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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。
/ a9 r' {5 B5 a, a- importPackage (java.lang);4 {* B6 L! {! x) s
- importPackage (java.awt);$ t6 n" F0 m" F# _" q5 M
- 2 @9 K" J; i2 z+ @2 P1 O4 z
- include(Resources.id("mtrsteamloco:library/code/face.js"));. Z, r' {. C: l: d: A
- & i/ T" e" V7 x# I7 i7 G* Z- |1 d
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);2 d7 _0 n. e, q# X4 I6 ~5 b. _$ h
H, C$ p% v, B; y- function getW(str, font) {0 x1 W0 A, ] B, K* s" j3 F
- let frc = Resources.getFontRenderContext();. }. H- ^( }0 _ P
- bounds = font.getStringBounds(str, frc);
* s& z! _, `5 K" L, u! _: c' {0 K - return Math.ceil(bounds.getWidth());# R8 m: O7 |4 b& Z
- }
* G' o2 ]" O1 c/ ?8 B# z0 @( G - 4 Z/ c. A3 P" `, k0 M
- da = (g) => {//底图绘制8 T. z/ x: P u7 ~1 n' t
- g.setColor(Color.BLACK);
3 O# r$ n r+ _8 @% T - g.fillRect(0, 0, 400, 400);
0 i' l1 S4 g8 \& p7 C0 s+ M' T+ u - }# f. \2 ^) v9 J" D& ~7 T ?: {
: Z- r5 K5 W# W5 A; H& M* S+ O6 E- db = (g) => {//上层绘制" Y' z/ o7 A, k3 B# W d0 ?
- g.setColor(Color.WHITE);" \1 t3 w% x8 R" n
- g.fillRect(0, 0, 400, 400);0 p0 o' t" g; {: X+ z
- g.setColor(Color.RED);
0 q, q- F+ ]8 a* v6 T, ?9 b8 K* {5 z! s - g.setFont(font0);( y8 \) h& H/ z' H. y( K
- let str = "晴纱是男娘";/ r' o G! L" X' o) G) A1 D0 R7 A& ^
- let ww = 400;
1 M/ H/ E, F. m8 D- l2 T( i - let w = getW(str, font0);8 Z% L0 B4 ~) O, e- G V
- g.drawString(str, ww / 2 - w / 2, 200);
4 A) Y9 ~1 v# S, w7 O5 E - }
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- const mat = new Matrices();/ X5 X5 `5 i# r) K8 `. [& R5 ~% n
- mat.translate(0, 0.5, 0);
& h# W7 \- Q+ G* }* L - 1 m4 x+ G, m4 N* p D5 ~* t/ P* V4 m! b
- function create(ctx, state, entity) {
3 i5 ^2 m) i6 A - let info = {
1 x- t; E" c" m; W - ctx: ctx,+ f$ f* w# Q2 \, y
- isTrain: false,$ y5 [3 g7 G: c) ~
- matrices: [mat],
: w. d* v3 t% U7 B - texture: [400, 400],
% w, S3 L4 e8 F$ N) y - model: {
$ Q4 o; K. m/ w Y9 @# H4 l/ Y: Q - renderType: "light",) ~7 ]* S" t$ c
- size: [1, 1],( D% w8 M' [4 F# }* {" j
- uvSize: [1, 1]
z+ i6 D5 d. @# { - }
8 C! x* Z9 i! F$ X5 N - }0 \/ ~' Q& Z; x* \
- let f = new Face(info);# r- E6 O* h& s' s6 z
- state.f = f;! H, m& Q8 f/ u; E2 G
- " e1 I# J/ \6 c: x- B9 K* m
- let t = f.texture;5 j5 R$ V. t6 T
- let g = t.graphics;* }6 X( T- K% T: ]% h0 Y) S& v5 H* ~
- state.running = true;2 d8 [0 Z f' X Q" W& m
- let fps = 24;- x* b2 p# X$ G6 Q! s, w( y
- da(g);//绘制底图
" `2 e- V' f# A8 ?" r5 }& e - t.upload();7 ] @! U: S5 D, [4 F! P4 u
- let k = 0;
4 a) W) I4 c! I9 ` - let ti = Date.now();* p' ]$ O7 V: ^: _+ I
