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这些天想了想怎么给LCD做丝滑的动画,稍微想了想,便有了下面这些代码。! x6 q4 Z, [) G; h1 L/ N
- importPackage (java.lang);: h# |' d5 K$ n
- importPackage (java.awt);9 y+ R. v& W) s1 H9 v; M- \
- 1 A B! Z* k* p# ^7 r
- include(Resources.id("mtrsteamloco:library/code/face.js"));" e' C/ z5 ~* x6 w2 b
3 N1 p1 o4 E! c9 Z" Y- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
5 M" C8 s3 X5 y# c) P - # b' _- ^. q/ l- Y" T7 Q
- function getW(str, font) {% t4 ~8 k4 a3 E! u* S* q
- let frc = Resources.getFontRenderContext();
& V2 M% t9 v0 X - bounds = font.getStringBounds(str, frc);( r! {5 ^* A4 c' z5 W7 C
- return Math.ceil(bounds.getWidth());
' |3 |" e- w; s- m2 e - }, r7 A. ~" P- P+ o/ i
- 6 W5 E. s8 d/ _: n3 z
- da = (g) => {//底图绘制
3 t5 P4 H. V( c' I" j/ G9 @ - g.setColor(Color.BLACK);7 d% W: D2 ]; u
- g.fillRect(0, 0, 400, 400);
/ l8 g' O1 G. U7 Y; k0 } - }
, I% \3 o) M" \* C8 f) `) X - : a% k5 X' H* q \
- db = (g) => {//上层绘制0 u) M3 z1 U- e5 m
- g.setColor(Color.WHITE);$ F6 h- e' A- s' C3 j# w1 Q
- g.fillRect(0, 0, 400, 400);" D7 ~3 ^9 w% d( }
- g.setColor(Color.RED);$ Z. S% y( `: I1 B6 C4 p: h
- g.setFont(font0);
l! u L" r# _: h5 A1 z - let str = "晴纱是男娘";
6 l+ s6 A# I) d. k/ b) |' d2 Q4 w - let ww = 400;
' E8 u+ Y) R( ~/ h) u( w# {, R - let w = getW(str, font0);! D1 O5 O" I9 s3 ?( g- z
- g.drawString(str, ww / 2 - w / 2, 200);4 ?% E; p+ G9 q ^2 u, }
- }2 m: V2 ]3 B8 Q! \# E8 ^2 V
! n/ G/ r( c4 x- const mat = new Matrices();
3 w) L; P2 u# x, Y- `, U X - mat.translate(0, 0.5, 0);/ l! `! y; Z! |3 f1 S. w L
- j a7 d" c" N+ m0 w- b4 Q6 P
- function create(ctx, state, entity) {
/ | [* e3 T- p# V - let info = {! g7 l( l' r1 N( b0 z
- ctx: ctx,
) [# ^* K* f' L- a- x6 Q* L% h - isTrain: false," ]9 B# e. {2 ?& m, i
- matrices: [mat],6 I8 a4 {1 a7 F, H1 s+ N b+ }
- texture: [400, 400],
- ?: Y+ {* J3 u6 G - model: {
1 ^8 e, m) I7 L* ~' z R4 f - renderType: "light",
# e4 l& ]: P5 r% v e x; O. _ - size: [1, 1],8 k& n0 r1 v* q6 ^" {( A1 V R
- uvSize: [1, 1]' B- v4 ^6 W7 s% ~) n
- }
* \6 C" M2 W, @. d% O* L - }1 J: N- V" y1 W. ]
- let f = new Face(info);
! ?3 k# O+ q6 ?5 Y% l. k - state.f = f;
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- let t = f.texture;5 N# h: ^4 R) p! Z% `. \9 @5 c5 d J
- let g = t.graphics;
+ D: c/ e2 E* S9 J" S. R: t+ { - state.running = true;) y! n4 d% W' }/ l \
- let fps = 24;
5 L3 N4 \! }) h J9 z - da(g);//绘制底图
0 F( Q. p; U3 Z. C! K5 |! U" b - t.upload();/ A. @ G @# S9 i/ E
- let k = 0;( l6 ?; L( T p( ~* }5 E
- let ti = Date.now();
' u7 l. ^$ G5 r5 n. S2 O# O8 O - let rt = 0;
