * vec4(w, 1.0);
 }

packages/ludic.render3d/shaders/model.frag

@@ -4,6 +4,7 @@ in vec2 v_uv;
 in float v_seed;
 in vec2 v_rot;
 in float v_hull;
+in float v_quake;   // an aspen leaf turning its pale side up
 uniform float u_model_h;
 out vec4 o_color;
 uniform sampler2D u_diff;
@@ -147,6 +148,11 @@ void main() {
   if (u_model_h > 2.0) arm.r *= mix(0.5, 1.0, v_hull);
 #endif
   alb *= u_tint * (0.85 + 0.3 * fract(v_seed * 7.13));
+  // The quake made visible. A turning aspen leaf shows its pale, almost white underside, so
+  // the crown does not merely move - it GLITTERS, leaf by leaf, and that is what reads at a
+  // distance and in a still frame. Toward the viewer is the pale side; away is the face.
+  if (v_quake > 0.0) alb = mix(alb, alb * 0.55 + vec3(0.42, 0.45, 0.33), min(v_quake * 2.6, 0.75));
+  else if (v_quake < 0.0) alb *= 1.0 + v_quake * 0.28;   // the dark half stays gentle: a crown should shimmer, not flicker
 #if defined(FOLIAGE) && !defined(BLADE)
   // Per-plant HUE, not only per-plant brightness. The line above varies value by +-15% and
   // nothing else, so a stand of one species was one colour at fifteen different exposures -

packages/ludic.render3d/shaders/model.vert

@@ -54,8 +54,15 @@ out vec2 v_rot;
 // have been shaded since SpeedTree; without it a card crown reads as frosted.
 uniform float u_model_h;     // the model's height (m), 0 = not a crown
 out float v_hull;            // 0 at the crown's axis .. 1 at its rim
+// An aspen leaf hangs on a flattened stalk, so it twists in air a conifer does not feel at
+// all. u_flutter is per layer: 0 for everything else, and the quake is written out as a
+// varying so the fragment stage can flash the leaf's pale underside as it turns - which is
+// the part you actually SEE. A still frame of a tremble is a still frame of nothing.
+uniform float u_flutter;
+out float v_quake;
 void main() {
   float s = i_rot.x, c = i_rot.y;
+  v_quake = 0.0;
   vec3 p = a_pos * i_pos.w;
 #ifdef CARD
   p = vec3(p.x * u_card_w, p.y * u_card_h, p.z * u_card_w);
@@ -81,8 +88,28 @@ void main() {
   // read at the tree's own place in the world, so a gust crosses the grass and goes on into
   // the trees. `stiff` is 0.35 because a bole resists what a blade cannot.
   float sway = windSway(i_pos.xz, u_time, ph, 0.35) * u_wind * i_rot.w;
-  p.x += sway * hgt * hgt * 0.35;
+  // The bend is a FRACTION OF THE TREE, not a number of metres. `hgt * hgt` in metres is
-  p.z += sway * hgt * hgt * 0.15 * cos(ph * 0.7);
+  // fine for a 40 cm flower and ruinous for a 14 m aspen - it put ten metres of sideways
+  // into a trunk and bent it over like a fishing rod, which is what standing under one and
+  // looking up finally showed. Normalised, the tip moves a few per cent of the tree's own
+  // height whatever the tree is, and the base does not move at all.
+  float th = max(u_model_h * i_pos.w, 0.001);
+  float hn = (u_model_h > 2.0) ? clamp(hgt / th, 0.0, 1.0) : min(hgt, 1.0);
+  float reach = (u_model_h > 2.0) ? th * 0.22 : 0.35;
+  p.x += sway * hn * hn * reach;
+  p.z += sway * hn * hn * reach * 0.43 * cos(ph * 0.7);
+  if (u_flutter > 0.0) {
+    // per-leaf, not per-tree: the phase comes from the vertex's own place on the card, so
+    // neighbouring leaves are never in step - a crown that trembles as one block reads as
+    // the whole tree shivering.