- let rt = 0;
) s2 E. g# {. F0 M- }; v( E - smooth = (k, v) => {// 平滑变化% X0 D( f' {, }/ l& n0 d+ g8 j' b
- if (v > k) return k;
# ^( I% i5 N4 N) c - if (k < 0) return 0;
( C4 q% i% Q2 \1 b8 h, X& L, h r - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
( {" o% z8 e: v8 m7 b- [) h - }
% E J$ |0 S3 z! t8 O7 H3 a7 m* E - run = () => {// 新线程
' f% Z _2 e: Z8 r - let id = Thread.currentThread().getId();
% Z- w- N9 [1 Q0 ] F - print("Thread start:" + id);* ~4 @! W) \0 {0 E9 f& V( N
- while (state.running) {7 L6 }/ O. [; T( `# j _; T
- try {- f. @* [4 J7 `0 ?# j
- k += (Date.now() - ti) / 1000 * 0.2;
, R% s" E7 Q" m$ H - ti = Date.now();
3 C1 t+ B2 d( I/ C, A3 J; E$ U - if (k > 1.5) { J1 Z- Y# P# W3 j Q* f1 O
- k = 0;
4 \, ?, t9 H! p/ R/ L! k - }
; y4 W/ }) x2 Q0 x - setComp(g, 1);
- A* I' K' U5 p! w. f - da(g);
& O0 J! k5 ?/ d1 t3 r5 _% R, ^; b r( n - let kk = smooth(1, k);//平滑切换透明度3 Z( K! u+ W. Z# {
- setComp(g, kk);9 o" s6 a. K9 N$ V" o
- db(g);
; S3 q2 V) L- K* F* o - t.upload();
; D: P: Z0 z% Z; W) }1 M. `' P - ctx.setDebugInfo("rt" ,Date.now() - ti);
/ t4 n/ x8 d% [) e0 y - ctx.setDebugInfo("k", k);
/ y& D( J: E8 f- c - ctx.setDebugInfo("sm", kk);
. s2 Y9 ~5 t: P) B: S0 z - rt = Date.now() - ti;( P- j, D& w& Z/ S# S
- Thread.sleep(ck(rt - 1000 / fps));
! I Y1 L- p' A4 c" K; Z - ctx.setDebugInfo("error", 0)
& x/ U% ` N0 W - } catch (e) {
+ c9 X) N1 J, ^; ^$ M - ctx.setDebugInfo("error", e);3 e% @5 B: O* C& I) n* h; G& N
- }
; C" P, f5 d& @ - }
) V4 S+ A7 }" F' X! S' e/ o - print("Thread end:" + id);
. g: N [" ]; i. h* q4 Z - }/ g6 p5 z2 E5 e: A8 W, y+ w
- let th = new Thread(run, "qiehuan");
2 ~$ ~3 v' S" p. T( Q - th.start();5 z5 ]% b; {; s. ~) R* l$ Y' b
- }* Z* O: B3 u6 p; A5 `
+ M7 A" g% V& w- function render(ctx, state, entity) {. S6 j0 B0 i" q2 e# h' e
- state.f.tick();9 t6 z+ K* f& [# v# c
- }
6 H( R0 ]& ?( S/ Y% ?& d) h - ' I, I F3 L. L% x3 B* z) |0 h
- function dispose(ctx, state, entity) {
0 j/ T" Z* m/ h" H$ ?5 f - print("Dispose");
z- V/ _/ H c* T4 G - state.running = false;, C& g: k8 D2 r. V% i1 {3 a
- state.f.close();
: g8 `: c" y9 P. I* n- C - }* }1 g" B8 F! q$ X
- 1 h& `2 i% o+ G# N' `
- function setComp(g, value) {
, I; m. g6 a! P- i+ P" W - g.setComposite(AlphaComposite.SrcOver.derive(value));$ s" H; S/ p6 p- D! W; l
- }
复制代码 & @- f, I/ M9 w h
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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5 H: P3 d% j; _5 K6 q顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)5 c0 c7 d3 Y+ n7 Z, [
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