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d- P4 n/ s1 @- }; |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。7 T$ E4 x. X% O
- importPackage (java.lang);
6 i4 R; Z) x }" _ k - 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);/ C3 Q7 G- H# }4 g/ @
- 4 c! H$ u0 X. I, a
- function getW(str, font) {$ @+ q' Z" d7 `! F: E' c
- let frc = Resources.getFontRenderContext();
9 Y' U2 ]0 T, J - bounds = font.getStringBounds(str, frc);
3 {4 n0 w# ?$ D; T9 { - return Math.ceil(bounds.getWidth());
' {, ~7 G1 m) }9 H7 N - }) _0 `" U v( i% \
- . [" }5 Z" w. X
- da = (g) => {//底图绘制
9 N, b$ m" W2 C* b - g.setColor(Color.BLACK);) r1 o+ M2 o1 r! l j i& ?
- g.fillRect(0, 0, 400, 400);
5 ^- W/ U8 O5 |8 Y7 R( w8 c7 w [ - }
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' K# M+ z# h- x8 x- w' C- db = (g) => {//上层绘制
% N* r4 Z; ~* I2 U7 | - g.setColor(Color.WHITE);$ V( o9 Q& d9 D! W/ X
- g.fillRect(0, 0, 400, 400);8 a w3 }/ {( t2 y+ d3 g+ J
- g.setColor(Color.RED);1 x1 z c0 v: c- M+ M8 J' X/ F& J' E
- g.setFont(font0);
' C9 w7 V' @% j. D+ f* e! H - let str = "晴纱是男娘";& m- c: k, r) X5 M5 H: v6 r, x: Y
- let ww = 400;
2 Q, D: n7 B8 d! k& b - let w = getW(str, font0);
3 l5 R# A( n- E/ T. S8 H - g.drawString(str, ww / 2 - w / 2, 200);
, f' x& H' o! V- z - }
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3 l; {4 ]( Q# b f- const mat = new Matrices();9 b& _5 j b: Q9 h. K0 g! `3 G0 v
- mat.translate(0, 0.5, 0);
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0 P2 }+ D5 P4 K1 Y- q \% t- function create(ctx, state, entity) {2 h$ U7 j6 |5 l$ E4 f+ R0 f! A
- let info = {: @1 q: K. v6 u5 b5 u, ^
- ctx: ctx,, ~6 ?3 t$ w l8 v
- isTrain: false,
& u# }2 S7 h7 N/ _3 f - matrices: [mat],( J# W9 ^" T& V% @5 r* O$ R- v
- texture: [400, 400],$ T; r7 H) ~8 r4 G( G
- model: {5 {% b7 n; ]/ ?$ _4 A; ^ I
- renderType: "light",
, c7 V$ D, x% q% B+ g# o5 b/ s - size: [1, 1],
* ~% C; F* Z' G V: i. J# q3 G0 b - uvSize: [1, 1]
5 f, S$ w2 o1 _9 e - }
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- let f = new Face(info);, \# p) k x W# a
- state.f = f;
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- let t = f.texture;! d; P5 a- c5 m8 y# K: E* A
- let g = t.graphics;
. v/ A$ p/ `1 j! E - state.running = true;
! s, b% \5 x$ N+ X! ^9 z* z9 w/ g - let fps = 24;
- J( O$ v/ D4 O! e - da(g);//绘制底图; A K% \6 K$ ^! \! R0 G- |- V1 A
- t.upload();: {. x0 L3 q9 P7 l4 Q1 z0 P
- let k = 0;9 i8 ]. e5 H( P3 T! I
- let ti = Date.now();" c' Q& K% m9 o; g7 H0 f
- let rt = 0;
" I1 B) b N5 f* o - smooth = (k, v) => {// 平滑变化
5 y1 t% } \0 }4 ~7 j+ A - if (v > k) return k;
# J( K2 J7 a# w - if (k < 0) return 0;
& V! C3 `) n/ f5 n6 H$ f1 U' x - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
9 {5 T& s7 o U" D1 s - let id = Thread.currentThread().getId();
. R1 V* \5 K! B& o8 u - print("Thread start:" + id);
! X8 h( l- J6 B' q6 S - while (state.running) {
( G3 \0 t. `$ c& j, S6 h) [ - try {
' X" X. {$ U+ N* g* ] - k += (Date.now() - ti) / 1000 * 0.2;' h& _( k& \, I+ R- w! S) u" `9 B
- ti = Date.now();
% E) t0 t9 k0 t% [ - if (k > 1.5) {
' Y3 {0 f; o$ o" m! B - k = 0;
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- setComp(g, 1);9 g- \8 y0 y& M' e
- da(g);# ?) k' T) {+ S: O* F" }5 S. \6 r P
- let kk = smooth(1, k);//平滑切换透明度
8 Y9 W8 D7 X! N1 p' m& q9 r - setComp(g, kk);
/ G, a* p3 f2 H) Y - db(g);# Q% a2 g7 I& B$ f, {1 U1 y
- t.upload();+ i! L# r6 O& K2 ?5 B: T
- ctx.setDebugInfo("rt" ,Date.now() - ti);4 J8 @- h4 A( G) H: A3 u* }" w* g/ O
- ctx.setDebugInfo("k", k);2 D9 f$ ]7 Y- u1 U, t
- ctx.setDebugInfo("sm", kk);
& A0 l% E* k0 x - rt = Date.now() - ti;
% E, ?6 j7 d' V' d3 U8 c2 z/ q - Thread.sleep(ck(rt - 1000 / fps));7 c5 D) S6 S7 T# D
- ctx.setDebugInfo("error", 0)
4 t0 K$ Z; m6 F8 G. N. D - } catch (e) {& u' H2 S8 p8 B3 n
- ctx.setDebugInfo("error", e);
6 a% s4 g# g5 P" A - }
3 o: G2 @3 p i - }
( Z0 |4 ~/ W* ^7 S8 s - print("Thread end:" + id);% {/ \& X8 P+ E1 W4 z; h
- }
4 a- h6 h# y9 ^0 E" w - let th = new Thread(run, "qiehuan");1 b' M0 }: O6 s& p) w S5 J2 @
- th.start();2 t9 I6 J2 c* g) e$ r8 T5 g
- }
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- function render(ctx, state, entity) {
- N; R" j9 Z! ^9 ^ - state.f.tick();$ Q, r B3 D% H, r( a' R% G
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- 8 M1 G- R1 t% R; G" a! ^3 ?
- function dispose(ctx, state, entity) {1 L1 x D% x, n( t
- print("Dispose");8 }0 n9 @4 B& I8 |
- state.running = false;
6 h! y4 c2 U* v% R2 y8 `- E - state.f.close();
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& J9 J+ B& A# F, j# b- function setComp(g, value) {% ~9 G4 h; B8 I3 Z, x1 F9 N
- g.setComposite(AlphaComposite.SrcOver.derive(value));" l7 s7 G4 M$ e m
- }
复制代码 & }0 V/ T9 q6 g" g
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)+ ]9 X8 U# a2 n( a- u/ G5 e
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