+    float qp = u_time * 8.5 + a_pos.x * 11.3 + a_pos.z * 9.7 + a_pos.y * 4.1 + i_rot.z * 6.2831;
+    float q = sin(qp) * 0.65 + sin(qp * 1.73 + 1.1) * 0.35;
+    float amp = u_flutter * (0.40 + 0.60 * windGust(i_pos.xz, u_time)) * smoothstep(0.0, 1.2, hgt);
+    p.x += q * amp * 0.10;
+    p.y += q * amp * 0.05;
+    p.z += cos(qp * 0.9) * amp * 0.10;
+    v_quake = q * amp;
+  }
 #endif
   v_hull = 1.0;
   if (u_model_h > 2.0) {

packages/ludic.render3d/shaders/skin.vert

@@ -21,6 +21,7 @@ out vec2 v_uv;
 out float v_seed;
 out vec2 v_rot;
 out float v_hull;
+out float v_quake;   // only aspens quake; written so model.frag can read it
 void main() {
   mat4 m = u_model;
   if (u_skinned > 0.5) {
@@ -43,6 +44,7 @@ void main() {
   v_seed = 0.0701;
   v_rot = vec2(0.0, 1.0);
   v_hull = 1.0;
+  v_quake = 0.0;
 #ifdef SHADOW_PASS
   gl_Position = u_light_vp * w;
 #else

packages/ludic.render3d/shaders/spv/manifest.txt

@@ -1076,7 +1076,7 @@ T 4d4fa91b u_shadow 7
 T 4d4fa91b u_tershadow 8
 T 4d4fa91b u_ts_height 9
 P 9dce3246 model.vert bake.frag 
-B 9dce3246 vert 0 232
+B 9dce3246 vert 0 236
 U 9dce3246 vert u_view 0 mat4 1 0
 U 9dce3246 vert u_proj 64 mat4 1 0
 U 9dce3246 vert u_light_vp 128 mat4 1 0
@@ -1088,6 +1088,7 @@ U 9dce3246 vert u_ground 208 float 1 0
 U 9dce3246 vert u_ts_origin 216 vec2 1 0
 U 9dce3246 vert u_ts_half 224 float 1 0
 U 9dce3246 vert u_model_h 228 float 1 0
+U 9dce3246 vert u_flutter 232 float 1 0
 I 9dce3246 i_rot 4 vec4
 I 9dce3246 a_pos 0 vec3
 I 9dce3246 i_pos 3 vec4
@@ -1137,7 +1138,7 @@ T 9dce3246 u_shadow 7
 T 9dce3246 u_tershadow 8
 T 9dce3246 u_ts_height 9
 P 439a2253 model.vert bake.frag #define CARD;
-B 439a2253 vert 0 232
+B 439a2253 vert 0 236
 U 439a2253 vert u_view 0 mat4 1 0
 U 439a2253 vert u_proj 64 mat4 1 0
 U 439a2253 vert u_light_vp 128 mat4 1 0
@@ -1149,6 +1150,7 @@ U 439a2253 vert u_ground 208 float 1 0
 U 439a2253 vert u_ts_origin 216 vec2 1 0
 U 439a2253 vert u_ts_half 224 float 1 0
 U 439a2253 vert u_model_h 228 float 1 0
+U 439a2253 vert u_flutter 232 float 1 0
 I 439a2253 i_rot 4 vec4
 I 439a2253 a_pos 0 vec3
 I 439a2253 i_pos 3 vec4
@@ -1198,7 +1200,7 @@ T 439a2253 u_shadow 7
 T 439a2253 u_tershadow 8
 T 439a2253 u_ts_height 9
 P 86f427b0 model.vert bake.frag #define FLOWER;
-B 86f427b0 vert 0 232
+B 86f427b0 vert 0 236
 U 86f427b0 vert u_view 0 mat4 1 0
 U 86f427b0 vert u_proj 64 mat4 1 0
 U 86f427b0 vert u_light_vp 128 mat4 1 0
@@ -1210,6 +1212,7 @@ U 86f427b0 vert u_ground 208 float 1 0
 U 86f427b0 vert u_ts_origin 216 vec2 1 0
 U 86f427b0 vert u_ts_half 224 float 1 0
 U 86f427b0 vert u_model_h 228 float 1 0
+U 86f427b0 vert u_flutter 232 float 1 0
 I 86f427b0 i_rot 4 vec4
 I 86f427b0 a_pos 0 vec3
 I 86f427b0 i_pos 3 vec4
