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$ s, N" g. Y! b: K1 X9 @' q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。
6 R' ^/ t6 G9 Q$ j- importPackage (java.lang);. f/ M: _) T7 l3 o
- importPackage (java.awt);
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0 |4 y- a# ?1 r: K( |3 j, `# G. _# X- include(Resources.id("mtrsteamloco:library/code/face.js"));
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/ w8 P3 c, D/ e' V: r& ]' E- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
1 E5 v2 _$ q$ w3 s - * U9 r1 V8 h% q+ r# P9 X, q9 |
- function getW(str, font) {
^ l* C& h; N; O* I1 e - let frc = Resources.getFontRenderContext();
3 v. q* s- ^1 \' D) M - bounds = font.getStringBounds(str, frc);
0 r$ k% w* U( T - return Math.ceil(bounds.getWidth());
: z% w( \. X, f) x( T - }" _& h( q8 ]; M$ l8 h
: P% M2 P3 w/ |0 l# U- da = (g) => {//底图绘制
) U+ E: x* [6 z6 ]4 K - g.setColor(Color.BLACK);
4 Q* X; Z8 T% f. V. S' r - g.fillRect(0, 0, 400, 400);8 O3 Y4 Z# ^& d( g
- }
! m. g* X9 Z( C- p. K
% L# d+ `) u: d v4 {& ~; D- db = (g) => {//上层绘制
% o9 u* Y( i! i& l - g.setColor(Color.WHITE);! o, z/ h9 v7 x/ W1 j7 G2 m6 W @- c, h
- g.fillRect(0, 0, 400, 400);' J$ T$ ]3 q' ?- s, ~
- g.setColor(Color.RED);
6 J, w2 V6 b$ Q: W P$ _ - g.setFont(font0);
$ p& I/ ~3 t) o9 E- @5 u$ ~ - let str = "晴纱是男娘";5 B* z3 c! I% u+ W
- let ww = 400; t) ~& R9 s# n1 k# F4 h
- let w = getW(str, font0);
* q/ Z. |) j" X" | L) l8 F/ n0 y - g.drawString(str, ww / 2 - w / 2, 200);' S; X3 h+ ?* h6 }8 m
- }
( B( h4 q6 _6 ^
/ V1 }9 d! a6 a$ v6 P# q: o+ {- const mat = new Matrices();2 T% D8 X4 }3 X/ Q5 r9 [
- mat.translate(0, 0.5, 0);
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4 {: D6 q( G& W C w- R- function create(ctx, state, entity) {
& ]) T% C4 H" {( m& A - let info = {
& J& m3 x# i I6 \. R - ctx: ctx,
5 ~% K& }, U% J1 d. u: R% A - isTrain: false,
/ q5 F8 k# Z" ^" W" ? O8 e - matrices: [mat],+ C% g. s5 J; S3 }, o$ g0 L
- texture: [400, 400],& G3 l4 F) F @* S7 a
- model: {
; m$ R1 L! a4 y9 [3 r% H - renderType: "light",
( u; [+ \3 @: M( f$ j0 k% ^# s - size: [1, 1],/ O1 J! c; P/ Y1 a5 q% y
- uvSize: [1, 1]
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- }
- q* `" S5 v, u. D1 ] - let f = new Face(info);
1 }3 u+ ?- G- h - state.f = f;
6 t+ X: n, \# ]% _ - % l T0 F8 y7 K7 k5 f
- let t = f.texture;
3 r- X5 v2 V. J/ B$ W - let g = t.graphics;
1 i7 c7 }6 m6 s; S - state.running = true;0 {! s; `" L: C& B
- let fps = 24;
, r0 h& b2 _: y2 ~ - da(g);//绘制底图
_! [5 G4 G. \ - t.upload();
2 m8 g' D5 X. P9 M9 o - let k = 0;
