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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。; x y0 q2 F4 j' `( Q; e- Q
- importPackage (java.lang);- u3 a6 k4 z# t' `. N2 o
- importPackage (java.awt);' ]3 J7 ]* E @* h
% l3 g9 Y7 p e' o, P- K6 {& ~- include(Resources.id("mtrsteamloco:library/code/face.js"));0 v6 m4 ?4 b2 J
( K1 _ F! B* H; L* i- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {5 t3 D; w I6 [0 e# |& V- _; w* ^8 G
- let frc = Resources.getFontRenderContext();
; b7 {5 r8 v) d* ?0 R' p - bounds = font.getStringBounds(str, frc);; ]- A# |7 k: z, O3 g$ S5 d
- return Math.ceil(bounds.getWidth());
5 u3 B5 a; _: s0 s - }
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- da = (g) => {//底图绘制
+ ^3 ~1 ~ G+ M - g.setColor(Color.BLACK);
* g6 O: ~4 T) g) | - g.fillRect(0, 0, 400, 400);
; c0 q( r* C, i4 k8 F - }8 P) h9 D0 I$ |$ O' D, o) j0 o7 f
! Z2 D, M' l2 C: Y& u5 Y) w- db = (g) => {//上层绘制
- Y, p7 P( r9 w- F- \" O - g.setColor(Color.WHITE);% t R& j# |: S" Z; B; f
- g.fillRect(0, 0, 400, 400);. U5 F& p# y2 e2 q" m
- g.setColor(Color.RED);" `) M6 o/ `, s
- g.setFont(font0);
0 j! I/ V" n/ j/ a - let str = "晴纱是男娘";
6 i; `/ T+ a. e2 r7 s5 z) C, E - let ww = 400;
1 H# Y5 j" g( x, Z* o - let w = getW(str, font0);
8 r4 k! I3 L% J( k: v7 Q8 b# i* ] - g.drawString(str, ww / 2 - w / 2, 200);& Q7 \6 _% V( U9 s$ x6 I
- }% C# M5 O; v- l& w( r9 C- [
2 e) T% K( V0 b9 {1 o# P: z% I- const mat = new Matrices();5 c8 k5 H, k8 K) U E/ a
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {4 p& D0 e+ s! ?; B+ k+ Y/ d5 o
- let info = {
/ a) g' |1 R R - ctx: ctx,) x6 W1 ~' ?$ y- P; ] j8 |& Y
- isTrain: false,
, x/ Z9 e6 e4 l }6 j - matrices: [mat],
6 \- z; I* K3 p" }0 K' V6 u - texture: [400, 400],& i7 D- d+ `) E: ]" P
- model: { ]& v/ K* |" g; T' ~
- renderType: "light",
8 H' F9 I, s; z0 ~ - size: [1, 1],2 z: X. x/ P3 e- R
- uvSize: [1, 1]/ ]$ R" N" Z+ s2 K. K
- }
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- let f = new Face(info);
; D& w9 f- t3 z9 q& ^8 F' o - state.f = f;
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5 J; h% K$ b& s* H$ z- let t = f.texture;( d; G5 r- p6 e
- let g = t.graphics;2 r2 c2 P: ]' h. V
- state.running = true;
. g) \4 O8 I# m; s - let fps = 24;$ `- o! P- d3 `* \/ J; N
- da(g);//绘制底图* x/ S `* I5 ~: d$ \. b8 J: m* \
- t.upload();8 `8 o2 i; t% V- A
- let k = 0;& N, V6 f: |3 h6 d0 A7 M) Y6 J1 V- c
- let ti = Date.now();$ r" ^5 h c% E2 W5 P0 ^4 U. i
- let rt = 0;
" C7 f( s' w7 \ - smooth = (k, v) => {// 平滑变化
% {6 D. z8 r8 R! X9 z$ J8 U - if (v > k) return k;
5 I6 T, ~" k7 f9 A8 V6 _ - if (k < 0) return 0;! B& ^ L% ~- N ~& M2 r _
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;, t& j0 E, y, i6 ]" H
- }" r/ o% D( Q" y: V d. T
- run = () => {// 新线程
, N1 k' F* l ?' _ - let id = Thread.currentThread().getId();
7 C: ~; w6 n! C, X2 U1 T9 w - print("Thread start:" + id);+ _: P; `1 @- t4 O* a1 a7 w
- while (state.running) {3 F- ?4 L; H5 l/ G& j; e: |+ ~
- try {
6 b D& e, f+ H# \ - k += (Date.now() - ti) / 1000 * 0.2;* B: L1 X- |% g; M6 ~
- ti = Date.now();
; Z7 R- U0 N4 h - if (k > 1.5) {
% ~9 `7 V g/ s! O$ A3 J, z - k = 0;" o+ T7 C. U* B% m) {
- }0 A. B5 _5 w# M9 g- R/ I; l
- setComp(g, 1);& e/ n; |0 E5 X" u" f7 h
- da(g);
2 L/ E5 [4 W7 X( R! d - let kk = smooth(1, k);//平滑切换透明度: P5 \2 q1 Z5 i
- setComp(g, kk);5 I( ? J& k+ k+ h$ Q/ B
- db(g);4 m" w, R% Q' o# ~6 j
- t.upload(); B" S% B0 s+ o- Q& O! _
- ctx.setDebugInfo("rt" ,Date.now() - ti);
: P( w" I& E! s - ctx.setDebugInfo("k", k);7 \7 N" B; {) A4 p4 T, j) s
- ctx.setDebugInfo("sm", kk);$ W4 {6 O7 Q) B* W D2 F
- rt = Date.now() - ti;
% N* Z0 ^9 U5 Z( o: Q/ K - Thread.sleep(ck(rt - 1000 / fps));' j5 r; r, \. T
- ctx.setDebugInfo("error", 0)/ E @8 }! n8 h) J; z9 g+ L' u4 ~
- } catch (e) {
( o( n1 B" |0 a/ A/ v/ g; b - ctx.setDebugInfo("error", e);+ K2 h* Z4 X0 P% L1 L& K7 C7 ?
- }, ?: v8 A- D2 e+ j" B
- }5 n# F& e0 X4 [
- print("Thread end:" + id);1 W0 d9 |( r4 K) B& o9 m9 p5 ^
- }
" a" Z. Z; d2 F5 j - let th = new Thread(run, "qiehuan");
9 [8 d5 S; P/ D - th.start();
6 ? P# T0 L5 Z' p0 [ - }
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' x( a3 [5 N) k, Q- function render(ctx, state, entity) {3 ^/ K8 m8 [5 K& _, E- p$ _* i- o/ l* _
- state.f.tick();
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1 q8 Q, i# Q7 |1 H V' `1 ]7 K- function dispose(ctx, state, entity) {
5 l, i1 |- V) S7 g) \8 ~ - print("Dispose");
- ^4 p7 f4 C+ L5 `5 Q. X( K; ] - state.running = false;
# d0 E0 n9 Q& ~% N% _ - state.f.close();( Q6 O- k! M9 i+ G! R$ E( x. s2 _5 G
- }
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, B3 q% ]9 T: n0 q$ s8 [7 b, U# O- function setComp(g, value) {' k7 p" C" |; l6 `0 D1 ]
- g.setComposite(AlphaComposite.SrcOver.derive(value));
: u+ [ k- J2 Y* j; ?7 J& e! J - }
复制代码
' m H. R1 Z9 \- c) j4 l, }+ ?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。
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7 y# h* d0 @# z# ]- X顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)
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