@@ -1259,7 +1262,7 @@ T 86f427b0 u_shadow 7
 T 86f427b0 u_tershadow 8
 T 86f427b0 u_ts_height 9
 P bfa15301 model.vert depth.frag #define FOLIAGE;#define WIND;#define ALPHA_TEST;
-B bfa15301 vert 0 232
+B bfa15301 vert 0 236
 U bfa15301 vert u_view 0 mat4 1 0
 U bfa15301 vert u_proj 64 mat4 1 0
 U bfa15301 vert u_light_vp 128 mat4 1 0
@@ -1271,6 +1274,7 @@ U bfa15301 vert u_ground 208 float 1 0
 U bfa15301 vert u_ts_origin 216 vec2 1 0
 U bfa15301 vert u_ts_half 224 float 1 0
 U bfa15301 vert u_model_h 228 float 1 0
+U bfa15301 vert u_flutter 232 float 1 0
 I bfa15301 i_rot 4 vec4
 I bfa15301 a_pos 0 vec3
 I bfa15301 i_pos 3 vec4
@@ -1319,7 +1323,7 @@ T bfa15301 u_shadow 6
 T bfa15301 u_tershadow 7
 T bfa15301 u_ts_height 8
 P 01089da8 model.vert model.frag 
-B 01089da8 vert 0 232
+B 01089da8 vert 0 236
 U 01089da8 vert u_view 0 mat4 1 0
 U 01089da8 vert u_proj 64 mat4 1 0
 U 01089da8 vert u_light_vp 128 mat4 1 0
@@ -1331,6 +1335,7 @@ U 01089da8 vert u_ground 208 float 1 0
 U 01089da8 vert u_ts_origin 216 vec2 1 0
 U 01089da8 vert u_ts_half 224 float 1 0
 U 01089da8 vert u_model_h 228 float 1 0
+U 01089da8 vert u_flutter 232 float 1 0
 I 01089da8 i_rot 4 vec4
 I 01089da8 a_pos 0 vec3
 I 01089da8 i_pos 3 vec4
@@ -1386,7 +1391,7 @@ T 01089da8 u_shadow 8
 T 01089da8 u_tershadow 9
 T 01089da8 u_ts_height 10
 P 254e7887 model.vert model.frag #define CARD;#define CHEAP;
-B 254e7887 vert 0 232
+B 254e7887 vert 0 236
 U 254e7887 vert u_view 0 mat4 1 0
 U 254e7887 vert u_proj 64 mat4 1 0
 U 254e7887 vert u_light_vp 128 mat4 1 0
@@ -1398,6 +1403,7 @@ U 254e7887 vert u_ground 208 float 1 0
 U 254e7887 vert u_ts_origin 216 vec2 1 0
 U 254e7887 vert u_ts_half 224 float 1 0
 U 254e7887 vert u_model_h 228 float 1 0
+U 254e7887 vert u_flutter 232 float 1 0
 I 254e7887 i_rot 4 vec4
 I 254e7887 a_pos 0 vec3
 I 254e7887 i_pos 3 vec4
@@ -1454,7 +1460,7 @@ T 254e7887 u_shadow 8
 T 254e7887 u_tershadow 9
 T 254e7887 u_ts_height 10
 P 1ce5c5d1 model.vert model.frag #define FOLIAGE;#define WIND;#define ALPHA_TEST;
-B 1ce5c5d1 vert 0 232
+B 1ce5c5d1 vert 0 236
 U 1ce5c5d1 vert u_view 0 mat4 1 0
 U 1ce5c5d1 vert u_proj 64 mat4 1 0
 U 1ce5c5d1 vert u_light_vp 128 mat4 1 0
@@ -1466,6 +1472,7 @@ U 1ce5c5d1 vert u_ground 208 float 1 0
 U 1ce5c5d1 vert u_ts_origin 216 vec2 1 0
 U 1ce5c5d1 vert u_ts_half 224 float 1 0
 U 1ce5c5d1 vert u_model_h 228 float 1 0
+U 1ce5c5d1 vert u_flutter 232 float 1 0
 I 1ce5c5d1 i_rot 4 vec4
 I 1ce5c5d1 a_pos 0 vec3
 I 1ce5c5d1 i_pos 3 vec4
@@ -1521,7 +1528,7 @@ T 1ce5c5d1 u_shadow 8
 T 1ce5c5d1 u_tershadow 9
 T 1ce5c5d1 u_ts_height 10
 P f4a2b586 model.vert model.frag #define FOLIAGE;#define WIND;#define BLADE;
-B f4a2b586 vert 0 248
+B f4a2b586 vert 0 252
