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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。# ^/ Z2 y7 |! b
- importPackage (java.lang);2 W, N& I( }$ ^. l
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);, S' D ]7 |3 a$ K9 }' s
- : B, F8 F: N" V, E7 s
- function getW(str, font) {
7 F1 G- @! B& L# ~9 \ - let frc = Resources.getFontRenderContext();/ E5 u! U6 Y3 k4 }
- bounds = font.getStringBounds(str, frc);: W7 A# k( j- C* x3 ?0 B
- return Math.ceil(bounds.getWidth());5 I" m5 |* b e
- }7 Z5 A' B: ^6 ?
, V3 j8 z: O% `& q% s: E- da = (g) => {//底图绘制3 ]2 [8 U9 b! Y; `
- g.setColor(Color.BLACK);
5 L6 C$ s" F3 g# G - g.fillRect(0, 0, 400, 400);' ^* z! P5 t6 ]8 Z; @2 y
- }
- A' w; `) E, P7 c. T; y# F& b
, P+ T1 V* V; @4 s- db = (g) => {//上层绘制
* s& r7 g8 I5 {, L6 S& Z - g.setColor(Color.WHITE);
/ K$ {* V2 d& m1 K2 Z3 c4 }- P - g.fillRect(0, 0, 400, 400);( |3 o5 x. H o2 O
- g.setColor(Color.RED);8 {0 v" d* M) v
- g.setFont(font0);
5 T- k* S( {, |, Z - let str = "晴纱是男娘";6 G6 {" u7 e3 W9 O2 ?" N( H
- let ww = 400;& C: Y, A5 P* p* i$ ]$ z
- let w = getW(str, font0);1 h( q- j ]4 \! k0 V
- g.drawString(str, ww / 2 - w / 2, 200);& O1 ]8 x" Q# j' q1 u0 p
- }
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- const mat = new Matrices();0 z5 _; c0 [* h
- mat.translate(0, 0.5, 0);+ D q! J* Y2 @
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- function create(ctx, state, entity) {
+ u. H1 e3 P" c) [ - let info = {
4 n' v+ i7 Y U2 m& g - ctx: ctx,
& A2 u0 O0 f# b - isTrain: false,
; N' i9 N- D' f7 F; w - matrices: [mat],/ A. _0 ?$ E% z4 Y t0 z9 Q; O
- texture: [400, 400],- Y+ I& C8 m/ {
- model: {' A4 I5 b) u- A! |3 r1 p
- renderType: "light",
3 S* O1 p2 [. c0 h7 k( A - size: [1, 1],
?# U0 o# e6 X' T7 j! V# y - uvSize: [1, 1]
+ R' a; E* z) `" m5 r+ N4 l - }
0 o1 E1 t( {9 }: @) f2 U - }
. e/ D8 N: V, J, p- y" `! w - let f = new Face(info);
4 x1 H/ x& L5 [4 Y/ _/ P1 Q - state.f = f;
+ D0 o0 N4 @7 \1 P6 z
1 [6 g) g8 f- k# P5 S h- let t = f.texture;' W/ z, \% ^- Q2 K% X
- let g = t.graphics;6 f. }' ]% t6 U5 p
- state.running = true;
9 a/ K2 g7 Q2 t" |3 }# a8 {! Y - let fps = 24;
7 R/ U/ [% a4 w3 w - da(g);//绘制底图1 T# U. g) a8 I7 ]9 Y+ L, `7 V$ m
- t.upload();
( j5 g8 a) K- v+ \( R" \ - let k = 0;/ L9 y% y! H6 h" b7 Y( Z# _
- let ti = Date.now();
+ b& Y) K4 s& F! h: X: u5 b - let rt = 0;0 `4 i) |! h& v0 R
- smooth = (k, v) => {// 平滑变化
/ ~' G1 @; g+ G& }% R, T$ x: y - if (v > k) return k;
" o1 l) F; B. C8 K - if (k < 0) return 0;
; e; ^! k0 `4 \$ p& A - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;! B2 x6 ?7 N0 |
- }
6 H) @+ |! S% T8 K. f; z ? - run = () => {// 新线程
! q' {8 l4 A% |" j' \! }) H# o - let id = Thread.currentThread().getId();
' w: k, C9 @2 D2 X8 B$ G - print("Thread start:" + id);
' w- Q" M6 z- k- ~! t! q* s - while (state.running) {/ L1 ^; c$ j8 C$ z+ Y, a
- try {# @4 Y' J0 v i" i' _/ c% o- y
- k += (Date.now() - ti) / 1000 * 0.2;1 P, m+ x! E' ^
- ti = Date.now();
: }4 L' J- S( C& m- i. c% \! u' Y: P - if (k > 1.5) {
2 E6 l; F: }- _+ x$ R7 |; K- y# _; s - k = 0;
% c4 v. e; ^- ]# B7 s o. d - }
9 M" k! ~; H, N& O" J) s5 U, I! W - setComp(g, 1);
3 \+ `7 n6 j% g2 U - da(g);) C7 s a' i7 s6 p5 n
- let kk = smooth(1, k);//平滑切换透明度
! n4 L" `! N. R - setComp(g, kk);
. [- c( Q+ E+ V4 {5 e* o - db(g); b4 ]: Z' S" j; T z/ I% A; t0 M! d
- t.upload();
/ E$ l* N' D2 A7 Q3 h8 h - ctx.setDebugInfo("rt" ,Date.now() - ti);
$ D) o8 z1 h/ e& c8 k- ? - ctx.setDebugInfo("k", k);
; i$ L6 C0 X! }2 Q- u6 b/ U+ p - ctx.setDebugInfo("sm", kk);
( f B: Q' {3 Y; @ - rt = Date.now() - ti;; a1 t7 C- ^- F( W$ i' z
- Thread.sleep(ck(rt - 1000 / fps));
4 q8 ~; G& A; c* B - ctx.setDebugInfo("error", 0)) x. f8 J- ] E( |0 |
- } catch (e) {
; P8 G1 e5 ?* I7 }5 ? - ctx.setDebugInfo("error", e);
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- } N) Z+ }: S3 a& D" \) d* B
- print("Thread end:" + id);( f% T: N L; [, t! A, x; i7 J
- }
1 {" W, d, j2 a% @- B0 u - let th = new Thread(run, "qiehuan");
7 v" s7 B) Z: B - th.start();
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- 3 J' B8 O6 r* x: w$ C& N
- function render(ctx, state, entity) {% s# n; X! U- l+ Q6 P
- state.f.tick();
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: D- e5 ?% ?9 V. m7 r- function dispose(ctx, state, entity) {0 w/ w6 X+ @. d7 {* x6 _
- print("Dispose");
% m% P/ R6 I- z6 N0 B i: q7 c - state.running = false;# Q% m2 N/ T9 i& a( K4 y. i
- state.f.close();
( L5 e) D% y' M' J. k! [ - }
+ i. u; ]& g, a B* ?
. i+ ` ]( x+ T1 g3 J- function setComp(g, value) {
! G4 `) X) P+ i) E K7 W - g.setComposite(AlphaComposite.SrcOver.derive(value));
. E# w; W' z- F - }
复制代码 ( Q; k; o0 {9 x) 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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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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