w5 }: d7 x2 h2 t1 a - smooth = (k, v) => {// 平滑变化
, P, s) k6 q- L4 [4 n - if (v > k) return k;
% @1 u4 Y4 K' R - if (k < 0) return 0; `0 s" |3 Z M( a
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;! D+ N1 b: e' O# e) ^8 b
- }
8 q# h" g9 s G0 ]$ w' T P - run = () => {// 新线程2 {% l( M. W O0 a7 h8 N: T9 w
- let id = Thread.currentThread().getId();- s# L8 `. a4 O9 [" Z
- print("Thread start:" + id);
; D4 i5 v; k" W8 f8 o - while (state.running) {9 ^( K$ @. M; h% z% c5 I1 L" ]
- try {8 C& ~5 [6 Q0 ~! |; q0 `
- k += (Date.now() - ti) / 1000 * 0.2;9 ]3 ^7 I- q" Q9 e% F w
- ti = Date.now();
& c' {" y4 r) W L - if (k > 1.5) {
; v( o* j3 @. Y' V - k = 0;
8 o0 o% T* [1 e( ~! l - }
& D, n$ k. _8 n - setComp(g, 1);- z* b" g# R* o) a0 u( z: \
- da(g);1 V% @- ^* g( U7 [0 @3 W0 y
- let kk = smooth(1, k);//平滑切换透明度
) w2 H7 u! u( I5 h - setComp(g, kk);
9 I; W; X# G% [ - db(g);
: Q. C; x. Q: |0 O - t.upload();
; Q* n5 H: X6 ]/ z - ctx.setDebugInfo("rt" ,Date.now() - ti);3 \% ?1 H2 i( ^4 m1 A6 _$ c/ {
- ctx.setDebugInfo("k", k);
) s2 [5 a+ N3 I - ctx.setDebugInfo("sm", kk);$ b9 P+ D8 M! |
- rt = Date.now() - ti;( \# {6 H( j3 x6 @
- Thread.sleep(ck(rt - 1000 / fps));
1 r, Q- g0 Q' E L& W) n1 @ - ctx.setDebugInfo("error", 0)
( k+ L( U4 f. a5 j- K - } catch (e) {7 Z& c6 F3 t% y
- ctx.setDebugInfo("error", e);$ o0 `& I, w- x
- }
9 n; a6 o$ s) \% [ - }- [$ Y$ S/ U$ g* g) p% k- s
- print("Thread end:" + id);" Q3 q j" P! J3 Y
- }
$ E6 [. z7 u! l - let th = new Thread(run, "qiehuan");
' a. p$ I& G1 v3 Y& C - th.start();
2 Z0 a9 {! L8 Y0 Q) { - }
]$ ]* }$ m, R$ E - 2 z/ V! q0 y# c. p5 |4 v
- function render(ctx, state, entity) {6 D6 d7 H& g- V5 t, L5 ^
- state.f.tick();& s7 |( h+ \% }. G; M+ P
- }0 F5 i, Q/ Y. m6 `4 @' o! C' k; e
7 r7 B$ Q, L4 [, K! m8 h0 D( ^0 U5 k- function dispose(ctx, state, entity) {4 P* r0 t/ F# h8 H4 R# v+ [3 o
- print("Dispose");1 F2 I. @# @2 n2 I; T& z: U, b
- state.running = false;8 j+ e% o0 T; f% o- ^4 K" \; b8 j9 q
- state.f.close();
, G- j" E G) q4 e; V - }
- n6 Z: A/ o( ]# r - 7 O1 M4 X; Q0 X+ n1 v1 F; S
- function setComp(g, value) {
: t5 Y4 M5 s7 N! a$ s0 T4 Z - g.setComposite(AlphaComposite.SrcOver.derive(value));; R" n# a" H& o2 E) T
- }
复制代码
" ^$ n) V: s: x* Q1 y9 o4 g1 p写了这么久的js,我便渐渐发觉使用 render 来写更新内容有局限性,比如说会拉高延迟.....等等(但可能也没什么影响?)。在这里我用新建 Thread (线程) 然后在新的 Thread 里来处理图片更新逻辑,实现丝滑切换。: ]! z$ Z& P! M
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4 E1 s1 u& T! V+ P# L顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)0 T! S6 I! G& N( _$ R4 Q" z5 J
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