 U f4a2b586 vert u_view 0 mat4 1 0
 U f4a2b586 vert u_proj 64 mat4 1 0
 U f4a2b586 vert u_light_vp 128 mat4 1 0
@@ -1535,6 +1542,7 @@ U f4a2b586 vert u_ground 224 float 1 0
 U f4a2b586 vert u_ts_origin 232 vec2 1 0
 U f4a2b586 vert u_ts_half 240 float 1 0
 U f4a2b586 vert u_model_h 244 float 1 0
+U f4a2b586 vert u_flutter 248 float 1 0
 I f4a2b586 i_rot 4 vec4
 I f4a2b586 a_pos 0 vec3
 I f4a2b586 i_pos 3 vec4
@@ -1592,7 +1600,7 @@ T f4a2b586 u_shadow 8
 T f4a2b586 u_tershadow 9
 T f4a2b586 u_ts_height 10
 P b4587cd4 model.vert model.frag #define FOLIAGE;#define WIND;#define CARD;
-B b4587cd4 vert 0 232
+B b4587cd4 vert 0 236
 U b4587cd4 vert u_view 0 mat4 1 0
 U b4587cd4 vert u_proj 64 mat4 1 0
 U b4587cd4 vert u_light_vp 128 mat4 1 0
@@ -1604,6 +1612,7 @@ U b4587cd4 vert u_ground 208 float 1 0
 U b4587cd4 vert u_ts_origin 216 vec2 1 0
 U b4587cd4 vert u_ts_half 224 float 1 0
 U b4587cd4 vert u_model_h 228 float 1 0
+U b4587cd4 vert u_flutter 232 float 1 0
 I b4587cd4 i_rot 4 vec4
 I b4587cd4 a_pos 0 vec3
 I b4587cd4 i_pos 3 vec4
@@ -1660,7 +1669,7 @@ T b4587cd4 u_shadow 8
 T b4587cd4 u_tershadow 9
 T b4587cd4 u_ts_height 10
 P 4dda406a model.vert model.frag #define FOLIAGE;#define WIND;#define EQ_PASS;
-B 4dda406a vert 0 232
+B 4dda406a vert 0 236
 U 4dda406a vert u_view 0 mat4 1 0
 U 4dda406a vert u_proj 64 mat4 1 0
 U 4dda406a vert u_light_vp 128 mat4 1 0
@@ -1672,6 +1681,7 @@ U 4dda406a vert u_ground 208 float 1 0
 U 4dda406a vert u_ts_origin 216 vec2 1 0
 U 4dda406a vert u_ts_half 224 float 1 0
 U 4dda406a vert u_model_h 228 float 1 0
+U 4dda406a vert u_flutter 232 float 1 0
 I 4dda406a i_rot 4 vec4
 I 4dda406a a_pos 0 vec3
 I 4dda406a i_pos 3 vec4
@@ -1727,7 +1737,7 @@ T 4dda406a u_shadow 8
 T 4dda406a u_tershadow 9
 T 4dda406a u_ts_height 10
 P 3b183d8f model.vert model.frag #define FOLIAGE;#define WIND;#define FLOWER;
-B 3b183d8f vert 0 232
+B 3b183d8f vert 0 236
 U 3b183d8f vert u_view 0 mat4 1 0
 U 3b183d8f vert u_proj 64 mat4 1 0
 U 3b183d8f vert u_light_vp 128 mat4 1 0
@@ -1739,6 +1749,7 @@ U 3b183d8f vert u_ground 208 float 1 0
 U 3b183d8f vert u_ts_origin 216 vec2 1 0
 U 3b183d8f vert u_ts_half 224 float 1 0
 U 3b183d8f vert u_model_h 228 float 1 0
+U 3b183d8f vert u_flutter 232 float 1 0
 I 3b183d8f i_rot 4 vec4
 I 3b183d8f a_pos 0 vec3
 I 3b183d8f i_pos 3 vec4
@@ -1794,7 +1805,7 @@ T 3b183d8f u_shadow 8
 T 3b183d8f u_tershadow 9
 T 3b183d8f u_ts_height 10
 P 79b77ed9 model.vert model.frag #define SHADOW_PASS;#define WIND;#define CARD;
-B 79b77ed9 vert 0 232
+B 79b77ed9 vert 0 236
 U 79b77ed9 vert u_view 0 mat4 1 0
 U 79b77ed9 vert u_proj 64 mat4 1 0
 U 79b77ed9 vert u_light_vp 128 mat4 1 0
@@ -1806,6 +1817,7 @@ U 79b77ed9 vert u_ground 208 float 1 0