8 h8 k* g3 D9 B; {: g* s - let ti = Date.now();0 h* S3 l0 @ m9 w
- let rt = 0;8 B; O1 Y- A+ B7 k { p
- smooth = (k, v) => {// 平滑变化2 i) g% a& k1 p9 v3 Q+ l% m4 g7 L
- if (v > k) return k;* P* ?/ Y+ R2 S5 z/ Y
- if (k < 0) return 0;
1 j7 L1 R6 I1 V- s- |: q4 U! i* f - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
. e+ {/ R; r! G; {# o4 m- ^ - }
# A" @, n2 b& [3 b0 q. ^! E - run = () => {// 新线程# l$ i8 L- e0 L% |
- let id = Thread.currentThread().getId();
" n% M% I$ z0 r: Q9 i# S - print("Thread start:" + id);
. k+ c- l9 [: ~ - while (state.running) {, C; X+ _! m% _6 Y. M0 L" F5 k
- try {
& h; n8 H. y3 X m$ b - k += (Date.now() - ti) / 1000 * 0.2;
, D5 {! u+ v9 l! K; K O( k) i - ti = Date.now();
8 k( o+ y7 } } - if (k > 1.5) {
4 b5 S5 l( T2 K3 l P- f - k = 0;
* ]! ~8 Z( ?6 S9 | - }
) U) ^% l( D7 b4 l$ t3 ^, M - setComp(g, 1);+ e7 j7 F- S" h3 ?
- da(g);1 q, C& F7 w0 \. o" Z
- let kk = smooth(1, k);//平滑切换透明度
$ L9 q# L1 z7 E( ^- y - setComp(g, kk);% Z# C" f" Z4 h
- db(g);
. G4 p2 v# }% f! U3 V; ^ - t.upload();
; s" j, Y; g( |" c+ Z$ G: @ - ctx.setDebugInfo("rt" ,Date.now() - ti);
7 S, H' p8 D- r - ctx.setDebugInfo("k", k);' M1 C% L% \; ]# X
- ctx.setDebugInfo("sm", kk); X$ J+ V/ ]4 g
- rt = Date.now() - ti;. y" P5 D: o. f, L% e8 W
- Thread.sleep(ck(rt - 1000 / fps));+ s4 \0 P& K& x
- ctx.setDebugInfo("error", 0)$ P9 U' ?6 @$ _9 K* E
- } catch (e) {; z4 h! p c K) K2 S
- ctx.setDebugInfo("error", e);
4 q7 t# H0 [& |8 X - }: q7 w' S' A% C. q( N
- }4 v9 h2 h( ~1 T0 E% e$ S
- print("Thread end:" + id);
S; a4 K8 n3 r0 P8 _7 o - }
5 p" v0 ]& _' o8 v# Z s7 | - let th = new Thread(run, "qiehuan");7 w$ V, M8 B1 j# u# T
- th.start();
% L1 x P/ z6 F' ^# ] b - }
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- function render(ctx, state, entity) {3 ~, d$ W& @ l7 ~2 _6 i
- state.f.tick();
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- 4 a; ^' \8 x3 q
- function dispose(ctx, state, entity) {! F7 n' Q6 c0 b% s# c
- print("Dispose");
) l0 r$ _$ Q- D. U7 U$ w/ v - state.running = false;
. s; H' d, N5 V- x& {. y6 J - state.f.close();
3 z5 ^6 ?7 u7 G+ Y - }. O6 y- D/ A5 x6 F% R+ e0 l
/ r" F: D. M4 G# b9 n# u- function setComp(g, value) {0 B, G7 A6 B2 T+ _( {) Q; f
- g.setComposite(AlphaComposite.SrcOver.derive(value));0 y5 `$ u$ B! J; }
- }
复制代码 # v. t- _- Z# V
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。0 B: T, @! n+ q% Y. `9 D' S/ z4 I
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% v1 M5 @& J% @! w- o+ i5 `$ ^1 J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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