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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。& Y' w, w+ O: w/ U! _
- importPackage (java.lang);
" u$ |) ?' U4 K" v d9 ]0 v/ o - importPackage (java.awt);
$ h6 s! ?9 `# u( } - + { v# E5 G7 K+ a
- include(Resources.id("mtrsteamloco:library/code/face.js"));
- K* W9 h2 }5 v: ~/ Q; H3 @7 c3 @ - ! J* t C! `. b8 G: Y. g
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( l) q; e7 H1 H$ r4 Y* t/ z
3 V6 |7 u" e- W) e+ b/ C% O- function getW(str, font) {9 a1 [7 N* v2 {$ a+ B# Y% y
- let frc = Resources.getFontRenderContext();8 o9 d8 E, A, m0 ?' S4 k V
- bounds = font.getStringBounds(str, frc);! W2 U- C$ Z* g" ~
- return Math.ceil(bounds.getWidth());
, w! R1 \; j# @% {: o+ c; d2 W - }' z# c% `4 i& [; O& B8 U2 J
* \# N( }) i8 Q. o- da = (g) => {//底图绘制: G: C, H! J4 \
- g.setColor(Color.BLACK);
: ~1 D4 e+ z$ k6 T$ B$ T - g.fillRect(0, 0, 400, 400);
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, r3 E; a9 K* W" A! k0 G, b- db = (g) => {//上层绘制5 T3 K) R: P3 m' L! j0 p" A
- g.setColor(Color.WHITE);
G, _2 ?& d. d: J' U- q) i+ x. K - g.fillRect(0, 0, 400, 400);
3 ~" k5 I6 Y- b - g.setColor(Color.RED);
1 G; r) }- `) Z: f7 a6 Z - g.setFont(font0);
2 U x i9 o* q; n - let str = "晴纱是男娘";
8 Z& l; M, j$ O0 d9 a, C5 ] - let ww = 400;, ?# ]1 n( G1 g; Q+ [
- let w = getW(str, font0);
+ Y2 S2 x' t$ A9 f# c - g.drawString(str, ww / 2 - w / 2, 200);# P5 `4 a. q1 Y; {
- }3 f! O; u% w( @$ i: @7 K
- # y% y. l6 q Y$ I& u" p" W
- const mat = new Matrices();
' l; h9 r1 X- }1 o2 W/ @* w - mat.translate(0, 0.5, 0);% C6 N) U8 p# ~
- # U+ b0 U+ N/ ]0 n+ D5 m& C
- function create(ctx, state, entity) {$ Q" M* ]1 K. t3 H9 `% }" C" @$ u/ y
- let info = {
/ L \' _4 i# O: Z! |) p3 I. m - ctx: ctx,4 I8 k+ g5 t* n- r% M+ w
- isTrain: false,
: t9 K8 A5 x3 O - matrices: [mat],+ Q& s5 k( e0 s$ J
- texture: [400, 400],9 G8 ?8 f, U. j0 C/ F; s0 x# }
- model: {
R3 t$ @+ E7 r1 o - renderType: "light",' A- \ w) e2 X" c' g( p
- size: [1, 1],& V; |! V% W1 H( \0 Z
- uvSize: [1, 1]7 `8 b. l7 m! v8 k9 T
- }( h; p" h- R1 ?% c3 V4 O* ^" S
- }" M$ S$ N% K9 i; j* x+ G
- let f = new Face(info);+ X {* V* @2 C! Z# J
- state.f = f;
+ D/ g2 t" O0 n+ e
1 C: u3 J9 { s' C p" L- let t = f.texture;
) b( v7 {4 g6 a, z& k4 C - let g = t.graphics;
: C7 J5 p$ G) i3 ?6 A. Y5 P. | - state.running = true;0 H* ?6 i- a- P1 {1 L$ H
- let fps = 24;3 t( @& @0 Q N1 L5 b( B, S
- da(g);//绘制底图
2 y2 ~3 i d) }4 O9 ? - t.upload();9 {! h2 M- I4 v, H
- let k = 0;+ U9 M# P( ?9 ` Z* B0 t' e
- let ti = Date.now();$ `8 W! O4 ~1 N$ g7 @+ J2 e9 ^
- let rt = 0;