 U 79b77ed9 vert u_ts_origin 216 vec2 1 0
 U 79b77ed9 vert u_ts_half 224 float 1 0
 U 79b77ed9 vert u_model_h 228 float 1 0
+U 79b77ed9 vert u_flutter 232 float 1 0
 I 79b77ed9 i_rot 4 vec4
 I 79b77ed9 a_pos 0 vec3
 I 79b77ed9 i_pos 3 vec4
@@ -1862,7 +1874,7 @@ T 79b77ed9 u_shadow 8
 T 79b77ed9 u_tershadow 9
 T 79b77ed9 u_ts_height 10
 P b9fc2041 model.vert model.frag #define WIND;
-B b9fc2041 vert 0 232
+B b9fc2041 vert 0 236
 U b9fc2041 vert u_view 0 mat4 1 0
 U b9fc2041 vert u_proj 64 mat4 1 0
 U b9fc2041 vert u_light_vp 128 mat4 1 0
@@ -1874,6 +1886,7 @@ U b9fc2041 vert u_ground 208 float 1 0
 U b9fc2041 vert u_ts_origin 216 vec2 1 0
 U b9fc2041 vert u_ts_half 224 float 1 0
 U b9fc2041 vert u_model_h 228 float 1 0
+U b9fc2041 vert u_flutter 232 float 1 0
 I b9fc2041 i_rot 4 vec4
 I b9fc2041 a_pos 0 vec3
 I b9fc2041 i_pos 3 vec4
@@ -1929,7 +1942,7 @@ T b9fc2041 u_shadow 8
 T b9fc2041 u_tershadow 9
 T b9fc2041 u_ts_height 10
 P f34dce08 model.vert shadow.frag #define SHADOW_PASS;
-B f34dce08 vert 0 232
+B f34dce08 vert 0 236
 U f34dce08 vert u_view 0 mat4 1 0
 U f34dce08 vert u_proj 64 mat4 1 0
 U f34dce08 vert u_light_vp 128 mat4 1 0
@@ -1941,6 +1954,7 @@ U f34dce08 vert u_ground 208 float 1 0
 U f34dce08 vert u_ts_origin 216 vec2 1 0
 U f34dce08 vert u_ts_half 224 float 1 0
 U f34dce08 vert u_model_h 228 float 1 0
+U f34dce08 vert u_flutter 232 float 1 0
 I f34dce08 i_rot 4 vec4
 I f34dce08 a_pos 0 vec3
 I f34dce08 i_pos 3 vec4
@@ -1989,7 +2003,7 @@ T f34dce08 u_shadow 6
 T f34dce08 u_tershadow 7
 T f34dce08 u_ts_height 8
 P 512004a1 model.vert shadow.frag #define SHADOW_PASS;#define WIND;
-B 512004a1 vert 0 232
+B 512004a1 vert 0 236
 U 512004a1 vert u_view 0 mat4 1 0
 U 512004a1 vert u_proj 64 mat4 1 0
 U 512004a1 vert u_light_vp 128 mat4 1 0
@@ -2001,6 +2015,7 @@ U 512004a1 vert u_ground 208 float 1 0
 U 512004a1 vert u_ts_origin 216 vec2 1 0
 U 512004a1 vert u_ts_half 224 float 1 0
 U 512004a1 vert u_model_h 228 float 1 0
+U 512004a1 vert u_flutter 232 float 1 0
 I 512004a1 i_rot 4 vec4
 I 512004a1 a_pos 0 vec3
 I 512004a1 i_pos 3 vec4
@@ -2049,7 +2064,7 @@ T 512004a1 u_shadow 6
 T 512004a1 u_tershadow 7
 T 512004a1 u_ts_height 8
 P b964507f model.vert shadow.frag #define SHADOW_PASS;#define WIND;#define ALPHA_TEST;
-B b964507f vert 0 232
+B b964507f vert 0 236
 U b964507f vert u_view 0 mat4 1 0
 U b964507f vert u_proj 64 mat4 1 0
 U b964507f vert u_light_vp 128 mat4 1 0
@@ -2061,6 +2076,7 @@ U b964507f vert u_ground 208 float 1 0
 U b964507f vert u_ts_origin 216 vec2 1 0
 U b964507f vert u_ts_half 224 float 1 0
 U b964507f vert u_model_h 228 float 1 0
+U b964507f vert u_flutter 232 float 1 0
 I b964507f i_rot 4 vec4
 I b964507f a_pos 0 vec3
 I b964507f i_pos 3 vec4