% o" `! R; v1 L# @ - smooth = (k, v) => {// 平滑变化
7 F: m3 Q* A% t7 E4 S% ?/ [; m x - if (v > k) return k;$ V' T. ^& ]2 o+ F: l
- if (k < 0) return 0;* n" M# m8 ~* B0 ?# \& e
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k; n, p: O8 h& u6 L5 r; \) W
- }" R" l+ n. i& h3 g6 F
- run = () => {// 新线程) Y3 Z0 T/ w; X- p2 g0 v
- let id = Thread.currentThread().getId();
* P5 N& t% q2 E5 C" J - print("Thread start:" + id);
* u. \1 {! S( ?6 C; o) C* S - while (state.running) {
: c9 r* M# Z- J% ^ - try {
4 a+ b/ U: f0 _: v* `% f6 x0 T, G, u - k += (Date.now() - ti) / 1000 * 0.2;
) {8 c1 z' C2 q2 g% P/ n - ti = Date.now();- r7 V3 ~; d0 ?7 e. y4 |
- if (k > 1.5) {' `; k; s, `8 Y$ O- s7 x6 V' G
- k = 0;* |( F; U5 j& [# a' T1 y
- }3 x) y1 f+ n* x4 z
- setComp(g, 1);
6 \# U2 c7 V$ `4 O2 W0 h1 z1 B' P - da(g);! v( C$ P, O5 Y1 d- b1 \
- let kk = smooth(1, k);//平滑切换透明度9 H$ h" W, b+ F; ~+ s% z" e) @& C- L4 ]
- setComp(g, kk);
' j% k( k3 S. v8 m4 v3 S* d( j - db(g);0 o6 `. ]9 y2 o- ?7 E7 z+ Q) f
- t.upload();
" t, R9 }! d5 e) |+ n. C" m! S - ctx.setDebugInfo("rt" ,Date.now() - ti);
" Y/ e* T- r1 q& c$ T& g - ctx.setDebugInfo("k", k);; d- c, A* v9 o, I, `
- ctx.setDebugInfo("sm", kk);: M6 _7 k/ a, b( _
- rt = Date.now() - ti;- f$ C- \6 d, }1 Z# w3 r/ M
- Thread.sleep(ck(rt - 1000 / fps));9 Q) P% S( m- p* c+ y t) S
- ctx.setDebugInfo("error", 0)
9 m% A/ D/ L8 \5 l) t) G) x1 C - } catch (e) {: O# n6 S- m8 d) O
- ctx.setDebugInfo("error", e);! S0 g4 H8 _5 A, L
- }' ~5 N9 ]: z( c/ `7 s/ ~
- }* o' P4 A9 w1 U- @8 J
- print("Thread end:" + id);
) z5 V7 k4 `) `& T- Y - }# i6 N: r: ]& Z! R9 j
- let th = new Thread(run, "qiehuan");2 S. M3 t) M; t4 q, v7 {
- th.start();6 n7 W, ~3 G% J% G
- }
$ Z& [# u T( Q9 s - " p; t: \' Z2 } R; p
- function render(ctx, state, entity) {
# |: x6 [6 r8 Z1 E - state.f.tick();
; z M1 K" f: G# h: | - }0 g/ ^7 ?; w8 n( k! y$ g S7 R/ V
- % s! z$ g/ H: {' c! S" ]3 W
- function dispose(ctx, state, entity) {1 K9 S3 @8 U% }" f0 W( m! K
- print("Dispose");# V( V/ V$ Y! { f+ b/ C1 M- b
- state.running = false;
0 f/ U' h/ S: b - state.f.close();
6 y/ m8 F6 m3 p: K' n6 C) N - }
/ T/ G1 ^% [: z) J* \ - ' Y) \8 {4 Y) o; l7 }% g. g
- function setComp(g, value) {& d3 I/ ?/ i; d3 V" y9 H
- g.setComposite(AlphaComposite.SrcOver.derive(value));: F+ A5 @' p7 e C
- }
复制代码 . ?2 @7 V- `" Q4 i; T( K0 {
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 T& Q- Y2 Y4 t3 T, l1 K
9 ]+ d& Z! v0 ~7 Z2 R
7 T. P- A7 j6 x" ]+ S/ Y顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)! C1 X6 F$ j7 G0 c' i
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